CCAMLR-41/08 Plus d'infos |
Examen des règles d’accès et d’utilisation des données de la CCAMLR Président du groupe consultatif des services de données (GCSD)
Résumé:
Le Comité scientifique a demandé au Groupe consultatif des services de données (GCSD) de revoir les règles d’accès et d’utilisation des données de la CCAMLR et de les soumettre au symposium prévu par le Comité scientifique et aux groupes de travail pendant leurs réunions en 2022. Le présent document résume les commentaires reçus au cours du symposium 2022 du Read More
Soumis par:
Anton Van de Putte (Belgique)
Approuvé par:
Anton Van de Putte (Belgique)
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9 |
CCAMLR-41/BG/04 Plus d'infos |
Fishery Notifications 2022/23 CCAMLR Secretariat
Résumé:
The Secretariat received fishery notifications for research fisheries, exploratory fisheries for toothfish and krill fisheries for 2022/23 CCAMLR season. This paper provides a summary of all fishery notifications, with full details available to authenticated users through the CCAMLR website Fishery Notifications.
Soumis par:
Doro Forck (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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3.1 |
CCAMLR-41/BG/12 Plus d'infos |
Reconciliation of CDS data with monthly fine-scale catch and effort data CCAMLR Secretariat
Résumé:
As requested by WG-FSA-2019, a reconciliation was undertaken for all available data between the Dissostichus spp. Catch Documentation Scheme (CDS) and monthly fine-scale catch and effort data. The analysis identified that at a season level, the reconciliations had a difference of less than 5%. Further, the majority of these seasonal differences were less than 1%, with a fishery-level Read More
Soumis par:
Doro Forck (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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3.1 |
SC-CAMLR-41/19 Plus d'infos |
Propositions et commentaires concernant la mise en place d’une stratégie de gestion des ressources en krill dans la zone 48 par la révision de la gestion des pêcheries de krill dans la sous-zone 48.1 Délégation de la Fédération de Russie
Résumé:
Les résultats de la révision pratique des approches de la gestion des pêcheries en développement dans la sous-zone 48.1 réalisée par les groupes de travail en réponse aux recommandations de la Commission (CCAMLR-38, paragraphe 5.17) Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)
Approuvé par:
Svetlana Kasatkina (Fédération de Russie)
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7 |
SC-CAMLR-41/BG/01 Plus d'infos |
Catches of target species in the Convention Area CCAMLR Secretariat
Résumé:
This paper presents a brief overview of catches of target species from directed fishing on toothfish, icefish and krill in the Convention Area in 2020/21 and 2021/22 seasons and from research fishing under Conservation Measure (CM) 24-05. The CCAMLR fisheries catch limits and associated monthly catches in the 2021/22 season are also presented with dates of fisheries closures implemented by the Read More
Soumis par:
Doro Forck (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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3.1 |
SC-CAMLR-41/BG/26 Plus d'infos |
Proposal for complex acoustic and trawl surveys for the mackerel icefish (Champsocephalus gunnari) estimates in the CCAMLR Statistical Subarea 48.3 S. Kasatkina
Résumé:
Some aspects of acoustic- trawl surveys for the mackerel icefish (Champsocephalus gunnari) assessment in the CCAMLR Statistical Subarea 48.3 as fish with a semi-pelagic distribution are discussed.
It is proposed that present-day mackerel Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)
Approuvé par:
Svetlana Kasatkina (Fédération de Russie)
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5.2.1 |
SC-CAMLR-41/BG/32 Plus d'infos |
The application of electronic monitoring in CCAMLR fisheries Delegation of the United Kingdom
Résumé:
Electronic Monitoring (EM) offers the potential to reduce CCAMLR scientific observer tasking onboard vessels, while improving data quality, increasing data collection and improving observer safety. Fisheries observers should be utilised to fulfil and integrate the reporting requirements carried out by EM on these vessels, using a holistic approach. In the mid to longer Read More
Soumis par:
Georgia Robson (Royaume-Uni)
Approuvé par:
Chris Darby
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8 |
SC-CAMLR-41/BG/33 Plus d'infos |
Proposal for a Workshop to enhance the CCAMLR Ecosystem Monitoring Program (CEMP) C. Waluda, M. Collins, M. Korczak-Abshire, J.-H. Kim, G. Milinevsky, A. Kato and S. Olmastroni
Résumé:
Here we outline a proposal for a workshop to enhance the CCAMLR Ecosystem Monitoring Programme (CEMP) based on recommendations arising from WG-EMM-2022.
Soumis par:
Claire Waluda (Royaume-Uni)
Approuvé par:
Chris Darby
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6.4 |
WG-ASAM-2022/01 Plus d'infos |
Report of the Chair of the Scientific Committee on the CCAMLR Scientific Committee Symposium Chair of the Scientific Committee |
9 |
WG-FSA-2022/01 Rev. 1 Plus d'infos |
Report of the Co-conveners of the Workshop on Conversion Factors for Toothfish (Virtual Meeting, 12 and 13 April 2022) Workshop Co-conveners (Mr N. Walker (New Zealand) and Mr N. Gasco (France)) |
8 |
WG-FSA-2022/02 Plus d'infos |
Icefish spawning aggregation in the southern Weddell Sea including discussions and recommendations from WG-EMM-2022 K. Teschke, M. Eléaume, R. Konijnenberg, P. Brtnik and T. Brey
Résumé:
Working group paper WG-EMM-2022/15 (see Annex) was presented at this year’s EMM Meeting. The paper gives detailed information regarding the discovery of a breeding colony of notothenioid icefish (Neopagetopsis ionah, Nybelin 1947) of so far unprecedented extent observed in the southern Weddell Sea (Purser et al., 2022) during RV Polarstern expedition PS124 from February to Read More
Soumis par:
Marc Eléaume (France)
Approuvé par:
Marc Eléaume (France)
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6.3 |
WG-FSA-2022/03 Plus d'infos |
Fish by-catch in the krill fishery – 2022 update CCAMLR Secretariat
Résumé:
Analysis of the frequency of fish by-catch in vessel and observer data from the krill fishery is updated based on recommendations from WG-FSA-2021. A preliminary approach to estimating by-catch rates (kg fish per tonne of krill) is introduced, and, spatial and temporal patterns of fish by-catch are presented. Feedback on the approach, outlier removal method and future work is requested.
