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Quantifying how parental attributes influence characteristics of earlylife history stages of Ohio stocks of Lake Erie walleye

Exploited (i.e., commercial and recreational fisheries) fish  populations can exhibit large fluctuation of both recruitment and  population size.  Year class strength, and thus future abundance, is  driven by this recruitment variability.   Understanding both abiotic  (e.g., climate) and biotic (e.g., adult influence on progeny) factors  that influence recruitment is therefore essential to generating a  sustainable fishery in the long term.  Given the economic impact of  the recreational and commercial walleye fishery and the ecological  role of walleye in western Lake Erie, we sought to understand its  recruitment variability.  One characteristic of populations that could  influence recruitment success is adult attributes.  Thus, we sought to  quantify how parental attributes influence early life history  characteristics and success of walleye progeny.  By collecting data  from three purported spawning stocks (Maumee and Sandusky rivers and  open-water reefs), we can determine the degree to which they differ,  which, in turn, will provide insight into their relative contribution  to the Lake Erie population.  By comparing adult attributes to early  life history stages (eggs and larvae), we can determine if adult  characteristics (e.g., size, age, energetic condition) can be  translated to viability of their larvae.  Historical datasets also  will be explored for other important factors that may influence  recruitment.  Finally, we will develop a model to synthesize our  results and explore alternative management tactics for Lake Erie walleye.

Status
In progress
Type
Project
Start Date
End Date
Researchers
Roy SteinPrincipal Investigator
Associated with 2 projects
Konrad DabrowskiPrincipal Investigator
Associated with 2 projects
Elizabeth MarschallPrincipal Investigator
Associated with 3 projects
Jason Van TassellResearcher
Associated with 1 projects
Agencies
Ohio DNR $ 0.00USDEstimates

Funding 3 projects for a total of $455,000.00
Scope of Study
Field Investigation
Laboratory Investigation
Literature / Existing Data
Theoretical
Scale of Phenomena
Biochemical
Organism
Population
Processes
Natural Ecological Processes
Resource Management
Fisheries
Lake Basin Connecting Channels
Lake Erie
State Province
Ohio
Annex Numbers
Research & Development
Surveillance and Monitoring
Annex 17
Impact of water quality and AIS on fish and wildlife populations and habitats
General
Annex
  • Annex Numbers
    Annex Numbers
    Research & Development
    Surveillance and Monitoring
  • Annex 17
    Annex 17
    Impact of water quality and AIS on fish and wildlife populations and habitats

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