Rings of power: evidence of mud ring feeding performed by Guiana dolphins

IF 1.1 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY Journal of the Marine Biological Association of the United Kingdom Pub Date : 2024-09-18 DOI:10.1017/s002531542400078x
Julia C. Pierry, Mariane B. S. Novelli, Caio N. Louzada, Emygdio L. A. Monteiro-Filho
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Abstract

To capture prey more efficiently, cetaceans can display a wide range of foraging tactics to separate individual prey. Barrier feeding tactics are performed to restrict prey movements, using natural and non-natural barriers and some species can even create barriers with their own bodies. Mud ring feeding has been observed in bottlenose dolphins in Florida Bay and in Chetumal-Corozal Bay, where ring-maker dolphins create ring-shaped mud plumes to encircle fish schools. Here, we document for the first time Guiana dolphins performing the mud ring feeding behaviour in the Cananéia estuarine system, in the southern portion of the state of São Paulo, Brazil. A total of 11 dolphins were recorded in four expeditions through aerial footage engaging in the behaviour. These findings expand our knowledge about the behavioural plasticity of the species and builds upon existing records of mud ring feeding behaviour in cetaceans.
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力量之环:圭亚那海豚进行泥环觅食的证据
为了更有效地捕获猎物,鲸目动物可以采取多种觅食策略来分离猎物个体。障碍捕食战术是利用自然和非自然的障碍物来限制猎物的行动,有些物种甚至可以用自己的身体制造障碍物。在佛罗里达湾和切图马尔-科罗萨尔湾的瓶鼻海豚身上观察到了泥环取食的现象,在那里,造环海豚会制造环形泥羽来包围鱼群。在这里,我们首次记录了圭亚那海豚在巴西圣保罗州南部的卡纳内亚河口系统中的泥环觅食行为。在四次考察中,通过航拍镜头共记录了 11 条海豚的这种行为。这些发现扩大了我们对该物种行为可塑性的了解,并以鲸目动物泥环取食行为的现有记录为基础。
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来源期刊
CiteScore
2.30
自引率
8.30%
发文量
68
审稿时长
3-8 weeks
期刊介绍: JMBA is an international journal, publishing original research on all aspects of marine biology. It includes pioneering work taking place today on major issues concerning marine organisms and their environment. Subjects covered include: ecological surveys and population studies of marine communities; physiology and experimental biology; taxonomy, morphology and life history of marine animals and plants; and chemical and physical oceanographic work. Included with 2010 online subscriptions: Marine Biodiversity Records.
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