Data

2018 Aerial survey data of southern right whales (Eubalaena australis) off southern Australia

Australian Ocean Data Network
33 linked Records:
Bannister, J. ; BANNISTER, JOHN ; DOUBLE, MIKE
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=Dataset DOI&rft.title=2018 Aerial survey data of southern right whales (Eubalaena australis) off southern Australia&rft.identifier=Dataset DOI&rft.publisher=Australian Antarctic Data Centre&rft.description=These aerial survey data of southern right whales (Eubalaena australis) off southern Australia were collected in August 2018. Such annual flights in winter/spring between Cape Leeuwin (Western Australia) and Ceduna (South Australia) have now been conducted over a 26-year period 1993-2018. 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.Progress Code: completedStatement: Photo quality will be variable and requires assessment prior to assimilation into photo-identification catalogue http://data.marinemammals.gov.au/arwpic&rft.creator=Bannister, J. &rft.creator=BANNISTER, JOHN &rft.creator=DOUBLE, MIKE &rft.date=2020&rft.coverage=westlimit=113.02734; southlimit=-36.59789; eastlimit=138.69141; northlimit=-29.993&rft.coverage=westlimit=113.02734; southlimit=-36.59789; eastlimit=138.69141; northlimit=-29.993&rft_rights=This metadata record is publicly available.&rft_rights=These data are publicly available for download from the provided URL.&rft_rights=Please acknowledge John Bannister Western Australian Museum This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=NESP_2018_SRW when using these data. http://creativecommons.org/licenses/by/3.0/).&rft.type=dataset&rft.language=English Access the data
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CC-BY

Please acknowledge John Bannister Western Australian Museum

This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=NESP_2018_SRW when using these data.
http://creativecommons.org/licenses/by/3.0/).

This metadata record is publicly available.

These data are publicly available for download from the provided URL.

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metadata@aad.gov.au

Brief description

These aerial survey data of southern right whales (Eubalaena australis) off southern Australia were collected in August 2018. Such annual flights in winter/spring between Cape Leeuwin (Western Australia) and Ceduna (South Australia) have now been conducted over a 26-year period 1993-2018. 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.

Lineage

Progress Code: completed
Statement: Photo quality will be variable and requires assessment prior to assimilation into photo-identification catalogue
http://data.marinemammals.gov.au/arwpic

Notes

Purpose
Assessing the status and trend of Australia's southern right whale populations.

Data time period: 2018-08-18 to 2018-08-23

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138.69141,-29.993 138.69141,-36.59789 113.02734,-36.59789 113.02734,-29.993 138.69141,-29.993

125.859375,-33.295445

text: westlimit=113.02734; southlimit=-36.59789; eastlimit=138.69141; northlimit=-29.993

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uri : http://data.aad.gov.au/eds/5192/download

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