Cooperative Research Units
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Genomic variation and local adaptation among natural stocks of eastern oysters (Crassostrea virginica) in coastal Louisiana


September 2015 - August 2021


For any fishery, natural genetic variation among and within stocks is of critical importance, affecting aquaculture success and the outcome of restoration, recovery from overharvest ( and the capacity to respond to environmental change . Nevertheless, there are no comprehensive data on genetic variation among or within Louisiana oyster stocks, limiting managers’ abilities to choose stocks for aquaculture, or to predict the ways that environmental change might differentially impact stocks with varying environmental histories. Specifically, this research will address the following questions: A. How much genomic variation exists among oysters from geographically separated sites with differing environmental conditions? B. Do genetic differences among sites translate into differences in growth and survival among stocks translocated among sites?
C. Is there genetic evidence of post-settlement selective mortality, which would contribute to differentiation among stocks?
D. Do the larvae of adults from different sites vary in their salinity tolerances?

Research Products and Activities


  • Riley, S., M. La Peyre, J. La Peyre, M. Kelly. 2017. Using Next Generation Sequencing to Identify Local Adaptation to Salinity in the American Oyster, Crassostrea virginica, in the Louisiana Gulf Coast. Society for Comparative and Integrative Biology Meeting, January 2017, New Orleans, LA.

Current Staff

Federal Staff: 3

Masters Students: 3

Phd Students: 2

Post Docs: 1

University Staff: 5

5 Year Summary

Students graduated: 14

Scientific Publications: 43

Presentations: 76



Funding Agencies

  • Louisiana Sea Grant


Louisiana Cooperative Fish and Wildlife Research Unit Cooperators

  1. Louisiana Department of Wildlife and Fisheries
  2. Louisiana State University
  3. U.S. Fish and Wildlife Service
  4. U.S. Geological Survey
  5. Wildlife Management Institute