Data from: Understanding admixture patterns in supplemented populations: a case study combining molecular analyses and temporally explicit simulations in Atlantic salmon ...

• Main Authors: Perrier, Charles, Baglinière, Jean-Luc, Evanno, Guillaume
• Format: Dataset
• Language: English
• Published: Dryad 2012
• Subjects: Captive Populations; Salmo salar; Aquaculture; Atlantic salmon
• Online Access: https://dx.doi.org/10.5061/dryad.j101c; https://datadryad.org/stash/dataset/doi:10.5061/dryad.j101c

Genetic admixture between wild and introduced populations is a rising concern for the management of endangered species. Here we use a dual approach based on molecular analyses of samples collected before and after hatchery fish introduction in combination with a simulation study to get insight into the mechanisms of admixture in wild populations. Using 17 microsatellites we genotyped pre- and post-stocking samples from four Atlantic salmon populations supplemented with non-native fish to estimate genetic admixture. We also used individual-based temporally explicit simulations based on realistic demographic and stocking data to predict the extent of admixture. We found a low admixture by hatchery stocks within pre-stocking samples but moderate to high values in post-stocking samples (from 12 % to 60 %). The simulation scenarios best fitting the real data suggested a 10 to 25 times lower survival of stocked fish relative to wild individuals. Simulations also suggested relatively high dispersal rates of stocked ... : dataGenotypes of the individuals, ordered by rivers and cohorts. ...