Soumis par:
Stéphane Thanassekos (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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6 |
WG-FSA-2022/04 Plus d'infos |
An update from the Secretariat on outstanding issues in krill fishery data relating to the reporting of by-catch, green weight estimation parameters and two-hourly catch reporting for continuous trawling vessels. CCAMLR Secretariat
Résumé:
This paper provides an update on issues identified in krill fishery data related to the reporting of by-catch data from Chilean and Ukrainian vessels, green weight estimation parameters reported from the Chilean vessel Betanzos and the Norwegian vessel Juvel, and the allocation of catch amounts to two-hourly trawl periods for continuous trawling vessels. For all Read More
Soumis par:
Isaac Forster (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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7 |
WG-FSA-2022/05 Plus d'infos |
Compendium of catch limit overruns from the 2018 to 2022 seasons CCAMLR Secretariat
Résumé:
This paper details the circumstances of catch limit overruns for toothfish fisheries in Subareas 88.1 and 88.2 and krill fisheries in Subarea 48.1 from 2018 to 2022 seasons, as requested by the WG-FSA 2021.
Soumis par:
Henrique Anatole (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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3.1 |
WG-FSA-2022/06 Plus d'infos |
Analysis of the risk of exceeding catch limits in the krill fishery using daily reporting CCAMLR Secretariat
Résumé:
This paper presents an analysis of the risk of exceeding catch limits in the krill fishery based on daily reporting compared to the current practice of five-day reporting to evaluate whether reporting requirements required revision. Read More
Soumis par:
Henrique Anatole (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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3.1 |
WG-FSA-2022/07 Plus d'infos |
Results from the 2022 random stratified trawl survey in the waters surrounding Heard Island in Division 58.5.2 D. Maschette, T. Lamb and P. Ziegler
Résumé:
During April 2022, the annual random stratified trawl survey (RSTS) around Heard Island and McDonald Islands (HIMI) was conducted in CCAMLR Division 58.5.2, with the completion of 165 Read More
Soumis par:
Philippe Ziegler (Australia)
Approuvé par:
Philippe Ziegler (Australia)
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4.1.2 |
WG-FSA-2022/08 Plus d'infos |
A preliminary assessment for mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2022 random stratified trawl survey D. Maschette
Résumé:
The annual random stratified trawl survey was undertaken in Division 58.5.2 in the vicinity of Heard Island and McDonald Islands during April 2022. Based on data from this survey, this paper provides a preliminary assessment for mackerel icefish (Champsocephalus gunnari) population structure, abundance and yield in Division 58.5.2 using standard CCAMLR methods (CMIX Read More
Soumis par:
Philippe Ziegler (Australia)
Approuvé par:
Philippe Ziegler (Australia)
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4.1.2 |
WG-FSA-2022/09 Plus d'infos |
Update on the Heard Island and McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Division 58.5.2 P. Ziegler
Résumé:
Based on a recommendation by WG-FSA-2021 we present an update on stock parameters, including recruitment indices from the random stratified trawl survey, and Chapman estimates of vulnerable biomass from tag-recapture data for the Patagonian toothfish (Dissostichus eleginoides) fishery in CCAMLR Division 58.5.2. These data indicate that the stock trajectory is Read More
Soumis par:
Philippe Ziegler (Australia)
Approuvé par:
Philippe Ziegler (Australia)
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4.2.2 |
WG-FSA-2022/10 Plus d'infos |
Summary of environmental data collected during the Dissostichus mawsoni exploratory fishery in East Antarctica (Divisions 58.4.1 and 58.4.2) C. Miller, T. Lamb, P. Ziegler, J. Lee, S. Chung, C. Péron and N. Gasco
Résumé:
This paper provides an overview of the deployments of Conductivity, Temperature and Depth (CTD) loggers and Benthic Video Cameras (BVCs) to fishing gear in the Dissostichus mawsoni exploratory fishery in Divisions 58.4.1 and 58.4.2 since 2015/16. This report on the collection of environmental data addresses Milestone 2 of the research plan in this fishery ( Read More
Soumis par:
Philippe Ziegler (Australia)
Approuvé par:
Philippe Ziegler (Australia)
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5.1.2 |
WG-FSA-2022/11 Plus d'infos |
Tag linking – 2022 report CCAMLR Secretariat
Résumé:
This document summarizes the method used to link releases and recaptures of tagged toothfish and skates in the Convention Area, and the current state of the database of linked tags held by the CCAMLR Secretariat. Thanks to improvements in data quality and the growing use of CCAMLR tags by Members, the quality of links has increased with time. To date, over 98% of recaptured fish have been Read More
Soumis par:
Stéphane Thanassekos (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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4.2 |
WG-FSA-2022/12 Plus d'infos |
Factors influencing conversion factors in CCAMLR toothfish fisheries CCAMLR Secretariat
Résumé:
Using Generalized Additive Mixed Models, factors recorded by SISO observers and influencing toothfish conversion factors (CFs) were examined. For both Dissostichus species, fish length, fishing location, timing and vessel were found to have signigicant effects on CFs. The relative effect of each factor differed between species, as well as the shape of their relationship with CFs, although Read More
Soumis par:
Stéphane Thanassekos (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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8 |
WG-FSA-2022/13 Plus d'infos |
2022 trend analysis – Estimates of toothfish biomass in research blocks CCAMLR Secretariat
Résumé:
We present results of the trend analysis following reviews by WG-SAM-2022. Biomass estimates for research blocks in data-limited toothfish fisheries and the resulting catch limits for the 2023 season have been determined using updated trend analysis decision rules.
