WG-SAM-2019 | Meetings

Working Group on Statistics, Assessments and Modelling

Location:

Concarneau, France

Meeting Start Date/Time:

Monday, 17 June 2019

Meeting End Date/Time:

Friday, 21 June 2019

Submissions Due

Monday, 3 June 2019 - 00:00 Australia/Hobart (Working Group Paper)

Please check the Information for participants for any updates (last updated 28 March 2019).

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Meeting Report:

e-sc-38-a4.pdf (276.59 KB)

Meeting Documents

Documents

Document Number	Title	Agenda Item(s)
WG-SAM-2019/01 More Info	Update report on marine mammal interactions in Division 58.4.4 N. Gasco, P. Tixier, T. Okuda, C. Péron and F. Massiot-Granier Abstract: Fishing activities targeting Patagonian toothfish (Dissostichus eleginoides) occurs in Division 58.4.4 and killer whales have been observed to interact with the vessels until 2014. Interaction rates between areas and seasons vary greatly (from 0 to 70%). Depredation rates were updated for subdivisions 58.4.4bB (16%), 58.4.4bC (1.5%) and 58.4.4bD (0%). Photo-identification effort has Read More Submitted By: Mr Nicolas Gasco (France) Approved By: Dr Marc Eléaume (France) Request Meeting Document	6.2.2
WG-SAM-2019/02 More Info	Integrated research proposal for Dissostichus spp. in Subarea 88.3 by the Republic of Korea, New Zealand and Ukraine Delegations of the Republic of Korea, New Zealand and Ukraine Abstract: A research plan for Subarea 88.3 was commenced by Korea in 2016 and New Zealand joined the proposal in 2017. The joint research proposal was for 3 years covering the period 2017/18, 2018/19 and 2019/20. It was designed to build on Korea’s previous research by continuing to focus on research blocks where tagged fish have previously been released on the slope, while also prospecting two of the Read More Submitted By: Mr Alistair Dunn Approved By: Mr Alistair Dunn Request Meeting Document	6.3.2
WG-SAM-2019/03 More Info	2019 Ross Sea shelf survey results and notification for research in 2020 S. Parker and C. Jones Abstract: The time series of relative abundance and age structure from the Ross Sea shelf survey is an important input to the Ross Sea stock assessment. The annual survey has been conducted since 2012, with a revised proposal presented in 2017 for five years (2018–2022). The objectives of the survey included monitoring the abundance and age structure of sub-adult (≤ 110 cm TL) toothfish in the south of Read More Submitted By: Mr Alistair Dunn Approved By: Mr Alistair Dunn Request Meeting Document	6.3.1
WG-SAM-2019/04 More Info	A preliminary model-based approach for estimating natural mortality of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region B. Moore, S. Mormede, S. Parker and A. Dunn Abstract: Natural mortality (M) is a key parameter in fisheries stock assessments, relating directly to the productivity of a stock, stock status, and estimated precautionary yields. In the Ross Sea region stock assessment for Antarctic toothfish (Dissostichus mawsoni), M is assumed to be 0.13 y^-1 and constant across age and sex. In 2018, the independent Read More Submitted By: Mr Alistair Dunn Approved By: Mr Alistair Dunn Request Meeting Document	3
WG-SAM-2019/05 More Info	Continuation of multi-Member research on the Dissostichus mawsoni exploratory fishery in East Antarctica (Divisions 58.4.1 and 58.4.2) from 2018/19 to 2021/22 Delegations of Australia, France, Japan, Republic of Korea and Spain Abstract: Exploratory fishing for toothfish (Dissostichus mawsoni) in East Antarctica (Divisions 58.4.1 and 58.4.2) began in 2003. Robust stock assessments and catch limits according to CCAMLR decision rules remain to be determined for these Divisions. WG-FSA-16/29 outlined the first multi-member toothfish exploratory fishery research plan up to 2017/18 for East Antarctica, which the Read More Submitted By: Dr Philippe Ziegler (Australia) Approved By: Dr Dirk Welsford (Australia) Request Meeting Document	6.2.1
