Jim Thompson, Fisheries Biologist
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Posted on April 07, 2010 | Permalink
Sampling Fish Eggs and Larvae in the Elk and Northeast Rivers
Location: Elk and Northeast Rivers
Marek Topolski and I were out yesterday sampling on the Elk and Northeast Rivers for DNR Fisheries. Our study involves pulling a fine-meshed net behind our boat to collect fish eggs and larvae to document the presence or absence of spawning fish in these rivers. We observed adult hickory shad, white perch, and alewife herring. Hickory shad appeared to be especially strong in the Northeast River. In addition to the boat tows, we use a similar net to sample small inland creeks to document how far these fish migrate up river. We also take several water quality measurements including temperature, dissolved oxygen, pH, and conductivity. Sampling will continue through April and into May It will take several weeks before we analyze our sample and compare the results with data from previous years.