Cryptic population structure in the severely depleted cowcod, Sebastes levis

摘要: Cowcod (Sebastes levis) is a member of northeastern Pacific Ocean species flock that experienced extensive fishery exploitation. Factors could produce structure in cowcod include major biogeographic boundary within cowcod’s geographical distribution; severe declines abundance, potentially, resulting reductions effective population size and divergence owing to genetic drift; dependence on patchily distributed habitat. We examine the following two questions: (i) there subdivision present and, if so, it concordant with marine regions separated by Point Conception, (ii) have loss variation reduction? Coarse-scale otolith analyses indicated regional across Conception. However, analysis 24 microsatellite DNA loci revealed as many three cryptic, divergent lineages (FCT = 0.194) meet south The southern had higher growth rate than ...