Data

Cetacean Observations and Survey Effort During the TEMPO IN2021_V01 Voyage

Australian Ocean Data Network
CSIRO Oceans & Atmosphere - Hobart (Associated with) CSIRO Oceans and Atmosphere - Information and Data Centre (Associated with) Data Librarian (Point of contact) Natalie Kelly (Custodian of) [email protected], (Point of contact)
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://marlin.csiro.au/geonetwork/srv/api/records/d98c7b56-2a94-49b6-8493-bd0d8bd4a1bf&rft.title=Cetacean Observations and Survey Effort During the TEMPO IN2021_V01 Voyage&rft.identifier=d98c7b56-2a94-49b6-8493-bd0d8bd4a1bf&rft.publisher=Australian Ocean Data Network&rft.description=This record describes cetacean line-transect observations collected during the Marine National Facility (MNF) RV Investigator research voyage IN2021_V01, titled “Quantifying krill abundance for krill monitoring and management off the Australian Antarctic Territory.” The voyage occurred from Hobart (TAS) to Hobart between 29 January and 24 March 2021 (AEST) as part of the 2021 TEMPO (Trends in Euphausiids off Mawson, Predators, and Oceanography) survey. While TEMPO’s primary objective was to estimate krill biomass and understand predator–krill overlap, dedicated cetacean observations were undertaken throughout the voyage to support monitoring of cetacean distribution and abundance.Four trained observers conducted line-transect distance sampling from Deck 05 using naked eye and binoculars (Fujinon 7×50 and 25×150), with a data recorder on the bridge logging effort, weather, and sightings in PAMGUARD. Observations were maintained during daylight with sea state ≤6, and continued from the bridge when conditions were poor.Combined effort included 3,612 km of formal line-transects, 153 km of informal Deck 05 effort, and 1,115 km of bridge-only effort, yielding 621 sightings of approximately 1,609 cetaceans. Humpback whales were the most frequently observed species, followed by fin whales. Non-cetacean sightings (e.g., seabirds, pinnipeds) were recorded opportunistically.&rft.creator=Anonymous&rft.date=2026&rft.coverage=westlimit=54.9035; southlimit=-68.0025; eastlimit=147.5539; northlimit=-42.8863; projection=WGS 84 (EPSG:4326)&rft.coverage=westlimit=54.9035; southlimit=-68.0025; eastlimit=147.5539; northlimit=-42.8863; projection=WGS 84 (EPSG:4326)&rft_rights=Creative Commons Attribution 4.0 (CC-BY) https://creativecommons.org/licenses/by/4.0/&rft_subject=oceans&rft_subject=Marine Planning Regions (Australia) | Australian Antarctic&rft_subject=Coastal Waters (Australia) | Tasmania Coast, TAS&rft_subject=Marine Features (Australia) | Derwent Estuary, TAS&rft_subject=Global / Oceans | Southern Ocean&rft_subject=Earth Science | Biological Classification | Animals/Vertebrates | Mammals | Cetaceans&rft_subject=Earth Science | Biological Classification | Animals/Vertebrates | Mammals | Cetaceans | Baleen Whales&rft_subject=Earth Science | Biological Classification | Animals/Vertebrates | Mammals | Cetaceans | Toothed Whales&rft_subject=Marine National Facility&rft_subject=Visual Counts/Observations&rft_subject=TEMPO: Trends in Euphausiids off Mawson, Predators, and Oceanography&rft_subject=Ship: Investigator (RV)&rft_subject=Research Voyage: IN2021_V01&rft.type=dataset&rft.language=English Access the data
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This record describes cetacean line-transect observations collected during the Marine National Facility (MNF) RV Investigator research voyage IN2021_V01, titled “Quantifying krill abundance for krill monitoring and management off the Australian Antarctic Territory.” The voyage occurred from Hobart (TAS) to Hobart between 29 January and 24 March 2021 (AEST) as part of the 2021 TEMPO (Trends in Euphausiids off Mawson, Predators, and Oceanography) survey. While TEMPO’s primary objective was to estimate krill biomass and understand predator–krill overlap, dedicated cetacean observations were undertaken throughout the voyage to support monitoring of cetacean distribution and abundance.

Four trained observers conducted line-transect distance sampling from Deck 05 using naked eye and binoculars (Fujinon 7×50 and 25×150), with a data recorder on the bridge logging effort, weather, and sightings in PAMGUARD. Observations were maintained during daylight with sea state ≤6, and continued from the bridge when conditions were poor.

Combined effort included 3,612 km of formal line-transects, 153 km of informal Deck 05 effort, and 1,115 km of bridge-only effort, yielding 621 sightings of approximately 1,609 cetaceans. Humpback whales were the most frequently observed species, followed by fin whales. Non-cetacean sightings (e.g., seabirds, pinnipeds) were recorded opportunistically.

Notes

Credit
Natalie Kelly, Australian Antarctic Division
Credit
These data were collected on the Marine National Facility (MNF) RV Investigator voyage IN2021_V01. Data is made available under a Creative Commons Attribution 4.0 International Licence, please see link. Data is supplied 'as is' without any warranty or guarantee except as required by law to be given to you. The data may not be free of error, comprehensive, current or appropriate for your particular purpose. You accept all risk and responsibility for its use. ATTRIBUTION STATEMENT: "We acknowledge the use of the CSIRO Marine National Facility (https://ror.org/01mae9353) in undertaking this research. The dataset [Insert-dataset-name-here] downloaded on [Insert-DD-Mmm-YYYY-here] was collected on voyage [Insert-voyage-name-here] by the Marine National Facility." Acknowledgment and citations should be in all forms of publication including presentations (where the acknowledgement should be on the closing slide), journals, books, reports and related research outputs.

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147.5539,-42.8863 147.5539,-68.0025 54.9035,-68.0025 54.9035,-42.8863 147.5539,-42.8863

101.2287,-55.4444

text: westlimit=54.9035; southlimit=-68.0025; eastlimit=147.5539; northlimit=-42.8863; projection=WGS 84 (EPSG:4326)

Subjects
Coastal Waters (Australia) | Tasmania Coast, TAS | Earth Science | Biological Classification | Animals/Vertebrates | Mammals | Cetaceans | Earth Science | Biological Classification | Animals/Vertebrates | Mammals | Cetaceans | Baleen Whales | Earth Science | Biological Classification | Animals/Vertebrates | Mammals | Cetaceans | Toothed Whales | Global / Oceans | Southern Ocean | Marine Features (Australia) | Derwent Estuary, TAS | Marine National Facility | Marine Planning Regions (Australia) | Australian Antarctic | Research Voyage: IN2021_V01 | Ship: Investigator (RV) | TEMPO: Trends in Euphausiids off Mawson, Predators, and Oceanography | Visual Counts/Observations | oceans |

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Other Information
Access the Cetacean Observation Data

url : https://data.aad.gov.au/metadata/AAS_4512_4600_TEMPO_Cetacean_Observations

Link to RV Investigator Survey Information

url : https://www.marine.csiro.au/data/trawler/survey_details.cfm?survey=IN2021_V01

Link to the Marine National Facility Homepage

url : https://mnf.csiro.au/

Identifiers
  • global : d98c7b56-2a94-49b6-8493-bd0d8bd4a1bf