WG-ASAM-2022/01 Подробнее |
Report of the Chair of the Scientific Committee on the CCAMLR Scientific Committee Symposium Chair of the Scientific Committee |
7 |
WG-ASAM-2022/15 Подробнее |
Review of the Rules for Access and Use of CCAMLR Data Chair of the Data Services Advisory Group (DSAG)
Резюме:
The Scientific Committee requested DSAG to review the Rules for access and use of CCAMLR Data, which was presented for consideration at the Scientific Committee symposium. This document describes the implementation of the Rules for Access and use of CCAMLR Data into the CCAMLR Data Request procedure and the procedure for Read More
Представлено (имя):
Dr Anton Van de Putte (Бельгия)
Утверждено (имя):
Dr Anton Van de Putte (Бельгия)
Запросить документ совещания
|
8 |
WG-EMM-2022/01 Подробнее |
Recruitment variability along the Antarctic Peninsula: What's the best way forward C.S. Reiss and G.M. Watters
Резюме:
This document is intended to address several issues related to the development of recruitment indices for Antarctic krill from net-tow data. We address three primary issues: 1) the view that length-frequency data collected by long-term monitoring programs that have used nets other than the RMT-8 cannot be used to parameterize Grym simulations, 2) that Read More
Представлено (имя):
Dr Christian Reiss (Соединенные Штаты Америки)
Утверждено (имя):
Dr George Watters (Соединенные Штаты Америки)
Запросить документ совещания
|
3.1 |
WG-EMM-2022/02 Подробнее |
Recruitment variability in Antarctic krill in Subarea 48.1 expressed as ‘proportional recruitment’ D. Kinzey, J.T. Hinke, C.S. Reiss and G.M. Watters
Резюме:
Proportional recruitment is a concept that summarizes the variability of new individuals entering a population over time. Two parameters characterizing proportional recruitment, the mean and standard deviation of the interannual proportion of juveniles in the population, are important inputs to the Generalised Yield Model in R (GRYM). The GRYM is a simulation framework that defines Read More
Представлено (имя):
Dr Doug Kinzey (Соединенные Штаты Америки)
Утверждено (имя):
Dr George Watters (Соединенные Штаты Америки)
Запросить документ совещания
|
3.1 |
WG-EMM-2022/32 Подробнее |
Preliminary results on the length-weight relationship of fresh Antarctic krill with weight-at-length based on multiple individuals Y. Ying, G. Fan, J. Zhu and X. Zhao
Резюме:
Aiming to develop a method to estimate the length-weight relationship for concurrent acoustic monitoring of Antarctic krill biomass, a pilot experiment was undertaken to evaluate the feasibility of measuring the weight of fresh Antarctic krill at sea by scientific observers onboard krill fishing vessel, where multiple individuals of Read More
Представлено (имя):
Dr Xianyong Zhao (Китай)
Утверждено (имя):
Dr Xianyong Zhao (Китай)
Запросить документ совещания
|
3.1 |
WG-SAM-2022/01 Rev. 1 Подробнее |
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
Резюме:
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
Представлено (имя):
Mr Nathan Walker (Новая Зеландия)
Утверждено (имя):
Mr Nathan Walker (Новая Зеландия)
Запросить документ совещания
|
5 |
WG-SAM-2022/02 Подробнее |
Continuation of the research proposal on Antarctic toothfish (Dissostichus mawsoni) in Statistical Subarea 48.6 in 2022/23 from a multiyear plan (2021/22–2023/24): Research Plan under CM21-02, paragraph 6(iii) Delegations of Japan, South Africa and Spain
Резюме:
This is the second year continuation of the on-going three-year plan from 2021/22 to 2023/24. There is no significant change from the endorsed proposal (WG-FSA-2021/38).
