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" Electronic frightening devices for reducing coyote predation on domestic sheep: Efficacy under range conditions and operational use "
Linhart, Samuel B.; Dasch, Gary J.; Johnson, Richard R.; Roberts, Jerry D.
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AL
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| Record Number
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943033
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LA0bh6p32k
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| Language of Document
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English
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| Main Entry
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Linhart, Samuel B.; Dasch, Gary J.; Johnson, Richard R.; Roberts, Jerry D.
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| Title & Author
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Electronic frightening devices for reducing coyote predation on domestic sheep: Efficacy under range conditions and operational use [Article]\ Linhart, Samuel B.; Dasch, Gary J.; Johnson, Richard R.; Roberts, Jerry D.
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| Title of Periodical
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Proceedings of the Vertebrate Pest Conference
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15
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| Date
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1992
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| Abstract
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A portable 12-v battery-operated coyote frightening device was developed for reducing coyote predation on sheep and evaluated on fenced pasture farm flock operations (1979-1982). In 1986, the final experimental model consisted of a PVC case, a timer, a blinking strobe light, and a warbling type siren that was activated for 7-10 seconds at about 6-7 minute intervals throughout the night. The devices were generally suspended about 2 m above the ground and were activated at dusk by a photocell and turned off about 2 hours after dawn by a timer. Here we report tests on high mountain summer sheep ranges (1982-1987), evaluation of the devices by ADC and external cooperators (1987-1990), and efforts to make the devices commercially available. On high mountain summer range, the devices reduced sheep losses on average about 60% with a mean dollar value savings of lambs of over
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