Table 29. Mean number of organisms from 5 samples taken by kick nets in riffle
communities in the Sturgeon River (Lake Huron) in 1992-1995 in areas that are periodically
treated (T) and in the Boardman River (Lake Michigan) which is not treated (C). Samples
were taken annually in the spring and fall in 1992-1995, and before and after application
of lampricide in 1994.
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