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The lifestyle of symbiotic species in the genus Synalpheus can vary from pair living to eusocial. A pair-living social system commonly implies the adoption of a monogamous mating system. In...

Tunicates are the only metazoans capable of synthesising cellulose, which is present in the tunic. Cellulases (endo and exoglucanases) that can degrade or remodel cellulose might be necessary during the growth phase and during scarring after injury to the tunic. However, the occurrence of these enzymes in the tunic has not been reported. Hence, the aim of the study was to investigate the presence of cellulases as well as other glycoside hydrolases, such as xyloglucanases and mannanases, in the tunic of two Antarctic ascidian species, Ascidia challengeri and Pyura bouvetensis, and in the tropical species Phallusia nigra. Endoglucanases and xyloglucanase were found in all three species. Galactomannanases were detected in P. nigra and P. bouvetensis but were not found in A. challengeri. Cellulases that can degrade Avicel were found in P. bouvetensis. To the best of our knowledge, this is the first report detailing the presence of these enzymes in the tunic of ascidians. In A. challengeri, the optimal temperature for the endoglucanase activity was 9 °C, higher than their habitat temperature, but within the temperature tolerance of the species, while that of P. nigra was at 25–30 °C, which is close to the maximum temperature of its habitat. The temperature at which the endoglucanase has optimal activity is discussed as a proxy to the limit of thermal tolerance of the species that express this enzyme.

The lifestyle of symbiotic species in the genus

Made available in DSpace on 2022-05-01T05:29:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 In brachyuran crabs, the complexity of the copulatory system provides important information about the systematics of the group. Here we used scanning electron microscopy and light microscopy to provide information about the morphological changes during the gonopods ontogeny in the spider crab Mithraculus forceps. For this, a series of specimens were analysed and grouped in size classes of cephalothorax width (CW). The smaller males (first and second size classes) presented the first gonopod without a formed ejaculatory aperture and with an indistinct apical plate. The ejaculatory canal aperture is fully formed in size class 5 with 8.8 to 9.9 mm (CW). In adult males, the apical plate is divided in two lobes: a rounded mesial lobe and a distinct tapering lateral lobe with a large ejaculatory canal aperture. Throughout growth, there was an increment in number and/or size of the secondary cuticle structures, such as setae, spines, and sensilla. Morphological changes in the second gonopod are not abrupt during the ontogenetic development, with the girdle in the apical region and the median process becoming more prominent and tapered. Although to clearly determine the sexual maturity, information on the gonadal development (physiological sexual maturation) is needed, we observed that the gonopods morphology could provide important information to determine the sexual maturation. In our analyses, the morphological maturity occurred in line with the physiological maturity, both diagnosed in the size class 5. Laboratório de Sistemática Zoológica Universidade Estadual Paulista “Júlio de Mesquita Filho” Invertebrate Morphology Laboratory (IML) Department of Applied Biology School of Agricultural and Veterinary Sciences São Paulo State University (UNESP) Centro de Ciências da Saúde Unisagrado Laboratório de Biologia Marinha LabBMar Instituto Básico de Biociências de Taubaté UNITAU Department of Biological Sciences Universidade Regional do Cariri (URCA) Laboratório de Sistemática Zoológica Universidade Estadual Paulista “Júlio de Mesquita Filho” Invertebrate Morphology Laboratory (IML) Department of Applied Biology School of Agricultural and Veterinary Sciences São Paulo State University (UNESP)

Made available in DSpace on 2021-06-25T10:21:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) This study aimed to investigate the biodiversity of caridean shrimps inhabiting the consolidated sublittoral of two Brazilian biodiversity locals Laje de Santos and Vitória Island. We provide data about species composition, cumulative species curves and ecological indexes. Additionally, we compared different sampling techniques used for cryptic fauna studies. The samples were carried out quarterly for one year, using Artificial Refuge Substrate (ASR) for the passive capture and SCUBA diving for active capture. A total of 323 individuals were sampled with 17 species recorded, 13 in Vitória Island and 12 in Laje de Santos. Alpheus formosus and Cuapetes americanus were dominant in both areas and recognized as key-species for the community. Using two-sampling methods is highly recommended for future studies due to the fact that small and translucent species were obtained with ARS and large and colourful specimens were collected during SCUBA diving expeditions. An alien shrimp from the genus Athanas was registered for the first time in a protected area in Brazil. Additionally, all these results/data are important for future management and work plans in Brazilian protected areas since decapod crustaceans are an extremely important fauna group in any subtidal ecosystem. Instituto de Biociências Universidade Estadual Paulista (UNESP) Centro de Biociências Departamento de Zoologia Universidade Federal de Pernambuco (UFPE) Laboratório de Biologia Marinha Instituto Básico de Biociências Universidade de Taubaté (UNITAU) Laboratório de Ecologia de Ecossistemas Aquáticos (LEEA) Universidade Federal de Uberlândia (UFU) Departamento de Biologia Universidade Paulista (UNIP) Instituto de Biociências Universidade Estadual Paulista (UNESP)

This report provides the new record of the sponge Radiospongilla inesi and the slug Omalonyx matheroni for the Vale do Paraiba, State of Sao Paulo, southeastern Brazil, besides the symbiosis among R. inesi and individuals of some benthic macroinvertebrates. Monthly collections were carried out in the Ribeirao dos Mottas, with a 0.5 cm sieve in the edge vegetation, as well as collections by hand. Three specimens of R. inesi were found, from a lotic environment under pebbles. In addition, individuals of four insect families, Sisyridae, Hydropsychidae, Chironomidae e Simuliidae, were found on the sponge aquiferous system. Six individuals of the semi-aquatic slug O. matheroni were also caught under rocks and cans. Despite the sponges are commonly found in the most of the environments, the freshwater species represents one of the most unknown animal groups of the world. R. inesi was report at first time in Brazil in Pernambuco State, northeastern Brazil region, and this report represents just the second record of this species in Brazil, and the first time to the southeastern region. The presence of individuals of four insect families pointing out the importance of R. inesi on the life history of these animals. Despite some records of Omalonix sp. to the Sao Paulo State, this report seems to be the first record of the O. matheroni to the Vale do Paraiba, northern of the Sao Paulo State.

Made available in DSpace on 2019-09-12T16:26:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2018 ABSTRACT Hermit crabs are common and abundant members of the intertidal community and in sublittoral bottoms, where they play a fundamental role in the trophic chain. This study aimed to determine the composition of the hermit crab fauna, to quantify the density in the natural environment, and to register shells use by main species from subtidal boulder fields, in an island off the southeastern Brazilian coast. Monthly samples were taken from March 2010 to February 2011 on boulder fields on Couves Island, Ubatuba, Brazil, during scuba diving daytime sessions. Three hundred and eighty-three crabs were collected by hand, in a quadrat of 20 m2 belonging to five species: Calcinus tibicen, Dardanus venosus, Pagurus brevidactylus, Paguristes tortugae, and Petrochirus diogenes. The highest densities were recorded for P. brevidactylus and P. tortugae. Hermit crabs occupied shells of 15 gastropod species. Cerithium atratum, Gemophos auritulus, and Morula nodulosa comprised more than 80% of the occupation. The heterogeneity of boulder fields of Couves Island, composed almost entirely of small refuges and crevices, favors the exploration of hermit crab species recorded here, which are characterized by small size. These results, combined with the findings of further studies, can contribute to the development of effective monitoring programs for decapod crustacean species. [Cobo, Valter José] UNITAU, Brazil Alves, Douglas Fernandes Rodrigues] Universidade Federal de Sergipe, Brazil Lima, Daniel José Marcondes] Universidade de São Paulo, Brazil

Made available in DSpace on 2019-09-12T16:53:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2019 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Hermit crabs are soft-abdomen decapods. They depend upon gastropod shells for protection, with the latter influencing growth rate, mortality and reproduction. The present work aims to provide information about the biology and reproduction of Pagurus brevidactylus in a conservation area in Brazilian southeastern littoral. The material was sampled through active searching by SCUBA diving and refuge traps. We analyzed population structure, fecundity, reproductive output (RO), reproductive periodicity and shell utilization for P. brevidactylus. In total, 54 males, 18 non-ovigerous females, 34 ovigerous females and 10 juveniles were sampled. The females had a fecundity of 69.5 +/- 65 eggs, which was lower than that compared to other populations from different localities. The RO ranged from 1.48% to 63.04%, with a mean of 26.75 +/- 18.23%. There was a positive relationship between egg number and female size. The animals had continuous reproduction, but they reached smaller maximum sizes when compared with other populations. The shell occupation pattern was also different from other localities, the shells of Phrontis alba being the most occupied; this shell has a smaller size when compared to others that P. brevidactylus occupies in other localities. Therefore, P. alba could have had limited the growth and reproduction of P. brevidactylus. [da Silva, Alexandre Ribeiro; Galli, Giovanna Mielli; Stanski, Gilson; Castilho, Antonio Leao] Univ Estadual Paulista, UNESP, Dept Zool, Inst Biociencias Botucatu,NEBECC, BR-18618689 Botucatu, SP, Brazil [De Biasi, Juliana Beltramin] Univ Fed Paulista UNIFESP, Inst Mar, GenPesc, Lab Genet Pesqueira, Santos, Brazil [Davanso, Thiago Maia] Univ Paulista UNIP, Inst Ciencias Saude, Bauru, Brazil [Cobo, Valter Jose] Universidade de Taubaté (Unitau) , Inst Basico Biociencias, Lab Biol Marinha

Made available in DSpace on 2019-09-12T16:25:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2015 ABSTRACTThis contribution reviews the morphology and the main diagnostic characters of the peppermint shrimp Lysmata ankeri. Individuals were sampled by scuba divers from August 2008 to June 2013 on the subtidal rocky bottom at Couves Island, on the coast of São Paulo State, Brazil. In the laboratory, the individuals were analyzed morphologically, with emphasis on the characters used in the diagnosis of the species; measured as carapace length (CL); and photographed. Seventeen individuals of L. ankeri were analyzed with an average size of 6.9 ± 2.0 mm CL. From the morphological analysis the following variations of the diagnosis were observed: five teeth on the dorsal margin of the rostrum, in the diagnosis this was 6-8; five spines on the flexor margin of the dactyli of pereiopods 2-4, in the diagnosis this was 3-4. The records of this study extend the knowledge of the variation of some morphological characteristics for this species, resulting in an overlap among the species of the Lysmata wurdemanni complex. [Alves, Douglas Fernandes Rodrigues; Barros-Alves, Samara de Paiva; Hirose, Gustavo Luis] Universidade Federal de Sergipe, Brazil Cobo, Valter José] Universidade de Taubaté, Brazil