Представлено (имя):
Dr Takehiro Okuda (Япония)
Утверждено (имя):
Mr Masahiro Akiyama
Запросить документ совещания
|
6.1 |
WG-SAM-2022/03 Подробнее |
2022 updated analysis of the sea ice concentration in research blocks 4 and 5 of Subarea 48.6 with sea surface temperature and winds T. Namba, R. Sarralde, T. Ichii, T. Okuda, S. Somhlaba and J. Pompert
Резюме:
An analysis of the Sea Ice Concentration (SIC), Sea Surface Temperature (SST) and winds in Research Blocks (RBs) 48.6_5 and 48.6_4 is presented. The SIC in RB5 between mid Feb. and end Mar. 2022 were the lowest for the 2019-2022 period. RB4 was free of ice (SIC 0%) in Jan. and Feb. 2022.
A Read More
Представлено (имя):
Mr Roberto Sarralde Vizuete (Испания)
Утверждено (имя):
Mr Roberto Sarralde Vizuete (Испания)
Запросить документ совещания
|
6.1 |
WG-SAM-2022/04 Подробнее |
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
Резюме:
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
Представлено (имя):
Dr Philippe Ziegler (Австралия)
Утверждено (имя):
Dr Philippe Ziegler (Австралия)
Запросить документ совещания
|
5 |
WG-SAM-2022/05 Подробнее |
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 Korea and Ukraine
Резюме:
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 covering the period 2017/ Read More
Представлено (имя):
Dr Sangdeok Chung (Республика Корея)
Утверждено (имя):
Ms Jung-re Riley Kim (Республика Корея)
Запросить документ совещания
|
6.3 |
WG-SAM-2022/06 Rev. 1 Подробнее |
Proposal to conduct a local acoustic-trawl survey of Champsocephalus gunnari in Statistical Subarea 48.2 Delegation of Ukraine |
6.1 |
WG-SAM-2022/07 Подробнее |
Report on exploratory fishing in Divisions 58.4.1 and 58.4.2 between fishing seasons 2011/12 and 2021/22 G. Phillips and P. Ziegler
Резюме:
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 Read More
Представлено (имя):
Dr Philippe Ziegler (Австралия)
Утверждено (имя):
Dr Philippe Ziegler (Австралия)
Запросить документ совещания
|
5 |
WG-SAM-2022/08 Подробнее |
2022 provisional trend analysis – preliminary estimates of toothfish biomass in research blocks CCAMLR Secretariat
Резюме:
We present revisions to the reporting of the trend analysis results following reviews in 2021. Preliminary
biomass estimates for research blocks in data-limited toothfish fisheries and the resulting preliminary catch
limits for the 2023 season have been determined using the updated trend analysis decision rules. The resulting
preliminary catch limits are for illustrative Read More
Представлено (имя):
Dr Stéphane Thanassekos (Секретариат АНТКОМ)
Утверждено (имя):
Dr David Agnew (Секретариат АНТКОМ)
Запросить документ совещания
|
3.3 |
WG-SAM-2022/09 Подробнее |
Review of the Antarctic toothfish stock hypothesis in East Antarctica and the spatial design of research in Divisions 58.4.1 and 58.4.2 J. Cleeland, P. Ziegler, C. Miller, G. Phillips, P. Yates, T. Okuda, C. Péron, S. Chung and R. Sarralde
Резюме:
Exploratory fishing for Antarctic toothfish (Dissostichus mawsoni) in East Antarctica (Divisions 58.4.1 and 58.4.2) began in 2003. Since 2017/18, exploratory fishing has been conducted under successive research plans by Australia, France, Japan, Republic of Korea and Spain. Here, we review and update the hypothesis for toothfish stock structure across East Antarctica Read More
Представлено (имя):
Dr Philippe Ziegler (Австралия)
Утверждено (имя):
Dr Philippe Ziegler (Австралия)
Запросить документ совещания
|
5 |
WG-SAM-2022/10 Подробнее |
A pilot study on the length-weight relationship of fresh Antarctic krill with weight-at-length based on multiple individuals G. Fan, Y. Ying, J. Zhu and X. Zhao
Резюме:
Aiming to develop a method to estimate the length-weight relationship for concurrent acoustic monitoring of Antarctic krill biomass, a pilot experiment is undertaken to evaluate the feasibility of measuring the weight of fresh Antarctic krill at sea by scientific observers onboard krill fishing vessel, where multiple Read More
Представлено (имя):
Dr Yi-Ping Ying (Китай)
Утверждено (имя):
Dr Xianyong Zhao (Китай)
Запросить документ совещания
|
3.1 |
WG-SAM-2022/11 Подробнее |
A study of odour parameters for different bait types used in the toothfish fishing in CCAMLR area O.Y. Krasnoborodko
Резюме:
The paper studies the dynamics of odor release for different types of bait (squid, fish) . The direct spectrophotometric registration was used for the quantitative determination of proteins realized from baits in seawater. It has been shown nonlinear characteristics of odor release in water. An active release occurs twice - during the first three days and after nine-ten days after Read More
