Reproductive biology of the shrimp Rimapenaeus constrictus (Decapoda, Penaeidae) in the Ubatuba region of Brazil

Autor(es)

Costa, Rogério Caetano da ^[1] ; Fransozo, Adilson

Afiliação do(s) autor(es)

^[1] Universidade Estadual Paulista (UNESP). Campus de Botucatu. Instituto de Biociências - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Crustacean Biology; v. 24, n. 2, p. 274-281, 2004.
• Área do conhecimento: Ciências Biológicas - Zoologia
• Assunto(s): Crustacea Decapoda Penaeidae Rimapenaeus constrictus Maturidade sexual Reprodução Ubatuba (SP)

Resumo

Sexual maturity, temporal reproductive pattern, and recruitment of juveniles were examined for the shrimp Rimapenaeus constrictus at three different bays in the Ubatuba region (Mar Virado, Ubatuba, and Ubatumirim), State of São Paulo (238S 458W). Monthly samples were taken from January 1998 to December 1999. The presence or absence of mating plugs (associated with mating and insemination) and ovarian maturity were used to examine breeding in adult females. The whole sample comprised 3863 females and 1468 males. Estimates of size (carapace length) at the onset of sexual maturity were 7.0 mm and 7.8 mm for males and females, respectively. Higher percentage of females bearing ripe gonads was observed during spring and summer over the course of the study, contrasting to the low proportion in fall 1998 and winter 1999. Juvenile shrimps were sampled year-round. These results suggest a continuous reproductive pattern for R. constrictus. Mating, spawning, and juvenile recruitment took place mostly in shallow waters up to 20-m depths in the study region. Warm to mild temperatures may favour the spawning pattern observed in this species. The classical paradigm of continuous reproduction at lower latitudes, with increased seasonality of breeding period at higher latitudes, seems to apply to this species. (AU)

• Processo FAPESP: 98/03134-6 - Análise bioecológica de crustáceos braquiúros costeiros do Litoral Norte Paulista
• Beneficiário: Maria Lucia Negreiros Fransozo
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 97/12106-3 - Biologia e distribuição espacial e temporal dos caranguejos (Crustacea: Decapoda: Brachyura) do substrato não-consolidado, na região de Ubatuba (SP)
• Beneficiário: Giovana Bertini
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 97/12108-6 - Biologia e distribuição espacial e temporal das espécies de camarões Dendrobranchiata (Crustacea: Decapoda) na região de Ubatuba (SP)
• Beneficiário: Rogério Caetano da Costa
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 94/04878-8 - Transporte para melhoria das condições de estudo dos crustáceos decápodes
• Beneficiário: Maria Lucia Negreiros Fransozo
• Modalidade de apoio: Auxílio à Pesquisa - Programa Infraestrutura