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Wednesday January 22, 2025 11:20am - 11:40am CST
TBA
AUTHORS:  Laurel H. Sacco, Jeremy L. Kientz1 Gene F. Galinat1, Bill Miller, Jacob L. Davis1
and Steven R. Chipps2

Department of Natural Resource Management
South Dakota State University
Brookings, SD, 57007

1South Dakota Department of Game, Fish and Parks
TOC West-4310 Adventure Trail
Rapid City, SD, 57702

2U.S. Geological Survey, South Dakota Cooperative Fish and Wildlife Unit, Department of Natural Resource Management, South Dakota State University, Brookings, SD, 57007

ABSTRACT:  Understanding population recruitment is an important step in developing effective Walleye management strategies. In western South Dakota, Angostura, Belle Fourche, and Shadehill reservoirs provide important irrigation needs and flood control. These reservoirs also represent popular destinations for Walleye anglers, although the recruitment dynamics of these fisheries are poorly understood. In Angostura Reservoir, the stocking of larger, fingerling fish successfully augmented year class strength and was the principal driver of Walleye recruitment. In reservoirs where stocking was absent or inconsistent, Walleye recruitment dynamics were influenced by abiotic factors, particularly temperature and hydrologic conditions. Spring temperatures were universally influential in recruitment outcomes, although environmental conditions in late summer and fall were also important. Because recruitment bottlenecks generally occur during early life stages for Walleye, warming rate and(or) elevated temperatures, particularly during spring, may have negative impacts on cohort survival in western irrigation reservoirs.
Speakers
SC

Steve Chipps

South Dakota Cooperative Fish and Wildlife Unit, Department of Natural Resource Management, South Dakota State University, U.S. Geological Survey
Wednesday January 22, 2025 11:20am - 11:40am CST
TBA

Attendees (2)


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