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鱼类中的照明调节的集体运动.

Baptiste Lafoux1, Jeanne Moscatelli2, Ramiro Godoy-Diana3

  • 1Laboratoire de Physique et Mécanique des Milieux Hétérogènes (PMMH), CNRS UMR 7636, ESPCI Paris-PSL Research University, Sorbonne Université-Université Paris Cité, 10 rue Vauquelin, 75005, Paris, France. baptiste.lafoux@espci.fr.

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概括

照明对于鱼类的学校教育至关重要. 视力使鱼群中的集体运动具有凝聚力,而侧线系统不足以在低光条件下维持群体结构.

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科学领域:

  • 动物行为 动物行为
  • 集体动态的集体动态
  • 生物物理学的生物物理.

背景情况:

  • 在生物系统中,集体运动是常见的.
  • 鱼群培养背后的感官机制尚未完全理解.
  • 视觉线索被假设在协调群体行为的过程中起着重要作用.

研究的目的:

  • 实验性地研究照明强度对鱼群集体动态的影响.
  • 确定对凝聚力集团形成和维护的愿景的必要性.
  • 为了比较视觉和侧线感应在鱼群行为中的作用.

主要方法:

  • 在一个大群体中使用顺序参数量化学校结构 (约. 50个个体) 的Hemigrammus rhodostomus.
  • 控制环境光强度以改变鱼的视野范围.
  • 分析了不同亮度的群体凝聚力,对齐和配置 (偏振,磨削) 的变化.

主要成果:

  • 在低光水平下,鱼群未能形成一个凝聚力的群体.
  • 增加的照明度与更高的学校对齐相关.
  • 较高的光强度导致极化状态和稳定的旋转削配置.

结论:

  • 视觉对于在自由游泳鱼群中实现凝聚力的集体运动至关重要.
  • 仅靠近距离的横线传感就不足以在这些条件下维持学校结构.
  • 这项研究提供了对驱动生物系统集体运动的感觉机制的洞察.