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Factors limiting the distribution of larval and juvenile fishes in vegetated habitats of the Upper Mississippi River


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We studied the use that young fishes make of vegetated and nonvegetated habitats in Lawrence Lake (Pool 8, Upper Mississippi River). Habitat use was both extensive and variable. Fish were found in all portions of the macrophyte beds. Backwater macrophyte beds both near to and distant from the main channel of the Mississippi River displayed similar patterns of habitat use. The open water site was used principally by gizzard shad and unidentified Cyprinidae. Habitat use in macrophyte beds with differing vegetation densities in Lawrence Lake was probably influenced by multiple factors. Physical and chemical microhabitat data explained little of the variation in catch in light traps. Two-stage sampling analyses indicated that when fish [...]



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  • Upper Midwest Environmental Sciences Center (UMESC)



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Report by the National Biological Survey, National Fisheries Research Center, La Crosse, Wisconsin, for the National Biological Survey, Environmental Management Technical Center, Onalaska, Wisconsin

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