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An Improved Biotic Index of Organic Stream Pollution
Major improvements were made in using a biotic index of the arthropod fauna to evaluate organic stream pollution. All tolerance values were reevaluated, many were changed, and the scale for toleranceExpand
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The Biology of Chironomus plumosus (Diptera: Chironomidae) in Lake Winnebago, Wisconsin
Eggs of Chironomus plumosus (L.) are laid on the lake surface in masses averaging 1676 eggs. These masses absorb water, swell, and sink to the lake bottom, where the eggs hatch in 3–14 days. LarvalExpand
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Feeding Habits of Wisconsin's Predominant Lotic Plecoptera, Ephemeroptera, and Trichoptera
Feeding habits of nymphs or larvae of 101 species of Plecoptera, Ephemeroptera, and Trichoptera collected from Wisconsin's streams were determined by examining foregut contents. The percent by volumeExpand
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Changes in the Downstream Insect and Amphipod Fauna Caused by an Impoundment with a Hypolimnion Drain
Mill Creek, a small stream in southwestern Wisconsin, was impounded to create a 150-acre recreational lake. This action had a pronounced effect on the insect and amphipod fauna of a riffle 600 ftExpand
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A MODIFICATION OF THE BIOTIC INDEX OF ORGANIC STREAM POLLUTION TO REMEDY PROBLEMS AND PERMIT ITS USE THROUGHOUT THE YEAR
The biotic index of the arthropod fauna of streams is modified by limiting to ten the number of individuals in each taxon used in its calculation. This redu~s detrimental effects on the index ofExpand
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Phoresy by Plecopteracoluthus downesi on Larvae of Nigronia serricornis
The larvae, pupae, and adults of Plecopteracoluthus downesi Steffan were thoroughly described by Steffan (1965) when he reported finding this species in Quebec living phoretically on nymphs of 4Expand
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