Made available in DSpace on 2018-11-12T17:28:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2017. Added 1 bitstream(s) on 2018-11-12T17:36:31Z : No. of bitstreams: 1 S0104-64972017000100214.pdf: 1721882 bytes, checksum: a3ac21fef06a69ec7d0a4609a7b6ecd1 (MD5) Abstract Mussel farms are one of the most important modalities of aquaculture and constitute almost 80% of the total bivalve production in Brazil, representing about 5% of the national production. Brachyuran crabs are common inhabitants of these environments and represent an important link in coastal marine food chains. The aim of this investigation is to describe the population structure of Panopeus austrobesus Williams, 1983 in a Perna perna (Linnaeus, 1758) farm located at the southeastern Brazilian coast. The samplings were carried out in the northeastern coast of São Paulo State. From May 2002 to April 2003, one mussel net was recovered monthly, and all individuals of P. austrobesus were collected. Population size-frequency analysis indicated a unimodal and non-normal distribution. Males were significantly larger than females, and the overall sex ratio significantly skewed from 1:1, female-biased. Recruitment occurred during the entire period, and ovigerous females were found in 11 months. The onset of sexual maturity was estimated around 5 mm cephalothorax width. Mussel farms represent an anthropogenic intervention in the sea landscape, causing environmental changes. However, these structures must allow species introduction, increasing their ecological and geographical distribution, and provide available space and food to establish new populations. This is particularly important for species with small populations, such as P. austrobesus. The results of this study attest the environmental counterpart role of the mussel farms. Once they can support populations, they may also help to reintroduce them into the area and could therefore be used in a consortium generating economic profits and acting as bioremediation tool, assuring the maintenance of the genetic patrimony. Fundação de Ensino e Pesquisa de Itajubá Núcleo de Estudos de Macroinvertebrados e Crustáceos de Água Doce Universidade Federal de Sergipe Universidade Estadual Paulista Instituto de Biociências de Botucatu Departamento de Zoologia Universidade de Taubaté Instituto Básico de Biociências Laboratório de Biologia Marinha (LabBMar) Universidade Estadual Paulista Instituto de Biociências de Botucatu Departamento de Zoologia

The goal of this paper was the comparison of the population structure and the reproductive period of Dardanus insignis from two sites in a subtropical area of the Brazilian coast. A total of 795 hermit crabs were obtained at Couves Island, being 56.4% males, 27.3% non-ovigerous females, 3.8% ovigerous females, and 12.5% juveniles; at Mar Virado Island a total of 336 specimens were captured, being 59.5% males, 31.8% non-ovigerous females, 4.7% ovigerous females, and 4.5% juveniles. The sex-ratio was statistically different from 1:1 in favor of males all study period in both sites. The reproductive period is seasonal in both sites and the juveniles’ recruitment occurred at first two winter months. Only males were found in the largest size classes. Despite of the distance and environmental and biological features of each site, both populations of D. insignis showed similar characteristics.

Made available in DSpace on 2019-09-12T16:53:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2013 Universidade de Taubaté (Unitau) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) The main purpose of this study was to provide an estimate for the onset of morphological sexual maturity in the freshwater crab Trichodactylus fluviatilis, from a population located in south-eastern Brazil, based on the relative growth relationships, as well as the characterization of "handedness". Monthly collections were carried out at night, from January 2006 to January 2007, in a small water body. In the laboratory, the crabs were sexed; the following body structures were measured and the estimate of onset of sexual maturity was given by the logistic function, as y = a/(1 + be(-cx)), for 50% of the population to reach the adult phase (CW(50)carapace width). Right propodus length and abdomen width were the best-fit relationships to represent the onset of sexual maturity for males and females, respectively. Based on the logistic function, the onset of sexual maturity was estimated to occur at around 18mm CW for both sexes. The relative growth recorded for this species is consistent with the model for brachyuran crabs (Hartnoll RG. 1982, Growth. In: Bliss, DE, editor. The biology of Crustacea: embryology, morphology and genetics. New York: Academic Press. p. 111-196), except for the abdomen growth, which is likely to be an adaptive condition related to protection of the newly hatched young. [Marcondes Lima, Daniel Jose; Rodrigues Alves, Douglas Fernandes; Barros-Alves, Samara de Paiva; Fransozo, Vivian] Univ Estadual Paulista, Inst Biociencias, Dept Zool, BR-18618970 Botucatu, SP, Brazil [Marcondes Lima, Daniel Jose; Cobo, Valter Jose; Rodrigues Alves, Douglas Fernandes; Barros-Alves, Samara de Paiva; Fransozo, Vivian] Univ Estadual Paulista, Inst Biociencias, Dept Zool, NEBECC Grp Studies Crustacean Biol Ecol & Culture, BR-18618970 Botucatu, SP, Brazil [Cobo, Valter Jose] Universidade de Taubaté (Unitau), Inst Biociencias, Lab Biol Marinha

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:45:21Z No. of bitstreams: 1 S2179-975X2012000300005.pdf: 580998 bytes, checksum: d6c721bc05230196cb53c18cc92068a3 (MD5) Made available in DSpace on 2013-08-22T18:45:21Z (GMT). No. of bitstreams: 1 S2179-975X2012000300005.pdf: 580998 bytes, checksum: d6c721bc05230196cb53c18cc92068a3 (MD5) Previous issue date: 2012-09-01 Made available in DSpace on 2013-09-30T19:34:19Z (GMT). No. of bitstreams: 2 S2179-975X2012000300005.pdf: 580998 bytes, checksum: d6c721bc05230196cb53c18cc92068a3 (MD5) S2179-975X2012000300005.pdf.txt: 30936 bytes, checksum: a9ad9c416a0722b718d94c89c9125d2b (MD5) Previous issue date: 2012-09-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:53:59Z No. of bitstreams: 2 S2179-975X2012000300005.pdf: 580998 bytes, checksum: d6c721bc05230196cb53c18cc92068a3 (MD5) S2179-975X2012000300005.pdf.txt: 30936 bytes, checksum: a9ad9c416a0722b718d94c89c9125d2b (MD5) Made available in DSpace on 2014-05-20T13:53:59Z (GMT). No. of bitstreams: 2 S2179-975X2012000300005.pdf: 580998 bytes, checksum: d6c721bc05230196cb53c18cc92068a3 (MD5) S2179-975X2012000300005.pdf.txt: 30936 bytes, checksum: a9ad9c416a0722b718d94c89c9125d2b (MD5) Previous issue date: 2012-09-01 OBJETIVO: A biologia populacional do camarão de água doce Macrobrachium jelskii foi investigada, com ênfase na distribuição de frequência em classes de tamanho, razão sexual, período reprodutivo e recrutamento juvenil. Além disso, a abundância dos indivíduos foi correlacionada com os fatores abióticos. MÉTODOS: Amostras foram coletadas mensalmente de julho de 2005 a junho de 2007, às margens do Rio Grande, região de Planura, estado de Minas Gerais, Brasil (20º 09' S e 48º 40' W), usando uma rede de arrasto (1.0 mm tamanho da malha e 2.0 × 0.5 m de largura). O equipamento foi arrastado por duas pessoas às margens da vegetação do rio por 100 metros de distância, percorridos por uma hora. em laboratório, os espécimes foram identificados, mensurados e sexados. RESULTADOS: Um total de 2,789 espécimes foi analisado, no qual correspondem a 1,126 machos (549 jovens e 577 adultos) e 1,663 fêmeas (1,093 jovens, 423 adultos não ovígeras e 147 ovígeras). A razão sexual diferiu significativamente a favor de fêmeas de M. jelskii (1:1.48; χ² = 103.95; p < 0.0001). A média de tamanho do comprimento da carapaça (CL) das fêmeas (6.32 ± 1.84 mm CL) foi estatisticamente maior do que dos machos (5.50 ± 1.07 mm CL) (p < 0.001). A distribuição de freqüência em classes de tamanho dos espécimes revela um padrão de distribuição unimodal e não normal para machos e fêmeas (W = 0.945; p < 0.01). Não foi observada relação entre a abundância de M. jelskii e as variáveis ambientais (p = 0.799). CONCLUSÃO: A presença de fêmeas ovígeras e jovens na população sugere um padrão de reprodução e recrutamento contínuos para M. jelskii na região de Planura. AIM: The population biology of the freshwater shrimp Macrobrachium jelskii was investigated here emphasizing the length-frequency distribution, sex ratio, reproductive period and juvenile recruitment. In addition, the abundance of individuals was correlated with the abiotic factors. METHODS: Samples were collected on a monthly basis from July 2005 to June 2007 along the river margin in shallow water of Grande River, at Planura region, State of Minas Gerais, Brazil (20º 09' S and 48º 40' W), using a trawl net (1.0 mm mesh size, and 2.0 m × 0.5 m wide). The fishing gear was handled by two people along the marginal vegetation of the Grande River in a course of 100 m, covered for one hour. In the laboratory, the specimens were identified, measured and sexed. RESULTS: A total of 2,789 specimens was analyzed, which corresponded to 1,126 males (549 juveniles and 577 adults) and 1,663 females (1,093 juveniles, 423 adults non-ovigerous and 147 ovigerous). The sex ratio differed significantly in favor of the females of M. jelskii (1:1.48; χ² = 103.95; p < 0.0001). The mean size of carapace length (CL) of females (6.32 ± 1.84 mm CL) was statistically higher than of males (5.50 ± 1.07 mm CL) (p < 0.001). The length-frequency distribution of the specimens revealed an unimodal pattern and non-normal distribution for males and females (W = 0.945; p < 0.01). No significant relationship between the abundance of M. jelskii and the environmental variables was observed (p = 0.799). CONCLUSION: The presence of ovigerous females and juveniles in the population suggests a continuous reproduction pattern and recruitment for M. jelskii at Planura region. Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia Instituto Federal de Educação, Ciência e Tecnologia Baiano Centro Universitário do Planalto de Araxá Universidade de Taubaté Instituto de Biociências Laboratório de Biologia Marinha Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia

Made available in DSpace on 2019-10-04T12:34:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-01-01. Added 1 bitstream(s) on 2021-07-15T15:04:52Z : No. of bitstreams: 1 S0104-64972016000100217.pdf: 2281859 bytes, checksum: 608478a36d036fad54fd7f67f5ffec40 (MD5) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) The morphology of the first zoeal stage of Domecia acanthophora (Desbonne, in Desbonne & Schramm, 1867) was described from laboratory-hatched material obtained from ovigerous females collected at Vitoria Island on the southeastern Brazilian coast. We compared the larval morphology (zoea I) of fourteen species of the superfamily Trapezioidea, which Domecia glabra Alcock, 1899 is the only congeneric representative of the species described in this study. The morphological characteristics of the first zoea that distinguish D. acanthophora from D. glabra are: three aesthetascs on the exopod antennule; three pairs of lateral spines on carapace; bilobed basial endite of maxilla, with four plumodenticulate setae on each lobe; and telson furcae distally spinulated. It also provides information that may enhance some phylogenetic hypotheses within Trapezioidea crabs. Univ Fed Sergipe, Lab Carcinol, BR-49100000 Sao Cristovao, Sergipe, Brazil Univ Estadual Paulista, UNESP, Lab Biol Camaroes Marinhos & Agua Doce LABCAM, BR-17033360 Bauru, SP, Brazil Univ Taubate, Lab Biol Marinha LABBMAR, UNITAU, BR-12030180 Taubate, SP, Brazil Univ Estadual Paulista, Grp Studies Crustacean Biol Ecol & Culture NEBECC, Dept Zool, UNESP, BR-18618970 Botucatu, SP, Brazil Univ Estadual Paulista, UNESP, Lab Biol Camaroes Marinhos & Agua Doce LABCAM, BR-17033360 Bauru, SP, Brazil Univ Estadual Paulista, Grp Studies Crustacean Biol Ecol & Culture NEBECC, Dept Zool, UNESP, BR-18618970 Botucatu, SP, Brazil CNPq: 134950/2007-0 CNPq: PQ 305919/2014-8

Made available in DSpace on 2019-09-12T16:53:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2013 Universidade de Taubate (Unitau) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) The population biology of Epialtus bituberculatus was compared between two different intertidal localities with differing levels of wave exposure. Sampling was conducted monthly between January and December, 2001 on seaweed banks of Sargassum cymosum in the intertidal zone of the rocky shores Grande (GR) (23 degrees 23 ' S-45 degrees 03 ' W S-45 degrees 03 ' W) and Domingas Dias ( DD) ( 23 degrees 29 ' S-45 degrees 08 ' W). Four hundred and twenty-eight crabs were captured at the GR site: 111 juvenile males, 106 adult males, 57 juvenile females, 17 adult females and 137 ovigerous females; while 455 specimens were obtained at the DD site: 76 juvenile males, 113 adult males, 37 juvenile females, 40 adult females and 189 ovigerous females. The population from GR showed a non-normal distribution and from DD a normal distribution. The sex-ratio (female/male) was 1:0.97 at GR (x(2) 0.77, P = 0.084), whereas it was 1:1.41 at DD (x(2) 13.03, P < 0.001). The largest individuals occurred at DD (U = 78249.0, P < 0.001). The estimated size at sexual maturity was 6.3 and 5.0 mm carapace width (CW) for males, and 5.4 and 5.2 mm CW for females, from GR and DD, respectively. The observed differences in E. bituberculatus between the studied localities might be explained by the different degrees of wave exposure between sites. However, other factors that might also explain the observed differences (e.g. temperature, salinity and food availability) cannot be discarded as relevant in influencing the population structure between sites herein studied. [de Paiva Barros-Alves, Samara; Rodrigues Alves, Douglas Fernandes] Univ Estadual Paulista UNESP, Dept Zool, Inst Biociencias, BR-18618970 Sao Paulo, Brazil [de Paiva Barros-Alves, Samara; Rodrigues Alves, Douglas Fernandes; Cobo, Valter Jose] Universidade de Taubaté (Unitau) , NEBECC Grp Studies Crustacean Biol Ecol & Culture [Cobo, Valter Jose] Universidade de Taubaté (Unitau) , Inst Biociencias, Lab Biol Marinha LabBMar

[This study provides information concerning the feeding behaviour of Goniopsis cruentata (Latreille, 1803), through analysis of stomach contents according to demographic categories. Collections were carried out monthly from May 2005 through April 2006 in a subtropical estuary on the southeastern Brazilian coast (23°29′24″S 45°10′12″W). The crabs were collected by hand, with a 2-hour sampling effort by three people. In the laboratory, the crabs were sexed and measured for greatest carapace width, and grouped into demographic categories: adult males, juvenile males, adult females, juvenile females, and ovigerous females. For the fullness analysis, the stomachs were grouped into two categories: (1) E = Empty, with no food; and (2) F = Full, whether partially filled or totally. The frequency-of-occurrence method was used to characterize feeding behaviour, and the demographic categories recognired were compared. We obtained stomachs from 171 adult males, 69 juvenile males, 136 adult females, 72 juvenile females, and 41 ovigerous females, of which 85.6% were full. Of the eight food items recorded, sediment was the most frequent, and "unidentified material" was the least. Goniopsis cruentata can be characterized as a generalist feeder, exploiting most of the food items available in the mangrove swamps. In spite of this generalist behaviour, the dominant presence of sediment suggests that G. cruentata is primarily a detritivore that exploits particulate organic matter from microbial biodegradation, one of the most important mangrove functions. The trophic role of this crab in the ecosystem showed no significant differences among the demographic categories, and seems to be wider than those observed for sesarmid and ocypodid mangrove crabs. These ecosystem engineers may occupy different positions in the trophic chains of estuarine environments. Este estudo providencia informacoes sobre a composicao da dieta do caranguejo Goniopsis cruentata (Latreille, 1803) por meio de analise do conteudo estomacal, caracterizando os habitos alimentares nas diferentes categorias demograficas bem como a dinâmica temporal da alimentacao desses animais. O estudo foi realizado em um estuario em Ubatuba, Estado de Sao Paulo, litoral sudeste do Brasil, no periodo de maio de 2005 a maio de 2006. Os estomagos foram retirados e conservados em alcool 70%. Foi utilizado o metodo de Frequencia de Ocorrencia e as categorias demograficas foram comparadas. Foram analisados 489 estomagos, sendo 171 de machos adultos com tamanho medio de 33,14 ± 6,4 mm LC, 69 de machos jovens de tamanho medio 21,16 ± 4,9 mm LC, 136 de femeas adultas, com tamanho medio de 32,9 ± 5,1 mm LC, 72 de femeas jovens, com tamanho medio de 24,0 ± 3,3 mm LC e 41 estomagos de femeas ovigeras, com tamanho medio de 35,4 ± 4,4 mm LC. Foram identificados oito itens alimentares, sendo Sedimento o mais representativo. Nao foi verificada diferenca significativa entre as categorias alimentares entre as diferentes fases de desenvolvimento nem em relacao aos sexos, com excecao do item mollusca, mais frequente nos estomagos de femeas. Houve diferenca significativa entre femeas adultas e femeas ovigeras para os itens alimentares: algas, mollusca, vegetal e sedimento. Nao foram observadas alteracoes significativas na dieta nas diferentes estacoes do ano. Apesar do predominio do sedimento da composicao da dieta de G. cruentata , a especie demonstrou explorar varios outros itens alimentares. A maior importância do sedimento sugere que a especie adote a detritivoria como seu principal metodo para a obtencao de alimento, entretanto, a variedade de itens alimentares encontrados no trato digestivo tambem aponta G. cruentata como oportunista e generalista. , This study provides information concerning the feeding behaviour of Goniopsis cruentata (Latreille, 1803), through analysis of stomach contents according to demographic categories. Collections were carried out monthly from May 2005 through April 2006 in a subtropical estuary on the southeastern Brazilian coast (23°29′24″S 45°10′12″W). The crabs were collected by hand, with a 2-hour sampling effort by three people. In the laboratory, the crabs were sexed and measured for greatest carapace width, and grouped into demographic categories: adult males, juvenile males, adult females, juvenile females, and ovigerous females. For the fullness analysis, the stomachs were grouped into two categories: (1) E = Empty, with no food; and (2) F = Full, whether partially filled or totally. The frequency-of-occurrence method was used to characterize feeding behaviour, and the demographic categories recognired were compared. We obtained stomachs from 171 adult males, 69 juvenile males, 136 adult females, 72 juvenile females, and 41 ovigerous females, of which 85.6% were full. Of the eight food items recorded, sediment was the most frequent, and "unidentified material" was the least. Goniopsis cruentata can be characterized as a generalist feeder, exploiting most of the food items available in the mangrove swamps. In spite of this generalist behaviour, the dominant presence of sediment suggests that G. cruentata is primarily a detritivore that exploits particulate organic matter from microbial biodegradation, one of the most important mangrove functions. The trophic role of this crab in the ecosystem showed no significant differences among the demographic categories, and seems to be wider than those observed for sesarmid and ocypodid mangrove crabs. These ecosystem engineers may occupy different positions in the trophic chains of estuarine environments. Este estudo providencia informacoes sobre a composicao da dieta do caranguejo Goniopsis cruentata (Latreille, 1803) por meio de analise do conteudo estomacal, caracterizando os habitos alimentares nas diferentes categorias demograficas bem como a dinâmica temporal da alimentacao desses animais. O estudo foi realizado em um estuario em Ubatuba, Estado de Sao Paulo, litoral sudeste do Brasil, no periodo de maio de 2005 a maio de 2006. Os estomagos foram retirados e conservados em alcool 70%. Foi utilizado o metodo de Frequencia de Ocorrencia e as categorias demograficas foram comparadas. Foram analisados 489 estomagos, sendo 171 de machos adultos com tamanho medio de 33,14 ± 6,4 mm LC, 69 de machos jovens de tamanho medio 21,16 ± 4,9 mm LC, 136 de femeas adultas, com tamanho medio de 32,9 ± 5,1 mm LC, 72 de femeas jovens, com tamanho medio de 24,0 ± 3,3 mm LC e 41 estomagos de femeas ovigeras, com tamanho medio de 35,4 ± 4,4 mm LC. Foram identificados oito itens alimentares, sendo Sedimento o mais representativo. Nao foi verificada diferenca significativa entre as categorias alimentares entre as diferentes fases de desenvolvimento nem em relacao aos sexos, com excecao do item mollusca, mais frequente nos estomagos de femeas. Houve diferenca significativa entre femeas adultas e femeas ovigeras para os itens alimentares: algas, mollusca, vegetal e sedimento. Nao foram observadas alteracoes significativas na dieta nas diferentes estacoes do ano. Apesar do predominio do sedimento da composicao da dieta de G. cruentata , a especie demonstrou explorar varios outros itens alimentares. A maior importância do sedimento sugere que a especie adote a detritivoria como seu principal metodo para a obtencao de alimento, entretanto, a variedade de itens alimentares encontrados no trato digestivo tambem aponta G. cruentata como oportunista e generalista. ]

