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Refinements in Scent-Station Methodology for Assessing Trends in Carnivore Populations
Robert D. Roughton and Mark W. Sweeny
The Journal of Wildlife Management
Vol. 46, No. 1 (Jan., 1982), pp. 217-229
Stable URL: http://www.jstor.org/stable/3808424
Page Count: 13
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The scent-station index method used by the U.S. Fish and Wildlife Service (USFWS) and others is a practical means for determining trends in carnivore populations. Suggested refinements of the USFWS standard procedure to improve efficiency include (1) use of an inexpensive plaster disc saturated with attractant, permitting rapid volatilization; (2) lines of 10 scent stations operated for 1 night to increase sample sizes, enhance sampling distribution, and minimize weather interference; and (3) computer analysis of data by a program incorporating the Fisher Randomization Test and Wilcoxon Signed Rank Test, which avoid unwarranted assumptions and yield greater sensitivity to changes in visitation rates than that afforded by the Z test used previously. The Fisher Randomization Test is a particularly powerful and efficient tool. The computer program, applicable to any paired data, is described. Scent-station survey recommendations based on these refinements and our experience are given.
The Journal of Wildlife Management © 1982 Wiley