Sep 11, 2012

DNA barcodes identify marine fishes of São Paulo State, Brazil

Molecular Ecology Resources
Amanda de Oliveira RibeiroClaudio Oliveira

Abstract

Anthropogenic impacts are an increasing threat to the diversity of fishes, especially in areas around large urban centres, and many effective conservation actions depend on accurate species identification. Considering the utility of DNA barcoding as a global system for species identification and discovery, this study aims to assemble a DNA barcode reference sequence library for marine fishes from the coastal region of São Paulo State, Brazil. The standard 652 bp 'barcode' fragment of the cytochrome c oxidase subunit I (COI) gene was PCR amplified and bidirectionally sequenced from 678 individuals belonging to 135 species. A neighbour-joining analysis revealed that this approach can unambiguously discriminate 97% of the species surveyed. Most species exhibited low intraspecific genetic distances (0.31%), about 43-fold less than the distance among species within a genus. Four species showed higher intraspecific divergences ranging from 2.2% to 7.6%, suggesting overlooked diversity. Notably, just one species-pair exhibited barcode divergences of <1%. This library is a first step to better know the molecular diversity of marine fish species from São Paulo, providing a basis for further studies of this fauna - extending the ability ...Continue Reading

Mentioned in this Paper

Cytochrome C Oxidase
Cytochrome c Oxidase Subunit VIa
Aquatic Organisms
Cytochrome-c Oxidase Deficiency
Fish <Chondrichthyes>
Phylogeny
Sequence Determinations, DNA
Fish <Actinopterygii>
Fish <Hyperoartia>
Biodiversity

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