Complex pattern of genetic structuring in the Atlantic salmon (Salmo salar L.) of the River Foyle system in northwest Ireland: disentangling the evolutionary signal from population stochasticity

摘要: Little is known about the microevolutionary processes shaping within river population genetic structure of aquatic organisms characterized by high levels homing and spawning site fidelity. Using a microsatellite panel, we observed complex highly significant intrariver substructure Isolation-by-Distance, in Atlantic salmon stock large system. Two evolutionary models have been considered explaining mechanisms promoting substructuring salmon, member-vagrant metapopulation models. We show that both can be simultaneously used to explain patterns structuring Foyle anthropogenic factors had influence on contemporary observed. In an analytical development, found frequently estimator differentiation, FST, routinely underestimated differentiation factor three four compared equivalent statistic Jost's Dest (Jost 2008). These statistics also showed near-perfect correlation. Despite ongoing discussions regarding usefulness “adjusted”FST statistics, argue these could useful identify quantify qualitative differences between populations, which are important from management conservation perspectives as indicator existence biologically variation among tributary populations or warning critical environmental damage.