Correlation between bioluminescent blinks and swimming behavior in the splitfin flashlight fish Anomalops katoptron

IF 3.4 Q1 Agricultural and Biological Sciences
Peter Jägers, Timo Frischmuth, Stefan Herlitze
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引用次数: 0

Abstract

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. 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. 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.
裂鳍闪光鱼的生物发光闪烁与游泳行为之间的相关性
裂鳍闪光鱼(Anomalops katoptron)的光器官是在暗光条件下进行求偶行为、确定近邻距离和捕食浮游动物所必需的。每种行为都与上下文相关的眨眼频率有关,并可通过机械闭合光器官进行调节。在实验室中,个体在浅滩活动时的眨眼频率适中,约为每分钟 100 次。在这项研究中,我们利用立体红外摄像系统,将生物发光眨眼与三维游泳剖面的时空动态联系起来。成群的手电筒鱼显示出中等水平的极化和到群体中心点的距离。在光器官闭塞时,个体表现出较高的游泳速度和弯曲的游泳曲线。光器官变暗时,游动方向的变化最大。在A. katoptron再次暴露出光器官之前,它们适应了近乎笔直的运动方向。我们的结论是,在光器官闭合的情况下,A. katoptron的运动方向会发生变化,这是手电筒鱼趋滩的一个重要行为特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
BMC Evolutionary Biology
BMC Evolutionary Biology 生物-进化生物学
CiteScore
5.80
自引率
0.00%
发文量
0
审稿时长
6 months
期刊介绍: BMC Evolutionary Biology is an open access, peer-reviewed journal that considers articles on all aspects of molecular and non-molecular evolution of all organisms, as well as phylogenetics and palaeontology.
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