Otoliths as a tool to study reef fish population structure from coastal islands of South Brazil

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Adelir Alves, J (Autor) Outra; Daros, FALM (Autor) Outra; Spach, HL (Autor) Outra; Soeth, M (Autor) Outra; Correia, AT (Autor) Outra

Revista

Título: Marine Biology Research

Vol. 14

Páginas: 973-988

ISSN: 1745-1000

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 8 Citações

Outras Informações

ID Authenticus: P-00Q-7FN

DOI: 10.1080/17451000.2019.1572194

Abstract (EN): To promote marine conservation and sustainable resources use it is highly important to understand reef fish population structure and dynamics. The sergeant major, Abudefduf saxatilis, is a common and abundant fish usually found in the Brazilian coasts, being considered a keystone-species for structuring benthic communities on reef habitats in the Atlantic Ocean. This study examined the morphology (shape indices and elliptic Fourier descriptors) and chemistry (Element:Ca) of A. saxatilis sagittal otoliths, collected in seven locations along the coast of South Brazil. Otolith morphology and chemistry were compared at short (range 0.5-2 km) and large (range 70-140 km) spatial scales using univariate and multivariate statistical approaches. Reclassification accuracy rates obtained from linear discrimination function analyses using both morphology and chemistry of otoliths were 61% and 82% for short and large spatial scales, respectively. No clear separation for individuals collected in islands within the Tamboretes Archipelago were observed suggesting that water masses are relatively homogeneous and/or that individuals could be highly mixed over short spatial scales. However, the higher reclassification success of the individuals belonging to Bom Abrigo, Galheta and Paz islands, indicates a limited movement of adults between habitats, a larval retention mechanism or a self-recruitment process occurring at large spatial scales.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16