Soumis par:
Stéphane Thanassekos (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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4.3 |
WG-FSA-2022/14 Plus d'infos |
CCAMLR Marine Debris Monitoring Program, 2022 CCAMLR Secretariat
Résumé:
CCAMLR monitors marine debris in the Convention Area through the Marine Debris Monitoring Program (MDMP) established in 1986. The MDMP compiles data from surveys and opportunistic sightings conducted by Members, fishing gear reported by CCAMLR Scheme of International Scientific Observation (SISO) observers as lost by fishing vessels, and marine debris observed Read More
Soumis par:
Claire Van Werven (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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6.3 |
WG-FSA-2022/15 Plus d'infos |
Preliminary analysis of seawater temperature(T) and salinity(S) in the southern part of Subarea 48.6, research blocks 3, 4 and 5 with CTD data sampled by FV Tronio in 2020 and 2021 T. Namba, R. Sarralde and J. Pompert
Résumé:
F/V Tronio conducted CTD deployments in subarea 48.6 during February-March in 2020 and 2021, using two Valeport FastCTD Profilers. The number of stations with good quality data were 14 and 13 respectively. Those data are not sufficient to analyze T and S by research block (RB). Therefore, CTD data available from other Read More
Soumis par:
Roberto Sarralde Vizuete (Espagne)
Approuvé par:
Roberto Sarralde Vizuete (Espagne)
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5.1.1 |
WG-FSA-2022/16 Plus d'infos |
Genome-wide analyses indicate a lack of population structure in Antarctic toothfish (Dissostichus mawsoni) in the Atlantic Sector of the Southern Ocean (CCAMLR Subarea 48.6). S.B. Piertney, P. Brickle, J.H.W. Pompert and A. Douglas
Résumé:
The Antarctic toothfish (Dissostichus mawsoni), a notothenioid, is endemic to the Southern Ocean and supports economically important long line fisheries. Stock discrimination is a central component of fisheries management which embraces the recognition of self-sustaining components within natural populations. The stock structure of Dissostichus mawsoni in Read More
Soumis par:
Roberto Sarralde Vizuete (Espagne)
Approuvé par:
Roberto Sarralde Vizuete (Espagne)
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5.1.1 |
WG-FSA-2022/17 Plus d'infos |
Proposal to conduct a local acoustic-trawl survey of Champsocephalus gunnari in Statistical Subarea 48.2 Delegation of Ukraine
Résumé:
Mackerel icefish (Champsocephalus gunnari) is one of the most common and widespread species of Antarctic fish. Ukraine proposes to conduct a local acoustic-trawl survey of Champsocephalus gunnari in the statistical Subarea 48.2. The main objective of the research is to determine the Read More
Soumis par:
Kostiantyn Demianenko (Ukraine)
Approuvé par:
Kostiantyn Demianenko (Ukraine)
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5.2.1 |
WG-FSA-2022/18 Plus d'infos |
Trophodynamics of the Antarctic toothfish (Dissostichus mawsoni) in the Antarctic Peninsula Subarea 48.1: prey composition and fatty acids profile K. Pérez, C. Cárdenas, F. Santa Cruz, M. González-Aravena, P. Gallardo, A. Rivero, K. Demianenko and P. Zabroda
Résumé:
The Antarctic toothfish is the largest notothenioids species in the Southern Ocean, playing a key ecological role in the trophic web, as food source for marine mammals, and as top predator in deep-sea ecosystems, structuring the population dynamics of its prey through a trophic cascade. Most ecological information on this species rely on samples from areas Read More
Soumis par:
Francisco Santa Cruz (Chili)
Approuvé par:
César Cárdenas (Chili)
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6.4 |
WG-FSA-2022/19 Plus d'infos |
A condition assessment and handling guideline for skate (Rajiforms) by-catch in longline fisheries: Lessons from the Southern Indian Ocean J. Faure, R. Jones, M. Grima, C. Péron, N. Gasco, T. Lamb, P. Ziegler and J. Cleeland
Résumé:
Elasmobranchs (sharks, skates and rays) are among the least productive fish species, which make their populations vulnerable to increased mortality. Although skates exhibit elevated vulnerability to fishing, they are commonly caught as incidental bycatch in demersal fisheries. Management measures to prevent the Read More
Soumis par:
Johanna Faure
Approuvé par:
Marc Eléaume (France)
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6.2 |
WG-FSA-2022/20 Plus d'infos |
Preliminary study on the use of the vertebrae centrum in the age determination of skates in Crozet and Kerguelen waters J. Faure, J.M. Caraguel and C. Péron
Résumé:
Skates are commonly captured as bycatch in the Patagonian toothfish (Dissostichus eleginoides) fishery occurring between 500-2000 m in Crozet and Kerguelen waters. Age data is then important to perform fishery assessment and management. However, previous age estimation on closely related species has proved to be difficult due to low calcification Read More
Soumis par:
Johanna Faure
Approuvé par:
Marc Eléaume (France)
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6.2 |
WG-FSA-2022/21 Plus d'infos |
Report on fish by-catch during Dissostichus mawsoni exploratory fishing in Divisions 58.4.1 and 58.4.2 (2016–2022) C. Péron, F. Rajaonalison and P. Ziegler
Résumé:
