The influence of social affiliation on individual vocal signatures of northern resident killer whales ( Orcinus orca )
- 8 August 2006
- journal article
- research article
- Published by The Royal Society in Biology Letters
- Vol. 2 (4), 481-484
- https://doi.org/10.1098/rsbl.2006.0517
Abstract
Northern resident killer whales ( Orcinus orca ) live in highly stable groups and use group-specific vocal signals, but individual variation in calls has not been described previously. A towed beam-forming array was used to ascribe stereotyped pulsed calls with two independently modulated frequency contours to visually identified individual killer whales in Johnstone Strait, British Columbia. Overall, call similarity determined using neural networks differed significantly between different affiliation levels for both frequency components of all the call types analysed. This method distinguished calls from individuals within the same matriline better than different calls produced by a single individual and better than by chance. The calls of individuals from different matrilines were more distinctive than those within the same matriline, confirming previous studies based on group recordings. These results show that frequency contours of stereotyped calls differ among the individuals that are constantly associated with each other and use group-specific vocalizations, though across-group differences were substantially more pronounced.This publication has 15 references indexed in Scilit:
- Stability and group specificity of stereotyped whistles in resident killer whales, Orcinus orca, off British ColumbiaAnimal Behaviour, 2006
- Call-type matching in vocal exchanges of free-ranging resident killer whales, Orcinus orcaAnimal Behaviour, 2004
- Wild Chimpanzees Produce Group‐Specific Calls: a Case for Vocal Learning?Ethology, 2004
- Quantifying complex patterns of bioacoustic variation: Use of a neural network to compare killer whale (Orcinus orca) dialectsThe Journal of the Acoustical Society of America, 1999
- A small towed beamforming array to identify vocalizing resident killer whales (Orcinus orca) concurrent with focal behavioral observationsDeep Sea Research Part II: Topical Studies in Oceanography, 1998
- Greater spear-nosed bats discriminate group mates by vocalizationsAnimal Behaviour, 1998
- Vocal traditions among resident killer whales (Orcinus orca) in coastal waters of British ColumbiaCanadian Journal of Zoology, 1991
- Signalling systems for individual recognition: an information theory approachAnimal Behaviour, 1989
- Acoustic behaviour of resident killer whales (Orcinus orca) off Vancouver Island, British ColumbiaCanadian Journal of Zoology, 1989
- Individualized Whistle Contours in Bottle-nosed Dolphins (Tursiops truncatus)Nature, 1965