Light and Temperature: Key Factors Affecting Walleye Abundance and Production
By N. Lester, A. Dextrase, R. Kushneriuk, M. Rawson, Phil A. Ryan. 2004
140 citations recorded by the source corpus.
Abstract We used published information to determine optimum light and temperature conditions for walleye Sander vitreus (formerly Stizostedion vitreum) and then applied this simple niche definition to predict how water clarity, temperature, and bathymetry affect walleye habitat availability. Our model calculated thermal–optical habitat area (TOHA), the benthic area of a lake that supplies optimum light, and temperature conditions for walleye during an annual cycle. When water clarity is very low, little walleye habitat exists. As water clarity increases, TOHA for walleye initially increases and then declines exponentially. Optimum water clarity increases with maximum depth of the lake or, in the case of thermally stratified lakes, with thermocline depth. We tested this model by evaluating its ability to account for differences in the sustained yields of walleye fisheries on Ontario lakes. Our results demonstrate that (1) walleye harvest increases in proportion to TOHA times the square root of total dissol...
Subfields: Ecology, Nature and Landscape Conservation
View Paper: https://www.semanticscholar.org/paper/9acf479adeee3fa3c34a2622fa51860d5913c0a5
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In Ecology
In Nature and Landscape Conservation
Citations in the corpus
- Stock assessment in inland fisheries: a foundation for sustainable use and conservation (2016, background): “Off-site survey methods are simpler when the target population of fishers is known.”
- Forecasting effects of climate change on Great Lakes fisheries: models that link habitat supply to population dynamics can help (2006, methodology): “We developed models that link habitat conditions to indicators of population performance (e.g., stream flow and temperature to larval recruitment of river-spawning walleye (Jones et al. 2003); thermal and optical habitat volume to adult walleye yield (Lester et al. 2004)).”