Bottlenose dolphin (Tursiops truncatus) calves appear to model their signature whistles on the signature whistles of community members

Fripp, Deborah; Owen, C.-S.; Quintana‐Rizzo, Ester; Shapiro, Ari; Buckstaff, Kara C.; Jankowski, Kristine; Wells, Randall S.; Tyack, Peter L.

doi:10.1007/s10071-004-0225-z

Cited by 122 publications

(115 citation statements)

References 24 publications

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“…Vocal learning allows increasing interindividual variability of signature whistles while maintaining potential group, population, or species features in the signal. In signature whistle development, an infant appears to copy a whistle that it only heard rarely and then uses a slightly modified version as its own signature whistle (16)(17)(18). This process leads to individually distinctive signature whistles but also may lead to geographic variation in whistle parameters over longer distances (28).…”

Section: Discussionmentioning

confidence: 99%

“…Although theoretically the transition from subtle variations within a call type to different call types is a continuous one, there is a noticeable distinction between species that use either end of the spectrum. Developing individually distinctive call types appears to require vocal learning (9,(16)(17)(18), which may be one reason why such calls are rare in animals.…”

Section: Animal Communication ͉ Individual Recognition ͉ Tursiops Trumentioning

confidence: 99%

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Signature whistle shape conveys identity information to bottlenose dolphins

Janik

Sayigh

Wells

2006

Proc. Natl. Acad. Sci. U.S.A.

303

256

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Bottlenose dolphins (Tursiops truncatus) develop individually distinctive signature whistles that they use to maintain group cohesion. Unlike the development of identification signals in most other species, signature whistle development is strongly influenced by vocal learning. This learning ability is maintained throughout life, and dolphins frequently copy each other's whistles in the wild. It has been hypothesized that signature whistles can be used as referential signals among conspecifics, because captive bottlenose dolphins can be trained to use novel, learned signals to label objects. For this labeling to occur, signature whistles would have to convey identity information independent of the caller's voice features. However, experimental proof for this hypothesis has been lacking. This study demonstrates that bottlenose dolphins extract identity information from signature whistles even after all voice features have been removed from the signal. Thus, dolphins are the only animals other than humans that have been shown to transmit identity information independent of the caller's voice or location.animal communication ͉ individual recognition ͉ Tursiops truncatus

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Section: Discussionmentioning

confidence: 99%

Section: Animal Communication ͉ Individual Recognition ͉ Tursiops Trumentioning

confidence: 99%

Signature whistle shape conveys identity information to bottlenose dolphins

Janik

Sayigh

Wells

2006

Proc. Natl. Acad. Sci. U.S.A.

303

256

View full text Add to dashboard Cite

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“…Synchrony among marine mammals, especially related to breathing at the surface, has been considered an indicator of social relationship (Fripp et al, 2005) and alliance membership (Connor et al, 2006). Social association has also been defined in terms of nearest neighbor identification.…”

Section: Acknowledgementsmentioning

confidence: 99%

Orchestration : the movement and vocal behavior of free-ranging Norwegian killer whales (Orcinus orca)

Shapiro¹

2008

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Studying the social and cultural transmission of behavior among animals helps to identify patterns of interaction and information content flowing between individuals. Killer whales are likely to acquire traits culturally based on their population-specific feeding behaviors and group-distinctive vocal repertoires. I used digital tags to explore the contributions of individual Norwegian killer whales to group carousel feeding and the relationships between vocal and non-vocal activity.Periods of tail slapping to incapacitate herring during feeding were characterized by elevated movement variability, heightened vocal activity and call types containing additional orientation cues. Tail slaps produced by tagged animals were identified using a rapid pitch change and occurred primarily within 20m of the surface. Two simultaneously tagged animals maneuvered similarly when tail slapping within 60s of one another, indicating that the position and composition of the herring ball influenced their behavior.Two types of behavioral sequence preceding the tight circling of carousel feeding were apparent. First, the animals engaged in periods of directional swimming. They were silent in 2 of 3 instances, suggesting they may have located other foraging groups by eavesdropping. Second, tagged animals made broad horizontal loops as they dove in a manner consistent with corralling. All 4 of these occasions were accompanied by vocal activity, indicating that this and tail slapping may benefit from social communication. No significant relationship between the call types and the actual movement measurements was found.Killer whale vocalizations traditionally have been classified into discrete call types. Using human speech processing techniques, I considered that calls are alternatively comprised of shared segments that can be recombined to form the stereotyped and variable repertoire. In a classification experiment, the characterization of calls using the whole call, a set of unshared segments, or a set of shared segments yielded equivalent performance. The shared segments required less information to parse the same vocalizations, suggesting a more parsimonious system of representation.This closer examination of the movements and vocalizations of Norwegian killer 3 whales, combined with future work on ontogeny and transmission, will inform our understanding of whether and how culture plays a role in achieving population-specific behaviors in this species. 4 ACKNOWLEDGEMENTS

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“…Watwood et al (2004) were not able to study the process of convergence, but they confirmed that males in nine alliances produced whistles that were more similar to those of their own partners than to those of any of the other males. Fripp et al (2004) provide evidence that dolphin calves in the wild model their signature whistles on those of community members, and Miksis et al (2002) show that captive dolphin calves incorporate features of manmade signals as they develop their signature whistles. This matching of novel models suggests that vocal convergence in bottlenose dolphins may represent complex vocal learning, in which dolphins learn a novel or individual-specific model as opposed to a species-specific model.…”

Section: Vocal Convergence As Animals Form a Groupmentioning

confidence: 98%

Vocal Learning and Auditory-Vocal Feedback

Tyack

2016

Vertebrate Sound Production and Acoustic Communication

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Vocal learning is usually studied in songbirds and humans, species that can form auditory templates by listening to acoustic models and then learn to vocalize to match the template. Most other species are thought to develop vocalizations without auditory feedback. However, auditory input influences the acoustic structure of vocalizations in a broad distribution of birds and mammals. Vocalizations are defined here as sounds generated by forcing air past vibrating membranes. A vocal motor program may generate vocalizations such as crying or laughter, but auditory feedback may be required for matching precise acoustic features of vocalizations. This chapter discriminates limited vocal learning, which uses auditory input to fine-tune acoustic features of an inherited auditory template, from complex vocal learning, in which novel sounds are learned by matching a learned auditory template. Two or three songbird taxa and four or five mammalian taxa are known for complex vocal learning. A broader range of mammals converge in the acoustic structure of vocalizations when in socially interacting groups, which qualifies as limited vocal learning. All birds and mammals tested use auditory-vocal feedback to adjust their vocalizations to compensate for the effects of noise, and many species modulate their signals as the costs and benefits of communicating vary. This chapter asks whether some auditory-vocal feedback may have provided neural substrates for the evolution of vocal learning. Progress will require more precise definitions of different forms of vocal learning, broad comparative review of their presence and absence, and behavioral and neurobiological investigations into the mechanisms underlying the skills.

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Bottlenose dolphin (Tursiops truncatus) calves appear to model their signature whistles on the signature whistles of community members

Cited by 122 publications

References 24 publications

Signature whistle shape conveys identity information to bottlenose dolphins

Signature whistle shape conveys identity information to bottlenose dolphins

Orchestration : the movement and vocal behavior of free-ranging Norwegian killer whales (Orcinus orca)

Vocal Learning and Auditory-Vocal Feedback

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