AVOIDANCE OF UNPALATABLE PREY BY PREDACEOUS DIVING BEETLE LARVAE - THE ROLE OF HUNGER LEVEL AND EXPERIENCE (COLEOPTERA, DYTISCIDAE)
AVOIDANCE OF UNPALATABLE PREY BY PREDACEOUS DIVING BEETLE LARVAE - THE ROLE OF HUNGER LEVEL AND EXPERIENCE (COLEOPTERA, DYTISCIDAE)
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DOI：
10.1007/bf01988908
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发表时间：
1995-03-01
影响因子：
1
通讯作者：
FORMANOWICZ, DR
中科院分区：
文献类型：
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作者：
HILEMAN, KS;BRODIE, ED;FORMANOWICZ, DR
饥饿和经验的影响，避免不可口的猎物进行了检查。捕食性潜水甲虫Dytiscus verticalis的幼虫，在两种饲养制度之一喂养后，在一系列的试验中提供可口和不可口的猎物。可口的猎物（小牛心）的消费不受饥饿或经验。避免不好吃的猎物（尾巴的红斑蝾螈viridescens）减少与饥饿的增加，与饥饿的捕食者采样不好吃的猎物更频繁。虽然整体水平的回避不同的试验，不同饥饿水平的捕食者之间的回避程度的差异保持相对恒定的试验。甲虫幼虫在36小时内（两次试验后），他们的喂养制度的增加，变得更具选择性。在另一个实验中，饥饿程度影响了甲虫幼虫抓住不好吃的蝾螈尾巴的数量，但经验没有影响。
The effects of hunger and experience on the avoidance of unpalatable prey were examined. Larvae of the predaceous diving beetle, Dytiscus verticalis, after feeding on one of two feeding regimes, were offered palatable and unpalatable prey during a series of trials. Consumption of palatable prey (calf heart) was not affected by hunger or experience. Avoidance of unpalatable prey (tails of the red-spotted newt Notophthalmus viridescens) decreased with increased hunger, with hungrier predators sampling unpalatable prey more often. Although the overall level of avoidance varied across trials, the degree of difference in avoidance between predators at different hunger levels remained relatively constant across trials. Beetle larvae responded to an increase in their feeding regime within 36 h (after two trials), by becoming more selective. In a separate experiment, hunger level affected the number of beetle larvae that seized unpalatable newt tails, but experience did not.