[The present study assessed the composition and abundance of species of Anomura at the southeastern coast of Brazil. Sampling was carried out monthly from January 1998 to December 1999, in three regions of Ubatuba: Ubatumirim Bay, Ubatuba Bay and Mar Virado Bay, using a fishing boat equipped with two double-rigged nets. Four transects were defined at depths of 5, 10, 15, and 20 meters in each bay. Two additional transects were defined perpendicular to the beach: one in a sheltered area and the other in an area exposed to wave action. A total of 6356 specimens of anomurans representing 15 species and 9 genera of 3 superfamilies (11 Paguroidea, 1 Hippoidea, and 3 Galatheoidea) was recorded. Paguristes robustus was recorded for the first time from the Sao Paulo State coast. Dardanus insignis was the most abundant species, followed by Loxopagurus loxochelis and Porcellana sayana . The high abundance of P. sayana may be related to the presence of D. insignis and Petrochirus diogenes , because this porcellanid crab lives inside the shells occupied by these hermit crabs. Species richness varied among the bays and transects, but the highest values were observed at the exposed and sheltered areas. The highest abundance of anomurans was recorded at a depth of 20 m during winter in the bays Mar Virado and Ubatuba. The anomuran species comprised 75% of the total number previously recorded from coastal non-consolidated bottoms of Sao Paulo. We therefore infer that this region affords favourable biotic and abiotic conditions for the settlement and maintenance of a large number of species of Anomura. O presente estudo avaliou a composicao e a abundância das especies de Anomura na costa Sudeste do Brasil. Amostragens foram realizadas de Janeiro de 1998 a Dezembro de 1999, em tres regioes de Ubatuba: baia do Ubatumirim, baia de Ubatuba e baia do Mar Virado, utilizando-se um barco de pesca camaroneiro equipado com duas redes de arrasto. Quatro transectos foram definidos nas profundidades de 5, 10, 15, e 20 metros em cada baia. Dois transectos adicionais foram definidos perpendicularmente a praia: uma em area abrigada e outra em uma area exposta a acao de ondas. Um total de 6.356 especimes de anomuros, representando 15 especies, 9 generos e 3 superfamilias (11 Paguroidea, 1 Hippoidea e 3 Galatheoidea) foram registrados. Paguristes robustus foi registrado pela primeira vez na costa do Estado de Sao Paulo. Dardanus insignis foi a especie mais abundante, seguida por Loxopagurus loxochelis e Porcellana sayana . A alta abundância de P. sayana pode estar relacionada a presenca de D. insignis e Petrochirus diogenes , ja que este porcelanideo habita o interior de conchas ocupadas por estes ermitoes. A riqueza das especies variou entre as baias e os transectos, e os maiores valores foram observados nas areas expostas e abrigadas da acao de ondas. As maiores abundâncias de anomuros foram registradas na profundidade de 20 metros durante o inverno nas baias de Mar Virado e Ubatuba. As especies de anomuros compuseram 75% do total previamente registrado para toda a costa do Estado de Sao Paulo, referente ao fundo nao consolidado. Podemos inferir que esta regiao oferece condicoes bioticas e abioticas favoraveis para o assentamento e a manutencao de um grande numero de especies de anomuros. , The present study assessed the composition and abundance of species of Anomura at the southeastern coast of Brazil. Sampling was carried out monthly from January 1998 to December 1999, in three regions of Ubatuba: Ubatumirim Bay, Ubatuba Bay and Mar Virado Bay, using a fishing boat equipped with two double-rigged nets. Four transects were defined at depths of 5, 10, 15, and 20 meters in each bay. Two additional transects were defined perpendicular to the beach: one in a sheltered area and the other in an area exposed to wave action. A total of 6356 specimens of anomurans representing 15 species and 9 genera of 3 superfamilies (11 Paguroidea, 1 Hippoidea, and 3 Galatheoidea) was recorded. Paguristes robustus was recorded for the first time from the Sao Paulo State coast. Dardanus insignis was the most abundant species, followed by Loxopagurus loxochelis and Porcellana sayana . The high abundance of P. sayana may be related to the presence of D. insignis and Petrochirus diogenes , because this porcellanid crab lives inside the shells occupied by these hermit crabs. Species richness varied among the bays and transects, but the highest values were observed at the exposed and sheltered areas. The highest abundance of anomurans was recorded at a depth of 20 m during winter in the bays Mar Virado and Ubatuba. The anomuran species comprised 75% of the total number previously recorded from coastal non-consolidated bottoms of Sao Paulo. We therefore infer that this region affords favourable biotic and abiotic conditions for the settlement and maintenance of a large number of species of Anomura. O presente estudo avaliou a composicao e a abundância das especies de Anomura na costa Sudeste do Brasil. Amostragens foram realizadas de Janeiro de 1998 a Dezembro de 1999, em tres regioes de Ubatuba: baia do Ubatumirim, baia de Ubatuba e baia do Mar Virado, utilizando-se um barco de pesca camaroneiro equipado com duas redes de arrasto. Quatro transectos foram definidos nas profundidades de 5, 10, 15, e 20 metros em cada baia. Dois transectos adicionais foram definidos perpendicularmente a praia: uma em area abrigada e outra em uma area exposta a acao de ondas. Um total de 6.356 especimes de anomuros, representando 15 especies, 9 generos e 3 superfamilias (11 Paguroidea, 1 Hippoidea e 3 Galatheoidea) foram registrados. Paguristes robustus foi registrado pela primeira vez na costa do Estado de Sao Paulo. Dardanus insignis foi a especie mais abundante, seguida por Loxopagurus loxochelis e Porcellana sayana . A alta abundância de P. sayana pode estar relacionada a presenca de D. insignis e Petrochirus diogenes , ja que este porcelanideo habita o interior de conchas ocupadas por estes ermitoes. A riqueza das especies variou entre as baias e os transectos, e os maiores valores foram observados nas areas expostas e abrigadas da acao de ondas. As maiores abundâncias de anomuros foram registradas na profundidade de 20 metros durante o inverno nas baias de Mar Virado e Ubatuba. As especies de anomuros compuseram 75% do total previamente registrado para toda a costa do Estado de Sao Paulo, referente ao fundo nao consolidado. Podemos inferir que esta regiao oferece condicoes bioticas e abioticas favoraveis para o assentamento e a manutencao de um grande numero de especies de anomuros. ]

Made available in DSpace on 2019-09-12T16:53:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2015 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The reproductive capacity of the swimming crab Callinectes danae Smith, 1869 was assessed based on the reproductive investment (RI) of ovigerous females and the gonadosomatic index (GI) of non-ovigerous adult females. Crabs were collected in June 2009 with a shrimp fishing boat at Ubatuba (23 degrees 26 ' S 45 degrees 02 ' W) Sao Paulo, Brazil. Overall, 191 adult females were analyzed, of which 108 were ovigerous and 83 non-ovigerous. The size of ovigerous females ranged from 54.5 to 79.8mm carapace width (CW) and non-ovigerous females ranged from 56.0 to 80.9mm CW. RI values did not differ among the size classes (ANOVA, p>0.05), with an overall mean of 15.8%. The same occurred with the Gonadossomatic index for non-ovigerous females, for which the mean value was 11.7%. The regression between the dry weight of the egg mass and the dry weight of the crab (Student's t, p=0.25; t(tab)=1.66; t(cal)=0.66) indicated an isometric relationship for the variables analyzed. The simultaneous occurrence of gonadal maturation and embryonic development in ovigerous females suggests that these crabs may spawn at least twice in the same breeding season and reveals the need for evaluation of the allocation of energy in subsequent spawns. [Antunes, Mariana; Fransozo, Vivian; Castilho, Antonio Leao; Cobo, Valter Jose; Teixeira, Gustavo Monteiro; Fransozo, Adilson] Univ Estadual Paulista, Inst Biociencias, NEBECC Study Grp Crustacean Biol Ecol & Culture, Dept Zool, BR-18168970 Botucatu, SP, Brazil [Fransozo, Vivian] Univ Estadual Sudoeste Bahia, Dept Ciencias Nat, BR-45031900 Vitoria Da Conquista, BA, Brazil [Cobo, Valter Jose] Universidade de Taubaté (Unitau), LabBMar Marine Biol Lab, BR-12030180 Taubate, SP, Brazil [Teixeira, Gustavo Monteiro] Univ Estadual Londrina, Dept Biol Anim & Vegetal, BR-86057970 Londrina, PR, Brazil

Made available in DSpace on 2019-09-11T20:58:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2006 Investigações sobre a distribuição de organismos marinhos proporcionam um melhor entendimento dos padrões de distribuição e dispersão desses animais. As ampliações dos limites de distribuição de crustáceos decápodos em águas brasileiras têm sido registradas de maneira constante e gradual, mas ainda permanecem pouco compreendidas. Este estudo fornece informações sobre a ampliação da distribuição de oito espécies de caranguejos braquiúros e uma espécie de caranguejo porcelanídeo. Os animais foram obtidos por meio de mergulho Scuba durante um programa amostral, realizado na região da Ilha da Vitória, Ilhabela, litoral norte paulista (23º44'04"S-45º01'35"W), entre fevereiro de 2004 e janeiro de 2005. Estes novos registros ampliam a distribuição geográfica do porcelanídeo Petrolisthes amoenus (Guérin Menéville, 1855), dos majóideos Mithrax caribbaeus Rathbun, 1920, Mithrax verrucosus H. Milne Edwards, 1832, Nemausa acuticornis (Stimpson, 1871) e Teleophrys ornatus Rathbun, 1901, além dos xantóideos Domecia acanthophora acanthophora (Desbonne & Schramm, 1867), Garthiope spinipes (A. Milne Edwards, 1880), Xanthodius denticulatus (White, 1847) e Xanthodius parvulus (Fabricius, 1793) para o litoral paulista. O recente registro dessas espécies pode estar relacionado com diferentes mecanismos de dispersão larval, transporte larval por meio de água de lastro ou ainda o registro tardio. Investigations of the distribution of marine organisms provide a better understanding of the patterns of distribution and dispersal of these animals. Extensions of the distributional limits of decapod crustaceans in Brazilian waters have been recorded steadily and gradually, but these limits still remain poorly understood. The present study provides information extending the known range of eight species of brachyuran crabs and one species of porcellanid crab. The animals were obtained by Scuba diving during a sampling program carried out near Vitória Island, Ilhabela, on the northeastern coast of the State of São Paulo (23º44'04"S-45º01'35"W) between February, 2004 and January, 2005. These new records extend the geographical distributions of the porcellanid Petrolisthes amoenus (Guérin Menéville, 1855), the majoids Mithrax caribbaeus Rathbun, 1920, Mithrax verrucosus H. Milne Edwards, 1832, Nemausa acuticornis (Stimpson, 1871) and Teleophrys ornatus Rathbun, 1901, and the xanthoids Domecia acanthophora acanthophora (Desbonne & Schramm, 1867), Garthiope spinipes (A. Milne Edwards, 1880), Xanthodius denticulatus (White, 1847) and Xanthodius parvulus (Fabricius, 1793) to the São Paulo coast. These new records may be related to different mechanisms of larval dispersal, larval transport by ballast water, or may simply be exceptional records. [Melo, Gustavo A. S. de] Universidade de São Paulo, Brazil Alves, Douglas F. R.; Cobo, Valter J.] Universidade de Taubaté, Brasil

