Interactions Between Predator Kairomone and Food Level Complicate the Ecological Interpretation of Daphnia Laboratory Results
Interactions Between Predator Kairomone and Food Level Complicate the Ecological Interpretation of Daphnia Laboratory Results
复制标题
捕食者利它素与食物水平之间的相互作用使水蚤实验室结果的生态解释变得复杂
DOI：
10.1093/plankt/23.1.41
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发表时间：
2001
影响因子：
2.1
通讯作者：
A. Weber
中科院分区：
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作者：
A. Weber
研究了食物浓度对水蚤生活史性状对两种利它素的表型反应的影响。在实验中，一个克隆的Daphnia galeata被用作猎物生物，含有Chaoborus（幻影蠓）和Perca（鲈鱼）的信息化学物质（利它素）的溶液模拟了潜在捕食者的存在。食物水平和捕食者利它素对水蚤生活史表型可塑性的综合影响是复杂的。在低食物水平下，生活史性状对利它素的反应增强。例如，在Perca处理中，这导致首次繁殖的年龄更小。Chaoborus利它素的存在会降低存活率，因此在达到繁殖之前经常发生死亡。这导致了种群增长的内在速率的强烈下降，并可能导致一些水蚤种群在食物短缺期间的夏季明显下降。
The effect of food concentration on the phenotypic response of life history traits to two predator kairomones was investigated in Daphnia. For the experiment, one clone of Daphnia galeata was used as the prey organism and solutions containing infochemicals (kairomones) of Chaoborus (phantom midge) and Perca (perch) simulated the presence of potential predators. The combined effect of food level and predator kairomone on phenotypic plasticity of Daphnia life history is complex. At low food levels, the responses in life history traits to kairomones are enhanced. For example, in the Perca treatment, this leads to a younger age at first reproduction. The presence of Chaoborus kairomone decreases survival so that death often occurs before reproduction is reached. This results in a strong decrease in the intrinsic rate of population increase and might contribute to the pronounced summer decline of some Daphnia populations during periods of food shortage.
J.Chem.Soc.，Chem.Commun.(1983)
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