Waves of agitation inside anchovy schools observed with multibeam sonar: a way to transmit information in response to predation
Waves of agitation inside anchovy schools observed with multibeam sonar: a way to transmit information in response to predation
复制标题
DOI：
10.1016/j.icesjms.2006.04.023
复制
发表时间：
2006-09-01
影响因子：
3.3
通讯作者：
Gutierrez, Mariano
中科院分区：
文献类型：
--
作者：
Gerlotto, Francois;Bertrand, Sophie;Gutierrez, Mariano
大多数远洋鱼类群居生活。为了允许快速反应，例如对捕食者的攻击，这些集体结构需要行为机制来授权快速、协调的行动。考虑到一个由大量个体组成的小型远洋鱼群，协调运动和鱼群重组的一个关键前提是在整个集体结构中快速有效地传递信息的能力。当船在秘鲁水域漂流时，我们观察了凤尾鱼群的运动和对海狮攻击的反应。我们观察到的信息传递的主要过程是搅动波浪穿过大型鳀鱼鱼群的过程。这些波的平均速度（7.45 m s(-1)）远远大于本实验中测量的平均0.3 m s（-1）的校速。在骚动的浪潮过后，每个学校的内部组织都发生了巨大的变化。用地质统计学方法描述和测量了学校外部形态和内部结构的变化。研究结果表明，信息传递是学校凝聚力和可塑性的关键过程。因此，它允许远洋鱼类对它们周围环境的变化做出有效的反应，特别是对捕食者。(c) 2006年国际海洋探索理事会。Elsevier Ltd.出版。版权所有。
Most pelagic fish live in schools. To allow fast reactions, for instance to predator attacks, these collective structures require behavioural mechanisms authorizing fast, coordinated movements. Considering the large number of individuals constituting a school of small pelagic fish, a crucial premise to coordinated movements and school reorganization is an ability to transfer quickly and efficiently information across the whole collective structure. We observed anchovy school movements and reactions to sea-lion attacks while the ship was drifting in Peruvian waters. The main process of information transfer we could observe was that of waves of agitation crossing large anchovy schools. The average speed of these waves (7.45 m s(-1)) was much greater than the average 0.3 m s(-1) school speeds measured during this experiment. The internal organization of each school modified dramatically after the waves of agitation had crossed them. Changes in school external morphology and internal structure were described and measured using geostatistics. Our results show that information transfer is a crucial process for the cohesion and plasticity of schools. As such, it allows efficient reactions of schools of pelagic fish to variations in their immediate environment in general, and to predation in particular. (c) 2006 International Council for the Exploration of the Sea. Published by Elsevier Ltd. All rights reserved.