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Influence of Care of Domestic Carnivores on Their Predation on Vertebrates

机译：食肉动物的照顾对其捕食脊椎动物的影响

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Abstract: Domestic dogs (Canis familiaris) and cats (Felis catus) are the most abundant mammalian carnivores worldwide. Given that domestic carnivores rely on human-provided food, their densities are usually independent of prey densities. Nevertheless, underfed pets may need to hunt to meet their energetic and nutritional requirements. We explored the effects of different levels of care (provision of food) of dogs and cats on their predation rates on wild vertebrates in 2 areas of southern Chile. We interviewed cat and dog owners and analyzed prey remains in scats of pets to examine how domestic dogs and cats were managed and to gather information on the wild vertebrates killed and harassed by pets. We used logistic regression to examine the association between pet care and the frequency of wild vertebrate remains in scats. The probability of a dog preying on vertebrates was higher for poorly fed than for adequately fed dogs (odds ratio = 3.7) and for poorly fed than for adequately fed cats (odds ratio = 4.7). Domestic dogs and cats preyed on most endemic and threatened mammals present in the study sites. Our results provide support for the hypothesis that the less care domestic animals receive from owners the higher the probability those animals will prey on wild vertebrates.
机译：摘要：家犬（犬天猫）和猫（猫天猫）是世界上最丰富的哺乳动物食肉动物。考虑到家养食肉动物依靠人类提供的食物，它们的密度通常与猎物密度无关。然而，未喂食的宠物可能需要狩猎才能满足其能量和营养需求。我们探索了智利南部2个地区对猫和狗的不同照顾水平（提供食物）对其野生脊椎动物捕食率的影响。我们采访了猫和狗的主人，并分析了宠物粪便中的猎物残留，以研究如何管理家养的猫和狗，并收集有关被宠物杀死和骚扰的野生脊椎动物的信息。我们使用逻辑回归分析研究了宠物护理与粪便中野生脊椎动物残骸的发生频率之间的关系。饲喂差的狗比饱食的狗（奇数比= 3.7）和饲喂差的猫比脊椎动物的食量高（奇数比= 4.7）更高。在研究地点，家猫和猫被大多数地方性和受威胁的哺乳动物捕食。我们的结果为以下假设提供了支持：家养动物从主人那里得到的照顾越少，这些动物捕食野生脊椎动物的可能性就越高。

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