[MARMAM] New publication: First Results of an Underwater 360° HD Audio-Video Device for Etho-Acoustical Studies on Bottlenose Dolphins (Tursiops truncatus)

Juliana Lopez Marulanda juliana.lopez-marulanda at u-psud.fr
Wed Mar 15 09:15:14 PDT 2017

> Dear MARMAM subscribers,
> We are pleased to announce our recent publication:
> López-Marulanda J., Adam O., Blanchard T., Vallée M., Cazau D., 
> Delfour F. (2017) . First results of an underwater 360° HD audio-video 
> device for etho-acoustical studies on bottlenose dolphins (/Tursiops 
> truncatus/). Aquatic Mammals. 43(2), 162-176 DOI: 
> https://doi.org/10.1578/AM.43.2.2017.162
> http://aquaticmammalsjournal.org/index.php?option=com_content&view=article&id=1648:first-results-of-an-underwater-360-hd-audio-video-device-for-etho-acoustical-studies-on-bottlenose-dolphins-tursiops-truncatus&catid=159&Itemid=326
> Abstract:
> Bottlenose dolphins (Tursiops truncatus) are highly social odontocetes 
> that live in a fission-fusion society and demonstrate production of a 
> varied sound repertoire, including clicks, whistles, and burst-pulsed 
> sounds, as well as a diverse behavioral repertoire. To better 
> understand the species’ behavior, it is necessary to compare visual 
> and acoustic observations and link vocalizations to individuals and 
> their specific actions. However, the task of linking sounds 
> to individual dolphins is challenging for human observers because 
> dolphins do not always display specific visual cues when producing a 
> sound, and also because human hearing is not naturally adapted to 
> locate underwater sound sources. To respond to these challenges, a new 
> underwater 360° HD audio-video device, the BaBeL, was designed and 
> built. This device consists of a five-hydrophone array attached to two 
> wide-angle video cameras that together cover a 360° field of vision. 
> Acoustic recordings were analyzed with a customized program to detect 
> and localize sound sources and to identify individual vocalizing 
> dolphins. Data from a population of bottlenose dolphins were collected 
> during 14 boat surveys along the northwest coast of Reunion Island 
> (France) by following a strict pre-established protocol to standardize 
> data collection. A total of 21 min of audio-video were recorded when 
> dolphins were present, and 42 click trains and 42 whistles were 
> detected from these data. Dolphins identified as vocalizers were also 
> present for 17% (n = 7) of emitted click trains and 33% (n = 14) of 
> emitted whistles on the videos. Therefore, an analysis of three video 
> sequences as examples of the scope of this methodology is presented. 
> The results show that when the observers stayed ahead and avoided the 
> direct path of groups of five to nine dolphins, only one animal 
> emitted click trains while swimming towards the observers or after 
> turning its rostrum in the humans’ direction, and this dolphin was 
> never the one leading the group. The benefits of using this 
> audio-video device for underwater observations of dolphins in clear 
> water with good visibility are discussed.
> Please contact me by email (juliana.lopez-marulanda at u-psud.fr 
> <mailto:juliana.lopez-marulanda at u-psud.fr>) for the full text.
> I will be glad to send you a pdf copy.
> Kind regards,
> Université Paris-Sud 	*Juliana LOPEZ MARULANDA*
> PhD student
> Bioacoustic Communication Team (http://www.cb.u-psud.fr/index.html)
> Institut de NeuroScience Paris Saclay (NeuroPSI), UMR 9197
> Bât 446 Rue Claude Bernard
> Université Paris-Sud
> 91405 Orsay cedex
> Tel. : 01 69 15 49 64

Juliana López Marulanda
Institut de NeuroScience Paris Saclay (NeuroPSI), UMR 9197
Bât 446
Rue Claude Bernard
Université Paris-Sud
91405 Orsay cedex
Tel. : 01 69 15 49 64

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