Enhancing a walleye population by stocking: Effectiveness and constraints on recruitment
Authored by BM Johnson, M Vogelsang, RS Stewart
Date Published: 1996
Sponsors:
Federal Aid in Sport Fish Restoration Program
Platforms:
No platforms listed
Model Documentation:
Other Narrative
Model Code URLs:
Model code not found
Abstract
A long term project to evaluate the potential for food web manipulation
to improve water quality in Lake Mendota, Wisconsin began in 1987.
intensive walleye Stizostedion vitreum stocking and harvest regulations
were used to enhance walleye biomass. Over 60 million walleye fry and
2.4 million 50-mm walleye fingerlings were stocked during 1987-1992. Fry
survival was negligible; mark-recapture estimates of small (< 275 mm)
walleye abundance showed first year survival of stocked fingerlings to
be variable but always less than or equal to 10\%. Direct (predator
consumption) and indirect (prey abundance, predator biomass) evidence
suggested predation to be a major constraint to augmenting walleye
recruitment by stocking.
Tags
Individual-based model
growth
Success
Framework
Fish
Survival
Stizostedion-vitreum
Oneida-lake