Ecological distribution and population features of Hexapanopeus paulensis Rathbun, 1930 (Crustacea: Decapoda: Xanthoidea) caught by bottom trawling in the southeastern coast of Brazil: implications for its population structure

Autor(es)

Thiago Elias da Silva ^[1] ; Israel Fernandes Frameschi ^[1] ; Ariadine Cristine Almeida ^[2] ; Vivian Fransozo ^[3] ; Giovana Bertini ^[4] ; Fabiano Gazzi Taddei ^[5]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista Julio de Mesquita Filho UN, NEBECC, Inst Biociencias Botucatu, Dept Zool, Dist Rubiao Jr S-N, BR-18618970 Botucatu, SP - Brazil

^[2] Univ Fed Uberlandia, NEBECC, Inst Biol, Campus Umuarama, Av Para 1720, BR-38400902 Uberlandia, MG - Brazil

^[3] Univ Estadual Sudoeste Bahia, NEBECC, Dept Ciencias Nat Zool, Estr Bem Querer, Km 04, BR-45031900 Vitoria da Conquista, BA - Brazil

^[4] Univ Estadual Paulista Julio de Mesquita Filho UN, NEBECC, Campus Registro, Rua Nelson Bhihi Badur 430, BR-11900000 Registro, SP - Brazil

^[5] Univ Estado Amazonas, Ctr Estudos Super Parintins UEA CESP, Lab Estudos Crustaceos Amazon LECAM, Estr Odovaldo Novo, Km 01, BR-69152470 Parintins, Amazonas - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Nauplius; v. 25, 2017-04-27.

Resumo

ABSTRACT We analyzed the spatio-temporal variations of the abundance, distribution and the population structure of Hexapanopeus paulensis Rathbun, 1930 from the southeastern Brazilian coast. Monthly samples were taken from January 1998 to December 1999 at Ubatumirim, Ubatuba and Mar Virado bays. A total of 1084 individuals were obtained, 76 specimens at Mar Virado, 322 at Ubatuba and 686 at Ubatumirim. It was possible to verify an association between the abundance of H. paulensis and bottom temperature (positive correlation), grain size of sediment and organic matter content (both negatively). This explains the higher number of individuals in the stations nearest to the continent (with higher temperature values and heterogeneous substrate). Juveniles were recorded throughout the study period, constituting 39.5% of the sampled population, which highlights the importance of the region (especially Ubatumirim Bay, due the highest abundance) for the establishment of the species. Only females occupied the largest size classes, which could mean differential mortality between the sexes or growth rate. Nevertheless, further studies should be accomplished to a better comprehension of such difference. (AU)

• 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: 97/12107-0 - Composição e distribuição de anomuros (Crustacea: Decapoda) do substrato não consolidado na região de Ubatuba, SP
• Beneficiário: Lissandra Corrêa Fernandes Góes
• 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