Population analysis of Scomberomorus cavalla (Cuvier, 1829) (Perciformes, Scombridae) from the Northern and Northeastern coast of Brazil

Scomberomorus cavalla is a pelagic fish species widely distributed on the Atlantic west coast, and a noticeable decrease in its capture level in the USA and Gulf of Mexico is occurring, compared to the levels reached by the species in the past. Likewise, in some areas of Brazil, there has been indic...

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Bibliographic Details
Published in:Brazilian journal of biology 2007-12, Vol.67 (4 Suppl), p.919-924
Main Authors: Santa Brígida, E L, Cunha, D B, Rego, P S, Sampaio, I, Schneider, H, Vallinoto, M
Format: Article
Language:English
Subjects:
Animals
BIOLOGY
Brazil
D-loop
DNA, Mitochondrial - analysis
Genetic Variation - genetics
Geography
Perciformes - genetics
population analysis
Scomberomorus cavalla
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Summary:Scomberomorus cavalla is a pelagic fish species widely distributed on the Atlantic west coast, and a noticeable decrease in its capture level in the USA and Gulf of Mexico is occurring, compared to the levels reached by the species in the past. Likewise, in some areas of Brazil, there has been indication of over-harvesting. However, there are no molecular studies focusing on the management of such an important item. Thus, in the present study, 380 nucleotide base pairs of the mitochondrial DNA D-Loop region of samples from Macapá, Bragança, and Fortaleza were sequenced. Phylogenetic and population analyses revealed that there is only one panmitic population, and low levels of genetic variability were verified. These results, as well as the noticed over-harvesting of S. cavalla, represent very important data to determine the management of such stock in order to prevent a collapse or the risk of future extinction.
ISSN:1519-6984
1678-4375
1519-6984
DOI:10.1590/S1519-69842007000500016