This investigation provided information on the physiological sexual maturity and relationships of growth and reproduction in Goniopsis cruentata (Latreille, 1803). Collections were made monthly from January 1995 through December 1996, on the northeastern coast of São Paulo State, Brazil. The crabs were grouped into juvenile males; adult males; juvenile females, and adult females, including ovigerous ones. For each specimen the carapace width (CW) was measured, and molt condition and macroscopic developmental stage of the gonad tissue were recorded. CWs of physiologically mature crabs were between 21.4 and 23.7 mm for both sexes. This population showed molt activity in all size groups throughout the study period, which suggests continuous growth and the absence of terminal anecdysis. This may be associated with the ability of these animals to copulate during the intermolt, supplying a high proportion of mature individuals over time and ensuring continuity of reproduction year-round.Este trabalho fornece informações sobre as relações entre a maturidade sexual e o crescimento do caranguejo Goniopsis cruentata (Latreille, 1803). Durante o período de janeiro de 1995 a dezembro de 1996 foram realizadas coletas mensais na região de Ubatuba, litoral norte do Estado de São Paulo. Os animais capturados foram reunidos em quatro grupos de interesse: macho jovem, macho adulto, fêmea jovem e fêmea adulta, em que estão incluídas as ovígeras. Para cada animal foi mensurada a largura da carapaça (LC) e anotadas a condição de muda e o estágio do desenvolvimento gonadal. A maturidade fisiológica foi observada entre 21.4 e 23.7mmLC para ambos os sexos. A população amostrada apresentou atividade de muda em todas as classes de tamanho durante todo o período estudado, o que sugere o estabelecimento de um padrão de crescimento contínuo e ausência de anecdise terminal para essa espécie. Esse fato pode estar associado com a habilidade desses animais em copular durante a intermuda, gerando uma grande quantidade de indivíduos maduros durante todo o ano, garantindo a continuidade do processo reprodutivo.

The majority of the Una River Basin is located in Taubate County and contributes significantly to its water supply. The main goal of this research was to evaluate the water quality of the Una River using the microcrustacean C. dubia as bioindicator for tests of chronic and acute toxicity. Bimonthly water samples were obtained from each of six localities throughout the Una Basin, from March to October, 2011. Physical-chemical water parameters such as pH, electrical conductivity, hardness, dissolved oxygen and precipitation were measured and correlated to the C. dubia reproductive rates. No significant relationships were found between the water’s electrical conductivity and precipitation with respect to bioindicator reproductive rates. However, at the Sete Voltas, Antas and Rocinha Sub-Basins, significant interactions were detected between some water parameters and reproductive rates, suggesting that water may constrain the reproduction of C. dubia. Acute toxicity was not detected in any of the six sites, while chronic toxicity was recorded at Rocinha, Sete Voltas, Antas, Medio and Baixo Una Sub-Basins. In general, the water quality of the Una Basin, as indicated by the absence of acute toxicity, still remains in an acceptable conservation condition. Caution is needed, however, since slight pollution sources are causing chronic toxicity in some localities. In addition, as the microcrustacean C. dubia, appeared to be a reliable bioindicator in this investigation, we suggest that it be used for continuous water quality monitoring programs.

Made available in DSpace on 2019-09-12T16:32:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2013 The spatial and seasonal distribution of different demographic groups of the swimming crab Callinectes ornatus was analyzed with respect to its population biology in three bays (Ubatumirim, Ubatuba, and Mar Virado) in southeastern Brazil. In each bay, monthly sampling was performed during two years along six transects, established at 5, 10, 15, and 20 m depth (parallel to the beach line), in a wave-sheltered area (7.5 m depth), and at an exposed site (10 m depth). Total abundance of crabs was similar among the bays. The presence of immature individuals, adult females, and breeding females was positively correlated with the bottom and surface temperatures, whereas adult males showed an opposite trend with respect to these factors. Immature and smaller individuals were most abundant along the sheltered and shallower transects. Males were more abundant along the shallower transects, and females at 15 and 20 m. This study revealed that different demographic groups occupy the habitat in different ways, according to local features. In general, southeastern Brazil offers a range of conditions that favor reproduction and consequently the maintenance and growth of the local population of C. ornatus, contributing to the relatively high abundance of the species in this coastal area. Se analizó la distribución espacial y temporal de distintos grupos demográficos del cangrejo nadador Callinectes ornatus en cuanto a su biologia poblacional en tres bahias (Ubatumirim, Ubatuba y Mar Virado) en el sureste de Brasil. En cada bahia se realizaron muestreos mensuales durante dos años en seis transectos, establecidos a 5, 10, 15 y 20 m de profundidad (paralelo a la linea de costa), en una zona protegida del oleaje (7.5 m de profundidad) y en un sitio expuesto al oleaje (10 m de profundidad). La abundancia total de cangrejos fue similar entre bahias. Se observó una correlación positiva entre la presencia de individuos inmaduros, hembras adultas y hembras ovigeras con la temperatura del fondo y superficial, mientras que los machos adultos mostraron una tendencia opuesta con respecto a estos factores. La mayor abundancia de individuos inmaduros y pequeños fue detectada en los transectos protegidos y menos profundos. Los machos fueron más abundantes en los transectos menos profundos, y las hembras a 15 y 20 m de profundidad. Este estudio reveló que los diferentes grupos demográficos ocupan el hábitat de diferentes maneras, de acuerdo con las caracteristicas locales. En general, el sureste de Brasil ofrece diferentes condiciones que favorecen la reproducción y consecuentemente la continuidad y el crecimiento de la población local de C. ornatus, contribuyendo a la relativamente alta abundancia de la especie en esta zona costera. [Fransozo, Vivian] Universidade Estadual do Sudoeste da Bahia, Brazil Cobo, Valter José] Universidade de Taubaté, Brazil Andrade, Luciana Segura de; Castilho, Antônio Leão; Fransozo, Adilson] Universidade Estadual Paulista, Brazil Bertini, Giovana] Universidade Estadual Paulista, Brazil

The first zoeal stages of ?Cataleptodius parvulus and Xanthodius denticulatus are described and compared with zoeae of other members of the subfamily Xanthinae. The larvae of ?C. parvulus and X. denticulatus differ mainly in: 1) spinulation of rostral and dorsal spines; 2) type of antenna; 3) setation of the basis of first maxilliped; and 4) type of telson. Features common to both species include a carapace provided with well-developed spines on the dorsal (1), rostral (1), and lateral (2) portions; and the antennal protopod and rostrum similar in length. The morphological differences between the zoea I of X. denticulatus and ?C. parvulus are nevertheless consistent enough to suggest that these species do not belong to the same genus Xanthodius Stimpson, 1859 as previously supposed. Also we presume that ?C. parvulus does not belong to the genus Cataleptodius.

Made available in DSpace on 2019-09-11T20:51:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2015 Goniopsis cruentata é um caranguejo semi-terrestre comum em manguezais brasileiros e um importante recurso pesqueiro para comunidades tradicionais no nordeste do Brasil. Com o objetivo de contribuir com o conhecimento sobre a espécie, o presente estudo avaliou as curvas de crescimento em largura de carapaça e em peso, o crescimento relativo do peso pela largura da carapaça e a variação temporal dos índices gonadossomático e hepatossomático para a espécie. Um total de 524 caranguejos foram coletados em área de manguezal no município de Ubatuba, estado de São Paulo. Os parâmetros das curvas de crescimento e a longevidade (tmax) foram estimados para machos (CW∞=50,6 mm, WE∞=56,4 g, k=2,24, t0=0,003631502 ano-1, tmax=1,3 anos) e fêmeas (CW∞=50,7 mm, WE∞=58,8 g, k=2,50, t0=0,003247209 ano-1, tmax=1,2 anos). A idade no início da maturidade sexual foi de 0,23 anos para ambos os sexos. O modelo de crescimento em peso foi isométrico para indivíduos em estágios de desenvolvimento imaturos e alométrico negativo para adultos. A espécie exibiu reprodução contínua com picos reprodutivos nos meses de primavera e verão. A dinâmica de peso das gônadas e hepatopâncreas não estiveram claramente relacionadas. Os padrões de crescimento e reprodução indicaram que Goniopsis cruentata possui uma história de vida que prioriza a reprodução em detrimento da sobrevivência. A espécie exibiu algumas das maiores taxas de cresci mento e menores estimativas de longevidade relatados para espécies de braquiúros no Brasil. Goniopsis cruentata is a common semi-terrestrial crab in Brazilian mangroves and an important fishery resource for traditional communities in the northeastern Brazilian coast. Aiming to contribute to the knowledge about the species, this study evaluated the carapace width and weight growth curves, the relative growth of weight versus carapace width, and the temporal variation of gonadosomatic and hepatosomatic indices for the species. A total of 524 crabs were collected in a mangrove area of Ubatuba municipality, state of São Paulo. The growth-curves parameters and longevity (tmax) were estimated for males (CW∞=50.6 mm, WE=56.4 g, k=2.24, t0=0.003631502 year-1, tmax=1.3 years) and females (CW∞=50.7 mm, WE∞=58.8 g, k=2.50, t0=0.003247209 year-1, tmax=1.2 years). The age at onset of sexual maturity was 0.23 years for both genders. The weight-growth model was isometric for the immature developmental stages and allometric negative for adults. The species exhibited a continuous reproduction, with breeding peaks in spring and summer months. The weight dynamics of gonads and hepatopancreas were not clearly related. The growth and reproductive patterns indicated that Goniopsis cruentata has a life-history that prioritizes reproduction instead of survival. The species exhibited some of the highest growth rates and lowest longevity estimates reported for brachyuran species in Brazil. [Taddei, Fabiano G.] Universidade do Estado do Amazonas, Brazil Reis, Carla R.G.; Cobo, Valter J.] Universidade de Taubaté, Brazil

