Evidence for genetic differentiation of Octopus vulgaris (Mollusca, Cephalopoda) fishery populations from the southern coast of Brazil as revealed by microsatellites

Autor(es)

Moreira, Angela Aparecida ^[1] ; Comes Tomas, Acacio Ribeiro ^[2] ; Silva Hilsdorf, Alexandre Wagner ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Grad Program Biotechnol, BR-05508900 Sao Paulo - Brazil

^[2] Inst Fisheries, BR-11030906 Santos, SP - Brazil

^[3] Univ Mogi das Cruzes, Nucleo Integrado Biotecnol, Unit Biotechnol, BR-08780911 Mogi Das Cruzes, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Experimental Marine Biology and Ecology; v. 407, n. 1, p. 34-40, OCT 15 2011.
• Citações Web of Science: 15

Resumo

Octopus vulgaris is a cephalopod species in several oceans and commonly caught by artisanal and industrial fisheries. In Brazil, O. vulgaris populations are mainly distributed along the southern coast and have been subjected to intensive fishing during recent years. Despite the importance of this marine resource, no genetic study has been carried out to examine genetic differences among populations along the coast of Brazil. In this study, 343 individuals collected by commercial vessels were genotyped at six microsatellite loci to investigate the genetic differences in O. vulgaris populations along the southern coast of Brazil. Genetic structure and levels of differentiation among sampling sites were estimated via a genotype assignment test and F-statistics. Our results indicate that the O. vulgaris stock consists of four genetic populations with an overall significant analogous F(ST). (phi(CT) = 0.10710, P<0.05) value. The genetic diversity was high with an observed heterozygosity of Ho = 0.987. The negative values of F(IS) found for most of the loci examined suggested a possible bottleneck process. These findings are important for further steps toward more sustainable octopus fisheries, so that this marine resource can be preserved for long-term utilization. (C) 2011 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 04/02631-9 - Biotecnologia pesqueira aplicada à avaliação genética populacional dos estoques do polvo comum (Octopus cf. vulgaris) do litoral brasileiro pelo uso de marcadores microssatélites para seu manejo sustentado
• Beneficiário: Alexandre Wagner Silva Hilsdorf
• Modalidade de apoio: Auxílio à Pesquisa - Regular