Escape responses of copepod nauplii in the flow field of the blue mussel, Mytilus edulis
Escape responses of copepod nauplii in the flow field of the blue mussel, Mytilus edulis
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蓝贻贝流场中桡足类无节幼体的逃逸反应
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
T. Kiørboe
中科院分区：
文献类型：
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作者：
S. Green;André W. Visser;Josefin Titelman;T. Kiørboe
双壳类动物是浅水中浮游植物的重要食草动物。然而，人们对它们捕获活跃移动的浮游动物的能力知之甚少。我们通过视频观察和孵化实验，研究了蓝贻贝流场中三种桡足类物种（Acaria tonsa、Temora longicornis 和 Eurytemora affinis）的早期和晚期无节幼体的逃逸反应和成功率。创建了一个经验模型来描述流体变形率的空间分布。无节幼体以平均流体变形率为 0.6–1.9 s−1 的逃逸跳跃做出响应。不同类群的逃逸成功率不同。 T. longicornis 是最差的逃逸者，而 A. tonsa 和 E. affinis 则效率更高且彼此相似。流场不同部分的变形率不同，导致各部分之间的逃生成功率存在差异。无节幼体最常在距呼出虹吸管最远的区域捕获，此处变形率最弱。在那里，无节幼体无法及时检测到逃逸信号以做出反应并逃跑。
Bivalves are important grazers on phytoplankton in shallow waters. However, very little is known about their ability to capture actively moving zooplankton. We investigated the escape response and success of early and late nauplii of three copepod species (Acartia tonsa, Temora longicornis and Eurytemora affinis) in the flow field of a blue mussel, Mytilus edulis, using both video observations and incubation experiments. An empirical model was created to describe the spatial distribution of the fluid deformation rate. Nauplii responded with escape jumps at mean fluid deformation rates of 0.6–1.9 s−1. Escape success differed between taxa. T. longicornis was the poorest escaper, while A. tonsa and E. affinis were more efficient and similar to one another. Deformation rates differed in different parts of the flow field, which resulted in differences in escape success between the sectors. Nauplii were caught most often in the sector furthest away from the exhalent siphon, where the deformation rate was the weakest. There the nauplii were unable to detect an escape signal in time to react and flee.