In this paper, we report on fish bycatch during exploratory fishing activities undertaken in Divisions 58.4.1 and 58.4.2 during the period 2016 to 2022. Fish bycatch was composed of at least 14 species or species groups. In 2021 and 2022, exploratory fishing occurred in Division 58.4.2 only, and none of the bycatch limits set in CM 33-03/A were reached. Read More
Soumis par:
Clara Péron (France)
Approuvé par:
Marc Eléaume (France)
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5.1.2 |
WG-FSA-2022/22 Plus d'infos |
Recent trends in finfish by-catch from the krill fishery in Area 48 C.D. Jones
Résumé:
Trends in finfish by-catch from the krill fishery using data reported from the fine-scale catch and effort (C1) data from 2010 to 2021 are characterized. Finfish by-catch in relation to annual reported weight, species composition and trawl technique, by subarea and Small Scale Management Units (SSMUs) is examined. The reported finfish by-catch and species composition was Read More
Soumis par:
Christopher Jones (États-Unis d'Amérique)
Approuvé par:
George Watters (États-Unis d'Amérique)
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6 |
WG-FSA-2022/23 Plus d'infos |
Developing the two-area population CASAL model for stock assessment of Antarctic toothfish (Dissostichus mawsoni) at the Subarea 48.6 T. Okuda and Y. Osawa
Résumé:
A preliminary integrated stock assessment model with considering migration between northern and southern research blocks (two-area population model) was constructed for Dissostichus mawsoni at the Subarea 48.6, using the latest data collected from blocks 2 – 5. The model is identical in scenarios about IUU fishing Read More
Soumis par:
Takehiro Okuda (Japon)
Approuvé par:
Taro Ichii
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5.1.1 |
WG-FSA-2022/24 Rev. 1 Plus d'infos |
Report of research fishing operations at Subarea 48.6 between the 2012/13 and 2021/22 fishing seasons Delegations of Japan, Spain and South Africa
Résumé:
This paper represents the report of a multi-member longline research fishing on Antarctic toothfish (Dissostichus mawsoni) in Subarea 48.6 between 2012/13 and 2021/22 fishing seasons by Japan, Spain, and South Africa. From 2012/13, the current proposal (2020/21-2022/23) is the forth of all research proposals in Subarea 48.6, namely 1st: 2012/13-2014/15 Read More
Soumis par:
Takehiro Okuda (Japon)
Approuvé par:
Taro Ichii
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5.1.1 |
WG-FSA-2022/25 Plus d'infos |
Updating the model for the variability of egg and larval transport of Antarctic toothfish under the extreme SAM event in the East Antarctic region (Divisions 58.4.1 and 58.4.2) M. Mori, K. Mizobata, K. Kusaharaand T. Okuda
Résumé:
This paper examined egg and larval transport under different SAM phases in the continental shelf-slope regions of East Antarctica using particle tracking models following the study by Mori et al. (2021). While ocean data outputs used for simulations were the same as in the last study (i.e., “COCO”), temporal and spatial resolutions of Read More
Soumis par:
Mao Mori
Approuvé par:
Taro Ichii
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5.1.2 |
WG-FSA-2022/26 Plus d'infos |
Continuing research plan for Dissostichus spp. under CM 24-01, paragraph 3, in Subarea 88.3 by Korea and Ukraine from 2021/22 to 2023/24 Delegations of the Republic of Korea and Ukraine
Résumé:
A research plan for Subarea 88.3 was commenced by Korea in 2016 under CM 24-01, New Zealand joined the proposal in 2017. The joint research proposal was for 3 years Read More
Soumis par:
Sangdeok Chung (Corée, Rép. de)
Approuvé par:
Jaebong Lee
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5.2.3 |
WG-FSA-2022/27 Plus d'infos |
Diet composition and feeding strategy of Antarctic toothfish, Dissostichus mawsoni, in the Area 88 for the exploratory longline fishery of Korea in 2022 G.W. Baeck, S. Chung and J. Lee
Résumé:
The stocks of Antarctic toothfish, Dissostichus mawsoni were a relatively economically and ecologically Read More
Soumis par:
Sangdeok Chung (Corée, Rép. de)
Approuvé par:
Jaebong Lee
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5.2.3 |
WG-FSA-2022/28 Plus d'infos |
Geographical diet variations of Antarctic toothfish (Dissostichus mawsoni) in Area 88 of CCAMLR S.R. Lee, S. Chung, J. Lee and H.-W. Kim
Résumé:
The dietary compositions of Antarctic toothfish, Dissostichus mawsoni from various research blocks in Area 88 were analyzed for three years from 2019 to 2022 using metabarcoding. As a result of metabarcoding with 1,348 stomach contents, a total of 158 prey haplotypes were obtained which belonged to 33 families and 58 genera. As shown from the previous study Read More
Soumis par:
Sangdeok Chung (Corée, Rép. de)
Approuvé par:
Jaebong Lee
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5.2.3 |
WG-FSA-2022/29 Rev. 1 Plus d'infos |
Population genetic structure of Antarctic toothfish, Dissostichus mawsoni from Subareas 88 in the Antarctic Ocean based on 21 microsatellite markers H.-K. Choi, H. Park, S. Chung, J. Lee and H.J. Lee
Résumé:
The Antarctic toothfish, Dissostichus mawsoni, serves as a valuable fishery resource around the Antarctic Ocean, which has been managed by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) since 1997. Although defining genetic population structure of this species is crucial for improving Read More
Soumis par:
Sangdeok Chung (Corée, Rép. de)
Approuvé par:
Jaebong Lee
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5.2.3 |
WG-FSA-2022/30 Plus d'infos |