WG-SAM-2019/06 More Info	Fisheries research within the Ross Sea region Marine Protected Area S. Parker and A. Dunn Abstract: The introduction of the Ross Sea region Marine Protected Area has elevated the need for research (including fisheries research) to inform the Research and Monitoring Plan and to evaluate the effectiveness of the Marine Protected Area. All research should be based on a robust experimental design, and in particular, fisheries research within the Ross Sea region should: meet a high Read More Submitted By: Mr Alistair Dunn Approved By: Mr Alistair Dunn Request Meeting Document	6
WG-SAM-2019/07 More Info	Tag linking – revised algorithm (2019) CCAMLR Secretariat Abstract: The CCAMLR Tagging Programme is a key part of CCAMLR’s management of toothfish fisheries and linking the details of recaptured fish to that of tagged fish is a key element of the programme. The CCAMLR Secretariat has developed a new tag linking approach that is designed to provide greater flexibility in linking recaptures to releases, including where a recapture is linked with equal Read More Submitted By: Dr Stephane Thanassekos (CCAMLR Secretariat) Approved By: Dr David Agnew (CCAMLR Secretariat) Request Meeting Document	4.1
WG-SAM-2019/08 More Info	Revised proposal for the ongoing research plan on Patagonian toothfish (Dissostichus eleginoides) in Division 58.4.4b (2016/17–2020/21) Delegations of Japan and France Abstract: Division 58.4.4b has been a closed area since 2002 (CM 32-02) and scientific research has been conducted with a research plan submitted under CM 24-01 since 2008 by Japan. France joined this research plan in 2015 and a joint proposal was submitted for the first time in 2016 (WG-SAM-16/06 and WG-FSA-16/33 Rev. 1) for a period of 5 years. The proposal submitted here has been substantially Read More Submitted By: Dr Takehiro Okuda Approved By: Dr Taro Ichii Request Meeting Document	6.2.2
WG-SAM-2019/09 More Info	Statistical modelling of by-catch patterns: a preliminary case study using research fisheries in Subarea 48.6 K. Sawada and T. Okuda Abstract: We report a preliminary result of statistical modeling of grenadier bycatch pattern by bottom longline research fisheries in CCAMLR Subarea 48.6, using generalized linear mixed models with zero-inflation. The result contains several issues including the failure of estimation in considerable number of candidate models, overdispersion and insufficient prediction of zero-catch, suggesting that Read More Submitted By: Dr Kota Sawada Approved By: Dr Taro Ichii Request Meeting Document	6
WG-SAM-2019/10 More Info	Chemical marking protocols for Antarctic starry skate age validation M. Francis and S. Parker Abstract: A field study is planned to validate the thorn ageing method for Antarctic starry skate (Amblyraja georgiana). This study is a fast, simple ‘add-on’ that will complement the aims of the skate tagging programme. The antibiotic terramycin (oxytetracycline hydrochloride, OTC) will be injected into skates brought into the boat for tagging during the 2019-20 skate tagging programme in the Read More Submitted By: Mr Alistair Dunn Approved By: Mr Alistair Dunn Request Meeting Document	8
WG-SAM-2019/11 More Info	Progress report on the joint research for Dissostichus spp. in Subarea 88.3 by the Republic of Korea and New Zealand in 2018/19 Delegations of the Republic of Korea and New Zealand Abstract: The scientific survey was conducted by the Greenstar (KOR) in the research block 883_1–883_P9. Due to extreme ice conditions covering the southern part of 88.3, Janas (NZL) was not able to conduct its part of the survey. The total catch of D. mawsoni was 63,840 kg comprising 2,526 individuals. The CPUE for Dissostichus mawsoni indicated Read More Submitted By: Dr Sangdeok Chung (Korea, Republic of) Approved By: Dr Seok-Gwan Choi (Korea, Republic of) Request Meeting Document	6.3.2
WG-SAM-2019/12 More Info	Patagonian toothfish tagging study plan in the southwest Atlantic (FAO Area 41) C.H. Lam, K.J. Park, J. Lee and S.-G. Choi Abstract: We propose to conduct an exploratory satellite tagging campaign of Patagonian toothfish (Dissostichus eleginoides) in the Southwest Atlantic Ocean (FAO Area 41). Existing data on this species is extremely rare and incomplete in both study duration and geographic coverage. This proposal attempts to address this inadequacy by deploying a total of 50 popup satellite archival tags on Read More Submitted By: Dr Sangdeok Chung (Korea, Republic of) Approved By: Dr Seok-Gwan Choi (Korea, Republic of) Request Meeting Document	8
