Genetic structure and within-generation genome scan analysis of fisheries-induced evolution in a Lake Whitefish (Coregonus clupeaformis) population

Jobran Chebib, Sébastien Renaut, Louis Bernatchez, Sean M. Rogers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Size-selective harvest may lead to over-exploitation of commercial fisheries, but the population genetic and evolutionary consequences of such practices remain poorly understood. We investigated the role of within-generation selection in a historically over-exploited Lake Whitefish (Coregonus clupeaformis) population associated with fisheries-induced evolution in Lesser Slave Lake, Alberta, Canada. DNA from archived scales of Lake Whitefish collected between 1986 and 1999 were genotyped at 20 microsatellites and 51 gene-coding SNPs associated with growth and reproduction. We found that the Lake Whitefish in Lesser Slave Lake consisted of a single genetic stock, with microsatellites revealing more temporal than spatial variation in allele frequencies. A comparative genome scan among replicate cohorts from commercially harvested versus random survey samples identified one candidate SNP under divergent selection. This SNP localized within a gene encoding nucleoside diphosphate kinase A, a protein associated with differential growth. Collectively, the results highlight the utility of within-generation genome scans towards investigating the evolutionary consequences of harvest in the wild. 

Original languageEnglish
Pages (from-to)473-483
Number of pages11
JournalConservation genetics
Volume17
Issue number2
Early online date26 Nov 2015
DOIs
Publication statusPublished - 1 Apr 2016
Externally publishedYes

Keywords / Materials (for Non-textual outputs)

  • Coregonus
  • Lake Whitefish
  • SNP
  • Archived DNA
  • Historical DNA
  • Fisheries-induced evolution
  • Within-generation selection

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