The distribution of fiddler crabs (Uca) along the coast of Brazil: implications for biogeography of the western Atlantic Ocean

Autor(es)

Thurman, C.L. ^[1] ; Faria, S.C. ^[2] ; McNamara, J.C. ^[3]

Afiliação do(s) autor(es)

^[1] The University of Northern Iowa, Department of Biology, IA - Estados Unidos

^[2] Universidade de São Paulo, Departamento de Biologia, FFCLRP, Ribeirão Preto, SP - Brasil

^[3] Universidade de São Paulo, Departamento de Biologia, FFCLRP, Ribeirão Preto, SP, - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Marine Biodiversity Records; v. 6, p. e1, 2013.
• Assunto(s): Ecologia Biogeografia marinha

Resumo

To assess and analyse accurately their geographical distributions, fiddler crabs (Uca) from the Atlantic coast of Brazil were studied using field collections, museum specimens and literature reports. More than 7000 specimens of ten Uca species were collected across five coastal biomes from 63 sites on the Atlantic coast of South America between the Brazilian States of Amapá and Santa Catarina in 2009 and 2010. Based on our analyses of mouthparts and habitat osmolality (=salinity), each species seems to prefer a particular niche defined by a specific array of physical factors. The species' distributions form four geographical patterns along the South Atlantic coast; however, the different species do not occur uniformly within each biome. Most common are U. (M.) rapax, U. (L.) leptodactyla, U. (B.) thayeri and U. (U.) maracoani with the relative abundance of each varying among the biomes according to habitat availability. Owing to their high constituent diversity, two geographical areas are candidates for biological conservation efforts. Considering fossil records, molecular clocks, oceanic hydrology and plate tectonics over the last 65 million years, the biogeographical patterns of the extant species can be used to reconstruct an evolutionary scenario for Uca in the tropical and temperate zones of the western Atlantic Ocean. (AU)

• Processo FAPESP: 09/50799-0 - Carl Leo Thurman II | University of Northern Iowa - Estados Unidos
• Beneficiário: John Campbell McNamara
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional