Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae)
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/225402 |
Resumo: | This study analyzed a population of the spider crab Epialtus brasiliensis, in regard to its size distribution, sex ratio and sexual maturity. The study was conducted on a rocky shore in the Ubatuba region, state of São Paulo, Brazil, where a wide strip of algae covers the intertidal zone. A total of 378 specimens were obtained: 200 males (128 juvenile and 72 adult crabs) and 178 females (46 juveniles and 132 adults). Their sizes ranged from 3.4 to 16.7 mm carapace length (CL). Taking into account that the pubertal and terminal molts are coincident in majid crabs, the maximum sizes attained by males and females are especially dependent on the factors that influence sexual maturity, mainly food resources, temperature and intraspecific competition. Males of E. brasiliensis occurred in all size classes, whereas females occurred only as far the 10th size class (12-13 mm CL). The total sex ratio did not differ statistically from 1:1, but when the juvenile and adult specimens were analyzed separately the differences between sexes were significantly different, with higher proportions of immature males and mature females. The CL50 calculated for males and females was 10.4, and 6.9 mm CL, respectively. Thus, males reach their sexual maturity at a larger size than females. This feature may be important for the reproductive strategy of this species, because larger males probably have greater reproductive success. © E. Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller), 2008. |
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Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae)GrowthSex ratioSexual maturityTerminal moltThis study analyzed a population of the spider crab Epialtus brasiliensis, in regard to its size distribution, sex ratio and sexual maturity. The study was conducted on a rocky shore in the Ubatuba region, state of São Paulo, Brazil, where a wide strip of algae covers the intertidal zone. A total of 378 specimens were obtained: 200 males (128 juvenile and 72 adult crabs) and 178 females (46 juveniles and 132 adults). Their sizes ranged from 3.4 to 16.7 mm carapace length (CL). Taking into account that the pubertal and terminal molts are coincident in majid crabs, the maximum sizes attained by males and females are especially dependent on the factors that influence sexual maturity, mainly food resources, temperature and intraspecific competition. Males of E. brasiliensis occurred in all size classes, whereas females occurred only as far the 10th size class (12-13 mm CL). The total sex ratio did not differ statistically from 1:1, but when the juvenile and adult specimens were analyzed separately the differences between sexes were significantly different, with higher proportions of immature males and mature females. The CL50 calculated for males and females was 10.4, and 6.9 mm CL, respectively. Thus, males reach their sexual maturity at a larger size than females. This feature may be important for the reproductive strategy of this species, because larger males probably have greater reproductive success. © E. Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller), 2008.Departamento de Zoologia Instituto de Biociências Universidade Estadual Paulista, Caixa Postal 510, Botucatu, SPLABCAM Departamento de Ciências Biológicas Faculdade de Ciências, s/n 17033-360, Bauru, SPDepartamento de Ciências Animais Universidade Federal Rural do Semi-Árido UFERSA, Mossoró, RNDepartamento de Zoologia Instituto de Biociências Universidade Estadual Paulista, Caixa Postal 510, Botucatu, SPUniversidade Estadual Paulista (UNESP)Faculdade de CiênciasUFERSATeixeira, Gustavo Monteiro [UNESP]Fransozo, Vivian [UNESP]Castilho, Antonio Leãoda Costa, Rogério Caetanode Morais Freire, Fúlvio Aurélio2022-04-28T20:48:27Z2022-04-28T20:48:27Z2008-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article169-175Senckenbergiana Biologica, v. 88, n. 2, p. 169-175, 2008.0037-2102http://hdl.handle.net/11449/2254022-s2.0-59049095734Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSenckenbergiana Biologicainfo:eu-repo/semantics/openAccess2022-04-28T20:48:27Zoai:repositorio.unesp.br:11449/225402Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:30:04.559151Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae) |
title |
Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae) |
spellingShingle |
Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae) Teixeira, Gustavo Monteiro [UNESP] Growth Sex ratio Sexual maturity Terminal molt |
title_short |
Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae) |
title_full |
Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae) |
title_fullStr |
Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae) |
title_full_unstemmed |
Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae) |
title_sort |
Size distribution and sex ratio in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae) |
author |
Teixeira, Gustavo Monteiro [UNESP] |
author_facet |
Teixeira, Gustavo Monteiro [UNESP] Fransozo, Vivian [UNESP] Castilho, Antonio Leão da Costa, Rogério Caetano de Morais Freire, Fúlvio Aurélio |
author_role |
author |
author2 |
Fransozo, Vivian [UNESP] Castilho, Antonio Leão da Costa, Rogério Caetano de Morais Freire, Fúlvio Aurélio |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Faculdade de Ciências UFERSA |
dc.contributor.author.fl_str_mv |
Teixeira, Gustavo Monteiro [UNESP] Fransozo, Vivian [UNESP] Castilho, Antonio Leão da Costa, Rogério Caetano de Morais Freire, Fúlvio Aurélio |
dc.subject.por.fl_str_mv |
Growth Sex ratio Sexual maturity Terminal molt |
topic |
Growth Sex ratio Sexual maturity Terminal molt |
description |
This study analyzed a population of the spider crab Epialtus brasiliensis, in regard to its size distribution, sex ratio and sexual maturity. The study was conducted on a rocky shore in the Ubatuba region, state of São Paulo, Brazil, where a wide strip of algae covers the intertidal zone. A total of 378 specimens were obtained: 200 males (128 juvenile and 72 adult crabs) and 178 females (46 juveniles and 132 adults). Their sizes ranged from 3.4 to 16.7 mm carapace length (CL). Taking into account that the pubertal and terminal molts are coincident in majid crabs, the maximum sizes attained by males and females are especially dependent on the factors that influence sexual maturity, mainly food resources, temperature and intraspecific competition. Males of E. brasiliensis occurred in all size classes, whereas females occurred only as far the 10th size class (12-13 mm CL). The total sex ratio did not differ statistically from 1:1, but when the juvenile and adult specimens were analyzed separately the differences between sexes were significantly different, with higher proportions of immature males and mature females. The CL50 calculated for males and females was 10.4, and 6.9 mm CL, respectively. Thus, males reach their sexual maturity at a larger size than females. This feature may be important for the reproductive strategy of this species, because larger males probably have greater reproductive success. © E. Schweizerbart'sche Verlagsbuchhandlung (Nägele u. Obermiller), 2008. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-12-01 2022-04-28T20:48:27Z 2022-04-28T20:48:27Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Senckenbergiana Biologica, v. 88, n. 2, p. 169-175, 2008. 0037-2102 http://hdl.handle.net/11449/225402 2-s2.0-59049095734 |
identifier_str_mv |
Senckenbergiana Biologica, v. 88, n. 2, p. 169-175, 2008. 0037-2102 2-s2.0-59049095734 |
url |
http://hdl.handle.net/11449/225402 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Senckenbergiana Biologica |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
169-175 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129077821833216 |