Made available in DSpace on 2019-09-12T16:32:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2013 In order to better understand the ecology of the different growth phases of the stone crab, Menippe nodifrons, and provide information for conservation of the natural stocks, this study describes the utilization of different biogenic substrates by this species in the intertidal zone. Sampling was carried out by hand at Ubatuba, State of Sao Paulo, Brazil. Crabs were captured among rocks or in association with three different biogenic substrates: Phragmatopoma lapidosa, Sargassum cymosum and Schizoporella unicornis. In the laboratory, the substrates were sorted and scanned for specimens of M. nodifrons, which were separated and measured at their maximum carapace width (CW), and classified as juvenile or adult specimens. Sex ratio and size distribution of crabs were analyzed for each of the substrate types. A total of 686 specimens of M. nodifrons were obtained during the sampling, ranging in size between 2.4 and 82.5 mm CW. Different mean sizes were recorded in the different substrates (P < 0.05). The high prevalence of juveniles in the samples suggests that these microhabitats are fundamental for the juvenile development of M. nodifrons, as they provide refuge, protection and probably food for juveniles. Para comprender mejor la ecología de las diferentes fases de crecimiento de los cangrejos de piedra, Menippe nodifrons, y proporcionar información para la conservación de sus poblaciones naturales, se describe la utilización de los diferentes sustratos biogénicos, para esta especie en la zona intermareal. El muestreo se efectuó en Ubatuba, Estado de Sao Paulo, Brasil. Los cangrejos fueron capturados entre las rocas o en asociación con tres diferentes sustratos biogénicos: Phragmatopoma lapidosa, Sargassum cymosum y Schizoporella unicornis. En el laboratorio, los sustratos se clasificaron y analizaron en busca de especímenes de M. nodifrons, que fueron separados y medidos en el ancho máximo del caparazón (CW), y se clasificaron como juveniles o adultos. La proporción de sexos y la distribución de tamaño de los cangrejos se analizó para cada uno de los tipos de sustrato. Se obtuvo un total de 686 ejemplares de M. nodifrons, que variaron entre 2,4 y 82,5 mm CW. Se registraron tamaños medios significativamente diferentes en los distintos sustratos (P < 0,05). El alto número de juveniles en las muestras sugiere que estos microhábitats son fundamentales para el desarrollo juvenil de M. nodifrons, ya que proporcionan refugio, protección y, probablemente, alimentación para estos juveniles. [Fransozo, Vivian] Universidade Estadual do Sudoeste da Bahia, Brazil Bertini, Giovana] Universidade Estadual Paulista, Brazil Rodrigues-Alves, Douglas Fernandes; Barros-Alves, Samara de Paiva; Fransozo, Vivian; Bertini, Giovana; Cobo, Valter José] Universidade Estadual Paulista, Brazil Cobo, Valter José] Universidade de Taubaté, Brazil

Made available in DSpace on 2019-09-11T20:58:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2013 Os principais objetivos deste estudo foram descrever a estrutura da comunidade de caranguejos anomuros e braquiúros que habitam recifes constituídos por colônias de Schizoporella unicornis, e fornecer uma ordenação das espécies mais importantes para esta comunidade. As coletas foram realizadas bimestralmente desde maio de 2003 até maio de 2004, no infralitoral rochoso da costa sudeste brasileira. A abundância e ocorrência relativas foram usadas para ordenar estas espécies em hierarquia de importância. Obteve-se um total de 2.018 indivíduos, distribuídos em 11 famílias, 22 gêneros e 31 espécies. Porcellanidae e Pilumnidae foram as famílias mais abundantes, compreendendo, respectivamente, cerca de 60% e 15% dos indivíduos amostrados. A ordenação das espécies indicou quatro grupos principais A, B, C e D, sendo o grupo A subdividido em dois. O subgrupo A1 contém 9 espécies, incluindo as espécies de maior importância ecológica para a comunidade, com relação à abundância e ocorrência. A grande abundância de caranguejos encontrados associados com S. unicornis é resultado de sua importância reconhecida durante o ciclo de desenvolvimento, e como abrigo e alimento para algumas espécies de decápodos. Estas observações revelam a importância de conservar as áreas ocupadas por essas colônias de briozoários, que parece ser um ambiente importante para a manutenção da biodiversidade local. The main goals of this investigation were to describe the community structure of anomuran and brachyuran crabs inhabiting reefs constituted by colonies of Schizoporella unicornis, and to provide a species importance ranking for this community. Collections were carried out on S. unicornis reefs at two-month intervals from May 2003 to May 2004, in the rocky sublittoral of the southeastern Brazilian coast. Relative abundance and occurrence were used to rank these species in the hierarchy importance. A total of 2,018 individuals were obtained, in 11 families, 22 genera and 31 species. Porcellanidae and Pilumnidae were the most abundant families, comprising respectively almost 60% and 15% of individuals sampled. The species ranking indicated four main groups A, B, C and D, with group A subdivided. Subgroup A1 contained 9 species, including the species of greatest ecological importance for community regarding abundance and occurrence. The great abundance of crabs associated with S. unicornis seems to be the result of its recognized importance during the crab developmental cycle, and as shelter and food for some Decapod species. These observations reveal the importance of conserving the areas occupied by these reef colonies, which appear to be an important environment for maintaining local biodiversity. [ALVES, DOUGLAS F.R.; BARROS-ALVES, SAMARA P.; LIMA, DANIEL J.M.; COBO, VALTER J.] Universidade de Taubaté, Brazil ALVES, DOUGLAS F.R.; BARROS-ALVES, SAMARA P.; LIMA, DANIEL J.M.; COBO, VALTER J.; NEGREIROS-FRANSOZO, MARIA LUCIA] Universidade Estadual Paulista, Brazil ALVES, DOUGLAS F.R.; BARROS-ALVES, SAMARA P.; LIMA, DANIEL J.M.; NEGREIROS-FRANSOZO, MARIA LUCIA] Universidade Estadual Paulista, Brazil

Made available in DSpace on 2013-09-27T16:24:20Z (GMT). No. of bitstreams: 1 ZOORECZOOR14906022863.pdf: 1746143 bytes, checksum: b0f3b7658aa4eafb45b5bd2d8af09ec9 (MD5) Previous issue date: 2012-01-01 Made available in DSpace on 2013-09-30T19:25:13Z (GMT). No. of bitstreams: 1 ZOORECZOOR14906022863.pdf: 1746143 bytes, checksum: b0f3b7658aa4eafb45b5bd2d8af09ec9 (MD5) Previous issue date: 2012-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:34:59Z No. of bitstreams: 1 ZOORECZOOR14906022863.pdf: 1746143 bytes, checksum: b0f3b7658aa4eafb45b5bd2d8af09ec9 (MD5) Made available in DSpace on 2014-05-20T15:34:59Z (GMT). No. of bitstreams: 1 ZOORECZOOR14906022863.pdf: 1746143 bytes, checksum: b0f3b7658aa4eafb45b5bd2d8af09ec9 (MD5) Previous issue date: 2012-01-01 Biodiversity can be useful as an ecosystem indicator for conservation and monitoring, through continuous assessment of its main properties including stability, primary productivity, exploitation tolerance and even global environmental changes. The main purpose of this study was to provide a checklist of the crabs associated with subtidal rocky bottoms at the Vitoria Archipelago, southeastern Brazilian coast. Monthly collections were carried out from February 2004 through January 2006 on three islands at the Vitoria Archipelago (23[degree]44'S-45[degree]01'W). The crabs were hand-caught by SCUBA divers during the daytime, in rock subtidal. A total of 3084 individuals were caught, belonging to 42 species, 28 genera, and 12 families, highlighting Mithraculus forceps (1528) and Stenorhynchus seticornis (407) representing more than 60% of the sample. on the other hand, Dromia erythropus, Moreiradromia antilensis, Ebalia stimpsoni, Garthiope spinipes and Tumidotheres maculatus had only one individual sampled. Univ Estadual Paulista UNESP, Inst Biociencias Botucatu, Dist Rubiao Jr S-N, Botucatu, SP, BR-18618970 BC, Brazil Univ Estadual Paulista UNESP, Inst Biociencias Botucatu, Dist Rubiao Jr S-N, Botucatu, SP, BR-18618970 BC, Brazil

Made available in DSpace on 2019-09-12T16:56:49Z (GMT). No. of bitstreams: 0 Previous issue date: 2012 This study provides information on the community structure of brachyuran crabs associated with the green sponge, Amphimedon viridis Duchassaing & Michelotti, 1864, from a beach on the south-eastern coast of Brazil. Monthly collections from May 2002 through August 2003 were carried out on the rocky bottoms off Itagua Beach (23 degrees 27'07 '' S 45 degrees 02'49 '' W). Crabs on the green sponge banks were hand-caught during snorkelling sessions, and 638 crabs belonging to 31 species, 19 genera, and 10 families were obtained. Biological parameters, including sponge volume, number of individuals, density, richness, diversity, evenness, and dominance changed considerably over time. Species recruitment and foraging habit are some of the factors that drive the richness, dominance, and diversity patterns of this community. The green sponge banks are important sites for recruitment, refuge, and feeding of many species of brachyurans. Therefore, they are also important for the conservation of this group on the south-eastern coast of Brazil. [Alves, Douglas F. R.; Barros-Alves, Samara De P.] Univ Estadual Paulista, UNESP, Inst Biociencias Botucatu, Postgrad Course Zool, BR-18618970 Botucatu, SP, Brazil [Alves, Douglas F. R.; Barros-Alves, Samara De P.; Cobo, Valter J.] Univ Estadual Paulista, UNESP, NEBECC, Grp Studies Crustacean Biol Ecol & Culture, BR-18618970 Botucatu, SP, Brazil [Carvalho, Marcelo C. R.; Cobo, Valter J.] Universidade de Taubaté (Unitau), , LabBMar Marine Biol Lab, BR-12030180 Taubate, SP, Brazil

