Data

2021 Aerial survey data of southern right whales (Eubalaena australis) off southern Australia

Australian Antarctic Division
Smith, J. and Double, M. ; SMITH, JOSH ; 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=http://data.aad.gov.au/metadata/NESP_2021_SRW&rft.title=2021 Aerial survey data of southern right whales (Eubalaena australis) off southern Australia&rft.identifier=http://data.aad.gov.au/metadata/NESP_2021_SRW&rft.publisher=Australian Antarctic Data Centre&rft.description=Aerial surveys of southern right whales (Eubalaena australis) were undertaken off the southern Australian coast to monitor the recovery of this endangered species following extreme 19th and 20th Century commercial whaling. The aerial survey was undertaken in the coastal waters from Perth (Western Australia) to Ceduna (South Australia) between the 12th and 17th August 2021, to maintain the annual series of surveys and inform the long-term population trend. The maximum whale counts for each leg of the survey flights between Cape Leeuwin and Ceduna, and consisted of a total 643 southern right whales sighted across the survey area (270 cow-calf pairs and 103 unaccompanied whales). The subsequent population estimate for the Australian ‘south-western’ population is 2,549 whales, which represents the majority of the Australian population given the very low numbers in the ‘south-eastern’ subpopulation. The population long-term trend data is indicating recent years (from 2007) are showing greater inter-annual variation in whale counts. To evaluate the recovery of the southern right whale population, it will be critical to collect long-term data on the annual variability in whale numbers related to the non-annual female breeding cycle and identify possible impacts on this by short-term climate dynamics, longer-term climate change and/or anthropogenic threats.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=Smith, J. and Double, M. &rft.creator=SMITH, JOSH &rft.creator=DOUBLE, MIKE &rft.date=2022&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=These data are publicly available for download from the provided URL.&rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights=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_2021_SRW when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=oceans&rft_subject=biota&rft_subject=EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CETACEANS > BALEEN WHALES&rft_subject=SOUTHERN RIGHT WHALES&rft_subject=AERIAL SURVEY&rft_subject=CAMERAS&rft_subject=CESSNA 172 SKYHAWK&rft_subject=AMD/AU&rft_subject=AMD&rft_subject=CEOS&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA&rft_subject=GEOGRAPHIC REGION > POLAR&rft.type=dataset&rft.language=English Access the data
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Attribution 4.0 International (CC BY 4.0)
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These data are publicly available for download from the provided URL.

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_2021_SRW when using these data.

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Full description

Aerial surveys of southern right whales (Eubalaena australis) were undertaken off the southern Australian coast to monitor the recovery of this endangered species following extreme 19th and 20th Century commercial whaling. The aerial survey was undertaken in the coastal waters from Perth (Western Australia) to Ceduna (South Australia) between the 12th and 17th August 2021, to maintain the annual series of surveys and inform the long-term population trend. The maximum whale counts for each leg of the survey flights between Cape Leeuwin and Ceduna, and consisted of a total 643 southern right whales sighted across the survey area (270 cow-calf pairs and 103 unaccompanied whales). The subsequent population estimate for the Australian ‘south-western’ population is 2,549 whales, which represents the majority of the Australian population given the very low numbers in the ‘south-eastern’ subpopulation. The population long-term trend data is indicating recent years (from 2007) are showing greater inter-annual variation in whale counts. To evaluate the recovery of the southern right whale population, it will be critical to collect long-term data on the annual variability in whale numbers related to the non-annual female breeding cycle and identify possible impacts on this by short-term climate dynamics, longer-term climate change and/or anthropogenic threats.

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: 2021-08-12 to 2021-08-17

This dataset is part of a larger collection

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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

Subjects
AERIAL SURVEY | AMD | AMD/AU | CAMERAS | CEOS | CESSNA 172 SKYHAWK | CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA | EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CETACEANS > BALEEN WHALES | GEOGRAPHIC REGION > POLAR | OCEAN > SOUTHERN OCEAN | SOUTHERN RIGHT WHALES | biota | oceans |

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Download the dataset. (GET DATA > DIRECT DOWNLOAD)

uri : https://data.aad.gov.au/eds/5538/download

Citation reference for this metadata record and dataset. (VIEW RELATED INFORMATION)

uri : https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=NESP_2021_SRW

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