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Presented at the North American Benthological Society Annual meeting, Athens, Georgia, 2003 in Disturbance Ecology
Short-term effects of antimycin and rotenone on invertebrates in first order, high elevation streams.
K.M. Cerreto1, R.O. Hall, Jr.1, and H. Sexauer2. 1Department of Zoology & Physiology, University of Wyoming, Laramie, WY 82070, 2Wyoming Game & Fish Department, Region 1, Pinedale, WY 82941
A number of native fish restoration programs are being conducted in the western US by removing non-native fishes with piscicides and restocking with native cutthroat trout. Antimycin and rotenone are regularly used due to their high toxicity to fish and low toxicity to non-aquatic organisms. Although the effects of antimycin and rotenone on fish are well understood, little work has looked at the effect of these piscicides on non-target aquatic organisms, such as benthic invertebrates. We examined impacts of antimycin and a combination of antimycin and rotenone on benthic invertebrates in several high elevation (approximately 2,400m) streams in Bridger-Teton National Forest, in western Wyoming. We examined invertebrate drift during piscicide additions and in the benthos before and after piscicide additions. Rotenone additions dramatically affected invertebrates, causing massive drift within a few minutes. Antimycin alone seemed to have little to no effect on invertebrates, with drift rates not substantially different than control sites during the antimycin addition. We did not observe major invertebrate reductions in the benthos after antimycin addition. Antimycin alone appears to have little short-term effect on invertebrates in high elevation streams.
[b]This may not be the end all be all, but was the first hit that came up on Google search of "Invetebartes Rotenone". I always heard that rotenone killed most stream life, but that was hearsay This may not be the end all be all, but was the first hit that came up on Google search of "Invetebartes Rotenone". I always heard that rotenone killed most stream life, but that was hearsay [/b}
mike
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