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The population dynamics and reproduction of the hermit crab Clibanarius vittatus were evaluated on Pescadores Beach, located on the estuarine channel of São Vicente (São Paulo), Brazil. The hermit crabs were captured by hand during low tide, from May 2001 to April 2003. A total of 2554 hermit crabs were captured, of which 701 were males, 1741 non-ovigerous females, 48 ovigerous females and 64 intersex individuals. The size–frequency distribution of the males was represented by a platykurtic bell-shaped curve, which differed from the leptokurtic bell-shaped curve of the females. The smaller and intermediate classes were composed mainly of females (modal size 6.5–7.5 mm carapace shield length (CSL)), and the larger classes only by males (modal size 9.5–10.5 mm CSL). The overall sex-ratio was skewed toward females (0.39:1/M:F), differing significantly from the expected 1:1. A seasonal reproductive pattern was recorded for C. vittatus in this location, with more intensive reproductive activity in the warmer months. The absence of juveniles suggests that their recruitment area is different than the area inhabited by adults, possibly another area with more protection and specialized or different resources for young.

Made available in DSpace on 2022-04-28T20:51:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-02-01 Leeches exhibit a marked scope of diversity, including different kinds of symbiosis. The aim of the present study was to demonstrate through biochemical and histological analysis that a species of piscicolid leech, Myzobdella platensis, is a true parasite of blue crabs, feeding on their hemolymph and using them as a site for cocoon deposition. In a total of 48 blue crabs collected on October 2007 at 3 sites of the São Vicente Estuary, 12 specimens were infested with leeches. Callinectes bocourti (n = 7) was the most infested species with leeches and cocoons; it was chosen for biochemical and histological assays. The immunoblotting assays showed a positive reaction of the proteins in the intestinal samples of leeches collected from crabs using antihemocyanin polyclonal antibody of Ampullaria canaliculata. In addition, leech intestinal samples were recognized by antihemolymph polyclonal antibody of nonparasitized blue crabs. Histological sections of leech gut showed hemocytes and a granular matrix similar to those found in crab blood vessels. Collectively, this evidence strongly suggests a parasitic interaction between the leech M. platensis and the blue crab C. bocourti, in which the former utilizes the latter as a site for cocoon deposition and possibly for dispersal similar to that proposed for Myzobdella lugubris in Callinectes sapidus in North America. © 2009 American Society of Parasitologists. Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) Campus Experimental Do Litoral Paulista Unidade de São Vicente, Praça Infante D. Henrique, s/n., 11330-900, São Vicente SP Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) Campus Experimental Do Litoral Paulista Unidade de São Vicente, Praça Infante D. Henrique, s/n., 11330-900, São Vicente SP

[EN] The genus Callinectes Stimpson, 1860 currently consists of 16 species, six of which are reported in Brazilian coast. In the present study, the first zoeal stages of Callinectes bocourti, C. danae, C. exasperatus, C. ornatus and C. sapidus from Brazil were obtained from ovigerous females. The morphological and meristic characters of all these larval stages are described and illustrated. Those of C. bocourti, C. danae and C. sapidus are redescribed and compared with the previous descriptions, and differences are listed. Larval characters of these species were examined for interspecific differences, as well as larval features to distinguish the genus Callinectes within Portunidae. In addition, other portunid genera and species with a known first zoeal stage are compared, with special attention to those species present in the same geographical area. Our findings concord with some previous molecular studies, and we discuss the complexity within the group., [POR] O gênero Callinectes Stimpson, 1860 atualmente é composto por 16 espécies, seis das quais são registradas para a costa brasileira. No presente estudo foi obtido o primeiro estagio de zoea de Callinectes bocourti, C. danae, C. exasperatus, C. ornatus e C. sapidus a partir de fêmeas ovigeras coletadas no Brasil. Os caracteres morfológicos e merísticos de todas estas larvas foram descritos e ilustrados. Para C. bocourti, C. danae e C. sapidus tais estruturas foram redescritas e comparadas com descrições previas, listando-se as diferenças. Os caracteres larvais destas espécies foram verificados em busca de diferenças interespecíficas, bem como os aspectos larvais para distinguir o gênero Callinectes dentro de Portunidae. Em complemento, foram feitas comparações com outros gêneros e espécies de portunídeos, cujo primeiro estágio de zoea é conhecido, com atenção especial para aquelas espécies presentes na mesma área geográfica. Nossos achados corroboram estudos moleculares prévios e discutimos tal complexidade dentro do grupo., Additional support for this study was provided by grants given to FLM by the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) (Individual 1995/2833-0, 2002/08178-9; Temático Biota 2010/50188-8; Coleções Científicas 2009/54931-0) and the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (501706/2004-6; 472746/2004-9; 301359/2007-5; 473050/2007-2; 302748/2010-5; 471011/2011-8) and (111518/2004-0) to ACRG. Thanks to Dr. Janet Reid (JWR Associates) for providing the English review service and to anonymous reviewers for comments and suggestions.

The feeding activity along the day cycle and the time consumed for extracellular digestion were evaluated in the portunids C. ornatus and C. danae. Swimming crabs were obtained from trawling in Ubatuba bay, Sao Paulo, Brazil, during both the rainy and dry seasons. In each season, daily scheduled samples were taken at dawn (±6 h), noon (±12 h), dusk (±18 h) and midnight (±24 h). All individuals were dissected and the degree of stomach replenishment was recorded. In order to estimate the time elapsed for extracellular digestion, crabs were fed, and groups were dissected at 30 min intervals to check the conditions of their stomachs. In general, both species show a higher feeding activity during periods of lower light intensity, as evidenced by an increased percentage of full stomachs in dusk and midnight samples. The obtained results support higher feeding activity at night in these species and indicate short time for extracellular digestion, not exceeding 8 h. Nevertheless, full stomachs were recorded in all sampling schedules. In this case, it should be considered that elimination of certain food items such as fish bones, mollusk shells and carapace fragments of crustaceans could take more time than other items. Additionally, some crab species could require a cycle of cell replacement in the midgut gland epithelium until they can take their next meal.

