Predator-induced escape response in Daphnia

J. Pijanowska, Piotr Dawidowicz, L. Weider
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引用次数: 16

Abstract

We studied the effects of predator exudates on evasion efficiency in two Daphnia magna clones that differed in their sensitivity to the kairomones. Pre-expo- sure to kairomones significantly increased the chances of survival of sensitive Daphnia when confronted with actively-foraging invertebrate and vertebrate predators, as com- pared to individuals which had not been pre-exposed to predator chemical cues. The induced response is adaptive: predators foraging on a mixture of sensitized and non- sensitized individuals, first removed those which had not been pre-exposed, or were non-sensitive to predator exudates. Predator-induced escape responses, therefore, can be a target for selection.
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捕食者诱导的水蚤逃逸反应
研究了捕食者分泌物对两个对激素敏感性不同的大水蚤无性系逃避效率的影响。在面对主动觅食的无脊椎动物和脊椎动物捕食者时,与没有预先暴露于捕食者化学信号的个体相比,预先暴露于kairomones的敏感水蚤的生存机会显著增加。诱导的反应是适应性的:捕食者捕食敏感和非敏感的混合个体,首先去除那些没有预先暴露的个体,或者对捕食者分泌物不敏感的个体。因此,捕食者诱导的逃逸反应可以成为选择的目标。
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