e464de1e-d674-40c0-a145-472a1eb4a7a2 urn:uuid Antarctica New Zealand adminteam@antarcticanz.govt.nz 2026-01-22T01:44:45.412Z 2023-08-15T23:00:12 ISO 19115-1 2018 https://www.ccamlr.org/en/fisheries/toothfish-fisheries Antarctic Toothfish Survey, Ross Sea 2023-08-16T11:04:05 2023-08-16T11:04:06 Knowledge of recruitment dynamics, and in particular trends in recruitment and recruitment variability, are key inputs for integrated assessments of fish stocks. A quantitative longline survey monitoring the recruitment of Antarctic toothfish (Dissostichus mawsoni) in the southern Ross Sea was started in 2012. The survey was expanded in 2016 to monitor trends and biological characteristics in two areas of importance to predators, Terra Nova Bay and McMurdo Sound, and to collect data that would contribute to the research and monitoring plan for the Ross Sea region Marine Protected Area. In most years, the survey was completed as planned, while during the covid pandemic, travel restrictions have necessitated an alternative delivery approach with a survey scientist onboard for the entire voyage throughout the Ross Sea commercial fishery and the Ross Sea Shelf Survey in 2020/21 and 2021/22. Between 2012 and 2025, 2 405 Antarctic toothfish have been tagged and released on the survey and 24 tagged toothfish have been recaptured. Fifteen pop-up satellite archival tags (PSATs) were deployed on D. mawsoni in 2019, 3 in 2024 and fifteen skates were tagged in 2020 and 2021. Many tagged toothfish released from the RSSS have moved from the shelf to the slope. Trends in abundance indices and size and age composition consistently show the progression of strong year classes entering and leaving the survey area and have indicated that recruitment is likely more variable than previously thought. Data from the Ross Sea Shelf Survey have been used to indicate year class strength in Antarctic toothfish stock assessments since 2015. The 2025 survey indicates strong recent recruitment. The surveys to date have also resulted in a substantive increase in the knowledge and understanding of the distribution and relative abundance of a range of demersal fish species and invertebrate taxa. Other data routinely collected on the surveys were plankton, temperature, salinity, air quality, cetacean and other marine mammal observations, and photo, video, and echosounder data. The Ross Sea Shelf Survey has provided synergies with other research programmes whilst also addressing CCAMLR objectives, particularly those focused on research and monitoring within the Ross Sea region Marine Protected Area. GET DATA: https://www.ccamlr.org/en/publications/statistical-bulletin Mormede, S. sofishconsulting@gmail.com ORCid Convention for the Conservation of Antarctic Marine Living Resources biota 163.2799 180.00 -78.0306 -74.6501 2012-02-04T00:00:00 2023-08-16T11:04:10 https://antcat.antarcticanz.govt.nz/geonetwork/srv/api/records/e464de1e-d674-40c0-a145-472a1eb4a7a2/attachments/antarctic_toothfish_padded.png LONGLINE K087A POPULATION DYNAMICS DEMERSAL ANIMALS/INVERTEBRATES FISHERIES GCMD Earth Science and Earth Science Services Keywords 2023-06-30 geonetwork.thesaurus.external.theme.ardc-curated_gcmd-sciencekeywords_15-2-2023-01-12 GCMD Earth Science and Earth Science Services Keywords https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords sciencekeywords https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords Ships GCMD Platform/Sources Keywords 2023-06-30 geonetwork.thesaurus.external.platform.ardc-curated_gcmd-platforms_15-2-2023-01-03 GCMD Platform/Sources Keywords https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms platforms https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms This data set conforms to the CC BY Attribution License (https://creativecommons.org/licenses/by/4.0/) Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/ https Attribution 4.0 International (CC BY 4.0) Human Readable summary of the CC BY copyright license. Creative Commons Attribution 4 Any additional comments about this dataset This data set conforms to the CC BY Attribution License (https://creativecommons.org/licenses/by/4.0/) Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/ https Attribution 4.0 International (CC BY 4.0) Human Readable summary of the CC BY copyright license. Creative Commons Attribution 4