WG-SAM-2019/13 Rev. 1 More Info	Proposed continuation of a multi-Member longline survey on Antarctic toothfish (Dissostichus mawsoni) in Statistical Subarea 48.6 in 2019/20 by Japan, South Africa and Spain Delegations of Japan, South Africa and Spain Abstract: A collaborative research program has been undertaken by Japan and South Africa since 2013 to enhance data collection and analysis in the subarea 48.6. From the last season (2018/19) Spain has joined the proposal in order to contribute to the data acquisition and to speed up the integrated assessments of the D.mawsoni stock in this subarea (FSA-18/34). The continuation of the Read More Submitted By: Mr Roberto Sarralde Vizuete (Spain) Approved By: Mr Roberto Sarralde Vizuete (Spain) Request Meeting Document	6.1.1
WG-SAM-2019/14 More Info	The factors causing impact on the toothfish catch estimation on board of fishing vessels K. Demianenko, P. Zabroda, I. Slypko, L. Pshenichnov, A. Bazhan, O. Diripasko and D. Marichev Abstract: The toothfish catch estimation on board of fishing vessels at the CCAMLR area is being done often in a difficult weather conditions at sea, which can cause a negative impact on the measurement equipment. Besides, until today the “green weight” of the toothfish catch on fishing vessels was not estimated directly, but by calculation, based on the weight of the production using appropriate Read More Submitted By: Dr Kostiantyn Demianenko (Ukraine) Approved By: Dr Kostiantyn Demianenko (Ukraine) Request Meeting Document	4.2
WG-SAM-2019/15 More Info	Analysis of the sea-ice concentration (SIC) in Subarea 48.6, research blocks 2, 3, 4 and 5 with sea-surface temperature (SST) and statistical models T. Namba, R. Sarralde, H. Pehlke, K. Teschke, T. Brey, S. Hain, T. Ichii, T. Okuda, S. Somhlaba and J. Pompert Abstract: An Analysis of the sea ice concentration (SIC) in research blocks 2,3,4, and 5 of subarea 48.6, with sea surface temperature(SST) and statistical models is presented. For research block 4, the SIC in 2019 was the highest for the last 4 years (2016-2019). For research block 5, the SIC in 2019 was also as high as in 2016 but around the west of block 5 the SIC in 2019 was much lower Read More Submitted By: Mr Roberto Sarralde Vizuete (Spain) Approved By: Mr Roberto Sarralde Vizuete (Spain) Request Meeting Document	6.1.1
WG-SAM-2019/16 More Info	Oceanographic study of the Subarea 48.6 with sea-surface temperature (SST) anomaly and vertical profile of sea temperature (PST) T. Namba, R. Sarralde, T. Ichii, T. Okuda, S. Somhlaba and J. Pompert Abstract: The Oceanographic study of the Subarea 48.6 on the SST, SIC, PST, current and wind vector was conducted. The lower SST corresponded to the higher SIC and vice versa. The PST indicates the mixed layer depths in research block5. The currents around the research block 4 and 5 were indicated. It is found out that there is a Read More Submitted By: Mr Roberto Sarralde Vizuete (Spain) Approved By: Mr Roberto Sarralde Vizuete (Spain) Request Meeting Document	6.1.1
WG-SAM-2019/17 More Info	Research program to examine the life- cycle and resource potential of Dissostichus spp. in the Special Research Zone within the Ross Sea region marine protected area (RSRMPA) in 2019–2027 Delegation of the Russian Federation Abstract: Russian Federation is going to continue investigation of life –cycle and resource potential for Dissostichus spp. in Ross Sea. This paper presents the research program in the frame of the Research and Monitoring Plan for RSRMOR. The research program shall be conducted in the Special Research Zone during 2019 - 2027 or the first reference period Read More Submitted By: Dr Svetlana Kasatkina (Russian Federation) Approved By: Dr Svetlana Kasatkina (Russian Federation) Request Meeting Document	6.3.1
WG-SAM-2019/18 More Info	Continuation of the research program on study of life cycle, species compositions, biology and resource potential of craboids (Anomura, Decapoda) in the Pacific Ocean Antarctic Area from 2019/20 to 2020/21 by Russian Federation Delegation of the Russian Federation Abstract: Russian program provides proposals to continue investigations of the species composition, biology, life cycle, distribution and structure of craboids stock (Anomura, Decapoda) and assess their resource potential in the Bellingshausen Sea (Subarea 88.3) and Amundsen Sea (Subarea 88.2). Russian pilot research program of craboids (Anomura, Decapoda) in the Antarctic Pacific (Subareas 88.2 and 88. Read More Submitted By: Dr Svetlana Kasatkina (Russian Federation) Approved By: Dr Svetlana Kasatkina (Russian Federation) Request Meeting Document	6.3.2