Evaluation of proposed stratum-scale catch limits for the krill fishery in Subarea 48.1 to assess whether they are likely to be precautionary S. Hill, C. Darby, T. Dornan and G. Watters
Résumé:
CCAMLR’s Scientific Committee and its working groups are developing a revised management approach for the Antarctic krill fishery in Subareas 48.1 to 48.4. A critical phase is the development of an interim approach that can be applied to Subarea 48.1 to update the measures within CM-51-07, which expires before the next (2022/23) krill fishing season. Progress has been made in Read More
Soumis par:
Simeon Hill (Royaume-Uni)
Approuvé par:
Chris Darby
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7 |
WG-FSA-2022/31 Plus d'infos |
Proposed workshop on integrating climate change and ecosystem interactions into CCAMLR science R. Cavanagh, M. Collins, C. Darby, T. Dahlgren, M. Eléaume, S. Hill, P. Hollyman, S. Kawaguchi, B. Krafft, E. Pardo, P. Trathan, A. Van de Putte, N. Walker, G. Watters and P. Ziegler
Résumé:
Evaluating the effects of climate change on Antarctic marine living resources is a priority topic for CCAMLR and was identified by the 2022 Scientific Committee Symposium as a key area of research. Acknowledging the need to better coordinate, target and integrate scientific advice on climate change, and recognising that a focused workshop would enable progress to be made, this paper recommends Read More
Soumis par:
Phil Hollyman (Royaume-Uni)
Approuvé par:
Chris Darby
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6.4 |
WG-FSA-2022/32 Plus d'infos |
About results of age determination of the Dissostichus spp. and Macrourus spp. from the research longline catches in Subarea 48.1 by Ukrainian vessel CALIPSO in 2019–2021 P. Zabroda, I. Slypko, A. Bazhan and I. Mytiai
Résumé:
During three fishing seasons 2018/19, 2019/20 and 2020/21 Ukrainian vessel CALIPSO (Fig. 1) conducted the research survey in Statistical Subarea 48.1 (Western part of the Weddell Sea). During the indicated period of Read More
Soumis par:
Pavlo Zabroda
Approuvé par:
Kostiantyn Demianenko (Ukraine)
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5.2.4 |
WG-FSA-2022/33 Plus d'infos |
Update on the VAST (vector autoregressive spatio-temporal) modelling of grenadier relative abundance in Subarea 48.6 K. Sawada, A. Grüss and T. Okuda
Résumé:
In the present paper, we report progress since WG-FSA-2021 on the development of statistical modeling to estimate the abundance trends of grenadiers caught as bycatch in the longline fisheries in CCAMLR Subarea 48.6. This work relies on spatio-temporal delta generalized linear mixed models (GLMMs) implemented with R package “VAST”. We Read More
Soumis par:
Kota Sawada (Japon)
Approuvé par:
Taro Ichii
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6.1 |
WG-FSA-2022/34 Plus d'infos |
Preliminary integrated stock assessment for the Antarctic toothfish (Dissostichus mawsoni) fishery in Divisions 58.41 and 58.4.2 P. Ziegler, C. Miller and D. Maschette
Résumé:
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 Read More
Soumis par:
Philippe Ziegler (Australia)
Approuvé par:
Philippe Ziegler (Australia)
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5.1.2 |
WG-FSA-2022/35 Plus d'infos |
Alternative proportional recruitment estimates for Subarea 48.1 based on reanalysis of the US AMLR data series Y. Ying and X. Zhao
Résumé:
Assessment of the Precautionary Harvest Rate (Gamma) for the Antarctic krill in Subarea 48.1 was still to be finalized largely due to the proportional recruitment parameters which are key inputs of the Grym. The current mostly discussed proportional recruitment parameter estimates were based on the entire US AMLR Read More
Soumis par:
Yi-Ping Ying (Chine)
Approuvé par:
Xianyong Zhao (Chine)
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7 |
WG-FSA-2022/36 Plus d'infos |
Otolith chemistry reflects local stock connectivity of Antarctic toothfish (Dissostichus mawsoni) between research blocks in Subarea 48.6: an updated report G.P. Zhu, L. Wei, T. Okuda, R. Sarralde and S. Somhlaba
Résumé:
The local stock structure of Antarctic toothfish (Dissostichus mawsoni) in some Research Blocks (RBs) of Subarea 48.6 has been investigated in Wei et al. (2018), but this study has not included the RB 48.6_5 into the analysis and the stock connectivity between RBs has also not examined. Therefore, this study is aimed to update Read More
Soumis par:
Guoping Zhu (Chine)
Approuvé par:
Xianyong Zhao (Chine)
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5.1.1 |
WG-FSA-2022/37 Plus d'infos |
Proposals to standardise the collection and processing of krill acoustic survey data S. Kasatkina and A. Abramov
Résumé:
The implementation of the Scientific Committee recommendations to develop the standardized methods for processing and reporting future acoustic survey results requires clarity on some methodological aspects of acoustic survey. Furthermore, it is important to streamline the system of krill acoustic surveys carried out in the CCAMLR area.
In view of Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)
Approuvé par:
Svetlana Kasatkina (Fédération de Russie)
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7 |
WG-FSA-2022/38 Plus d'infos |
Proposals to increase the efficiency of the tagging program in Subareas 88.1 and 88.2 O.Y. Krasnoborodko and S.M. Kasatkina
Résumé:
We analyzed data provided by Secretariat on fish tagged and subsequent recaptures in Subareas 88.1 and 88.2 during the period 2009-2017.