Представлено (имя):
Dr Svetlana Kasatkina (Российская Федерация)
Утверждено (имя):
Dr Svetlana Kasatkina (Российская Федерация)
Запросить документ совещания
|
3.2 |
WG-SAM-2022/12 Подробнее |
Proposal for complex acoustic and trawl surveys for the mackerel icefish (Champsocephalus gunnari) estimates in the CCAMLR Statistical Subarea 48.3. S. Kasatkina
Резюме:
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 icefish survey in Subarea Read More
Представлено (имя):
Dr Svetlana Kasatkina (Российская Федерация)
Утверждено (имя):
Dr Svetlana Kasatkina (Российская Федерация)
Запросить документ совещания
|
6.1 |
WG-SAM-2022/13 Подробнее |
A review of the Ross Sea shelf survey J. Devine
Резюме:
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 (Dissotichus mawsoni) in the southern Ross Sea was started in 2012. The survey was expanded in 2016 to monitor trends and biological Read More
Представлено (имя):
Mr Nathan Walker (Новая Зеландия)
Утверждено (имя):
Mr Nathan Walker (Новая Зеландия)
Запросить документ совещания
|
5 |
WG-SAM-2022/14 Подробнее |
Integrated toothfish stock assessments using Casal2 A. Dunn, A. Grüss, J.A. Devine; C. Miller, P. Ziegler, D. Maschette, T. Earl, C. Darby and F. Massiot-Granier
Резюме:
The software platform CASAL (C++ algorithmic stock assessment laboratory) has been used to implement integrated statistical catch-at-age toothfish stock assessments in CCAMLR since 2005. However, CASAL is no longer being developed or maintained. The software platform Casal2 has been developed as a more generalised framework for implementing Bayesian integrated catch-at-age (or Read More
Представлено (имя):
Mr Nathan Walker (Новая Зеландия)
Утверждено (имя):
Mr Nathan Walker (Новая Зеландия)
Запросить документ совещания
|
3.2 |
WG-SAM-2022/15 Подробнее |
Using VAST (vector autoregressive spatio–temporal) models to predict spatio–temporal changes in macrourid by-catch in the Ross Sea region Antarctic toothfish (Dissostichus mawsoni) fishery: Methods and preliminary results A. Grüss, B.R. Moore, M.H. Pinkerton and J.A. Devine
Резюме:
In this paper, we present methods developed to predict spatio-temporal changes in macrourid bycatch in the Ross Sea region Antarctic toothfish (Dissostichus mawsoni) fishery and some preliminary results. Our methods rely on VAST (vector autoregressive spatio-temporal) models fitted to catch rate data of Macrourus whitsoni and M. caml collected by Read More
Представлено (имя):
Mr Nathan Walker (Новая Зеландия)
Утверждено (имя):
Mr Nathan Walker (Новая Зеландия)
Запросить документ совещания
|
3.2 |
WG-SAM-2022/16 Подробнее |
A tool for creating simulated survey outputs from longline data M. Kerr and T. Earl
Резюме:
This paper presents a development tool for generating simulated multiyear surveys from longline C2 data containing catch, effort and observer sampling observations. The tool resamples historic catch and observer data according to randomly selected or prespecified survey haul locations, applying user specified conditions (e.g. gear type). It allows statistical Read More
Представлено (имя):
Ms Georgia Robson (Соединенное Королевство)
Утверждено (имя):
Dr Chris Darby
Запросить документ совещания
|
3.3 |
WG-SAM-2022/17 Подробнее |
Estimates of tag loss rates for Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3 tagged between 2004 to 2020 J. Marsh, T. Earl and C. Darby
Резюме:
Accounting for tag loss rate is an important step in reducing bias in tag-based stock size estimates in CASAL. Here, we used 10,968 records of double-tagged Patagonian toothfish (Dissostichus eleginoides) released in Subarea 48.3 between 2004 and 2020, that were recaptured with at least one tag, to estimate tag loss rates over time at liberty. We explored Read More
Представлено (имя):
Ms Georgia Robson (Соединенное Королевство)
Утверждено (имя):
Dr Chris Darby
Запросить документ совещания
|
3.2 |
WG-SAM-2022/18 Подробнее |
The utility of surface plots in the development of the CCAMLR Decision Rule, its interpretation, and the rationalisation of current management and fishery metrics C. Darby and T. Earl
Резюме:
The CCAMLR Scientific Committee has noted that there is a need to consider developments to the CCAMLR Decision Rule, including the potential utility of target and limit exploitation rate objectives to increase its robustness. WG-SAM has been tasked with this in its future workplan.
