An Assessment of Coyote and Dog Predation on Sheep in Southern Iowa

摘要: A questionnaire survey, field necropsies, domestic-animal claims, and a postcard survey were used to assess coyote dog predation on sheep in southern Iowa. Forty-one percent of 1,251 respondents reported they had killed by dogs or coyotes (Canis latrans) during 1975. Of the total losses reported, 41% attributed predation, 30% disease, 13% unknown causes. Three all owned allegedly coyotes, 1% dogs. Both necropsies domestic animal claims showed that more per incident operator than did coyotes. Almost 60% 1976 1977. Coyote varied summer fall, with 80% incidents occurring from 1 May October; not follow distinct chronological pattern. Field 227 alleged predator-caused revealed producers correctly assessed cause 94% time. The results surveys similar. Domestic-animal underestimated actual number occurred. J. WILDL. MANAGE. 45(4):883-893 Intensive predator control measures implemented early settlers drastically reduced Iowa (Van Hyning Pellett 1910, Scott 1937, Bowles 1975). During past 20 years, however, population incidence reports livestock due have increased considerably (Boggess 1975, Andrews Boggess 1978). Concurrently, fur prices dramatically (Andrews 1978), making an important resource for hunters trappers. et al. (1978) found that, since 1970, caused decreased at about same rate increased. This suggests may be blamed some actually (Denney 1974). Recent studies (Henne 1975; McAdoo DeLorenzo Howard, unpubl. rep., U.S. Fish Wildl. Serv., Denver, Colo., 1976; Nesse Nass 1977; Tigner Larson 1977) (Nielson Curle 1970; Reynolds Gustad, 1971; Early 1974; Meduna Robel, data, Gee explored impact industry western states. However, similar research has been needed midwestern farm states, where husbandry practices, habitat, densities, methods are quite different those West. Before implementation management plan Iowa, extent factors influencing assessed. We grateful who assisted this project. H. Bal, R. Bishop, Coffey, W. Downing, A. Farris, Franklin, Heer, E. Johnson, Klaas, M. Ryan, Joint contribution: Conservation Commission Federal Aid Wildlife Restoration Project W115-R-4 5, Journal Paper J-9778 Agriculture Home Economics Experiment Station, Ames, 2031. Manage. 45(4):1981 883 content downloaded 157.55.39.159 Sun, 18 Sep 2016 06:02:57 UTC All use subject http://about.jstor.org/terms 884 COYOTE AND DOG PREDATION ON SHEEP* Schaefer Schaefer, C. Steffen, T. Wickersham, L. Wing, Wywialowski provided valuable criticism throughout study preparation manuscript. Prescott, Roberg, Sayles data coding, Cook, Kienzler, V. Wright extremely helpful design analysis. also thank hunters, trappers, their cooperation.