In our opinion, it will be possible to improve the tagging Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)
Approuvé par:
Svetlana Kasatkina (Fédération de Russie)
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4.2 |
WG-FSA-2022/39 Plus d'infos |
Where we are for the revision of CM 51-07 Y. Ying, Y. Zhao, X. Zhao, X. Wang and G. Fan
Résumé:
Based on a series of significant progress made by SC-CAMLR towards a sound science-based krill management approach since 2019, at its annual meeting in 2021 the Commission endorsed the rollover of CM 51-07 for one year to provide time to consolidate the revision of the new approach in Subarea 48.1. To facilitate discussion and Read More
Soumis par:
Xianyong Zhao (Chine)
Approuvé par:
Xianyong Zhao (Chine)
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7 |
WG-FSA-2022/40 Plus d'infos |
2022 Ross Sea shelf survey results J. Devine and M. Prasad
Résumé:
The time series of relative abundance and age structure from the Ross Sea shelf survey provides information about year class strength, variability, and autocorrelation, and hence is an important input into the Ross Sea stock assessment.
The objectives of the survey were to (i) continue monitoring trends in Antarctic toothfish ( Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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5.2.2 |
WG-FSA-2022/41 Rev. 1 Plus d'infos |
Proposal to continue the time series of research surveys to monitor abundance of Antarctic toothfish (Dissostichus mawsoni) in the southern Ross Sea, 2022/23-2024/25: Research Plan under CM 24-01 Delegation of New Zealand
Résumé:
This paper proposes a continuation of the Ross Sea shelf survey (RSSS) for three years from 2023–2025. The primary objective (1) of the survey is to monitor Antarctic toothfish recruitment in the southern Ross Sea. This would be a continuation of the annual time series of research surveys carried out since 2012 using a random stratified design. Continuing the time series is Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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5.2.2 |
WG-FSA-2022/42 Plus d'infos |
Update of skate tagging program in the Ross and Amundsen Sea regions B. Finucci and B. Moore
Résumé:
A 2-year programme was implemented in the 2019/20 and 2020/21 fishing seasons in the Ross Sea region to tag and release skates for population size estimation and to validate the thorn ageing method for Antarctic starry skate (Amblyraja georgiana). The program has been largely successful to date, with a total of 8990 skates tagged and released during the two fishing Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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6.2 |
WG-FSA-2022/43 Plus d'infos |
Update of age and growth validation of skates in the Ross Sea region using mark recapture B. Finucci, C. Maolagáin and J. Pompert
Résumé:
In the 2019/20 and 2020/21 fishing years, Antarctic starry skates (Amblyraja georgiana) were tagged with the antibiotic terramycin (oxytetracycline hydrochloride, OTC) or strontium chloride (SrCl2) for a mark-recapture programme established to estimate population size and validate caudal thorn ageing techniques. Of the 4900 tagged Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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6.2 |
WG-FSA-2022/44 Plus d'infos |
Report of the Workshop on the Ross Sea Data Collection Plan 2022 (Virtual Meeting, 11 and 12 August 2022) Workshop Co-Conveners (N. Walker and L. Ghigliotti)
Résumé:
The Workshop on the Ross Sea Data Collection Plan (WS-RSDCP) was held online from 11 to 12 August 2022. The Workshop was co-convened by Dr L. Ghigliotti (Italy) and Mr N. Walker (New Zealand) and supported by the CCAMLR Secretariat. Scientists from 11 Members attended the Workshop. Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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3.2 |
WG-FSA-2022/45 Plus d'infos |
Proposed medium-term research plan and data collection plan for the Ross Sea toothfish fishery J. Devine, M. Pinkerton, B. Moore, B. Finucci, A. Grüss, A. Dunn, J. Fenaughty, E. Pardo and N. Walker
Résumé:
The long-term goals of the Ross Sea fishery based on Article II of CCAMLR can be summarised as: the target fished population is above a level which ensures stable recruitment; the ecological relationships between harvested, dependent, and related populations are maintained; and, prevention of changes or minimisation of the risk of changes in the marine ecosystem that are not Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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3.2 |
WG-FSA-2022/46 Plus d'infos |
Review of progress against the medium-term research plan for the Ross Sea region toothfish fishery J. Devine, M. Pinkerton, B. Moore, B. Finucci, A. Grüss, A. Dunn, J. Fenaughty, E. Pardo and N. Walker
Résumé:
The aim of this paper is to review the management of the Ross Sea toothfish fishery and progress made under the 2014 medium-term research plan (MTRP). The paper focuses primarily on Antarctic toothfish, as catches of Patagonian toothfish are negligible, and covers Subarea 88.1 and Subarea 88.2 SSRUs 88.2A and B, including the linkages with the Amundsen Sea. We begin by summarising Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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3.2 |
WG-FSA-2022/47 Plus d'infos |
Monitoring by-catch species in the Ross Sea region toothfish fishery B. Moore, A. Grüss, M. Pinkerton and J. Devine
Résumé:
This paper provides a summary of trends in performance indicators, including catches, fishing effort, catch rates, fish size, sex ratios and fish body condition, for the main bycatch species/species groups in the longline fishery targeting Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region (RSR) (Subareas 88.1 and Small-Scale Research Units (SSRUs) 88.2A–B Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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6 |
WG-FSA-2022/48 Plus d'infos |
VAST (vector autoregressive spatio-temporal) modelling of macrourid relative abundance in the Ross Sea region to support by-catch management A. Grüss, B. Moore, M. Pinkerton and J. Devine
Résumé:
