Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1984-46702014000400004 http://hdl.handle.net/11449/114429 |
Resumo: | Trawl fisheries are associated with catches of swimming crabs, which are an important economic resource for commercial as well for small-scale fisheries. This study evaluated the population biology and distribution of the swimming crab Callinectes ornatus (Ordway, 1863) in the Estuary-Bay of São Vicente, state of São Paulo, Brazil. Crabs were collected from a shrimp fishing boat equipped with a semi-balloon otter-trawl net, on eight transects (four in the estuary and four in the bay) from March 2007 through February 2008. Specimens caught were identified, sexed and measured. Samples of bottom water were collected and the temperature and salinity measured. A total of 618 crabs were captured (332 males, 267 females and 19 ovigerous females), with a sex ratio close to 1:1. A large number of juveniles were captured (77.67%). Crab spatial distributions were positively correlated with salinity (Rs = 0.73, p = 0.0395) and temperature (Rs = 0.71, p = 0.0092). Two peaks of recruitment occurred, in summer and autumn, and ovigerous females were mostly captured during summer, showing a seasonal reproductive pattern. The results showed that C. ornatus uses the bay as a nursery area for juvenile development. Callinectes ornatus is not yet a legally protected species, and the minimum allowed size of crabs caught in the area, although already restricted, should be carefully evaluated since the removal of large numbers of juveniles could negatively impact the local population. |
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Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern BrazilMigrationpopulation biologyseasonal distributionswimming crabTrawl fisheries are associated with catches of swimming crabs, which are an important economic resource for commercial as well for small-scale fisheries. This study evaluated the population biology and distribution of the swimming crab Callinectes ornatus (Ordway, 1863) in the Estuary-Bay of São Vicente, state of São Paulo, Brazil. Crabs were collected from a shrimp fishing boat equipped with a semi-balloon otter-trawl net, on eight transects (four in the estuary and four in the bay) from March 2007 through February 2008. Specimens caught were identified, sexed and measured. Samples of bottom water were collected and the temperature and salinity measured. A total of 618 crabs were captured (332 males, 267 females and 19 ovigerous females), with a sex ratio close to 1:1. A large number of juveniles were captured (77.67%). Crab spatial distributions were positively correlated with salinity (Rs = 0.73, p = 0.0395) and temperature (Rs = 0.71, p = 0.0092). Two peaks of recruitment occurred, in summer and autumn, and ovigerous females were mostly captured during summer, showing a seasonal reproductive pattern. The results showed that C. ornatus uses the bay as a nursery area for juvenile development. Callinectes ornatus is not yet a legally protected species, and the minimum allowed size of crabs caught in the area, although already restricted, should be carefully evaluated since the removal of large numbers of juveniles could negatively impact the local population.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Universidade Federal do Amazonas Instituto de Ciências Exatas e Tecnologia Programa de Pós-graduação em Ciência e Tecnologia para Recursos AmazônicosUniversidade Estadual Paulista Invertebrate Morphology LaboratoryUniversidade Estadual Paulista Invertebrate Morphology LaboratorySociedade Brasileira de ZoologiaUniversidade Federal do Amazonas (UFAM)Universidade Estadual Paulista (Unesp)Watanabe, Timoteo T.Sant'anna, Bruno S.Hattori, Gustavo Y.Zara, Fernando J. [UNESP]2015-02-02T12:39:32Z2015-02-02T12:39:32Z2014-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article329-336application/pdfhttp://dx.doi.org/10.1590/S1984-46702014000400004Zoologia (Curitiba). Sociedade Brasileira de Zoologia, v. 31, n. 4, p. 329-336, 2014.1984-4670http://hdl.handle.net/11449/11442910.1590/S1984-46702014000400004S1984-46702014000400004S1984-46702014000400004.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengZoologia (Curitiba)0,405info:eu-repo/semantics/openAccess2024-06-06T13:04:11Zoai:repositorio.unesp.br:11449/114429Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:04:05.539015Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil |
title |
Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil |
spellingShingle |
Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil Watanabe, Timoteo T. Migration population biology seasonal distribution swimming crab |
title_short |
Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil |
title_full |
Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil |
title_fullStr |
Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil |
title_full_unstemmed |
Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil |
title_sort |
Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil |
author |
Watanabe, Timoteo T. |
author_facet |
Watanabe, Timoteo T. Sant'anna, Bruno S. Hattori, Gustavo Y. Zara, Fernando J. [UNESP] |
author_role |
author |
author2 |
Sant'anna, Bruno S. Hattori, Gustavo Y. Zara, Fernando J. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal do Amazonas (UFAM) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Watanabe, Timoteo T. Sant'anna, Bruno S. Hattori, Gustavo Y. Zara, Fernando J. [UNESP] |
dc.subject.por.fl_str_mv |
Migration population biology seasonal distribution swimming crab |
topic |
Migration population biology seasonal distribution swimming crab |
description |
Trawl fisheries are associated with catches of swimming crabs, which are an important economic resource for commercial as well for small-scale fisheries. This study evaluated the population biology and distribution of the swimming crab Callinectes ornatus (Ordway, 1863) in the Estuary-Bay of São Vicente, state of São Paulo, Brazil. Crabs were collected from a shrimp fishing boat equipped with a semi-balloon otter-trawl net, on eight transects (four in the estuary and four in the bay) from March 2007 through February 2008. Specimens caught were identified, sexed and measured. Samples of bottom water were collected and the temperature and salinity measured. A total of 618 crabs were captured (332 males, 267 females and 19 ovigerous females), with a sex ratio close to 1:1. A large number of juveniles were captured (77.67%). Crab spatial distributions were positively correlated with salinity (Rs = 0.73, p = 0.0395) and temperature (Rs = 0.71, p = 0.0092). Two peaks of recruitment occurred, in summer and autumn, and ovigerous females were mostly captured during summer, showing a seasonal reproductive pattern. The results showed that C. ornatus uses the bay as a nursery area for juvenile development. Callinectes ornatus is not yet a legally protected species, and the minimum allowed size of crabs caught in the area, although already restricted, should be carefully evaluated since the removal of large numbers of juveniles could negatively impact the local population. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-08-01 2015-02-02T12:39:32Z 2015-02-02T12:39:32Z |
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 |
http://dx.doi.org/10.1590/S1984-46702014000400004 Zoologia (Curitiba). Sociedade Brasileira de Zoologia, v. 31, n. 4, p. 329-336, 2014. 1984-4670 http://hdl.handle.net/11449/114429 10.1590/S1984-46702014000400004 S1984-46702014000400004 S1984-46702014000400004.pdf |
url |
http://dx.doi.org/10.1590/S1984-46702014000400004 http://hdl.handle.net/11449/114429 |
identifier_str_mv |
Zoologia (Curitiba). Sociedade Brasileira de Zoologia, v. 31, n. 4, p. 329-336, 2014. 1984-4670 10.1590/S1984-46702014000400004 S1984-46702014000400004 S1984-46702014000400004.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Zoologia (Curitiba) 0,405 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
329-336 application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Zoologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Zoologia |
dc.source.none.fl_str_mv |
SciELO 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_ |
1808128603928395776 |