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Fish sampling data from Navigation Pool 8 of the Upper Mississippi River, 1991 1997


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Personnel of the Long Term Resource Monitoring Program for the Upper Mississippi River System have collected fish information in Navigation Pool 8 since 1989. In this report, I summarize data collected during the period 1991 97, in which gear deployment methods and sampling periods remained stable but fixed-site sampling changed to predominantly stratified random sampling in 1993. Sampling collections totaled 3,596 and yielded 324,948 fish of 91 species. Sampling effort increased over time, mainly when the change to random sampling occurred. Annual catches and species totals increased when random sampling was implemented; catches increased even with stable sampling effort in recent years. Of 12 gear types used, day and night electrofishing, [...]


(other) :
Andy Bartels


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  • Upper Midwest Environmental Sciences Center (UMESC)



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U.S. Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin

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