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Dietary Overlap Of An Alien And Native Carnivore On San Clemente Island, California, R. Brand Phillips, Clark S. Winchell, Robert H. Schmidt
Dietary Overlap Of An Alien And Native Carnivore On San Clemente Island, California, R. Brand Phillips, Clark S. Winchell, Robert H. Schmidt
United States Fish and Wildlife: Staff Publications
Predation by feral cats (Felis catus) is recognized as a major threat to native fauna worldwide, but the competitive effects of cats on native species have not been extensively studied. Cats occur on San Clemente Island, California, in sympatry with endemic island foxes (Urocyon littoralis clementae). We examined diets of cats and island foxes between years, seasons, and habitats to assess the potential for resource competition between the 2 species. Analysis of 602 cat and 958 fox feces revealed a high level of dietary overlap (O = 0.93) and relatively narrow niche breadths for both …