Distribution of Irrawaddy dolphins, Orcaella brevirostris, in Australian waters

Parra, G. J., Azuma, C., Preen, A. R., Corkeron, P. J. and Marsh, H. (2002) Distribution of Irrawaddy dolphins, Orcaella brevirostris, in Australian waters. Raffles Bulletin of Zoology, Supplement 10: 141-154.

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Author Parra, G. J.
Azuma, C.
Preen, A. R.
Corkeron, P. J.
Marsh, H.
Title Distribution of Irrawaddy dolphins, Orcaella brevirostris, in Australian waters
Journal name Raffles Bulletin of Zoology   Check publisher's open access policy
ISSN 0217-2445
Publication date 2002-01-01
Sub-type Article (original research)
Open Access Status File (Publisher version)
Issue Supplement 10
Start page 141
End page 154
Total pages 14
Place of publication Singapore
Publisher Natl Univ Singapore, School Biological Sciences
Language eng
Abstract Records from strandings, museum specimens, sighting databases and unpublished sightings of aerial surveys were compiled and used to review the distribution and population status of Irrawaddy dolphins, Orcaella brevirostris, in Australian waters. Stranding and museum specimen records indicate that Irrawaddy dolphins occur only in the northern half of Australia, from approximately the Brisbane River (27degrees 32'S, 152degrees 49'E) on the east coast to Broome (17degrees 57'S, 122degrees 14'E) on the west coast. Aerial surveys demonstrate that Irrawaddy dolphins occur mainly in protected, shallow, coastal waters, close to river and creek mouths, which appear to be an important habitat for the species. Irrawaddy dolphins tend to form relatively small groups of 1-10 animals with occasional aggregations of up to 14 animals. The status of Irrawaddy dolphins in Australian waters is difficult to assess, because most data have been collected opportunistically. However, the low number of sightings during aerial surveys, in comparison with observations of other sympatric marine mammals, such as Indo-Pacific humpback dolphins (Sousa chinensis), suggest that Irrawaddy dolphins are relatively uncommon in Australian waters, or possibly are inadequately sampled on aerial surveys.
Keyword Zoology
Irrawaddy dolphins
Orcaella brevirostris
aerial surveys
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Veterinary Science Publications
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Created: Sat, 26 Jan 2008, 01:43:24 EST