WG-SAM-2019/19 More Info	Research program on Dissostichus spp. in Divisions 58.4.1 and 58.4.2 from 2019/20 to 2021/22 Delegation of the Russian Federation Abstract: The Scientific Committee considered the assessment of Dissostichus spp. in data-poor fisheries to be of a high priority (SC-CAMLR-XXIX, paragraphs 3.125 to 3.145). The use of different gear types for the implementation of a multi-Member research on Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2) carried out in the seasons 2011/12 - 2017/18 Read More Submitted By: Dr Svetlana Kasatkina (Russian Federation) Approved By: Dr Svetlana Kasatkina (Russian Federation) Request Meeting Document	6.2.1
WG-SAM-2019/20 More Info	Modelling egg and larval transport of Antarctic Toothfish (Dissostichus mawsoni) in the East Antarctic region: Plan M. Mori, K. Mizobata, T. Okuda and T. Ichii Abstract: Antarctic Toothfish (Dissostichus mawsoni) is one of the target species that CCAMLR sets catch limits in the Southern Ocean. Due to their broad distribution relating to their life cycle and difficulties of in situ observations, life cycle with their spatial and temporal distribution is yet to be fully understood. Especially in early life stage, the process of successful egg/ Read More Submitted By: Dr Mao Mori Approved By: Dr Taro Ichii Request Meeting Document	6.2.1
WG-SAM-2019/21 More Info	Proposal on establishment of a new fishery for craboids (Anomura, Decapoda) in the Subareas 88.2 and 88.3 Delegation of the Russian Federation Abstract: The Russian Federation proposes, in accordance with Measure 21-01, on establishment a new craboid fishery using pots in Subareas 88.2 (SSRU 882 H, C, D, E, F) and 88.3 (SSRU 88.3 B, C, D) in the 2019/20 season. The initiating a new craboid fishery in Subareas 88.2 and 88.3 would be consistent with CCAMLR’s regulatory framework. Submitted By: Dr Svetlana Kasatkina (Russian Federation) Approved By: Dr Svetlana Kasatkina (Russian Federation) Request Meeting Document	8
WG-SAM-2019/22 More Info	On acceptable scattering of longlines geo-referencing in the toothfish fishery in the CAMLR Convention Area O. Krasnoborodko Abstract: The issues of longlines geo-referencing during the exploratory fisheries of the toothfish in the Convention Area are discussed. Cases of differences in the coordinates of settings and haulings are considered. The estimation of the maximum possible variation of the coordinates in the depths range of 550-3000 m was performed. It is shown that the differences of coordinates of settings and Read More Submitted By: Dr Svetlana Kasatkina (Russian Federation) Approved By: Dr Svetlana Kasatkina (Russian Federation) Request Meeting Document	8
WG-SAM-2019/23 More Info	Information about methods for finding lost longlines P. Zabroda and L. Pshenichnov Abstract: The experience of the use of methods by Ukrainian vessels to search for lost longliness in the CCAMLR Convention Area is presented. Submitted By: Dr Leonid Pshenichnov Approved By: Dr Kostiantyn Demianenko (Ukraine) Request Meeting Document	4.2
WG-SAM-2019/24 More Info	A preliminary proposal to conduct a local survey of the Champsocephalus gunnari by the midwater trawl in the Statistical Subarea 48.2 Delegation of Ukraine Abstract: Mackerel icefish (Champsocephalus gunnari) – one of the most common and widespread species of Antarctic fish. Ukraine proposes survey of Champsocephalus gunnari at previously scheduled stations (trawlings) points in the statistical Subarea 48.2. The main objective of the research is to determine the distribution and abundance of mackerel icefish in Subarea 48.2. Submitted By: Dr Leonid Pshenichnov Approved By: Dr Kostiantyn Demianenko (Ukraine) Request Meeting Document	6.1.2
