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A global synthesis and assessment of free-ranging domestic cat diet
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A global synthesis and assessment of free-ranging domestic cat diet
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Journal Article
A global synthesis and assessment of free-ranging domestic cat diet
2023
Overview
Free-ranging cats (
Felis catus
) are globally distributed invasive carnivores that markedly impact biodiversity. Here, to evaluate the potential threat of cats, we develop a comprehensive global assessment of species consumed by cats. We identify 2,084 species eaten by cats, of which 347 (16.65%) are of conservation concern. Islands contain threefold more species of conservation concern eaten by cats than continents do. Birds, reptiles, and mammals constitute ~90% of species consumed, with insects and amphibians being less frequent. Approximately 9% of known birds, 6% of known mammals, and 4% of known reptile species are identified in cat diets. 97% of species consumed are <5 kg in adult body mass, though much larger species are also eaten. The species accumulation curves are not asymptotic, indicating that our estimates are conservative. Our results demonstrate that cats are extreme generalist predators, which is critical for understanding their impact on ecological systems and developing management solutions.
Free-ranging domestic cats have major ecological impacts globally. Here, Lepczyk et al. compile records of the species consumed by cats, identifying thousands of species consumed, including hundreds of species that are of conservation concern.
