Come dine with me: food-associated social signalling in wild bottlenose dolphins (Tursiops truncatus)
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Food-related signalling is widespread in the animal kingdom with some food-associated vocalizations considered functionally referential. Food calls can, however, vary greatly in the type of information they convey. Thus, there are a multitude of purposes for which food calls are used, including social recruitment, caller spacing, the indication of type, quantity, quality, divisibility of food, the caller’s hunger level and even as tools to manipulate prey behaviour. Yet little work has focused on the social aspect of food calling in animals. We investigated the association of social signals in wild bottlenose dolphins with foraging behaviour where context-specific food-associated calls are commonly produced. Our data showed that specific social signals were significantly correlated with food call production and these calls rarely occurred in the absence of food calls. We suggest that animals are sharing additional information on the food patch itself with their social affiliates.
KeywordsFood calls Bottlenose dolphin Signature whistles Vocal learning Call matching
We would like to thank Thomas Götz and all our field assistants for their help during this study. The project was funded by a BBSRC Studentship to S.L.K., and a Royal Society University Research Fellowship and a Fellowship of the Wissenschaftskolleg Berlin to V.M.J. It was carried out under Scottish Natural Heritage Research License number 10778. The data reported in this paper are archived at the Sea Mammal Research Unit, University of St Andrews.
- Dos Santos ME, Ferreira AJ, Harzen S (1995) Rhythmic sound sequences emitted by aroused bottlenose dolphins in the Sado estuary, Portugal. In: Kastelein RA, Thomas JA, Nachtigall PE (eds) Sensory systems of aquatic mammals. De Spil Publishers, Woerden, pp 325–334Google Scholar
- Gerhardt H, Huber F (2002) Acoustic communication in insects and frogs: common problems and diverse solutions. University of Chicago Press, ChicagoGoogle Scholar
- McGregor PK, Dabelsteen T (1996) Communication networks. In: Kroodsma DE, Miller EH (eds) Ecology and evolution of acoustic communication in birds. Comstock Publishing Associates, Ithaca, pp 409–425Google Scholar
- Ridgway SH, Moore PW, Carder DA, Romano TA (2014) Forward shift of feeding buzz components of dolphins and belugas during associative learning reveals a likely connection to reward expectation, pleasure and brain dopamine activation. J Exp Biol 217:2910–2919. doi: 10.1242/jeb.100511 PubMedCrossRefGoogle Scholar
- Staicer C, Spector D, Horn A (1996) The dawn chorus and other diel patterns in acoustic signalling. In: Kroodsma D, Miller E (eds) Ecology and evolution of acoustic communication in birds. Comstock Publishing Associates, Ithaca, pp 426–453Google Scholar
- Ugarte SM, Wahlberg M, Miller LA (2006) Icelandic killer whale Orcinus orca use a pulsed call suitable for manipulating the schooling behaviour of herring Clupea harengus. Bioacoustics 26:57–74Google Scholar