The CCAMLR Decision Rule as applied to Read More
Представлено (имя):
Ms Georgia Robson (Соединенное Королевство)
Утверждено (имя):
Dr Chris Darby
Запросить документ совещания
|
4 |
WG-SAM-2022/19 Подробнее |
Stock assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.4: assessment diagnostics L. Readdy, T. Earl and C. Darby
Резюме:
This paper presents the diagnostics associated with the Subarea 48.4 Patagonian toothfish (Dissostichus eleginoides) stock assessment models presented in Readdy et al. (2022) using the integrated CASAL assessment (Bull et al., 2012).
Представлено (имя):
Ms Georgia Robson (Соединенное Королевство)
Утверждено (имя):
Dr Chris Darby
Запросить документ совещания
|
3.2 |
WG-SAM-2022/20 Подробнее |
Stock assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3 – proposed model updates L. Readdy and T. Earl
Резюме:
This work presents updates to the stock assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3 following the recommendations of WG-FSA-2021. Additional otolith readings from the period 2012-2017 are also considered for inclusion in the assessment. Additionally, a revision to the fitting of the survey abundance index is presented. Read More
Представлено (имя):
Ms Georgia Robson (Соединенное Королевство)
Утверждено (имя):
Dr Chris Darby
Запросить документ совещания
|
3.2 |
WG-SAM-2022/21 Подробнее |
Stock assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.4 – addressing the convergence issues encountered in the 2021 assessment L. Readdy, T. Earl and C. Darby
Резюме:
Alternative models are presented for discussion to address a lack of convergence in the CASAL model fit to Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.4 owing to the increasing quantity of data. Of the models that converged successfully the outcomes showed very similar diagnostic results, particularly the MPD fits. The main differences between the Read More
Представлено (имя):
Ms Georgia Robson (Соединенное Королевство)
Утверждено (имя):
Dr Chris Darby
Запросить документ совещания
|
3.2 |
WG-SAM-2022/22 Подробнее |
Stock assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3: assessment diagnostics L. Readdy and T. Earl
Резюме:
This paper presents the diagnostics associated with a 48.3 Patagonian toothfish assessment step 5.
