Thirteen-lined ground squirrel (Sciuridae: Spermophilus tridecemlineatus) antipredator vigilance:: Monitoring the sky for aerial predators
Thirteen-lined ground squirrel (Sciuridae: Spermophilus tridecemlineatus) antipredator vigilance:: Monitoring the sky for aerial predators
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DOI：
10.1046/j.1439-0310.1999.00458.x
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发表时间：
1999-09-01
期刊：
影响因子：
1.7
通讯作者：
Leger, DW
中科院分区：
文献类型：
--
作者：
Arenz, CL;Leger, DW
尽管反捕食者警戒研究取得了成功，但这种警戒的具体重点一直难以确定。我们以前已经表明，十三行地松鼠（Spermophilus tridecemlineatus）增加他们的警惕性时，他们的横向视野被阻挡。在本文中，我们描述了一个实验中，我们试图确定的捕食类，这种警惕是针对。使用六个不同的封闭有机玻璃觅食盒与铰链'窃听'，我们能够阻止松鼠的天空，而不是阻碍他们的意见，地面的威胁。总的来说，在不同的盒子类型中，当它们的天空视野被遮挡时，地松鼠通过增加从盒子中撤出的时间百分比来提高警惕性。这一结果表明，很大一部分的地松鼠antipredator警惕是针对天空，是空中捕食者的监视。
Despite the success of antipredator vigilance research, the specific focus of this vigilance has been difficult to determine. We have previously shown that thirteen-lined ground squirrels (Spermophilus tridecemlineatus) increase their vigilance when their lateral field of view is obstructed. In this paper, we describe an experiment in which we attempt to determine the predator class for which this vigilance is directed. Using six differentially occluded Plexiglas foraging boxes with hinged 'eaves', we were able to obstruct the squirrels' view of the sky while not obstructing their view of terrestrial threats. In general, across the box types, when their sky view was obstructed, ground squirrels increased their vigilance by increasing the percentage of time spent withdrawn from the boxes. This result suggests that a significant portion of ground squirrel antipredator vigilance is directed at the sky and is surveillance for aerial predators.