Mapping the free-swimming attack volume of a planktonic copepod, Euchaetarimana
Mapping the free-swimming attack volume of a planktonic copepod, Euchaetarimana
复制标题
绘制浮游桡足类 Euchaetarimana 的自由游动攻击体积图
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Yen J.
中科院分区：
文献类型：
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作者：
Doall M.;Strickler J.;Fields D.;Yen J.
抽象的。浮游桡足类的能力，发现和追求远程猎物是有据可查的，但没有经验的三维（3D）的感觉领域的描述。在本研究中，通过绘制被攻击猎物的位置，在一个标准化的三维坐标系中定义的体轴定义的Echaetarimana Bradford，一个反刺哲水蚤桡足类Echaetarimana Bradford雌性的攻击体积。rimana。这项分析是使用录像观察捕食之间的相互作用自由游泳E。rimana和较小的桡足类物种。攻击E。rimana是一个定向反应，准确地指向远程猎物在一个椭圆体体积前其配对的第一触角。这一攻击量包围了从第一触角向前突出的大mechanosensory刚毛，攻击距离平均为1.5 mm，或小于一个体长的捕食者。E. rimana攻击一个较大的猎物物种，Acartiafossae，在显着更长的距离比它攻击一个较小的物种，Acrocalanusinermi，反映猎物特定的感知量。这种感知偏差可能是在E. rimana和其他桡足类物种。这些观察结果与捕食者识别和定位的机械感觉机制一致，表明流体扰动为E.在捕食性互动中的rimana。本文的电子补充材料可通过位于http://dx.doi.org/10.1007/s00227-001-0735-z的Springer LINK服务器获得。
Abstract. The ability of planktonic copepods to detect and pursue remote prey is well documented, but there are no empirical descriptions of their three-dimensional (3D) sensory fields. In this study, the attack volume of females of Euchaetarimana Bradford, a planktonic calanoid copepod, was mapped by plotting the positions of attacked prey within a standardized 3D coordinate system defined by the body axes of E. rimana. This analysis was performed using videotaped observations of predatory interactions between free-swimming E. rimana and smaller copepod species. Attack by E. rimana was an oriented response, accurately directed toward remote prey within an ellipsoidal volume anterior to its paired first antennules. This attack volume enveloped the large mechanosensory setae projecting anteriorly from the first antennules, with attack distances averaging 1.5 mm, or less than one body length of the predator. E. rimana attacked a larger prey species, Acartiafossae, at significantly longer distances than it attacked a smaller species, Acrocalanusinermi, reflecting prey-specific perceptive volumes. Such perceptual biases may underlie the selective feeding patterns observed in E. rimana and other copepod species. These observations are consistent with mechanosensory mechanisms of prey identification and localization, suggesting that fluid disturbances provide the releasing and directing stimuli for E. rimana during predatory interactions. Electronic supplementary material to this paper can be obtained by using the Springer LINK server located at http://dx.doi.org/10.1007/s00227-001-0735-z.