[MARMAM] New paper: Vocal activities reflect the temporal distribution of bottlenose dolphin activity

Alice Lima alimoulima at gmail.com
Tue Nov 14 05:48:51 PST 2017

Dear Colleagues,

We are very pleased to share with you our publication in the current issue
of Zoo Biology:

Lima A, Lemasson A, Boye M, Hausberger M. Vocal activities reflect the
temporal distribution of bottlenose dolphin social and non-social activity
in a zoological park. Zoo Biology. 2017;1–9.

This is the first description of the time-budget of captive dolphins using
vocal and non-vocal data. The work discuss differences in the temporal
distribution of social activities with wild animals and highlights the
impact of Human-controlled feeding schedules in captive settings.

Under natural conditions bottlenose dolphins (*Tursiops truncatus*) spend
their time mostly feeding and then travelling, socializing, or resting.
These activities are not randomly distributed, with feeding being higher in
early morning and late afternoon. Social activities and vocal behavior seem
to be very important in dolphin daily activity. This study aimed to
describe the activity time-budget and its relation to vocal behavior for
dolphins in a zoological park. We recorded behaviors and vocalizations of
six dolphins over 2 months. All subjects performed more non-agonistic
social interactions and play in the morning than in the afternoon. The
different categories of vocalizations were distributed non-randomly
throughout the day, with more chirps in the afternoon, when the animals
were “less social.” The most striking result was the strong correlation
between activities and the categories of vocalizations produced. The
results confirm the association between burst pulses and whistles with
social activities, but also reveal that both are also associated with
solitary play. More chirps were produced when dolphins were engaged in
socio-sexual behaviors, emphasizing the need for further questioning about
the function of this vocal category. This study reveals that: (i) in a
group kept in zoological management, social activities are mostly present
in the morning; and (ii) the acoustic signals produced by dolphins may give
a reliable representation of their current activities. While more studies
on the context of signal production are needed, our findings provide a
useful tool for understanding free ranging dolphin behavior when they are
not visible.

The paper can be found here:

Or send any requests for copies directly to alice.lima at univ-rennes1.fr

Best wishes,

Alice Lima

Alice de Moura Lima
Bióloga - Mestre em Zoologia - PPGZOO/UESC
Doctorante / PhD Student
Université de Rennes 1
UMR CNRS 6552 "Ethologie Animale et Humaine"
Station Biologique de Paimpont
35380 Paimpont
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