Seleção de marcadores ISSR e diversidade genética em populações de Centropomus parallelus (robalo peva) na Reserva Extrativista de Canavieiras, Bahia, para fins de conservação da espécie

Abstract

Centropomus parallelus, popularly known as "Fat Snook" or " Little snook" is a species of high commercial and socioeconomic value, with a wide geographical distribution in the Americas. The genetic study around the population structure is a primordial contribution to the implementation of stock management and preservation programs. In this context, this work aimed to genetically characterize through ISSR (Inter Simple Sequence Repeat) markers populations of Centropomus parallelus from the Extractive Reserve (RESEX) of Canavieiras - Bahia, in order to gather information that could help in the elaboration of conservation proposals of this fishing resource and assist in the management plan of the species. A total of 115 individuals were randomly captured from different fishing grounds along the estuary of the Canavieiras’ RESEX. DNA extractions were performed according to the phenol - chloroform protocol and amplified by ISSR markers. The five primers used generated a total of 196 loci, approximately 72.6% of polymorphic bands, presented low gene flow (FST) and greater variability within populations. The high genetic variability of C. parallelus in the studied area is a relevant conservative scope of the species, management measures being fundamental to guarantee a good fishing roductivity.