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MIXED-STOCK ANALYSIS OF LAKE MICHIGAN?S LAKE WHITEFISH COMMERCIALFISHERY AND HISTORICAL INTEGRITY OF RESOLVED GENETIC STOCKS

Despite recent research efforts, several information gaps remain in   terms of stock discrimination and the proper allocation of   commercial harvest of Lake Michigan lake whitefish between state-  licensed and native commercial fishing in Wisconsin and Michigan   waters. A recently developed stock-structure model (six identified   stocks) and microsatellite reference database for lake whitefish   spawning aggregates in Lake Michigan provides a framework for   addressing some of these key information gaps. The use of mixed   stock analysis (MSA) in conjunction with commercial fishing   operations throughout the lake can provide valuable insight into the   allocation of commercial harvest quotas. Furthermore, questions of   temporal stability of genetic stocks can be addressed thanks to   archived scale samples from the commercial fishery and advents in   molecular genetic techniques (i.e., PCR and multi-locus,   microsatellite genotyping) that enable small amounts of residual   cells adhering to these scales to be a source of genetic material   for historical DNA analysis. The objectives of this project are (1)   to use multi-locus microsatellite data and individual assignment   tests to identify the stock of origin for lake whitefish sampled   from the 2  9-2 1  Lake Michigan commercial harvest; (2) to   determine if contemporary genetic stock boundaries are consistent   with historical genetic structure in Lake Michigan lake whitefish   using archived scale samples from the historic commercial harvest;   and (3) to use multi-locus microsatellite data and individual   assignment tests/mixed-stock analysis to determine if there are   differences in which stocks are exploited in the contemporary lake   whitefish commercial harvest and historical (1973, 1986, and 1996)   commercial harvests.

Status
In progress
Type
Project
Start Date
End Date
Researchers
Brian SlossPrincipal Investigator
Associated with 2 projects
Randy ClaramuntResearcher
Associated with 1 projects
Trent M. SuttonResearcher
Associated with 1 projects
Justin VanDeHeyResearcher
Associated with 1 projects
Scott HansenResearcher
Associated with 1 projects
Agencies
Great Lakes Fishery Commission $ 127,184.00USDActual

Funding 54 projects for a total of $5,089,137.00
Scope of Study
Field Investigation
Laboratory Investigation
Scale of Phenomena
Landscape
Organism
Population
Resource Management
Fisheries
Lake Basin Connecting Channels
Lake Michigan

The Great Lakes - St. Lawrence Research Inventory is an
interactive, Internet-based, searchable database created as a tool to collect and disseminate
up-to-date information about research projects in the
Great Lakes - St. Lawrence Region.