期刊
ANIMAL BEHAVIOUR
卷 97, 期 -, 页码 229-239出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.anbehav.2014.09.010
关键词
acoustic behaviour; Neophoca cinerea; otariid; pinniped; vocal communication
资金
- Macquarie University Higher Degree Research Fund
- CNRS (Orsay, France)
- Australian Marine Mammal Centre, Department of Environment, Heritage SA
- Australian Marine Mammal Centre, Department of Environment, Heritage WA
- Water and the Arts through Commonwealth Environment Research Fund [0809/12]
Vocalizing by males plays an important role in the reproductive activities of many species. Geographical variation in the characteristics of male vocalization is well studied in birds, but largely unexplored in mammals. This study quantified the extent of geographical variation in male Australian sea lion, Neophoca cinerea, barking calls and examined what drives vocal differences in this species. We recorded male barking calls from seven breeding colonies separated by ca. 5-2700 km enabling us to investigate acoustic differences on both micro- and macrogeographical scales. Our results revealed significant nonuniform geographical variation across colonies. Neither genetic nor geographical distances between colonies fully explained the observed acoustic variation. We suggest that environmental or morphological factors are likely to further contribute to differences in vocal characteristics. (C) 2014 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
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