WG-SAM-2019/25 More Info	Exploration of CPUE standardisation variances in the Ross Sea (Subareas 88.1 and 88.2A South of 70°s) Antarctic toothfish (Dissostichus mawsoni) exploratory longline fishery D. Maschette, S. Wotherspoon and P. Ziegler Abstract: Catch rates or catch per unit of effort (CPUE) are used for data-poor exploratory fisheries without integrated assessments in the CPUE by seabed area method to estimate stock biomass in the interim of collecting sufficient tag recaptures. Here, we address the two questions: (1) which unit of effort should be used for catch rates in mixed longline fisheries, and (2) how do different parameters Read More Submitted By: Dr Philippe Ziegler (Australia) Approved By: Dr Dirk Welsford (Australia) Request Meeting Document	6
WG-SAM-2019/26 More Info	Report on joint exploratory fishing in Divisions 58.4.1 and 58.4.2 between the 2011/12 and 2018/19 fishing seasons Delegation of Australia Abstract: Robust stock assessments and catch limits for Dissostichus mawsoni according to CCAMLR decision rules remain to be determined for Divisions 58.4.1 and 58.4.2, and precautionary management arrangements are in place as set out in Conservation Measures 41-11 and 41-05. WG-FSA-16/29 and WG-FSA-18/59 outlined the multi-member toothfish exploratory fishery research plans for these Divisions Read More Submitted By: Dr Philippe Ziegler (Australia) Approved By: Dr Dirk Welsford (Australia) Request Meeting Document	6.2.1
WG-SAM-2019/27 More Info	Planned updates for the integrated stock assessment for the Heard Island and McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Division 58.5.2 P. Ziegler and J. Dell Abstract: This paper describes some of the planned updates to the 2019 integrated stock assessment for the Heard Island and McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Division 58.5.2. These updates will include, inter alia, the estimation and inclusion of fishing mortality caused by longline gear loss, and an adjustment to the maturity function to be Read More Submitted By: Dr Philippe Ziegler (Australia) Approved By: Dr Dirk Welsford (Australia) Request Meeting Document	3
WG-SAM-2019/28 More Info	Ukraine proposes to continue a scientific survey of Dissostichus spp. by bottom longline in the eastern part of Subarea 48.1 in a season 2019/20 Delegation of Ukraine Abstract: Ukraine proposes to continue a scientific survey of Dissostichus spp. by bottom longline in the eastern part of Subarea 48.1 in a season 2019-2020. Submitted By: Dr Kostiantyn Demianenko (Ukraine) Approved By: Dr Kostiantyn Demianenko (Ukraine) Request Meeting Document	6.1.2
WG-SAM-2019/29 More Info	The preliminary report on the survey in Subarea 48.2 in 2019 Delegation of Ukraine Abstract: The fifth year survey and observations of Dissostichus spp. in statistical subarea 48.2 on board of the Ukrainian vessel SIMEIZ were conducted in accordance with the recommendations of the Scientific Committee and Commission. The design and timing of the fifth year of research generally corresponded to the 2018 season, but significant changes were noted in the Read More Submitted By: Dr Kostiantyn Demianenko (Ukraine) Approved By: Dr Kostiantyn Demianenko (Ukraine) Request Meeting Document	6.1.2
WG-SAM-2019/30 More Info	Revised CASAL model for D. eleginoides with updated biological parameters at Division 58.4.4b T. Okuda and F. Massiot-Granier Abstract: In order to achieve the milestone “1.1 Update biological parameters”(SC-CAMLR-37 Report, Annex12), biological parameters (length-weight relationship, growth curve, Age Length Key, and maturity ogice) of Dissostichus eleginoides for Division 58.4.4b were updated based on the data gathered up to the 2017/18 fishing season by France and Japan. Furthermore, the updated CASAL models were Read More Submitted By: Dr Takehiro Okuda Approved By: Dr Taro Ichii Request Meeting Document	3
WG-SAM-2019/31 More Info	Report on implementation of research program for study of species composition, biology and resource potential of craboids (Anomura, Decapoda) in the Antarctic Pacific in 2019 Delegation of the Russian Federation Abstract: Russian research of craboids (Anomura, Decapoda) in the Antarctic Pacific (Subareas 88.2 and 88.3) were carried out by the vessel “Antarctic Wolf” in March 2019 in full compliance with the Russian program (WGSAM-18/06; WGFSA-18/32 Rev.1) and recommendations of the Scientific Committee (SC-CAMLR –XXXVII, paragraph 4.3 (i-viii)). Pot catches was presented by craboid Paralomis birstaini Read More Submitted By: Dr Svetlana Kasatkina (Russian Federation) Approved By: Dr Svetlana Kasatkina (Russian Federation) Request Meeting Document	6.3.2
