Movements, habitat use, and entrainment of stocked juvenile lake sturgeon in a hydroelectric reservoir system

Author:

Hegna Jonathan1,Scribner Kim2,Baker Edward3

Affiliation:

1. Department of Fisheries and Wildlife, Michigan State University, 480 Wilson Rd., East Lansing, MI 48824, USA.

2. Department of Fisheries and Wildlife, Department of Integrative Biology, Michigan State University, 480 Wilson Rd., East Lansing, MI 48824, USA.

3. Marquette Fisheries Research Station, Michigan Department of Natural Resources, 484 Cherry Creek Rd., Marquette, MI 49855, USA.

Abstract

Identifying movement and habitat use patterns is essential for fish passage efforts and the conservation of threatened species. We used acoustic telemetry to track the movements of 44 juvenile lake sturgeon (Acipenser fulvescens) throughout Kleber Reservoir in northern Michigan. On average, lake sturgeon moved 502 m between telemetry positions, with age-2 lake sturgeon moving longer distances than age-1 lake sturgeon. Areas with high numbers of lake sturgeon detections were clustered near the forebay, while zones with low numbers of detections were clustered toward the head of the reservoir. Analyses showed that 66.4% of the variance in habitat use could be explained by physical habitat features. Reservoir areas with ample deepwater habitat, fine soft substrates, and limited macrophyte vegetation were the most frequently occupied and, thus, may provide suitable habitat conditions to support juvenile lake sturgeon. We observed that 54.4% of the age-1 and 52.8% of the age-2 lake sturgeon stocked into Kleber Reservoir were entrained. Reservoir size, morphology, and the location of suitable habitat in relation to hydroelectric infrastructure may be key factors that affect entrainment rates.

Publisher

Canadian Science Publishing

Subject

Aquatic Science,Ecology, Evolution, Behavior and Systematics

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3. Auer, N.A., and Dempsey, D. 2013. The Great Lake sturgeon. Michigan State University Press, East Lansing, Mich.

4. Quantifying Stream Substrate for Habitat Analysis Studies

5. Home Range Size and Seasonal Movement of Juvenile Lake Sturgeon in a Large River in the Hudson Bay Drainage Basin

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