In this paper, we employ the VAST (vector autoregressive spatio-temporal) modelling approach to predict spatio-temporal changes in macrourid bycatch in the Ross Sea region (RSR) toothfish fishery. We re-estimated the VAST models for Macrourus whitsoni and M. caml presented to WG-SAM-2022, using catch rate data collected by scientific observers up to the 2021 Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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6.1 |
WG-FSA-2022/49 Plus d'infos |
Characterisation of the toothfish fishery in the Ross Sea region through 2021–22 A. McKenzie, J. Devine and A. Grüss
Résumé:
We summarise fishing catch and fishing effort in the Ross Sea region (Subarea 88.1 and Small-Scale Research Units (SSRUs) 88.2A-B)) together with biological characteristics of the catch of Antarctic toothfish (Dissostichus mawsoni) through the 2021–22 fishing season. The implementation of the Ross Sea region Marine Protected Area (RSrMPA) from 1st Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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3.1 |
WG-FSA-2022/50 Plus d'infos |
Summary of the toothfish fishery and tagging program in the Amundsen Sea region (small-scale research units 882C–H) to 2021/22 A. McKenzie, J. Devine and A. Grüss
Résumé:
The toothfish fishery in the Amundsen Sea region is operating under a research plan developed by the Scientific Committee in 2014 designed to provide data to support a two-area stock assessment model. The slope and shelf area within the Amundsen Sea (Small-Scale Research Units 882C-G) is showing improvements in tag recaptures within the four research blocks. Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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3.1 |
WG-FSA-2022/52 Plus d'infos |
Implementation of the CCAMLR Scheme of International Scientific Observation during 2021/22 and an update to commercial data forms and manuals. CCAMLR Secretariat
Résumé:
This paper provides a summary of deployment information for all observers on board vessels in the CCAMLR Convention Area appointed under the terms of SISO during the 2022 season, and an update on the development and implementation of commercial data forms and manuals.
Soumis par:
Isaac Forster (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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8 |
WG-FSA-2022/53 Plus d'infos |
A draft workplan to progress management strategy evaluations of the CCAMLR trend analysis rules A. Dunn, P. Ziegler, J. Devine and the CCAMLR Secretariat
Résumé:
A draft workplan to develop a Management Strategy Evaluation for the CCAMLR Trend Analysis Rules and alternative data-limited approaches for managing toothfish fisheries under research plans is presented for discussion by WG-FSA. We propose to develop models to simulate toothfish populations as a first step to testing how the management system performs relative Read More
Soumis par:
Stéphane Thanassekos (Secrétariat de la CCAMLR)
Approuvé par:
David Agnew (Secrétariat de la CCAMLR)
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4.3 |
WG-FSA-2022/55 Plus d'infos |
A tool for creating simulated survey outputs from longline data M. Kerr and T. Earl
Résumé:
This paper describes the continued development of a tool for generating simulated multiyear surveys from longline C2 data containing catch, effort and observer sampling observations, first described in WG-SAM 22/16. Following feedback from CCAMLR-SAM-22 additional features are described in this paper.
Read More
Soumis par:
Georgia Robson (Royaume-Uni)
Approuvé par:
Chris Darby
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4.2 |
WG-FSA-2022/56 Rev. 1 Plus d'infos |
Fishery characterisation for Patagonian toothfish around South Georgia (Subarea 48.3) J. Marsh, T. Earl and C. Darby
Résumé:
This paper provides a summary of catch and effort in the Patagonian toothfish (Dissostichus eleginoides) fishery around South Georgia (Subarea 48.3), together with more detailed description of the biological characteristics of the catch of Patagonian toothfish between the 1995/96 and 2020/21 fishing seasons. The analysis and data summary provides the Read More
Soumis par:
Georgia Robson (Royaume-Uni)
Approuvé par:
Chris Darby
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4.2.1 |
WG-FSA-2022/57 Rev. 1 Plus d'infos |
Assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3 T. Earl and L. Readdy
Résumé:
Assessment of the Patagonian toothfish (D. eleginoides) in Subarea 48.3 indicates that the current status of the stock is at 47% of B0. Projections indicate that a constant catch of 1,970 tonnes in the 2023 and 2024 seasons would be consistent with the CCAMLR decision rule after accounting Read More
Soumis par:
Timothy Earl (Royaume-Uni)
Approuvé par:
Chris Darby
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4.2.1 |
WG-FSA-2022/58 Plus d'infos |
Assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3: Assessment diagnostics T. Earl and L. Readdy
Résumé:
This paper presents the diagnostics associated with the CASAL 48.3 Patagonian toothfish assessment. The age raising diagnostic plots are show in Appendix 1.
Soumis par:
Timothy Earl (Royaume-Uni)
Approuvé par:
Chris Darby
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4.2.1 |
WG-FSA-2022/59 Plus d'infos |
Maturity and growth estimates of Patagonian toothfish in Subarea 48.3 between 2009 to 2021 J. Marsh, T. Earl, P. Hollyman and C. Darby
Résumé:
This paper extends the work of Marsh et al. 2022 presented at WG-SAM-22 to compare the influence of two age datasets in the estimation of maturity at age and expected length at age of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3. To provide coverage of the full length-class distribution of the catch in toothfish age data, methods for sampling Read More
Soumis par:
Georgia Robson (Royaume-Uni)
Approuvé par:
Chris Darby
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4.2 |
WG-FSA-2022/60 Plus d'infos |
Preliminary tag-recapture based population assessment of Antarctic toothfish in Subarea 48.4 T. Earl, A. Riley and J. Marsh
Résumé:
The biomass of Antarctic toothfish (Dissostichus mawsoni) in CCAMLR Subarea 48.4 is estimated from tagging returns, giving a five-year average of 1,110 tonnes since 2018. Applying the CCAMLR agreed precautionary assumption of a 5-year average biomass, and harvest rate of γ = 0.038, implies a 2023 yield of 42 tonnes.
