Minimal similarity in songs suggests limited exchange between humpback whales (Megaptera novaeangliae) in the southern Indian ocean

Murray, Anita, Cerchio, Salvatore, McCauley, Robert, Jenner, Curt S., Razafindrakoto, Yvette, Coughran, Douglas, McKay, Shannon and Rosenbaum, Howard 2012, Minimal similarity in songs suggests limited exchange between humpback whales (Megaptera novaeangliae) in the southern Indian ocean, Marine mammal science, vol. 28, no. 1, pp. E41-E57.

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Title Minimal similarity in songs suggests limited exchange between humpback whales (Megaptera novaeangliae) in the southern Indian ocean
Author(s) Murray, Anita
Cerchio, Salvatore
McCauley, Robert
Jenner, Curt S.
Razafindrakoto, Yvette
Coughran, Douglas
McKay, Shannon
Rosenbaum, Howard
Journal name Marine mammal science
Volume number 28
Issue number 1
Start page E41
End page E57
Total pages 17
Publisher Wiley - Blackwell Publishing
Place of publication Hoboken, N. J.
Publication date 2012-01
ISSN 0824-0469
1748-7692
Keyword(s) bioacoustics
humpback whale
Indian ocean
megaptera novaeangliae
population structure
song
Summary Comparing humpback whale song from different breeding assemblages can reveal similarities in song due to acoustically interacting males, and therefore indirectly test whether males from different breeding sites are mixing. Northern Hemisphere song comparisons illustrated that whales within ocean basins share similar songs and are subpopulations within a larger population, whereas whales in different ocean basins are isolated populations and therefore do not share songs. During the 2006 breeding season, recordings were collected in Madagascar and Western Australia, and were compared visually plus aurally. Both regions shared one theme, whereas each region had four and six private themes, respectively. This study had a substantially low number of shared themes. The co-occurrence of one theme was interpreted as an indication of limited exchange between these breeding assemblages, and we speculate that limited song similarity is due to inter-oceanic interactions. Male(s) from an Indian Ocean breeding group could be exposed to novel song when they geographically overlap, and acoustically interact, with males from a different ocean basin. Novel song could induce rapid temporal changes as new song content is incorporated, thereby minimizing song similarities between that breeding group and other Indian Ocean breeding groups that were not exposed to the novel song.
Language eng
Field of Research 069999 Biological Sciences not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2011, by the Society for Marine Mammalogy
Persistent URL http://hdl.handle.net/10536/DRO/DU:30046900

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