Live cycles,drift, and standing stocks of some stoneflies (Insecta: Plecoptera) from streams in Minnesota,U.S.A. |
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| Authors: | Charles C Krueger Edwin F Cook |
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| Institution: | (1) Department of Entomology, Fisheries and Wildlife, University of Minnesota, 55108 St. Paul, MN, U.S.A. |
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| Abstract: | From analyses of monthly length frequency distributions of stonefly (Plecoptera) nymphs from stream riffles, two types of univoltine life cycles (Hynes 1961, classification) were observed: slow seasonal forIsoperla transmarina, Isoperla signata, Isogenoides olivaceus, andAllocapnia rickerii, and fast seasonal forProstoia similis. The Perlodidae stoneflies (Isoperla andIsogenoides) showed greatest propensities to drift near the end of their life cycles. Drift rates of the other two species of stoneflies were correlated to standing stock estimates. |
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| Keywords: | Plecoptera Perlodidae Capniidae Nemouridae life cycles life history stream drift production benthos |
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