相关风险因子对高原鼠兔摄食行为的影响

研究了捕食风险环境中集和洞口距离对高原鼠兔摄食行为的影响。结果表明，集群数量的增加不仅降低了警觉行为，同时也减少了摄食行为，在高风险环境中，集群为1时的取食行为强度最大，低风险环境中，为0时最大，警觉行为主要出现在距洞口2m的范围内，其行为强度与洞口踪影职责负相关，当洞口距离大于3m时，风险处理区的高原鼠兔几乎无警觉行为出现，且该处理区的取食区域几乎压缩的洞口旁，研究结果表明，在捕食风险环境中，高原鼠兔摄食行为与集群和洞口距离之间具有复杂的关系，其行为决策反映了降低风险与摄取食物间的权衡，行为目标是在降低捕食风险的同时尽可能地取食食物。

Influence of Group Size and Distance to Refuge on Foraging of Palteau Pikas Under Predation Risk

The effects of group size and distance to refuge on foraging of plateau pikas( Ochotona curzonize ) under predation risk were examined in the paper Under predation risk environment, vigilance increases significantly at the cost of decreasing feeding The effect of group size on foraging is complex In the highest level of risk environment, plateau pikas prefer to feeding near one other pika, feeding site is as close to burrow as possible in response to the predation risk However, in the safe environment, they are willing to feeding alone, the feeding site in the environment is more wide than that in the risk environment The effect of distance to refuge on vigilance is also complex in response to the predation risk Vigilance increases as the distance to refuge increases, it occur mainly within 2 m from refuge, and it does not appear again in the risk environment when feeding far from refuge (>3 m), reflecting a trade off between the possibility of fly back refuge successfully and the efficiency of early detecting