WG-SAM-2019/32 More Info	An exploration of the biological data used in the CCAMLR Subarea 48.3 Patagonian toothfish stock assessments E. MacLeod, K. Bradley, T. Earl, M. Söffker and C. Darby Abstract: WG-FSA 2018 noted that changes in productivity parameters may impact assessment estimates and consequent management advice, and that these changes may be related to long-term environmental change. The Working Group recommended that key assessment parameters be reviewed and that changes in the fishery dynamics that would impact their estimation be explored. The biological productivity Read More Submitted By: Dr Chris Darby Approved By: Dr Chris Darby Request Meeting Document	3
WG-SAM-2019/33 More Info	Informational report on research fishing for Dissostichus spp. in Subarea 48.1 by Ukraine in 2019 P. Zabroda, L. Pshenichnov and K. Demianenko Abstract: Scientific observation activities during Dissostichus spp. fishing for research purposes in the statistical subarea 48.1 on board of the fishing vessel “Calipso” (Fig. 1) (the shipowner LLC “Fishing Company “NEPTUNO”, Ukraine) were carried out in accordance with the research plan WG-FSA-18/20 Rev.1. Submitted By: Dr Kostiantyn Demianenko (Ukraine) Approved By: Dr Kostiantyn Demianenko (Ukraine) Request Meeting Document	6.1.2
WG-SAM-2019/34 More Info	Proposals on standardization of toothfish resource research S. Kasatkina Abstract: The methodology of modern trawl surveys carried out the ICES responsibility area is discussed in the context of discussion at the Scientific Committee and the CCAMLR Commission in 2018 regarding the longline survey methodology in Division 58.4.1. It is shown that the methodology of modern bottom trawl surveys requires a standardized design of the spatial location of trawl samples and standard Read More Submitted By: Dr Svetlana Kasatkina (Russian Federation) Approved By: Dr Svetlana Kasatkina (Russian Federation) Request Meeting Document	6
WG-SAM-2019/35 More Info	Updates to Fishery Reports – A prototype based on the ‘Exploratory fishery for Dissostichus mawsoni in Subarea 48.6’ Fishery Report CCAMLR Secretariat Abstract: This document presents a prototype of Fishery Report built using R Markdown. Documents produced in R Markdown may be exported into pdf format (this paper) as well as html pages (available on the SAM meeting server). The 2018 Working Group on Fish Stock Assessment welcomed the Secretariat’s intent to transform the way Fishery Reports will be published, into standardised and automated webpages ( Read More Submitted By: Dr Stephane Thanassekos (CCAMLR Secretariat) Approved By: Dr David Agnew (CCAMLR Secretariat) Request Meeting Document	4.2
WG-SAM-2019/36 More Info	Updated biological parameters of Dissostichus mawsoni at Subarea 48.6 T. Okuda and R. Sarralde Vizuete Abstract: To achieve the milestone “Updating biological parameters for the population, suitable for inclusion in CASAL: Age Length Key (ALK), growth curves, maturity ogives” (SC-CAMLR-37 Report, para 3.130), this paper represents the updated length-weight relationship, growth curve, ALK, and maturity ogives as biological parameters of Dissostichus mawsoni at Subarea 48.6 up to the 2017/18 Read More Submitted By: Dr Takehiro Okuda Approved By: Ms Doro Forck (CCAMLR Secretariat) Request Meeting Document	6.1.1
WG-SAM-2019/37 More Info	A development of catch per unit effort (CPUE) trends that may be useful in stock assessment for Dissostichus mawsoni in Subarea 48.6 S. Somhlaba, K. Leach, M. Bergh, T. Okuda, T, IIchi, R. Sarralde and T. Namba Abstract: Catch per unit effort (CPUE) is developed for subarea 48.6 from data covering 2004/2005 to 2017/2018 fishing seasons. General Linear Models and General Linear Mixed Models were applied to these data to extract annual time series trends that may be of use in the fitting of stock assessment models for Dissostichus mawsoni (D. mawsoni) in the area. The entire fishing area Read More Submitted By: Mr Sobahle Somhlaba Approved By: Mr Johan de Goede Request Meeting Document	6

