Effect of environmental factors on the abundance of decapod crustaceans from soft bottoms off southeastern Brazil

Autor(es)

MICHELE FURLAN ^[1] ; ANTONIO L. CASTILHO ^[1] ; LISSANDRA C. FERNANDES-GÓES ^[3] ; VIVIAN FRANSOZO ^[3] ; GIOVANA BERTINI ^[4] ; ROGéRIO C. DA COSTA ^[6]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Biociencias, Dept Zool, UNESP, BR-18618000 Botucatu, SP - Brazil

^[2] Universidade Estadual do Piauí - Brasil

^[3] Univ Estadual Sudoeste Bahia UESB, Dept Ciencias Nat, BR-45031900 Vitoria Da Conquista, BA - Brazil

^[4] Univ Estadual Paulista, Unidade Registro, UNESP, BR-11900000 Registro, SP - Brazil

^[5] Universidade Estadual Paulista. Faculdade de Ciências. Departamento de Ciências Biológicas - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Anais da Academia Brasileira de Ciências; v. 85, n. 4, p. 1345-1356, 2013-10-11.

Resumo

This study investigated the importance of variations in environmental factors affecting the abundance patterns of decapods on the southeastern Brazilian coast. Sampling was carried out monthly from January 1998 through December 1999 in Ubatumirim and Mar Virado, Ubatuba region, using a commercial shrimp fishing boat equipped with double-rig nets. Six areas adjacent to rocky shores were chosen. Bottom-water samples were collected using a Nansen bottle, to measure the temperature and salinity. Sediment samples were also obtained by means of a Van Veen grab, for determination of texture and organic-matter content. The association of environmental factors with species abundance was evaluated by Canonical Correspondence Analysis (α = 0.05). Forty-one species of Decapoda were used in the multivariate analysis. The analysis indicated that sediment texture (phi) and bottom temperature were the main factors correlated (p < 0.05) with the spatial and temporal abundance of the species. Considering the study region as faunal transition zone, including a mixture of species of both tropical and subantarctic origin, the species responded differently to environmental factors, mainly temperature. It is conceivable that the decapods adjust their distribution according to their intrinsic physiological limitations, possibly as a result of the available resources. (AU)

• 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: 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: 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