What question did this study set out to answer?

Develop a dynamic population model for western Lake Erie walleye to reproduce historical population dynamics and evaluate optimal harvest strategies under environmental and mortality variations.

October 1, 1977Journal of the Fisheries Research Board of Canada

A Dynamic Model of the Western Lake Erie Walleye (Stizostedion vitreum vitreum) Population

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Authors

BSBrian J. ShuterUniversity of Toronto JKJ. F. KoonceCase Western Reserve University

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Implication

Population modeling study reveals robust optimal harvest strategies despite variable mortality in Lake Erie walleye, highlighting frameworks for sustainable fishery management.

Key Points

Develop a dynamic population model for western Lake Erie walleye to reproduce historical population dynamics and evaluate optimal harvest strategies under environmental and mortality variations.
Constructed a population model coupling density-dependent growth relationships with recruitment linked to breeding stock size and spring water temperature regimes.
Calibrated and validated the simulation against empirical survival, natural mortality, and fishing mortality estimates spanning 1947 to 1975.
Applied two stochastic modeling approaches to assess how harvest yields and optimal exploitation strategies respond to shifts in catchability and natural mortality.
Simulated population trajectories matched observed historical trends in western Lake Erie walleye both qualitatively and quantitatively.
Optimal harvest strategies proved largely insensitive to variations in catchability and natural mortality rates.
Total fishery yields exhibited high sensitivity to fluctuations in both natural mortality and catchability.

Cite This Study

Shuter et al. (1977) studied this question.

synapsesocial.com/papers/6aa91dd1b83f94992c2e3de0 https://doi.org/10.1139/f77-264

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Implication

Population modeling study reveals robust optimal harvest strategies despite variable mortality in Lake Erie walleye, highlighting frameworks for sustainable fishery management.

A Dynamic Model of the Western Lake Erie Walleye (Stizostedion vitreum vitreum) Population

Discussion

Member takes

Implication

Key Points

Cite This Study

A Dynamic Model of the Western Lake Erie Walleye (Stizostedion vitreum vitreum) Population

Discussion

Member takes

Implication

Key Points

Cite This Study

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