Acoustic features involved in the neighbour-stranger vocal recognition process in male Australian fur seals

Tripovich, J.S., Charrier, I., Rogers, T.L., Canfield, R. and Arnould, J.P.Y. 2008, Acoustic features involved in the neighbour-stranger vocal recognition process in male Australian fur seals, Behavioural processes, vol. 79, no. 1, pp. 74-80.

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Title Acoustic features involved in the neighbour-stranger vocal recognition process in male Australian fur seals
Author(s) Tripovich, J.S.
Charrier, I.
Rogers, T.L.
Canfield, R.
Arnould, J.P.Y.
Journal name Behavioural processes
Volume number 79
Issue number 1
Start page 74
End page 80
Total pages 7
Publisher Elsevier BV
Place of publication Amsterdam, Netherlands
Publication date 2008-09
ISSN 0376-6357
1872-8308
Keyword(s) acoustic
neighbour
male
recognition
stranger
vocalisation
Summary Many territorial species have the ability to recognise neighbours from stranger individuals. If the neighbouring individual is assumed to pose less of a threat, the territorial individual responds less and avoids unnecessary confrontations with familiar individuals at established boundaries, thus avoiding the costly energy expenditure associated with fighting. Territorial male Australian fur seals respond more to strangers than to neighbouring males. The present study evaluated which acoustic features were important in the neighbour–stranger recognition process in male Australian fur seals. The results reveal that there was an increase in response strength or intensity from males when they heard more bark units, indicating the importance of repetition to detect a caller. However, lengthening and shortening the inter-unit spaces, (i.e. changing the rhythm of the call) did not appear to significantly affect an animal's response. In addition, the whole frequency spectrum was considered important to recognition with results suggesting that they may vary in their importance. A call containing the dominant and surrounding harmonics was considered important to a male's ability to recognise its neighbour. Furthermore, recognition occurs even with a partial bark, but males need to hear between 25 and 75% of each bark unit from neighbouring seals. Our study highlights which acoustic features induce stronger or weaker responses from territorial males, decoding the important features in neighbour–stranger recognition.
Language eng
Field of Research 060201 Behavioural Ecology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2008
Copyright notice ©2008, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017831

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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