Представлено (имя):
Ms Georgia Robson (Соединенное Королевство)
Утверждено (имя):
Dr Chris Darby
Запросить документ совещания
|
3.2 |
WG-SAM-2022/23 Подробнее |
A comparison of fishing mortality estimates derived using data-rich and data-limited approaches C. Darby and T. Earl |
3.3 |
WG-SAM-2022/24 Подробнее |
A comparison of estimates of Patagonian toothfish (Dissostichus eleginoides) maturity and growth in Subarea 48.3 using different otolith selection procedures J. Marsh, T. Earl, P. Hollyman and C. Darby
Резюме:
This paper compares the influence of otolith selection for age reading, from observer collected samples, on the estimation of the biological productivity parameters, maturity at age and expected length at age, for Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3 between 2011 and 2020. Read More
Представлено (имя):
Ms Georgia Robson (Соединенное Королевство)
Утверждено (имя):
Dr Chris Darby
Запросить документ совещания
|
3.2 |
WG-SAM-2022/25 Подробнее |
Progress report on the joint research for Dissostichus spp. in Subarea 88.3 by the Republic of Korea and Ukraine in 2022 Delegations of the Republic of Korea and Ukraine
Резюме:
The scientific research fishing was conducted by the Greenstar (KOR) and Marigolds (UKR) in in Subarea 88.3 following the survey design (WG-FSA-2021/34). The total catch of D. mawsoni was 128909.3 kg comprising 4984 individuals. The CPUE for Dissostichus mawsoni varied among Read More
Представлено (имя):
Dr Kostiantyn Demianenko (Украина)
Утверждено (имя):
Dr Kostiantyn Demianenko (Украина)
Запросить документ совещания
|
6.3 |
WG-SAM-2022/26 Подробнее |
The status of Grym simulations developed in 2021 Y. Ying, X. Wang, X. Zhao and Q. Xu
Резюме:
The GrYM model is now ready for used in the new krill management approach. However, some of the important model input parameters were still to be determined. The present paper introduced briefly the status of the model parameter developments to contribute to the discussion at WG-SAM-2022.
Представлено (имя):
Dr Xianyong Zhao (Китай)
Утверждено (имя):
Dr Xianyong Zhao (Китай)
Запросить документ совещания
|
3.1 |
WG-SAM-2022/27 Подробнее |
Methodical aspects of measuring the selectivity of gears in krill fishery S. Sergeev and S. Kasatkina
Резюме:
The review of the available gear selectivity studies in the krill fishery in context of standard ICES methods was undertaken. Some methodical aspects of selectivity estimates were considered. According to the authors, currently, the data sets used to estimate the gear selectivity does not adequately describe the krill fishing process.
Read More
Представлено (имя):
Dr Svetlana Kasatkina (Российская Федерация)
Утверждено (имя):
Dr Svetlana Kasatkina (Российская Федерация)
Запросить документ совещания
|
3.1 |
WG-SAM-2022/28 Rev. 2 Подробнее |
An alternative method of calculating precautionary yield D. Kinzey and G.M. Watters
Резюме:
Precautionary yield ('gamma', the proportion of stock biomass harvested annually) for the Antarctic krill fishery is currently chosen by comparing krill spawning stock biomass (SSB) during 20-year model projections to pre-exploitation spawning stock biomass (SSB0). Both SSB and SSB0 are simulated for these projections using input data considered known. Precautionary yield derived Read More
Представлено (имя):
Dr Doug Kinzey (Соединенные Штаты Америки)
Утверждено (имя):
Dr George Watters (Соединенные Штаты Америки)
Запросить документ совещания
|
3.1 |
WG-SAM-2022/29 Подробнее |
Report from a training workshop on Grym krill assessments D. Maschette and S. Wotherspoon
Резюме:
Following the request by WG-SAM-2021 (SC-CAMLR 2021a, para. 10.3) and the presentation of the preliminary krill stock assessment in Maschette et al. (2021a; 2021b) to WG-FSA-2021 (SC-CAMLR 2021b, paras. 5.8 - 5.13), a training workshop on running the krill assessment models fitted using the Grym package (Maschette et al. 2019) was held on 13th and 14th Read More
Представлено (имя):
Dr Philippe Ziegler (Австралия)
Утверждено (имя):
Dr Philippe Ziegler (Австралия)
Запросить документ совещания
|
3.1 |
WG-SAM-2022/P01 Подробнее |
Casal2 User Manual for Age-Based Models Casal2 Development Team
Резюме:
Casal2 is an open-source integrated statistical catch-at-age assessment tool for modelling the population dynamics of marine populations. Casal2 is designed for quantitative assessments of marine populations, including fish, invertebrates, marine mammals and seabirds.
Casal2 implements generalised age (Casal2 for age-based models) or length structured (Casal2 for length-based models) Read More
Представлено (имя):
Mr Nathan Walker (Новая Зеландия)
Утверждено (имя):
Mr Nathan Walker (Новая Зеландия)
Публикация:
NIWA Technical Report, 139 (2022): ISSN 1174-2631. User manual for age-based models with Casal2 v22.06 (2022-06-07)
Запросить документ совещания
|
3.2 |