Genomic tools for management and conservation of Atlantic Cod in a coastal marine protected area

Marion Sinclair-Waters, P. Bentzen, C.J. Morris, D.E. Ruzzante, M.P. Kent, S. Lien, I.R. Bradbury

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Marine protected areas (MPAs) can serve as effective tools for the management and conservation of exploited marine species. The Gilbert Bay MPA in coastal Labrador was created to protect a genetically distinct population of Atlantic Cod (Gadus morhua); however, decreases in abundance continue to occur potentially due to exploitation outside the MPA. We developed a single nucleotide polymorphism (SNP) panel to identify Gilbert Bay cod in areas outside MPA boundaries where mixing with offshore cod occurs. In total, 361 individuals from Gilbert Bay, surrounding areas, and offshore were genotyped for 10,913 SNPs. Using FST rankings and guided regularized random forest, we selected 23 SNPs that together generate 100% accuracy in individual assignment and accurately estimate the proportion of Gilbert Bay cod in fishery samples from sites outside MPA boundaries: on average, fishery samples included 17.3% Gilbert Bay cod. Estimates of effective population size for the Gilbert Bay population ranged from 655 to 1,114. Our findings demonstrate the power of using genomic approaches for management of an exploited marine species and enhancing the design of MPAs.
Original languageEnglish
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume75
Issue number11
Pages (from-to)1915-1925
Number of pages11
ISSN0706-652X
DOIs
Publication statusPublished - Nov 2018
Externally publishedYes
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 1181 Ecology, evolutionary biology
  • EFFECTIVE POPULATION-SIZE
  • CONTEMPORARY EFFECTIVE POPULATION
  • MIXED-STOCK ANALYSIS
  • LINKAGE DISEQUILIBRIUM
  • GADUS-MORHUA
  • PROPAGULE DISPERSAL
  • GENETIC DIVERSITY
  • NORTH-SEA
  • RESERVES
  • LABRADOR

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