Diel variation in abundance and size of the seabob shrimp Xiphopenaeus kroyeri (Crustacea, Penaeoidea) in the Ubatuba region, Southeastern Brazil

Autor(es)

Simoes, Sabrina M. ^{[1, 2]} ; Costa, Rogerio C. ^{[1, 2]} ; Fransozo, Adilson ^[2] ; Castilho, Antonio L. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] UNESP, LABCAM Lab Biol Camaroes Marinhos & Agua Doce, Dept Ciencias Biol, Fac Ciencias, BR-17033360 Bauru, SP - Brazil

^[2] UNESP, NEBECC, Dept Zool, Inst Biociencias, BR-18618970 Botucatu, SP - Brazil

^[3] Fac Estadual Filosofia Ciencias & Letras Uniao Vi, Dept Biol, BR-84600000 Uniao Da Vitoria, PR - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 82, n. 2, p. 369-378, JUN 2010.
• Citações Web of Science: 22

Resumo

The objective of the present study was to analyze diel variation in the abundance and size of the seabob shrimp Xiphopenaeus kroyeri in the Ubatuba region, state of São Paulo, during the year 2000. In each season of the year, collections were made in the day and at night on 9 transects at depths ranging from 2 to 40 m. The estimated shrimp amount was of 28,878 individuals. Although the catch rate was higher during the day (15,853 shrimp), this did not differ significantly from the catch at night (13,025). The catch rate was higher in daytime on most transects, but was higher at night at locations where fine and very fine sand predominated. The majority of juveniles were caught during the day. The mean size (CL) was 14.43 ± 4.02 mm for day and 14.82 ± 4.28 mm for night samples, and the difference was significant (Student's t-test, df = 2, 429, t = 2.27, p = 0.02). The largest individuals were caught during the night. None of the three models that have been proposed in the literature to account for differences in the diurnal catch pattern of penaeid species can be applied to X. kroyeri. Our results provide evidence that sediment type not only influenced the catch rate in the analyzed periods, but also determined which models might fit the behavior of this species. (AU)

• 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: 04/07309-8 - Contribuição para o período de defeso do camarão do estado de São Paulo: distribuição espaço-temporal das pós-larvas e juvenis dos camarões rosa (Farfantepenaeus spp.), branco (Litopenaeus schmitti) e sete-barbas (Xiphopenaeus kroyeri) na região de Ubatuba, SP
• Beneficiário: Rogério Caetano da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• 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