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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Population biology and distribution of the portunid crab Callinectes ornatus (Decapoda: Brachyura) in an estuary-bay complex of southern Brazil

Texto completo
Autor(es):
Watanabe, Timoteo T. [1] ; Sant'Anna, Bruno S. [1] ; Hattori, Gustavo Y. [1] ; Zara, Fernando J. [2, 3]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Fed Amazonas, Inst Ciencias Exatas & Tecnol, Programa Posgrad Ciencia & Tecnol Recursos Amazon, BR-69103128 Itacoatiara, AM - Brazil
[2] Univ Estadual Paulista, CAUNESP, Invertebrate Morphol Lab, BR-14884900 Jaboticabal, SP - Brazil
[3] IEAMar, Dept Biol Aplicada, BR-14884900 Jaboticabal, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Zoologia; v. 31, n. 4, p. 329-336, AUG 2014.
Citações Web of Science: 0
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 Sao Vicente, state of Sao 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. (AU)

Processo FAPESP: 05/04707-5 - Histologia e ultrassonografia do desenvolvimento das gônadas de Brachyura (Crustacea)
Beneficiário:Fernando Jose Zara
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores
Processo FAPESP: 10/50188-8 - Crustáceos decápodes: multidisciplinaridade na caracterização da biodiversidade marinha do estado de São Paulo (taxonomia, espermiotaxonomia, biologia molecular e dinâmica populacional) (Biodiversidade Marinha)
Beneficiário:Fernando Luis Medina Mantelatto
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático