科创中国

To forage or hide? Threat-sensitive foraging behaviour in wild, non-reproductive passerine birds

原文链接：万方

• 作者：

  Shaun TURNEY,Jean-Guy J. GODIN

• 摘要：

  Because antipredator behaviours are costly, the threat-sensitive predator avoidance hypothesis predicts that individual animals should express predator-avoidance behaviour proportionally to the perceived threat posed by the predator. Here, we experimentally tested this hypothesis by providing wild passerine birds supplemental food (on a raised feeding platform) at either 1 or 4 m from the edge of forest cover (potential refuge), in either the presence or absence of a nearby simulated predation threat (a sharp-shinned hawk Accipiter striatus model). Compared with the control treatment, we observed proportionally fewer bird visits to the food patch, and the birds took longer to re-emerge from forest refuge and return to feed at the food patch, after the hawk presentation than before it. The observed threat-sensitive latency-to-return response was stronger when the food patch was further away from the nearest refuge. Overall, our results are consistent with the predictions of the threat-sensitive predator avoidance hypothesis in that wild passerine birds (primarily black-capped chickadees Poecile atricapillus) exhibited more intense antipre- dator behavioural responses with increasing level of apparent threat. The birds were thus sensitive to their local perceived threat of predation and traded-off safety from predation (by refuging) and foraging gains in open habitat in a graded, threat-sensitive manner [Current Zoology 60 (6): 719-728, 2014].

• 关键词：

  雀形目鸟类 潜在威胁 觅食行为 敏感 森林覆盖率 隐藏 生殖 行为反应

• 作者单位：

  Department of Biology, Carleton University, Ottawa, ON K1 S 5B6, Canada%Department of Biology, McGill University, Montreal, QC H3A 1B 1, Canada

• 基金项目：

  Acknowledgements We thank T. Hossie and T.N. Sherratt for statistical advice, T. Hossie and the anonymous reviewers for helpful comments which improved the manuscript, H.A. Godin for making the curtain and shroud for the hawk mount, and the National Capital Commission for permission to carry out our study in Vincent Massey Park. This study was supported by research funds awarded to J.-G.J.G from Carleton University.

• 来源期刊：

  动物学报(英文版)

• 年，卷(期)：

  2014006