Responses of prey from habitats with different predator regimes:: Local adaptation and heritability
Responses of prey from habitats with different predator regimes:: Local adaptation and heritability
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DOI：
10.1890/03-0074
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发表时间：
2004-07-01
期刊：
影响因子：
4.8
通讯作者：
Brönmark, C
中科院分区：
文献类型：
--
作者：
Åbjörnsson, K;Hansson, LA;Brönmark, C
我们的目的是通过研究捕食性鱼类的化学信号如何影响有鱼和没有鱼的池塘中的Gammarus pulex（片足类）的行为，评估大规模扩散能力有限的猎物生物是否在当地适应了普遍的捕食者制度。我们还在实验室中通过在有或没有掠食性鱼类提示的情况下孵化 F1 代来检查每个池塘的 F1 代。在一项实验中，还评估了行为回避反应的潜在好处，其中来自不同池塘和孵化器的 G. pulex 暴露于鱼类捕食中。来自鱼塘的G. pulex在暴露于鱼类信号时增加了它们的避难所使用，而来自无鱼池塘的种群则减少了它们的避难所使用。 F1一代的反应与他们的父辈相似。只有来自鱼塘种群的 F1 代在鱼水中饲养时表现出更明显的反捕食行为。此外，与无鱼池塘中的G. pulex相比，鱼池G. pulex的原始代和F1代在遭受鱼类捕食时存活时间更长，无论它们是否在有鱼的水中饲养（F1）。我们的结果表明，G. pulex 对捕食者线索的行为反应是一种遗传特征，即对普遍捕食者制度的局部适应。
We aimed to assess whether prey organisms with limited large-scale dispersal abilities are locally adapted to prevailing predator regimes by studying how chemical cues from predatory fish affected the behavior of Gammarus pulex (Amphipoda) from ponds with and without fish. We also examined, in the laboratory, the F1 generation from each pond by incubating them with or without cues from predatory fish. The potential benefits of a behavioral avoidance response were also assessed in an experiment in which G. pulex from the different ponds and incubations were exposed to fish predation. G. pulex from fish ponds increased their refuge use when exposed to fish cues, whereas populations from fishless ponds reduced their refuge use. The F1 generation responded similarly to their parents. Only the F1 generation from fish pond populations responded with more pronounced antipredatory behavior when raised in fish water. Moreover, both the original and the F1 generation of fish pond G. pulex survived longer when exposed to fish predation than those from fishless ponds, independent of whether they were raised in fish water or not (F1). Our results suggest that the behavioral response to predator cues in G. pulex is an inherited trait, i.e., a local adaptation to prevailing predator regimes.