期刊
ANIMAL COGNITION
卷 25, 期 6, 页码 1381-1392出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10071-022-01620-w
关键词
Acoustic communication; Cetaceans; Burst-pulsed sounds; Whistles; Motivational state; Social organization; Referencial labelling
This study examines the variations in the rate of social-signal production in free-ranging bottlenose dolphins and finds that it is related to the sex of the partner, mating season, and social affiliation. The study also suggests that the composition of the dyad and context-specific social-signals are influenced by seasonal changes in vocal behavior.
A fundamental question in animal behaviour is the role of vocal communication in the regulation of social interactions in species that organise themselves into social groups. Context dependence and seasonality in vocalizations are present in the communication of many species, although very little research has addressed this dependence in marine mammals. The study presented here examined variations in the rate at which free-ranging dyads of bottlenose dolphins emit social-signals in an effort to better understand the relationship between vocal communication and social context. The results demonstrate that changes in the social-signal production in bottlenose dolphins are related to the sex of the partner, mating season and social affiliation between the components of the dyad. In a context of foraging behaviour on the same feeding ground, mixed (male-female) dyads were found to emit more pulsed burst sounds during the mating season. Another relevant aspect of the study seems to be the greater production of agonistic social-signals in the dyads formed by individuals with a lower degree of social affiliation. Overall, this study confirms a clear relationship between dyad composition and context-specific social-signals that could reflect the motivational state of individuals linked to seasonal changes in vocal behaviour.
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