Made available in DSpace on 2014-09-30T18:18:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-01Bitstream added on 2014-10-01T14:03:30Z : No. of bitstreams: 1 S0104-64972012000100006.pdf: 506797 bytes, checksum: 78ab23439d0b697acd18d0916f1dbd2e (MD5) The geographical distribution of marine organisms, as a result of complex natural processes through geological time, has been changed, sometimes drastically, by species introductions. Instances of species introduction have been recorded worldwide, and the Brazilian coast is no exception. The present review provides an update of the geographical distribution of members of the brachyuran subfamily Mithracinae along the Brazilian coast. Of the 30 species of this subfamily recorded from Brazilian waters, the known geographical limits of more than 17 have been extended in recent decades. The records compiled here demonstrate the great importance of the Amazon River outflow on the geographical distribution of members of Mithracinae, acting as a biogeographical barrier for some species. Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia Universidade Estadual de Londrina Departamento de Biologia Animal e Vegetal Universidade de Taubaté Instituto de Biociências Laboratório de Biologia Marinha Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia

Made available in DSpace on 2019-09-12T16:26:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2011 This study aimed to describe the species composition and abundance of the porcellanid crabs inhabiting the consolidated sublittoral off an island on the southeastern coast of Brazil. During a sampling program at Vitória Island (23º44'S, 45º01'W), collections were carried out monthly from February 2004 through January 2006. The crabs were hand-caught by SCUBA divers during the daytime. The greatest carapace width (CW) was measured, and the sex and developmental stage were identified for each crab. The specimens were grouped into five demographic categories: juvenile males, adult males, juvenile females, adult females, and ovigerous females. A total of 275 crabs belonging to three genera and six species were obtained. Petrolisthes amoenus (Guérin-Méneville, 1855) and Pachycheles riisei (Stimpson, 1858) were the most abundant species. Most of the demographic classes were represented for both species, except that no adult females of P. riisei were recorded. Among the porcellanids, Pachycheles monilifer (Dana, 1852) was the dominant species; it comprised more than 75% of the total individuals sampled, and showed the highest constancy index for the region. The results obtained in this study provided information regarding the faunal composition and the relative abundance of the species, which will be useful as a reference for other sublittoral consolidated-bottom regions along the southeast Brazilian coast. [Alves, Douglas F. R.; Barros-Alves, Samara de P.; Cobo, Valter J.] Universidade de Taubaté, Brazil

Made available in DSpace on 2019-09-12T16:53:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2009 Universidade de Taubaté (Unitau) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Produção reprodutiva do caranguejo-aranha Epialtus bituberculatus , que está associada a leitos da alga Sargassum cymosum, foi avaliada. As coletas foram realizadas mensalmente de janeiro a dezembro de 2001 no intertidal de duas praias (Grande e Domingas Dias) na costa subtropical do sudeste brasileiro. A largura da carapaça de fêmeas ovígeras foi medida e seus ovos contados. Uma subamostra de cinco ovos foi retirada de cada lote e seu volume medido e o estágio de desenvolvimento embrionário identificado. Foram estimados o índice de fecundidade (FI) e o índice de intensidade reprodutiva (RII). No total, foram obtidas 281 fêmeas ovígeras, 108 e 173 nas praias Grande e Domingas Dias, respectivamente. A produção de ovos era função do tamanho dos caranguejos. A fecundidade foi significativamente diferente entre os dois locais. Indivíduos da população da praia de Domingas Dias apresentaram maior fecundidade média e maiores picos de RII em comparação aos caranguejos da praia Grande. Diferenças significativas no volume dos ovos foram detectadas entre os estágios embrionários inicial e final, em ambas as praias. A tendência geral para a estratégia de produção de ovos deE. bituberculatus segue o padrão para espécies tropicais e subtropicais de braquiúra, aumentando com o tamanho do corpo. As diferenças registradas no presente estudo podem ser causadas por fatores ambientais como a hidrodinâmica, que são bastante diferentes entre as duas praias, sugerindo que isso pode ter importância na determinação da produção reprodutiva desta espécie. The reproductive output of the spider crab Epialtus bituberculatus, which is associated with beds of the alga Sargassum cymosum, was evaluated. Collections were carried out monthly from January through December 2001 in the intertidal of two beaches (Grande and Domingas Dias) on the subtropical southeastern Brazilian coast. The carapace width of ovigerous females was measured and their eggs were counted. A subsample of five eggs was taken from each batch and their volume measured and the stage of embryonic development identified. The fecundity index (FI), and reproductive intensity index (RII), were estimated. In total, 281 ovigerous females were obtained, 108 and 173 from Grande and Domingas Dias beaches, respectively. The egg production was a function of the size of the crabs. The fecundity was significantly different between the two sites. Individuals from the Domingas Dias beach population had a larger average fecundity and greater peaks of RII in comparison to the crabs at Grande beach. Significant differences in egg volume were detected between early and late embryonic stages, at both beaches. The general trend for the egg-production strategy of E. bituberculatus follows the pattern for tropical and subtropical brachyuran species, increasing with body-size. The differences recorded in the present study might be caused by environmental factors such as hydrodynamics, which are quite different between the two beaches, suggesting that this may have importance in the determining the reproductive output of this species. [Cobo, Valter Jose; Barros, Samara de P.] Universidade de Taubaté (Unitau), , Dept Biol, NEBECC Study Grp Crustacean Biol Ecol & Culture, BR-12030180 Taubate, SP, Brazil [Cobo, Valter Jose] Universidade de Taubaté (Unitau), , Dept Biol, LABBMAR Lab Biol Marinha, BR-12030180 Taubate, SP, Brazil [Barros, Samara de P.] UNESP, Dept Zool, Inst Biociencias, Botucatu, SP, Brazil

Relative growth can be understood as a morphometric relationship of body parts with the body as a whole, described by a mathematic equation. This study provides information on the patterns of relative growth of Mithrax tortugae from Vitoria Island, southeastern Brazilian coast (23°44′04″S 45°01′35″W). Crabs were obtained from monthly collections by hand during SCUBA diving, between January 2004 and February 2007. A total of 168 crabs was obtained, 64 males and 104 females. Regression analysis was performed among carapace width (CW), as the independent variable, and carapace length (CL), abdomen width (AW), height high and length of the propodus (PH and PL), and gonopod length (GL) as dependent variables, using the power function y = a x b . Young males showed positive allometry with regard to gonopod growth. Abdomen growth of juvenile females was also positively allometric. The growth patterns recorded for M. tortugae are associated with the species reproductive strategy, i.e., preparation of body parts involved in gamete transfer and egg clutch storage, like the male gonopods and the female abdomen. According to the results obtained, morphological maturity is attained at 12.95 mm CW for males and at 22.40 mm CW for females. The general patterns shown by M. tortugae are similar to the model adopted for Brachyura in general. Crescimento relativo pode ser entendido como a analise das relacoes entre dimensoes de partes do corpo em funcao do corpo como um todo, descrita por uma equacao matematica. Este estudo fornece informacoes sobre os padroes de crescimento relativo do Mithrax tortugae , de uma populacao da Ilha da Vitoria, sudeste do litoral brasileiro (23°44′04″S 45°01′35″W). Os caranguejos foram obtidos manualmente, a partir de coletas mensais, por meio de mergulho autonomo, entre janeiro de 2004 e fevereiro de 2007. Um total de 168 caranguejos foi obtido, 64 machos e 104 femeas. Foram executadas regressoes entre a largura da carapaca (LC), variavel independente e o comprimento da carapaca (CC), largura do abdomen (LA) e altura e comprimento do propodo quelar (APQ e CPQ), como variaveis dependentes, aplicando a funcao potencia y = a x b . Os machos jovens apresentaram alometria positiva para o crescimento do gonopodio. Enquanto que para nas femeas jovens foi registrado um padrao alometrico positivo para o crescimento do abdomen. Os padroes de crescimento registrados para M. tortugae estao associados com a estrategia reprodutiva da especie, ou seja, a preparacao das partes do corpo envolvidas com a transferencia de gametas e a incubacao dos ovos, como os gonopodios para os machos e o abdomen para as femeas. De acordo com os resultados obtidos, a maturidade morfologica e atingida em 12,95 mm LC para os machos e em 22,40 mm LC para as femeas. Os padroes gerais demonstrados por M. tortugae seguem o modelo geral descrito para os Brachyura.

Made available in DSpace on 2019-09-11T20:58:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2008 A fecundidade é um dos parâmetros mais importantes no estudo do potencial reprodutivo dos decápodes Pleocyemata, em especial por sua relação com a reposição de indivíduos na população. Informações acerca da fecundidade providenciam elementos importantes para a compreensão das estratégias reprodutivas, dinâmica e desenvolvimento de uma determinada população. Este trabalho estudou a fecundidade, tamanho dos ovos, perda de ovos durante a incubação e as relações entre a fecundidade e alguns determinados fatores ambientais para o caranguejo-aranha Mithraculus forceps (A. Milne Edwards, 1875). Fêmeas ovígeras foram amostradas de janeiro a dezembro de 2000, por meio de mergulho autônomo, na região da Ilha das Couves (23º25'25"S, 44º52'03"W), litoral norte do Estado de São Paulo, Brasil. Foi capturado um total de 68 fêmeas ovígeras, das quais 40 com ovos em estágio inicial de desenvolvimento e 28 com ovos em estágio final. A fecundidade média para o total de massas de ovos analisadas foi de 402,8 ± 240,1 ovos, variando de 60 a 1123 ovos. O tamanho das fêmeas variou de 9,4 a 14,0 mm de largura de carapaça. O tamanho médio dos ovos foi de 0,56 ± 0,06 mm de diâmetro. Foi estimada uma taxa de 23,33% de perda de ovos durante a incubação por meio da comparação do número médio de ovos em estágios inicial e final de desenvolvimento. Não foi possível detectar correlação entre a fecundidade de M. forceps e a variação dos valores de temperatura e salinidade. A exemplo do que se observa para a maior parte das espécies de Brachyura, M. forceps também é caracterizado por apresentar uma relação bastante conservativa entre o tamanho do corpo e o número de ovos produzidos por desova. Fecundity is one of the most important parameters in studying the reproductive output of Pleocyemata decapods, especially because of its relationship to the efficiency of population replacement. Knowledge of fecundity provides basic elements for understanding the reproductive strategies, dynamics, and evolution of a given population. The present investigation provides informations on fecundity, egg size, egg loss, and the relationship between fecundity and selected environmental features, for the spider crab Mithraculus forceps (A. Milne Edwards, 1875). Ovigerous crabs were collected each month during 2000, by SCUBA diving, at Couves Island (23º25'25"S, 44º52'03"W) on the northeastern coast of the state of São Paulo, Brazil. A total of 40 ovigerous females with egg in early development (initial stage) and 28 final stage eggs were obtained and analyzed. Mean fecundity, from eggs of the initial stage, was 402.8 ± 240.1 eggs, ranging from 60 to 1,123 eggs. Sizes of females ranged from 9.4 to 14.0 mm carapace width. Mean egg size was 0.56 ± 0.06 mm diameter. A 20.33% rate of egg loss was estimated by comparing the fecundities of batches of eggs in early and late development (40 initial batches and 28 final stages batches). There were no significant relationships between the water temperature or salinity and variations in fecundity. As in most brachyuran species, M. forceps showed a strong conservative relationship between fecundity and body size. [Cobo, Valter J.; Okamori, Claudia M.] Universidade de Taubaté, Brazil

