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摘要 : 2016年9月12日,国际学术权威刊物自然出版集团旗下子刊《Scientific Reports》杂志在线发表了瑞士巴塞尔大学Daniel Haag-Wackernagel研究员的一篇研究论文,研究观测到某些种类的鱼会迫使这种像蠕虫一样的威胁物撤退到沙子中。

2016年9月12日,国际学术权威刊物自然出版集团旗下子刊《Scientific Reports》杂志在线发表了瑞士巴塞尔大学Daniel Haag-Wackernagel研究员的一篇研究论文,研究观测到某些种类的鱼会迫使这种像蠕虫一样的威胁物撤退到沙子中。




Novel mobbing strategies of a fish population against a sessile annelid predator


When searching for food, foraging fishes expose themselves to hidden predators. The strategies that maximize the survival of foraging fishes are not well understood. Here, we describe a novel type of mobbing behaviour displayed by foraging Scolopsis affinis. The fish direct sharp water jets towards the hidden sessile annelid predator Eunice aphroditois (Bobbit worm). We recognized two different behavioural roles for mobbers (i.e., initiator and subsequent participants). The first individual to exhibit behaviour indicating the discovery of the Bobbit directed, absolutely and per time unit, more water jets than the subsequent individuals that joined the mobbing. We found evidence that the mobbing impacted the behaviour of the Bobbit, e.g., by inducing retraction. S. affinis individuals either mob alone or form mobbing groups. We speculate that this behaviour may provide social benefits for its conspecifics by securing foraging territories for S. affinis. Our results reveal a sophisticated and complex behavioural strategy to protect against a hidden predator.

来源: Scientific Reports 浏览次数:0


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