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A COMPARISON OF GENETIC DIVERSITY AT THE MAJOR HISTOCOMPATIBILITY COMPLEX IN HATCHERY-PRODUCED AND WILD LAKE STURGEON

Lake sturgeon stocking is becoming a relatively common management   strategy in the Great Lakes and beyond.  However, stocked lake   sturgeon may not represent the natural genetic diversity present in   wild lake sturgeon, thereby affecting the evolutionary potential of   reintroduced populations.  The major histocompatibility complex   (MHC) is involved in disease resistance and experiences strong   selection pressures.  In many vertebrate species, individuals will   often choose mates with different genetic variation at the MHC and   genetic diversity is maintained in the population.  The lack of mate   choice in lake sturgeon stocking programs may reduce this important   source of genetic variation.  The different selective forces acting   in the hatchery setting and in the wild could also result in MHC   diversity differences between the two groups.  Our hypothesis is   that lake sturgeon produced by artificial matings in a stocking   program will have lower genetic diversity at the MHC.  Samples have   already been collected from hatchery-produced offspring and from   wild offspring.  Both groups are from the Menominee River.  Thirty   samples from each group will be analyzed at the MHC locus and   differences in genetic diversity (heterozygosity and number of   alleles) will be tested between the two groups.  Results of this   pilot project may lead to future projects that explore possible   reasons for any observed differences between hatchery-produced and   wild lake sturgeon.

Status
In progress
Type
Project
Start Date
End Date
Researchers
Amy WelshPrincipal Investigator
Associated with 2 projects
Brian SlossResearcher
Associated with 2 projects
Agencies
Great Lakes Fishery Commission $ 10,000.00USDActual

Funding 54 projects for a total of $5,089,137.00
Scope of Study
Laboratory Investigation
Scale of Phenomena
Population
Resource Management
Fisheries
State Province
Michigan
Wisconsin
Annex Numbers
Surveillance and Monitoring

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