Data/hora: 09/06/2024 05:32:57

Provedor de dados: | 74
País: | Brazil
Título: | Identification and phylogenetic inferences on stocks of sharks affected by the fishing industry off the Northern coast of Brazil
Autores: | Rodrigues-Filho,Luis Fernando da Silva; Rocha,Tainá Carreira da; Rêgo,Péricles Sena do; Schneider,Horacio; Sampaio,Iracilda; Vallinoto,Marcelo.
Data: | 2009-01-01
Ano: | 2009
Palavras-chave: | Sharks; Molecular identification; Phylogenetic; MtDNA; Conservation.
Resumo: | The ongoing decline in abundance and diversity of shark stocks, primarily due to uncontrolled fishery exploitation, is a worldwide problem. An additional problem for the development of conservation and management programmes is the identification of species diversity within a given area, given the morphological similarities among shark species, and the typical disembarkation of processed carcasses which are almost impossible to differentiate. The main aim of the present study was to identify those shark species being exploited off northern Brazil, by using the 12S-16S molecular marker. For this, DNA sequences were obtained from 122 specimens collected on the docks and the fish market in Bragança, in the Brazilian state of Pará. We identified at least 11 species. Three-quarters of the specimens collected were either Carcharhinus porosus or Rhizoprionodon sp, while a notable absence was the daggernose shark, Isogomphodon oxyrhyncus, previously one of the most common species in local catches. The study emphasises the value of molecular techniques for the identification of cryptic shark species, and the potential of the 12S-16S marker as a tool for phylogenetic inferences in a study of elasmobranchs.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200031
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572009005000039
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.32 n.2 2009
Fonte: | info:eu-repo/semantics/openAccess