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Agenda

Provisional Agenda

Expand All Annotations | Expand All Documents | Collapse All

1 Introduction

Annotations

The Scientific Committee established the Working Group on Statistics, Assessments and Modelling (WG-SAM) during CCAMLR-XXV (SC-CAMLR-XXV, paragraph 13.12), with a directed emphasis on developing, refining and evaluating quantitative approaches for all Antarctic marine living resources managed by CCAMLR. WG-SAM serves as a flexible technical group to address quantitative issues relevant to WG-FSA, WG-EMM and ad hoc WG-IMAF (SC-CAMLR-XXV, paragraphs 13.4 to 13.8). WG-SAM is to provide advice necessary for the work of these working groups and the Scientific Committee.

Although focus topics are prioritised by the Scientific Committee, submitted meeting papers, along with presentations and analyses conducted during the meeting, will form the basis for discussion and advice.

The terms of reference for WG-SAM are to provide advice to the Scientific Committee and its working groups on:

(i) Quantitative assessment methods, statistical procedures and modelling approaches for the conservation of Antarctic marine living resources

(ii) The implementation and data requirements of such methods, procedures and approaches.

In 2017, the Scientific Committee developed a five-year work plan (SC-CAMLR-XXXVI/BG/40) and identified topics for WG-SAM in 2019 as: Development of ecosystem models for toothfish, Acoustic survey methods and design to facilitate feedback management of the krill fishery (joint with SG-ASAM and WG-EMM), Subarea 48.2 research synthesis and evaluation. These were in addition to several topics not addressed by WG-SAM-2018.

