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folder.gifSummary of Monitoring Findings for Fiscal Year 2001
Figures

Figure 21. Estimated mean density of mayflies (Ephemeridae; number m-2) by study area, weighted by area of strata from 1993 to 2001, Upper Mississippi River System.
Mayfly abundances in Lake Pepin, Pool 4 of the Upper Mississippi River System (1992–2002).

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