ECHOLOCATION BEHAVIOR OF VESPERTILIONID BATS (LASIURUS-CINEREUS AND LASIURUS-BOREALIS) ATTACKING AIRBORNE TARGETS INCLUDING ARCTIID MOTHS
ECHOLOCATION BEHAVIOR OF VESPERTILIONID BATS (LASIURUS-CINEREUS AND LASIURUS-BOREALIS) ATTACKING AIRBORNE TARGETS INCLUDING ARCTIID MOTHS
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DOI：
10.1139/z92-180
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发表时间：
1992-07-01
期刊：
影响因子：
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通讯作者：
FENTON, MB
中科院分区：
文献类型：
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作者：
ACHARYA, L;FENTON, MB
我们于1989年5月至8月、1990年和1991年观察了Lasiurus borealis和Lasiurus cinereus的回声定位和狩猎行为，以评估进食嗡嗡声在回声定位蝙蝠攻击空中猎物的行为中的作用。进食嗡嗡声由飞行蝙蝠与猎物接触之前快速产生的短回声定位脉冲组成。喂食嗡嗡声的持续时间反映了被攻击猎物的大小的假设没有得到数据的支持。成功攻击后，进食嗡嗡声结束与下一次回声定位呼叫之间的静默期平均长度明显长于不成功攻击后。然而，在这两个物种中，没有明确区分成功和不成功攻击的阈值。蝙蝠对投掷的鹅卵石和一些昆虫的反应表明，在一些进食的嗡嗡声中，蝙蝠和灰蝙蝠判断了受到攻击的猎物的性质和范围。自由飞翔的北极乳蛾对静音的牛蛾（Hypoprepia fucosa）的攻击，再加上圈养的蝙蝠拒绝将这些飞蛾作为食物，表明在这种情况下，这些飞蛾的滴答声是警告信号，警告蝙蝠这些飞蛾的味道不好。
We observed the echolocation and hunting behaviour Lasiurus borealis and Lasiurus cinereus from May to August of 1989, 1990, and 1991 to assess the role of feeding buzzes in the behaviour of echolocating bats attacking airborne prey. Feeding buzzes consist of short echolocation pulses produced at a rapid rate just before contact between a flying bat and its prey. The hypothesis that the duration of the feeding buzz reflects the size of the attacked prey was not supported by the data. The mean lengths of silent periods between the end of the feeding buzz and the next echolocation call were significantly longer after successful attacks than after unsuccessful attacks. There was, however, no threshold value unambiguously separating successful from unsuccessful attacks in either species. The responses of bats to tossed pebbles and to some insects indicated that during some feeding buzzes L. borealis and L. cinereus judged the nature and range of prey being attacked. Attacks by free-flying L. borealis on muted arctiid moths (Hypoprepia fucosa), combined with the rejection of these moths as food by captive bats, suggest that in this setting the clicks of these moths are aposematic signals, warning the bats of the moths' bad taste.