Read More
Soumis par:
Georgia Robson (Royaume-Uni)
Approuvé par:
Chris Darby
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4.2.3 |
WG-FSA-2022/61 Plus d'infos |
Revised VME Taxa Classification Guide toothfish fishery – version 2 J. Devine, D. Tracey, S. Mills, D. Macpherson, D. Gordon and E. Mackay
Résumé:
Attached is a revised and updated CCAMLR VME Taxa Classification Guide.
We recommend that this revised VME Taxa Classification Guide replaces the existing guide as part of the information provided by CCAMLR for Technical Coordinators and Scientific Observers ( Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
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6.3 |
WG-FSA-2022/P01 Plus d'infos |
Helminth diversity in teleost fishes from the South Orkney Islands region, West Antarctica T. Kuzmina, O. Salganskij, K. Vishnyakova, J. Ivanchikova, O. Lisitsyna, E. Korol and Y. Kuzmin
Résumé:
Helminths of 12 fish species collected near the South Orkney Islands, West Antarctica, were studied from December 2020 till March 2021 during the research trip on the Ukrainian krill fishing trawler “More Sodruzhestva” (CCAMLR statistical subarea 48.2). In the whole sample of 115 fish specimens, we identified one species of Monogenea, 5 species of Trematoda, 4 species of Read More
Soumis par:
Kostiantyn Demianenko (Ukraine)
Approuvé par:
Kostiantyn Demianenko (Ukraine)
Publication:
Zoodiversity, 56 (2) (2022), doi: https://doi.org/10.15407/zoo2022.02.135
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6.4 |
WG-FSA-2022/P02 Plus d'infos |
Fatty acids linkage between mackerel icefish (Champsocephalus gunnari) and Antarctic krill (Euphausia superba) at South Georgia G.P. Zhu and J.Y. Zhu
Résumé:
Mackerel icefish, Champsocephalus gunnari, is a species of ecological and commercial importance and is the primary predator of Antarctic krill (Euphausia superba). Therefore, elucidating the trophic linkage between C. gunnari and its exclusive prey can provide a model for the trophic relationship Read More
Soumis par:
Guoping Zhu (Chine)
Approuvé par:
Xianyong Zhao (Chine)
Publication:
Fish. Res., 253 (2022): 106366
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6.4 |
WG-FSA-2022/P03 Plus d'infos |
Otolith shape as a tool for species identification of the grenadiers Macrourus caml and M. whitsoni B. Moore, S. Parker and M. Pinkerton
Résumé:
Accurate species identification of harvested fishes is a central, yet often overlooked, component of fishery monitoring. This study examined the efficacy of using otolith shape to differentiate between the morphologically similar grenadiers Macrourus caml and M. whitsoni and validate species identifications by fishery observers within and adjacent to the Ross Sea region, Antarctica. Otolith Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
Publication:
Fish. Res., 253 (2022) 106370, doi: https://doi.org/10.1016/j.fishres.2022.106370
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6.1 |
WG-FSA-2022/P04 Plus d'infos |
Comparative biology of the grenadiers Macrourus caml and M. whitsoni in the Ross Sea region, Antarctica B. Moore, S. Parker, P. Marriott, C. Sutton and M. Pinkerton
Résumé:
The grenadiers Macrourus caml and M. whitsoni form a significant bycatch component of fisheries for Antarctic toothfish (Dissostichus mawsoni) in the Southern Ocean. A lack of species-level biological and catch data has to date hindered the development of quantitative assessments for these deepwater species. This paper examines species- and sex-specific life histories of M. caml andM. whitsoni Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)
Approuvé par:
Nathan Walker (Nouvelle-Zélande)
Publication:
Front. Mar. Sci., 9: 968848, doi: 10.3389/fmars.2022.968848 (in press.)
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6.1 |
WG-FSA-2022/P05 Plus d'infos |
Whale depredation in the South Georgia Patagonian toothfish (Dissostichus eleginoides) fishery in the South Atlantic: a comparison of estimation methods T. Earl, E. MacLeod, M. Söffker, N. Gasco, F. Massiot-Granier, P. Tixier and C. Darby
Résumé:
Removal of fish from gear by marine predators, known as depredation, is a fishery dependent mortality that needs to be included in stock assessments for affected stocks to avoid misestimation of the assessed resource. Toothed whales engage regularly in depredation from longlines, and while in some regions they leave clear marks of depredation activity, in the longline fisheries in the Southern Read More
Soumis par:
Georgia Robson (Royaume-Uni)
Approuvé par:
Chris Darby
Publication:
ICES J. Mar. Sci., 78 (10) (2021): 3817–3833, doi: https://doi.org/10.1093/icesjms/fsab212
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4.2 |
WG-SAM-2022/04 Plus d'infos |
New research plan for the Dissostichus mawsoni exploratory fishery in East Antarctica (Divisions 58.4.1 and 58.4.2) from 2022/23 to 2025/26; Research plan under CM 21-02, paragraph 6(iii) Delegations of Australia, France, Japan, Republic of Korea and Spain
Résumé:
Exploratory fishing for Antarctic toothfish (Dissostichus mawsoni) in East Antarctica (Divisions 58.4.1 and 58.4.2) began in 2003. While preliminary integrated stock assessments have been developed for these Divisions, robust estimates of stock biomass and precautionary catch limits according to CCAMLR decision rules remain to be determined. Read More
Soumis par:
Philippe Ziegler (Australia)
Approuvé par:
Philippe Ziegler (Australia)
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5.1.2 |