Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2
We present an update of ageing and estimates of biological parameters, and of the integrated stock assessment for Antarctic toothfish ( Dissostichus mawsoni ) fishery in CCAMLR Divisions 58.4.1 and 58.4.2. The update of ageing and estimates of biological parameters addresses Milestone 1.10, the upda...
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ftunivtasecite:oai:ecite.utas.edu.au:155011 2023-05-15T13:42:41+02:00 Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2 Ziegler, P Miller, C Maschette, D 2022 application/pdf https://meetings.ccamlr.org/en/wg-fsa-2022/34 http://ecite.utas.edu.au/155011 en eng CCAMLR http://ecite.utas.edu.au/155011/1/155011 - Preliminary integrated stock assessment for the Antarctic toothfish.pdf Ziegler, P and Miller, C and Maschette, D, Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2, Commission for the Conservation of Antarctic Marine Living Resources, 25 September (2022) [Refereed Conference Paper] http://ecite.utas.edu.au/155011 Agricultural Veterinary and Food Sciences Fisheries sciences Fisheries management Refereed Conference Paper PeerReviewed 2022 ftunivtasecite 2023-02-20T23:17:09Z We present an update of ageing and estimates of biological parameters, and of the integrated stock assessment for Antarctic toothfish ( Dissostichus mawsoni ) fishery in CCAMLR Divisions 58.4.1 and 58.4.2. The update of ageing and estimates of biological parameters addresses Milestone 1.10, the updated of the stock assessment addresses Milestone 1.11 of the current multi-member research plan for these Divisions (WG-SAM-2021/03). The assessment model used all data available from the region, supplemented with parameter estimates from other toothfish stock assessments. Compared to the previous assessment (SC-CAMLR-39/BG/38), this model also included more tag-recapture data from Division 58.4.2, new ageing data from the 2020 and 2021 fishing seasons, and an update estimation of region-specific growth. The evaluated assessment model indicated that the Antarctic toothfish stock in Divisions 58.4.1 and 58.4.2 is unlikely to be depleted by the current level of fishing mortality. However, the model also clearly highlighted the impact of no fishing in Division 58.4.1 over the last four years. The lack of data from this Division is strongly impacting on the ability of the model to accurately estimate spawning biomass and precautionary catch levels for this exploratory toothfish fishery. Research in Divisions 58.4.1 and 58.4.2 has now progressed to a stock assessment, highlighting the value of the management procedures with a requirement for a research plan in exploratory fisheries, as agreed to by CCAMLR in 2011. However, widespread data collection in both Divisions 58.4.1 and 58.4.2 is the single biggest need in this fishery to improve the stock assessment model and allow it to be used for management advice on catch limits in the future. We therefore strongly recommend that exploratory fishing under the new research plan resume in Division 58.4.1 such that tagging and data collection can occur beyond the current limited areas in Division 58.4.2. Conference Object Antarc* Antarctic Antarctic Toothfish eCite UTAS (University of Tasmania) Antarctic The Antarctic |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Agricultural Veterinary and Food Sciences Fisheries sciences Fisheries management |
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Agricultural Veterinary and Food Sciences Fisheries sciences Fisheries management Ziegler, P Miller, C Maschette, D Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2 |
topic_facet |
Agricultural Veterinary and Food Sciences Fisheries sciences Fisheries management |
description |
We present an update of ageing and estimates of biological parameters, and of the integrated stock assessment for Antarctic toothfish ( Dissostichus mawsoni ) fishery in CCAMLR Divisions 58.4.1 and 58.4.2. The update of ageing and estimates of biological parameters addresses Milestone 1.10, the updated of the stock assessment addresses Milestone 1.11 of the current multi-member research plan for these Divisions (WG-SAM-2021/03). The assessment model used all data available from the region, supplemented with parameter estimates from other toothfish stock assessments. Compared to the previous assessment (SC-CAMLR-39/BG/38), this model also included more tag-recapture data from Division 58.4.2, new ageing data from the 2020 and 2021 fishing seasons, and an update estimation of region-specific growth. The evaluated assessment model indicated that the Antarctic toothfish stock in Divisions 58.4.1 and 58.4.2 is unlikely to be depleted by the current level of fishing mortality. However, the model also clearly highlighted the impact of no fishing in Division 58.4.1 over the last four years. The lack of data from this Division is strongly impacting on the ability of the model to accurately estimate spawning biomass and precautionary catch levels for this exploratory toothfish fishery. Research in Divisions 58.4.1 and 58.4.2 has now progressed to a stock assessment, highlighting the value of the management procedures with a requirement for a research plan in exploratory fisheries, as agreed to by CCAMLR in 2011. However, widespread data collection in both Divisions 58.4.1 and 58.4.2 is the single biggest need in this fishery to improve the stock assessment model and allow it to be used for management advice on catch limits in the future. We therefore strongly recommend that exploratory fishing under the new research plan resume in Division 58.4.1 such that tagging and data collection can occur beyond the current limited areas in Division 58.4.2. |
format |
Conference Object |
author |
Ziegler, P Miller, C Maschette, D |
author_facet |
Ziegler, P Miller, C Maschette, D |
author_sort |
Ziegler, P |
title |
Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2 |
title_short |
Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2 |
title_full |
Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2 |
title_fullStr |
Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2 |
title_full_unstemmed |
Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2 |
title_sort |
preliminary integrated stock assessment for the antarctic toothfish ( dissostichus mawsoni ) fishery in divisions 58.41 and 58.4.2 |
publisher |
CCAMLR |
publishDate |
2022 |
url |
https://meetings.ccamlr.org/en/wg-fsa-2022/34 http://ecite.utas.edu.au/155011 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Toothfish |
genre_facet |
Antarc* Antarctic Antarctic Toothfish |
op_relation |
http://ecite.utas.edu.au/155011/1/155011 - Preliminary integrated stock assessment for the Antarctic toothfish.pdf Ziegler, P and Miller, C and Maschette, D, Preliminary integrated stock assessment for the Antarctic toothfish ( Dissostichus mawsoni ) fishery in Divisions 58.41 and 58.4.2, Commission for the Conservation of Antarctic Marine Living Resources, 25 September (2022) [Refereed Conference Paper] http://ecite.utas.edu.au/155011 |
_version_ |
1766171711395332096 |