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Theses

Acoustic Communication and Social Behavior in Bottlenose Dolphins (Tursiops truncatus)

Abstract : Bottlenose dolphins are highly social cetaceans that strongly rely on acoustic communication and signaling. The diversity of sounds emitted by the species has been structurally classified in whistles, clicks and burst-pulsed sounds, with some whistles called « signature whistles » that are used as cohesion calls. During this thesis, we developed an easily deployable system that identifies the animal producing sound and allows simultaneous underwater behavioral observations. We tested this methodology with bottlenose dolphins infreedom and in captivity. The present doctoral thesis aims to better understand the communication of bottlenose dolphins within their social group. First, I developed two studies to describe how the signature and non-signature whistle rate of captive dolphins varies in relation to behavior and interaction with humans. Secondly, I present the design and implementation of an innovative methodology (BaBeL system) that allows the localization of vocalizing dolphins in a three-dimensional environment, and which can be used in captivity and with free-range dolphins. Finally, I present two applications of this location methodology to address research questions regarding the exploratory behavior of a young dolphin and the use of vocalizations for coordinated movements in bottlenose dolphins.
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Submitted on : Friday, February 1, 2019 - 1:03:01 AM
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Juliana Lopez Marulanda. Acoustic Communication and Social Behavior in Bottlenose Dolphins (Tursiops truncatus). Vertebrate Zoology. Université Paris Saclay (COmUE), 2018. English. ⟨NNT : 2018SACLS016⟩. ⟨tel-02002939⟩

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