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:06:31Z No. of bitstreams: 1 S0037-86822006000500015.pdf: 95300 bytes, checksum: 4f3d99ecdfee12d363d335c182c0c0bb (MD5) Made available in DSpace on 2013-08-22T19:06:31Z (GMT). No. of bitstreams: 1 S0037-86822006000500015.pdf: 95300 bytes, checksum: 4f3d99ecdfee12d363d335c182c0c0bb (MD5) Previous issue date: 2006-10-01 Made available in DSpace on 2013-09-30T20:10:52Z (GMT). No. of bitstreams: 2 S0037-86822006000500015.pdf: 95300 bytes, checksum: 4f3d99ecdfee12d363d335c182c0c0bb (MD5) S0037-86822006000500015.pdf.txt: 11482 bytes, checksum: 4eb146b62b8bad4b6ba76a9a27967862 (MD5) Previous issue date: 2006-10-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:18:01Z No. of bitstreams: 2 S0037-86822006000500015.pdf: 95300 bytes, checksum: 4f3d99ecdfee12d363d335c182c0c0bb (MD5) S0037-86822006000500015.pdf.txt: 11482 bytes, checksum: 4eb146b62b8bad4b6ba76a9a27967862 (MD5) Made available in DSpace on 2014-05-20T15:18:01Z (GMT). No. of bitstreams: 2 S0037-86822006000500015.pdf: 95300 bytes, checksum: 4f3d99ecdfee12d363d335c182c0c0bb (MD5) S0037-86822006000500015.pdf.txt: 11482 bytes, checksum: 4eb146b62b8bad4b6ba76a9a27967862 (MD5) Previous issue date: 2006-10-01 Os moluscos do gênero Conus apresentam um aparato venenoso composto de uma rádula quitinosa ligada a glândulas de peçonha, causando envenenamentos humanos graves e mesmo óbitos pela ação neurotóxica indutora do bloqueio de vários receptores e paralisia muscular. Não há casos descritos de envenenamento no país, mas determinadas populações correm risco de acidentes. Mollusks of the genus Conus present a venomous apparatus composed of radulae, a chitin structure linked to glands, which injects potent neurotoxic peptides, causing serious human envenomation and even death, associated with the blockage of certain receptors and muscular paralysis. No reported envenomation has occurred in Brazil, but certain populations are at risk of accidents. Universidade Estadual Paulista Faculdade de Medicina de Botucatu Instituto Butantan Hospital Vital Brazil Programa de Assistência à AIDS Universidade de Taubaté Departamento de Biologia Universidade Estadual Paulista Faculdade de Medicina de Botucatu

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:54:47Z No. of bitstreams: 1 S0101-81752005000400037.pdf: 659241 bytes, checksum: a0ab69916dafddeb0924d91116ace2af (MD5) Made available in DSpace on 2013-08-22T18:54:48Z (GMT). No. of bitstreams: 1 S0101-81752005000400037.pdf: 659241 bytes, checksum: a0ab69916dafddeb0924d91116ace2af (MD5) Previous issue date: 2005-12-01 Made available in DSpace on 2013-09-30T19:46:52Z (GMT). No. of bitstreams: 2 S0101-81752005000400037.pdf: 659241 bytes, checksum: a0ab69916dafddeb0924d91116ace2af (MD5) S0101-81752005000400037.pdf.txt: 27025 bytes, checksum: 323a5d4517f634ccc4e3528fd998ac88 (MD5) Previous issue date: 2005-12-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:53:56Z No. of bitstreams: 2 S0101-81752005000400037.pdf: 659241 bytes, checksum: a0ab69916dafddeb0924d91116ace2af (MD5) S0101-81752005000400037.pdf.txt: 27025 bytes, checksum: 323a5d4517f634ccc4e3528fd998ac88 (MD5) Made available in DSpace on 2014-05-20T13:53:56Z (GMT). No. of bitstreams: 2 S0101-81752005000400037.pdf: 659241 bytes, checksum: a0ab69916dafddeb0924d91116ace2af (MD5) S0101-81752005000400037.pdf.txt: 27025 bytes, checksum: 323a5d4517f634ccc4e3528fd998ac88 (MD5) Previous issue date: 2005-12-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) A biologia populacional de Exhippolysmata oplophoroides (Holthuis, 1948) foi estudada na enseada de Ubatuba (23º26'S, 45º02'W), Ubatuba, São Paulo, Brasil, de setembro de 1995 até agosto de 1996. Cada amostragem compreendeu oito transectos (14000 m² cada), amostrados mensalmente com três repetições. Os espécimes foram classificados quanto à presença ou ausência de ovos nos apêndices abdominais. Os camarões espinhos ocorreram somente em seis transectos, sendo mais abundantes no transecto II, com a maior incidência no final da primavera e ao longo dos meses de verão. Indivíduos ovígeros e não ovígeros estiveram presentes o ano todo, numa proporção semelhante a 1:1. O transecto II é caracterizado por altos valores de salinidade e oxigênio, temperatura entre 26 e 29º C, baixo teor de matéria orgânica e sedimento composto por areia muito fina. Tais características biológicas e ambientais permitem o estabelecimento e a manutenção da população de E. oplophoroides na região de estudo. The population biology of Exhippolysmata oplophoroides (Holthuis, 1948) was studied in Ubatuba Bay (23º26'S, 45º02'W), Ubatuba, São Paulo, Brazil, from September/1995 to August/1996. Each sampling comprised eight transects (14 000 m² each), sampled monthly with three repetitions. The specimens were classified with respect to the presence or absence of eggs in the abdominal appendages. Spine-shrimps occurred only on six transects, being most abundant on transect II, with the highest incidence in late spring and throughout the summer months. Ovigerous and non-ovigerous shrimps were present year-round, in an approximately similar proportion (1:1). Site II in Ubatuba Bay is characterized by high salinity and oxygen values, temperature between 26 and 29ºC, low organic matter content in the sediment, and a bottom composed of very fine sand; these environment and biological features allow the establishment and maintenance of the population of E. oplophoroides. Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia Universidade Estadual Paulista Faculdade de Ciências Universidade Estadual Paulista Universidade de Taubaté Departamento de Biologia Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia Universidade Estadual Paulista Faculdade de Ciências Universidade Estadual Paulista

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:54:45Z No. of bitstreams: 1 S0101-81752005000100027.pdf: 488900 bytes, checksum: 44cea7d2a2b67a6bbb5720985de8c365 (MD5) Made available in DSpace on 2013-08-22T18:54:45Z (GMT). No. of bitstreams: 1 S0101-81752005000100027.pdf: 488900 bytes, checksum: 44cea7d2a2b67a6bbb5720985de8c365 (MD5) Previous issue date: 2005-03-01 Made available in DSpace on 2013-09-30T19:46:47Z (GMT). No. of bitstreams: 2 S0101-81752005000100027.pdf: 488900 bytes, checksum: 44cea7d2a2b67a6bbb5720985de8c365 (MD5) S0101-81752005000100027.pdf.txt: 19098 bytes, checksum: a9fce7e833b9a6a1397b1dfe5e15db34 (MD5) Previous issue date: 2005-03-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:12:26Z No. of bitstreams: 2 S0101-81752005000100027.pdf: 488900 bytes, checksum: 44cea7d2a2b67a6bbb5720985de8c365 (MD5) S0101-81752005000100027.pdf.txt: 19098 bytes, checksum: a9fce7e833b9a6a1397b1dfe5e15db34 (MD5) Made available in DSpace on 2014-05-20T15:12:26Z (GMT). No. of bitstreams: 2 S0101-81752005000100027.pdf: 488900 bytes, checksum: 44cea7d2a2b67a6bbb5720985de8c365 (MD5) S0101-81752005000100027.pdf.txt: 19098 bytes, checksum: a9fce7e833b9a6a1397b1dfe5e15db34 (MD5) Previous issue date: 2005-03-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Este trabalho fornece informações sobre as relações entre a maturidade sexual e o crescimento do caranguejo Goniopsis cruentata (Latreille, 1803). Durante o período de janeiro de 1995 a dezembro de 1996 foram realizadas coletas mensais na região de Ubatuba, litoral norte do Estado de São Paulo. Os animais capturados foram reunidos em quatro grupos de interesse: macho jovem, macho adulto, fêmea jovem e fêmea adulta, em que estão incluídas as ovígeras. Para cada animal foi mensurada a largura da carapaça (LC) e anotadas a condição de muda e o estágio do desenvolvimento gonadal. A maturidade fisiológica foi observada entre 21.4 e 23.7mmLC para ambos os sexos. A população amostrada apresentou atividade de muda em todas as classes de tamanho durante todo o período estudado, o que sugere o estabelecimento de um padrão de crescimento contínuo e ausência de anecdise terminal para essa espécie. Esse fato pode estar associado com a habilidade desses animais em copular durante a intermuda, gerando uma grande quantidade de indivíduos maduros durante todo o ano, garantindo a continuidade do processo reprodutivo. This investigation provided information on the physiological sexual maturity and relationships of growth and reproduction in Goniopsis cruentata (Latreille, 1803). Collections were made monthly from January 1995 through December 1996, on the northeastern coast of São Paulo State, Brazil. The crabs were grouped into juvenile males; adult males; juvenile females, and adult females, including ovigerous ones. For each specimen the carapace width (CW) was measured, and molt condition and macroscopic developmental stage of the gonad tissue were recorded. CWs of physiologically mature crabs were between 21.4 and 23.7 mm for both sexes. This population showed molt activity in all size groups throughout the study period, which suggests continuous growth and the absence of terminal anecdysis. This may be associated with the ability of these animals to copulate during the intermolt, supplying a high proportion of mature individuals over time and ensuring continuity of reproduction year-round. Universidade de Taubaté Instituto Básico de Biociências Laboratório de Biologia Marinha Universidade Estadual Paulista Departamento de Zoologia Universidade Estadual Paulista Departamento de Zoologia