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首页> 外文期刊>Ecological research >No diapause prolongation response of Daphnia in the presence of planktivorous mosquitofish (Gambusia holbrooki)
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No diapause prolongation response of Daphnia in the presence of planktivorous mosquitofish (Gambusia holbrooki)

机译：在浮游性蚊虫（Gambusia holbrooki）的存在下，水蚤没有滞育延长反应。

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摘要

Recent research suggests that planktonic organisms in resting stages can perceive predators chemically and delay hatching to evade predation. Using a co-occurring predator-prey pair (Gambusia holbrooki Girard and Daphnia curvirostris Eylmann) from a Mediterranean floodplain wetland, this study tested for such predator-avoidance behaviour of Daphnia. Results show that hatching patterns of Daphnia were not reduced by the presence of different biomass levels of Gambusia. This could be due to the fact that the density of Gambusia in the wetland is high from late spring to late autumn, suggesting that delayed hatchlings would face increased mortality through consumptive predation.
机译：最近的研究表明，处于静止期的浮游生物可以化学感知捕食者并延迟孵化以逃避捕食。使用来自地中海洪泛区湿地的共同出现的捕食者-捕食对（Gambusia holbrooki Girard和Daphnia curvirostris Eylmann），该研究测试了水蚤的这种避免捕食行为。结果表明，水蚤的生物量水平没有降低水蚤的孵化模式。这可能是由于从春季末到秋季末，湿地中的盖比氏菌密度很高，这说明延迟孵化的幼体将通过消耗性捕食而面临更高的死亡率。

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