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Description: |
29 pages : illustrations, tables ; 26 cm |
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General Note: |
Issued with: Aquatic macroinvertebrates in small Wisconsin trout stream before, during, and two years after treatment with the fish toxicant antimycin, by Gerald Z. Jacobi and Donald J. Degan. (No. 81). |
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Bibliography Note: |
Includes bibliographical references (page 11). |
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Summary, Etc. Note: |
Abstract: Samples of macrobenthos, collected over a 14-month period from nine 0.03-ha experimental ponds at the Fish-Pesticide Research Laboratory (Columbia, Missouri), were analyzed to determine the long- and short-term effects of antimycin A and rotenone. The ponds were characterized by an abundance of bushy pondweed (Najas guadalupensis) and by the absence of fish. There were no effects on species diversity, emergence, seasonal dynamics, abundance, or relative numbers of taxa that could be attributed to either toxicant. Periods of spring emergencee, summer buildup, and fall emergence of insects were closely associated with the seasonal developmentand decline of vegetation. |