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2017 Aerial survey data of southern right whales (Eubalaena australis) off southern Australia

Created 12/03/2025

Updated 12/03/2025

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These aerial survey data of southern right whales (Eubalaena australis) off southern Australia were collected in August 2017. Such annual flights in winter/spring between Cape Leeuwin (Western Australia) and Ceduna (South Australia) have now been conducted over a 25-year period 1993-2017. These surveys have provided evidence of a population trend of around 6% per year, and a current (at 2014) population size of approximately 2300 of what has been regarded as the 'western' Australian right whale subpopulation. With estimated population size in the low thousands, it is presumed to be still well below carrying capacity. No trend information is available for the 'eastern' subpopulation of animals occurring around the remainder of the southern Australian Coast, to at least as far as Sydney, New South Wales and the populations size is relatively small, probably in the low hundreds. A lower than expected 'western' count in 2015 gives weak evidence that the growth rate may be starting to show signs of slowing, though an exponential increase remains the best description of the data. If the low 2015 count is anomalous, future counts may be expected to show an exponential increase, but if it is not, modelling growth as other than simple exponential may be useful to explore in future

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Title 2017 Aerial survey data of southern right whales (Eubalaena australis) off southern Australia
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/7aa484ae-7ae0-49ba-b86f-d432218e8527
Contact Point
CSIRO Oceans & Atmosphere
metadata@aad.gov.au
Reference Period 23/08/2017 - 27/08/2017
Geospatial Coverage {"type": "Polygon", "coordinates": [[[113.02734, -36.59789], [138.69141, -36.59789], [138.69141, -29.993], [113.02734, -29.993], [113.02734, -36.59789]]]}
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