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" A preference-testing system for evaluating repellents for black-tailed deer "
Campbell, Dan L.; Bullard, Roger W.
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AL
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| Record Number
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942050
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LA3nf0h7jn
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| Language of Document
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English
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| Main Entry
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Campbell, Dan L.; Bullard, Roger W.
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| Title & Author
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A preference-testing system for evaluating repellents for black-tailed deer [Article]\ Campbell, Dan L.; Bullard, Roger W.
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| Title of Periodical
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Proceedings of the Vertebrate Pest Conference
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5
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| Date
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1972
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| Abstract
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In a program to evaluate repellents for protecting Douglas-fir (Pseudotsuga menziesii) seedlings from browsing by black-tailed deer (Odocoileus hemionus columbianus), a preference-testing system was developed to supplement preliminary pen tests. The system uses an apparatus that presents individual test deer with a choice between two foods (usually feed pellets treated with a candidate repellent or a marginally palatable standard). The two foods are presented, in alternating positions, only long enough for the deer to make a choice; results are recorded in terms of percent choices made for the candidate repellent, or percent consumption. Tests thus far with a number of candidate repellents, including several chemical fractions derived from putrefied fish, have generally given clear-cut results, and the system appears very promising for this kind of evaluation. Although semi-tame deer and an experienced operator are required, the system uses very small amounts of candidate repellents, produces evaluations on a material in 1 to 2 days, can be used year-round, and permits observations of deer behavior during the choice process.
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