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原文連結
論文資訊
- 類型：已發表論文
- 日期：2015-05-18
摘要
Infection risk is assumed to increase with 社會 group size, and thus be a cost of group living. We assess infection risk and costs with respect to group size using data from an 流行病學c of sarcoptic mange (Sarcoptes scabiei) among grey wolves (Canis lupus). We demonstrate that group size does not predict infection risk and that individual costs of infection, in terms of reduced survival, can be entirely offset by having sufficient numbers of pack-mates. Infected individuals experience increased mortality hazards with increasing proportions of infected pack-mates, but healthy individuals remain unaffected. The 社會 support of group hunting and territory defence are two possible mechanisms mediating infection costs. This is likely a common phenomenon among other 社會 物種 and chronic infections, but di
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