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Isoenzyme analysis in Brama australis Valenciennes 1837 in the south center zone of Chile


, : Isoenzyme analysis in Brama australis Valenciennes 1837 in the south center zone of Chile. Gayana 66(2): 237-242

The pacific pomfret, Brama australis, is an epipelagic and mesopelagic fish and the distribution is from Coquimbo in the north to the Austral zone in the south. The main fisheries area are the V and VIII Region. We study the genetic variability in this species using starch gel electrophoresis of proteins. The samples com from Valparaiso (33degree05'S; 71degree40'W) and from Lebu (37degree37'S; 73degree40'W). The results show that the heterozygosity is 11% when 12 presuntive loci are analized. The polymorphism is 25%, similar to those reported in different species of marine fish. On the other hand, the statistical analysis of Fst and X2 test suggest that populations of Valparaiso and Lebu fit to Hardy-Weinberg equilibrium. The values of genetic identity (I=0.996) and Nei genetic distance (D=0,004) demonstrate not significative differences.

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