Molecular Characterization of the Common Snook, Centropomus undecimalis (Bloch, 1792) in the Usumacinta Basin

The common snook is one of the most abundant and economically important species in Usumacinta basin Gulf Mexico, which has led to overfishing, threatening their populations. main goal present study was assess genetic diversity structure along River order understand population dynamics conservation status species. We characterized two mitochondrial markers (mtCox1 mtCytb) 11 microsatellites basin, divided into three zones: rainforest, floodplain river delta. data showed very low diversity, showing some haplotypic differences between rainforest delta zones. In contrast, we consistently recovered clusters with nuclear both DAPC STRUCTURE analyses. These results were consistent AMOVA analyses, significant among previously by STRUCTURE. terms distribution, zone corresponded diverse according data, suggesting that this a transition basin. Our support relevance molecular characterization monitoring fishery resources at better connectivity, could help management.