Caracterização genética das populações de Tambaqui (Colossoma macropomum, Cuvier, 1818) cultivadas em estações de piscicultura da Bahia Pesca, Bahia

Abstract

The species Colossoma macropomum, popularly known as tambaqui, it is a fish native to the Brazilian neotropical region that stands out in the national aquaculture as most native species cultivated. This species is of great importance in Bahia aquaculture since it is the second most species distributed by the state Bahia Pesca. This study aimed to evaluate the genetic diversity in three tambaqui stocks of different fish farming stations Bahia Pesca, through ISSR marker. They used 5 primers to analyze 75 individuals collected in the fish farming Pedra do Cavalo, JoanesII / Camaçari and Paraguaçu / Boa Vista do Tupim. Differences were found at a frequency of 62 fragments. There was moderate polymorphism values (43.1% to 63.64%), the diversity of Nei (0.1462 to 0.2017) and Shannon index (0.2465 to 0.3083). The analysis of molecular variance, demonstrated that the greatest variation is intrapulacional (75.08%) and non interpopulational (24.92%). Genetic differentiation was moderate (FST = 0.24919) and the number of migrants per generation was low (2.3). Inventories have high genetic variability and short differentiation and genetic distance between them.