The locomotory and feeding activity rhythms of Callinectes ornatus Ordway, 1863 and Callinectes danae Smith, 1869 were examined under laboratory conditions. Light significantly influenced the activity of these organisms. However, activity in both species was affected by the presence of food, independently of photoperiod regime.

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:57:59Z No. of bitstreams: 1 S0034-71082000000300013.pdf: 76295 bytes, checksum: 113124749ed0c4dbf5af9a0e41e91afc (MD5) Made available in DSpace on 2013-08-22T18:57:59Z (GMT). No. of bitstreams: 1 S0034-71082000000300013.pdf: 76295 bytes, checksum: 113124749ed0c4dbf5af9a0e41e91afc (MD5) Previous issue date: 2000-08-01 Made available in DSpace on 2013-09-30T19:53:16Z (GMT). No. of bitstreams: 2 S0034-71082000000300013.pdf: 76295 bytes, checksum: 113124749ed0c4dbf5af9a0e41e91afc (MD5) S0034-71082000000300013.pdf.txt: 21199 bytes, checksum: 6cdd3eebcd6a79109520988a7b549ced (MD5) Previous issue date: 2000-08-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:13:50Z No. of bitstreams: 2 S0034-71082000000300013.pdf: 76295 bytes, checksum: 113124749ed0c4dbf5af9a0e41e91afc (MD5) S0034-71082000000300013.pdf.txt: 21199 bytes, checksum: 6cdd3eebcd6a79109520988a7b549ced (MD5) Made available in DSpace on 2014-05-20T15:13:50Z (GMT). No. of bitstreams: 2 S0034-71082000000300013.pdf: 76295 bytes, checksum: 113124749ed0c4dbf5af9a0e41e91afc (MD5) S0034-71082000000300013.pdf.txt: 21199 bytes, checksum: 6cdd3eebcd6a79109520988a7b549ced (MD5) Previous issue date: 2000-08-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Este estudo visou a análise do ciclo reprodutivo do caranguejo Hepatus pudibundus (Herbst, 1785). Os caranguejos foram coletados na região de Ubatuba, SP (23°26'S e 45°02'W), mensalmente no período de junho de 1992 a julho de 1993. As coletas foram realizadas com o auxílio de um barco de pesca equipado com rede do tipo otter trawl. em laboratório, os animais foram contados, sexados, mensurados (maior largura da carapaça) e tiveram seu estágio gonad e o de muda macroscopicamente determinados. Além da ocorrência de fêmeas ovígeras em todos os meses de coleta, foi também observada a presença de animais com as gônadas desenvolvidas em ambos os sexos. em todas as classes de tamanho, para ambos os sexos, foram encontrados caranguejos em processo de muda, isso indica que H. pudibundus não apresenta muda terminal e os indivíduos adultos continuam a sofrer ecdise após a maturidade. Não se verificou relação direta entre a porcentagem de fêmeas ovígeras e a temperatura da água. Os fatores ecológicos devem oscilar dentro dos limites de tolerância da espécie, o que favorece a continuidade dos processos fisiológicos, possibilitando a reprodução contínua. This study aimed to analyze the reproductive cycle of the crab Hepatus pudibundus (Herbst, 1785). The crabs were collected in Ubatuba, SP (23°26'S and 45°02'W) monthly from the July, 1992 to June, 1993. Samplings were performed with an otter trawl. In the laboratory the crabs were numbered, sexed and measured for their maximum carapace width. The gonad developmental stage and the moult stage were also macroscopically registered. In all sampled months ovigerous females and crabs in both sexes with developed gonad were observed. Moult activity in all size classes was verified. Such fact indicates that this species can suffer moult process after their maturity. In despite of temperature being pointed a one of the most important ecological factor in the reproductive biology of aquatic animals, it was verified any relation between water temperature and ovigerous ratio. The oscillations of the environmental factors in the Ubatuba region sea probably were not enough to alter the continuity of the physiological processes related to H. pudibundus reproduction. Universidade Estadual Paulista Centro de Ensino e Pesquisa do Litoral Paulista Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia Universidade Estadual Paulista Centro de Ensino e Pesquisa do Litoral Paulista Universidade Estadual Paulista Instituto de Biociências Departamento de Zoologia

Despite the economic importance of the carcinofauna which inhabits the estuarine regions of São Vicente, state of São Paulo, Brazil, there are few studies of the biology, distribution and biodiversity of crustaceans. The aim of this work was to list the species of macrocrustaceans that inhabit the non-consolidated substrates of Estuarine Bay Complex in São Vicente. After two years of monthly collections, we recorded two orders: Stomatopoda and Decapoda, represented by 13 families and 26 species. Only one species of the order Stomatopoda was recorded, all other 25 species belonging to the order Decapoda. Nine species of shrimp, in five families were captured; five of these belong to the family Penaeidae, one to Sergestidae one to Sycioniidae, one to Palaemonidae and one to Hippolytidae Anomuran crabs were composed of five species of hermit crabs. Brachyuran crabs were more prominent, with 11 species, most in the family Portunidae.