A MODEL OF CHINOOK SALMON POPULATION DYNAMICS INCORPORATING SIZE-SELECTIVE EXPLOITATION AND INHERITANCE OF POLYGENIC CORRELATED TRAITS

摘要: Concern regarding the potential for selective fisheries to degrade desirable characteristics of exploited fish populations is growing worldwide. Although occurrence fishery-induced evolution in a wild population has not been irrefutably documented, considerable theoretical and empirical evidence that possibility exists. Environmental conditions influence survival growth many species may mask comparatively subtle trends induced by exploitation, especially given evolutionarily short time series data available from fisheries. Modeling be most efficient investigative tool under such conditions. Motivated public concern large-mesh gillnet altering Chinook salmon western Alaska, we constructed stochastic model dynamics salmon. The contained several individually based components incorporated size-selective assortative mating, size-dependent female fecundity, density-dependent survival, heritability size age. Substantial reductions mean age were observed all scenarios. Concurrently reducing directional selection increasing spawning abundance was effective stimulating recovery. Use this improve our ability investigate consequences exploitation aid development improved management strategies more effectively sustain into future.