Steven A. Ellis
Kennesaw, GA
The speaker, Ken Marion of the Univ. of Alabama in
>Birmingham, referred to blackbanded darters, Percina nigrofasciata, as very
>tolerant of turbid, low quality waters and presented an increase in their
>numbers as symptomatic of degrading water quality. Has anyone else heard of
>such a use of blackbanded darters? This is part of the creation of an Index
>of Biotic Integrity (IBI) which has the advantage of simplicity (some
>Senators actually understand it...). I have personal doubts about such
>indices for methodological and statistical reasons, but I'll save that for
>another rave.
>
>--Bruce Stallsmith
>Huntsville, AL
>
>
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