Population dynamics of the seabob shrimp Xiphopenaeus kroyeri (Dendrobranchiata, Penaeidae) in south-eastern Brazil

Autor(es)

Heckler, G. S. ; Simoes, S. M. ^[1] ; Santos, A. P. F. ^[1] ; Fransozo, A. ^[2] ; Costa, R. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, LABCAM Lab Biol Camaroes Marinhos & Agua Doce, Dept Ciencias Biol, Fac Ciencias, BR-17033360 Sao Paulo - Brazil

^[2] Univ Estadual Paulista, Dept Zool, Inst Biociencias, BR-18618000 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: AFRICAN JOURNAL OF MARINE SCIENCE; v. 35, n. 1, p. 17-24, 2013.
• Citações Web of Science: 20

Resumo

The population dynamics, including the sex ratio, reproductive period, individual growth and longevity, and population structure of the shrimp Xiphopenaeus kroyeri, are described. The shrimps were collected monthly from July 2005 to June 2007 at four sites in Ubatuba Bay, Brazil. The salinity, temperature, depth, organic matter content and sediment grain size were measured at each site. Specimens were quantified and sexed, their carapace length measured and their gonads were classified according to the stage of maturation. A von Bertalanffy model was used to estimate the individual growth, and longevity was calculated using its inverted formula. In total, 6 470 individuals were examined and the number of males and females differed significantly in favour of females. During some periods, the segregation could be related to the reproductive period. Reproductive females were captured throughout the sampled period, and there were biannual peaks that were followed by peaks of juveniles. Carapace growth was less for males than for females, which is likely related to oocyte production and the higher fecundity of the females. The higher probability of female capture can be related to their longer foraging to sustain the enhanced food requirement during the ovarian maturation period. (AU)

• Processo FAPESP: 06/51471-0 - Habitat preferencial entre juvenis e adultos do camarão sete-barbas Xiphopenaeus kroyeri (Heller, 1882) (Decapoda, Penaeidae) na região de Ubatuba, São Paulo
• Beneficiário: Gisele Salgado Heckler
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 09/54672-4 - Biologia reprodutiva e dinâmica populacional dos camarões Penaeoidea (Crustacea, Decapoda) em duas regiões do sudeste brasileiro: efeito latitudinal e proposta para o período de defeso
• Beneficiário: Rogério Caetano da Costa
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• 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
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• 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