PDF(Pubmed)
Abstract：
BACKGROUND: The light organs of the splitfin flashlight fish Anomalops katoptron are necessary for schooling behavior, to determine nearest neighbor distance, and to feed on zooplankton under dim light conditions. Each behavior is coupled to context-dependent blink frequencies and can be regulated via mechanical occlusion of light organs. During shoaling in the laboratory individuals show moderate blink frequencies around 100 blinks per minute. In this study, we correlated bioluminescent blinks with the spatio-temporal dynamics of swimming profiles in three dimensions, using a stereoscopic, infrared camera system.
RESULTS: Groups of flashlight fish showed intermediate levels of polarization and distances to the group centroid. Individuals showed higher swimming speeds and curved swimming profiles during light organ occlusion. The largest changes in swimming direction occurred when darkening the light organs. Before A. katoptron exposed light organs again, they adapted a nearly straight movement direction.
CONCLUSIONS: We conclude that a change in movement direction coupled to light organ occlusion in A. katoptron is an important behavioral trait in shoaling of flashlight fish.
RESULTS: Groups of flashlight fish showed intermediate levels of polarization and distances to the group centroid. Individuals showed higher swimming speeds and curved swimming profiles during light organ occlusion. The largest changes in swimming direction occurred when darkening the light organs. Before A. katoptron exposed light organs again, they adapted a nearly straight movement direction.
CONCLUSIONS: We conclude that a change in movement direction coupled to light organ occlusion in A. katoptron is an important behavioral trait in shoaling of flashlight fish.
摘要：
背景：splitfin手电筒鱼Anomalopskatoptron的光器官是学校行为所必需的，为了确定最近的邻居距离，并在昏暗的光线条件下以浮游动物为食。每个行为都与上下文相关的眨眼频率相耦合，并且可以通过机械遮挡光器官来调节。在实验室的浅滩中，个体显示出中等的眨眼频率，每分钟约100次眨眼。在这项研究中,我们将生物发光眨眼与三个维度的游泳轮廓的时空动态相关联，使用立体，红外摄像系统。
结果：手电筒鱼组显示出中等水平的偏振和与组质心的距离。在轻器官闭塞期间，个体表现出更高的游泳速度和弯曲的游泳轮廓。游泳方向的最大变化发生在使光器官变暗时。在A.katoptron再次暴露光器官之前，他们适应了几乎直线的运动方向。
结论：我们得出的结论是，与A.katoptron中的光器官闭塞相关的运动方向的变化是手电筒鱼浅滩的重要行为特征。
结果：手电筒鱼组显示出中等水平的偏振和与组质心的距离。在轻器官闭塞期间，个体表现出更高的游泳速度和弯曲的游泳轮廓。游泳方向的最大变化发生在使光器官变暗时。在A.katoptron再次暴露光器官之前，他们适应了几乎直线的运动方向。
结论：我们得出的结论是，与A.katoptron中的光器官闭塞相关的运动方向的变化是手电筒鱼浅滩的重要行为特征。
