Alarm calls affect foraging behavior in eastern chipmunks (Tamias striatus, Rodentia: Sciuridae)
Alarm calls affect foraging behavior in eastern chipmunks (Tamias striatus, Rodentia: Sciuridae)
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DOI：
10.1046/j.1439-0310.2000.00619.x
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发表时间：
2000-12-01
期刊：
影响因子：
1.7
通讯作者：
Switzer, PV
中科院分区：
文献类型：
--
作者：
Baack, JK;Switzer, PV
我们用回放实验来测试是否报警电话影响觅食行为的东部花栗鼠（Tamias striatus）。我们进行了花栗鼠，在人工饲养站觅食，三个播放处理（沉默，控制噪音，报警电话），并检查变化的警惕和觅食行为。花栗鼠对警报呼叫的反应是更大程度和持续时间的警惕行为，如抬头和警惕姿势。花栗鼠也跑了更短的距离，并在听到警报后花了更长的时间从洞穴中重新出现。报警电话导致个人花更多的时间暴露在喂养站，然而，个人也采取了显着减少种子后，听到报警电话。这不是由于处理食物所花费的时间不同，而是由于装载速度较慢。花栗鼠似乎在听到警报后通过提高警惕来牺牲能量增益。这项研究表明，为了避免不必要的逃跑行为的成本，个人直接评估自己的风险，而不是仅仅依靠报警电话等间接线索。
We used playback experiments to test whether alarm calls affected the foraging behavior of eastern chipmunks (Tamias striatus). We subjected chipmunks, foraging at artificial feeding stations, to three playback treatments (silent, control noise, and alarm call) and examined changes in vigilant and foraging behavior. Chipmunks responded to alarm calls with a greater degree and duration of vigilant behavior, such as look-ups and alert postures. Chipmunks also ran a shorter distance to cover and took longer to re-emerge from the burrow after hearing an alarm call. Alarm calls caused individuals to spend more time exposed at the feeding stations; however, individuals also took significantly fewer seeds after hearing an alarm call. This was not due to a difference in the time spent handling food, but rather to a slower rate of loading. Chipmunks appear to sacrifice energy gain by increasing vigilance after hearing an alarm call. This study suggests that to avoid the costs of unnecessary escape behavior, individuals directly assess their own risk rather than relying only on indirect cues such as alarm calls.