10.5061/DRYAD.4CJ42
Valiquette, Eliane
Université Laval
Perrier, Charles
Université Laval
Thibault, Isabel
Université Laval
Bernatchez, Louis
Université Laval
Data from: Loss of genetic integrity in wild lake trout populations
following stocking: insights from an exhaustive study of 72 lakes from
Québec, Canada
Dryad
dataset
2014
Individual asignment
Genetic integrity
Stocking
2014-03-28T17:41:02Z
2014-03-28T17:41:02Z
en
https://doi.org/10.1111/eva.12160
872610 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Stocking represents the most important management tool worldwide to
increase and sustain commercial and recreational fisheries in a context of
overexploitation. Genetic impacts of this practice have been investigated
in many studies, which examined population and individual admixture, but
few have investigated determinants of these processes. Here, we addressed
these questions from the genotyping at 19 microsatellite loci of 3341
adult lake trout (Salvelinus namaycush) from 72 unstocked and stocked
lakes. Results showed an increase in genetic diversity and a twofold
decrease in the extent of genetic differentiation among stocked
populations when compared to unstocked. Stocked populations were
characterized by significant admixture at both population and individual
levels. Moreover, levels of admixture in stocked populations were strongly
correlated with stocking intensity and a threshold value of total
homogenization between source and stocked populations was identified. Our
results also suggest that under certain scenarios, the genetic impacts of
stocking could be of short duration. Overall, our study emphasizes the
important alteration of the genetic integrity of stocked populations and
the need to better understand determinants of admixture to optimize
stocking strategies and to conserve the genetic integrity of wild
populations.
Lake trout genotypesThe raw genotype of all individuals used in this
study.SANA_QC_2011.xlsxAncient lake trout genotypesThe subset of
historical genotypes compared to contemporary ones.SANA_QC_Ancient.xlsx
Canada
Québec