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Journal Article

Drug Effects on Recaptures of Raccoons

Stanley D. Gehrt, Laura L. Hungerford and Suzanne Hatten
Wildlife Society Bulletin (1973-2006)
Vol. 29, No. 3 (Autumn, 2001), pp. 833-837
Published by: Wiley on behalf of the Wildlife Society
Stable URL: http://www.jstor.org/stable/3784409
Page Count: 5
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Drug Effects on Recaptures of Raccoons
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Abstract

It is often necessary to use chemical immobilants in wildlife research; however, effects that these chemicals may have on behavior of wildlife species are poorly understood. During a live-trapping study of raccoons (Procyon lotor), we compared recapture success between raccoons immobilized with Telazol® (TL) and those immobilized with ketamine-acepromazine (KA). We conducted live-trapping sessions with wire-mesh box traps each spring and autumn during 1995-1997 on 3 study areas in northeastern Illinois. Among 344 paired raccoons, total numbers of recaptures were greater (rate ratio = 1.3, P=0.11 within trapping periods, rate ratio=1.4, P=0.01 for cumulative captures) for raccoons given TL than for those given KA. For all raccoons randomly assigned an immobilant (n=303 for TL, n=266 for KA), total recaptures were 40% greater for TL than for KA within trapping periods and 25% greater for cumulative recaptures (P<0.02 for both). Short-term (30-day) survival rates were similar for each drug group. The consistent pattern among our results and those tests that rejected the null hypothesis suggests a drug-specific effect on probability of recapture for raccoons.

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