Data

2015 Aerial survey data of southern right whales (Eubalaena australis) off southern Australia

Australian Antarctic Data Centre
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=info:doi10.4225/15/57EC70C5D9507&rft.title=2015 Aerial survey data of southern right whales (Eubalaena australis) off southern Australia&rft.identifier=10.4225/15/57EC70C5D9507&rft.publisher=Australian Antarctic Data Centre&rft.description=These aerial survey data of southern right whales (Eubalaena australis) off southern Australia were collected in September 2015. Such annual flights in winter/spring between Cape Leeuwin (Western Australia) and Ceduna (South Australia) have now been conducted over a 23-year period 1993-2015. 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. A data update was provided in August, 2020 to correct some incorrectly given longitude values.&rft.creator=BANNISTER, JOHN &rft.creator=DOUBLE, MIKE &rft.date=2016&rft.coverage=northlimit=-29.993; southlimit=-36.59789; westlimit=113.02734; eastLimit=138.69141; projection=WGS84&rft.coverage=northlimit=-29.993; southlimit=-36.59789; westlimit=113.02734; eastLimit=138.69141; projection=WGS84&rft_rights=Please acknowledge John Bannister Western Australian Museum This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=NESP_2015_SRW when using these data.&rft_subject=biota&rft_subject=oceans&rft_subject=BALEEN WHALES&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/VERTEBRATES&rft_subject=MAMMALS&rft_subject=CETACEANS&rft_subject=Southern Right Whales&rft_subject=Survey&rft_subject=CAMERAS&rft_subject=CESSNA 172 SKYHAWK&rft_subject=AIRCRAFT&rft_subject=GEOGRAPHIC REGION > POLAR&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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Please acknowledge John Bannister Western Australian Museum This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=NESP_2015_SRW when using these data.

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These data are publicly available upon request to the Australian Antarctic Data Centre.

Brief description

These aerial survey data of southern right whales (Eubalaena australis) off southern Australia were collected in September 2015. Such annual flights in winter/spring between Cape Leeuwin (Western Australia) and Ceduna (South Australia) have now been conducted over a 23-year period 1993-2015. 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.

A data update was provided in August, 2020 to correct some incorrectly given longitude values.

Issued: 2016-09-26

Data time period: 2015-02-09 to 2015-07-09

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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: northlimit=-29.993; southlimit=-36.59789; westlimit=113.02734; eastLimit=138.69141; projection=WGS84

Subjects
AIRCRAFT | ANIMALS/VERTEBRATES | BALEEN WHALES | BIOLOGICAL CLASSIFICATION | CAMERAS | CESSNA 172 SKYHAWK | CETACEANS | CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA | EARTH SCIENCE | GEOGRAPHIC REGION > POLAR | MAMMALS | OCEAN > SOUTHERN OCEAN | Southern Right Whales | Survey | biota | oceans |

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AU-ANL:PEAU : http://nla.gov.au/nla.party-617536

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