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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...

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

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

[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. ]

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

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

Made available in DSpace on 2013-08-12T18:13:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-03-01 Made available in DSpace on 2013-09-30T18:36:18Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-03-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:48:41Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T13:48:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-03-01 O objetivo deste trabalho é identificar os itens alimentares que compõem a dieta de L. spinosa, por meio da análise do conteúdo estomacal. Os caranguejos foram coletados no litoral norte paulista (23º25’S–45º00’W). No laboratório, todos indivíduos foram dissecados, os estômagos foram retirados e fixados em formol 10%. Os itens alimentares foram identificados sob estereomicroscópio, sendo que para a análise foi utilizado o método Freqüência de Ocorrência. Foram analisados 194 estômagos, nos quais foram encontrados nove itens alimentares. A maior freqüência foi para material não identificado, ocorrendo em 98% dos estômagos analisados e Porifera foi o item com a menor freqüência, ocorrendo em menos de 1% dos estômagos. Com base nos resultados obtidos, sugere-se que o caranguejo L. spinosa apresenta uma dieta diversificada, sugerindo a utilização de diferentes métodos para a obtenção de alimento e por conseqüência podendo ocupar vários níveis na cadeia trófica. The main goal of this study was the identification of the items of the diet of the L. spinosa, based on the stomach contents analysis. The crabs were obtained from Ubatuba region north-eastern shore of São Paulo State. In the laboratory, all the individuals were dissected, the stomach was retreated and fixed in 10% formaline. The alimentary items were identified under stereomicroscope and analysed by the method of Frequency of Occurrence. A total of 194 stomachs was analysed and nine alimentary items were obtained. Unindentified material was found in 98% of analysed stomach and poriferan were present in less then 1% of stomachs. These results pointed a diversified diet explored by this crab, as well as the employment of some different methods for food intake. This suggested that these crabs could occupy different position in the trophic chain. Univ Taubate UNITAU, Inst Basico Biociencias, Lab Biol Marinha, BR-12030180 Taubate, SP, Brazil UNESP, Dept Bot & Zool, BR-18600000 Botucatu, SP, Brazil UNESP, Dept Bot & Zool, BR-18600000 Botucatu, SP, 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

Made available in DSpace on 2021-07-14T10:43:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-06. Added 1 bitstream(s) on 2021-07-14T11:36:40Z : No. of bitstreams: 1 S0101-81752003000200007.pdf: 143202 bytes, checksum: fa4fcee372f1e545f73923e6ce051dfc (MD5) This study evaluated the influence of the water and air temperatures, pluviosity and photoperiod on the breeding season of Goniopsis cruentata (Latreille, 1803), in Ubatuba littoral, southeastern Brazilian coast. Monthly collections were conducted out from January/95 to December/96 in an estuarine area from 23º29'10-23º29'45S to 45º09'10-45º10'00W. Water and air temperature variation showed the highest correlation coefficient with the frequency of ovigerous females, r² = 0.73 and 0.68, respectively. However, an analysis of the set of environmental variables, revealed the photoperiod as the factor of highest association with the ovigerous frequency (r² = 0.68). This degree of association allow us to suggest that the breeding season duration of G. cruentata might have some variations over different latitudes, and such results could be quite diverse in populations from different latitudes. Universidade de Taubaté, Departmento de Biologia Universidade Estadual Paulista, Instituto de Biociências Group of Studies on Crustacean Biology, Ecology and Culture Universidade Estadual Paulista, Instituto de Biociências

Made available in DSpace on 2019-09-12T16:53:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2003 The arrow crab Stenorhynchus seticornis (Brachyura, Majidae), is a common inhabitant of the rocky subtidal along the Brazilian coast. Fecundity and the influence of environmental variables on egg production are investigated in this study. Information on egg size and egg loss through incubation are also provided. Monthly samples were conducted using SCUBA diving, from January to December 1998 in the Ubatuba region (23degrees25'25"S-44degrees52'03"W), south-eastern Brazilian coast. Early broods were used for the estimation of size-specific relationships of fecundity Egg loss was assessed by comparing average egg numbers of early and late broods. The fecundity was estimated in 621.1 +/-339.6 eggs, with an average diameter of 0.48 +/-0.1 and 0.57 +/-0.1 unit for early and late eggs, respectively The number of eggs produced was apparently constant year-round. No significant differences were recorded among monthly fecundity values. The variation of abiotic factors did not show arty relationship with temporal variability of fecundity, suggesting that the environmental effect in egg production is slight at best. Universidade de Taubaté (Unitau), , Dept Biol, BR-12030010 Taubate, SP, Brazil

Made available in DSpace on 2019-09-11T20:58:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2002 Investigations concerning to the breeding period of brachyuran crabs provide fundamental information to determine their reproductive cycle, and also to establish management plans for species mainly in protected areas. This study provides data on the breeding period of M.forceps (A. Milne Edwards, 1875) in the southeastern Brazilian coast. Monthly samplings were carried out during a one year-round. A catch effort of approximately four hours was allocated to each monthly survey. The breeding intensity was determined based on the percentage of ovigerous crabs within the whole adult female population. A total of 137 adult females was obtained, from which 80.3% presented eggs attached on their pleopods. Ovigerous females were observed yearround, usually comprising more than 60% of sampled adult females. The ovigerous frequency was not statistically correlated to the environmental analyzed factors. [Cobo, Valter José] Universidade de Taubaté, Brazil

Made available in DSpace on 2019-09-12T16:53:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2002 This study focused on the breeding period of Stenorhynchus seticornis (Brachyura, Majidae, Inachinae) in the south-eastern Brazilian coast. Monthly collections were accomplished from January to December of 2000. A catch effort of approximately 4 h was allocated to each monthly survey. The breeding intensity was determined as the percentage of ovigerous crabs within the whole adult female population. A total of 204 adult females were obtained, from which 74.5% presented eggs attached to their pleopods. Ovigerous females were observed year-round, usually comprising more than 60% of sampled adult females. The ovigerous frequency was not found to be correlated with either temperature or salinity. , Dept Biol, Zool Lab, Grp Studies Crustacean Biol,NEBECC, BR-12030010 Taubate, SP, Brazil