Genetic Population Structure Of Atlantic Halibut, Hippoglossus Hippoglossus
Atlantic halibut, Hippoglossus hippoglossus, have been shown to home to the same spawning site in successive years, suggesting that distinct breeding populations could exist. The species' population structure has, therefore, been studied using biochemical genetic methods to reveal possible genetic differences among fish from different spawning sites. Genetic screening of 43 loci in Faroese halibut revealed only four polymorphic loci, including one highly polymorphic fumarase locus not previously detected in halibut. Comparing these four loci among stocks from the Faroes, the Norwegian coast and Greenland gave evidence of general genetic homogeneity over the sampling range. This lack of genetic differentiation is not taken as proof, but as strong evidence of substantial gene flow between geographical areas.