Differentiation of Pond-Reared from Wild Walleye Based on
their Otolith

Daniel R. DeLong
Lake Superior State University
School of Biology and Natural Resources
Sault Ste. Marie, MI 49783


Abstract  In September 1994, 97 walleye (Stizostedion vitrem) from 6
different lakes, 3 natural reproductive lakes and 3 stocked lakes were
collected by the Department of Natural Resources out of the Crystal Falls
District aud sent to the Lake Superior State University's Aquatic Lab. The
fish were than dissected and both otoliths removed. The otoliths were
prepared and analyzed for a light band with in their daily growth rings which
would indicated rapid growth distinguish them as pond-reared fish. A light
band was not shown on any of the 49 wild fish, and only 2 in 48 pond-reared
fish was this band detected. This study indicates that pond-reared walleye
from the Crystal Falls District can not be differentiated from wild walleyc by
the developnient of a light band on their otolith.








References

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