Guiana dolphins use mangrove margins as a natural barrier to chase fish prey

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Julia C. Pierry, Maria E. Morete, Emygdio L. A. Monteiro-Filho, Clarissa R. Teixeira
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Abstract

The behavioral plasticity among and within cetacean species can be driven by their prey sources, local adaptations to environmental features, and/or interactions with human activities. One of the tactics displayed by cetaceans is the barrier feeding, in which individuals or groups herd fish schools against natural and non-natural barriers to restrict movements of their prey. Coastal odontocetes, for example, are known for using shorelines and underwater slopes to trap their prey. Here, we documented two distinct populations of Guiana dolphin using the mangrove margins as a natural barrier to herd and capture fish. The observations took place in the Cananéia estuary, São Paulo State, southeastern Brazil, and in the Paranaguá estuary, Paraná State, southern Brazil. A total of 63 dolphins over eight encounters were observed performing six different events using mangroves as a natural barrier, summing both study areas. These findings not only expand our understanding of the behavior plasticity of the species but also call attention to the importance of the mangrove ecosystem directly to Guiana dolphins and indirectly to the components of their food web.

Abstract Image

Abstract Image

圭亚那海豚利用红树林边缘作为天然屏障追逐鱼类猎物
鲸类动物之间和物种内部的行为可塑性受其猎物来源、对环境特征的局部适应以及与人类活动的相互作用等因素的驱动。鲸类动物表现出的一种策略是屏障喂养,在这种策略中,个体或群体将鱼群驱赶到自然和非自然的屏障上,以限制猎物的活动。例如,海岸齿螈以利用海岸线和水下斜坡来捕获猎物而闻名。在这里,我们记录了两个截然不同的圭亚那海豚种群,它们利用红树林边缘作为放牧和捕获鱼类的天然屏障。观测在巴西东南部圣保罗州的canan河口和巴西南部帕拉纳州的帕拉纳瓜河口进行。共观察到63只海豚在8次相遇中以红树林作为自然屏障进行了6次不同的活动,将两个研究区域相加。这些发现不仅扩大了我们对物种行为可塑性的理解,而且还引起了人们对红树林生态系统对圭亚那海豚的重要性的关注,并间接地引起了对它们食物网组成部分的关注。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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