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2 Opening of the meeting

Annotations

Welcome to participants and overview of facilities, Secretariat’s offices, computer support, Internet access and extracurricular activities.

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2.1 Adoption of the agenda and organisation of the meeting

Annotations

Amendments to and adoption of the meeting agenda, assignment of meeting papers to agenda items, appointment of rapporteurs and procedures for the preparation of the report and establishment of ad hoc subgroups if necessary.

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3 Assessments to estimate sustainable yield

Annotations

The Working Group will review new and modified stock assessment models under development to provide management advice.

a. preliminary assessments (e.g. structually changed icefish or toothfish assessments or developing assessments from research plans in Subareas 48.6 or 58.4)

b. assessment-related analyses (e.g. algorithms to standardise tagging data inputs to stock assessments or gear standardisation issues)

c. response to the Independent Stock Assessment Review (four assessments involved).

Documents

WG-SAM-2019/04	A preliminary model-based approach for estimating natural mortality of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region B. Moore, S. Mormede, S. Parker and A. Dunn
WG-SAM-2019/27	Planned updates for the integrated stock assessment for the Heard Island and McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Division 58.5.2 P. Ziegler and J. Dell
WG-SAM-2019/30	Revised CASAL model for D. eleginoides with updated biological parameters at Division 58.4.4b T. Okuda and F. Massiot-Granier
WG-SAM-2019/32	An exploration of the biological data used in the CCAMLR Subarea 48.3 Patagonian toothfish stock assessments E. MacLeod, K. Bradley, T. Earl, M. Söffker and C. Darby

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4 Cross-cutting issues in longline fisheries affecting data quality

Annotations

In data-poor fisheries, the trend analysis method for setting catch limits based on analysis of time series of biomass estimates was further developed in 2018, however, the Working Group noted a number of issues that required further development (SC-CAMLR-XXXVII, Annex 6, paragraphs 4.3 and 4.7; SC-CAMLR-XXXVII, paragraph 3.95). Unaddressed issues in data-poor fisheries such as the development of stock assessments and the use of CCAMLR decision rules in areas with significant illegal, unreported and unregulated (IUU) harvest (SC-CAMLR-XXXIV, paragraph 3.83), or the use of methods to determine effective tag releases or recaptures in the analysis of tagging data (SC-CAMLR-XXXVII, paragraphs 3.184 and 3.188) will be considered under this agenda item if papers are submitted.

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4.1 Tagging

Documents

WG-SAM-2019/07

Tag linking – revised algorithm (2019)
CCAMLR Secretariat

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4.2 Generic

Documents

WG-SAM-2019/14	The factors causing impact on the toothfish catch estimation on board of fishing vessels K. Demianenko, P. Zabroda, I. Slypko, L. Pshenichnov, A. Bazhan, O. Diripasko and D. Marichev
WG-SAM-2019/23	Information about methods for finding lost longlines P. Zabroda and L. Pshenichnov
WG-SAM-2019/35	Updates to Fishery Reports – A prototype based on the ‘Exploratory fishery for Dissostichus mawsoni in Subarea 48.6’ Fishery Report CCAMLR Secretariat

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5 Data Services Advisory Group (DSAG)

Annotations

In 2018, the Scientific Committee recommended that the Data Management Group (DMG) be renamed to ‘Data Services Advisory Group’ (DSAG) to more closely reflect the scope of its tasks as per updated terms of references (SC-CAMLR-XXXVII, Annex 10).

The Working Group will consider progress reported by the DSAG, as well as identify a WG-SAM contact person for DSAG issues (SC-CAMLR-XXXVII, paragraph 3.42). In addition, the Working Group will provide feedback developing data services needs.

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6 Review of research plan proposals and results

Annotations

A requirement to submit research plans in notifications for exploratory fisheries for Dissostichus spp. in Area 48 and Subare 58.4 was developed in 2011 (Conservation Measure (CM) 21-02; SC-CAMLR-XXX, paragraphs 2.4 to 2.6; CCAMLR-XXX, paragraph 12.33). There are currently two standing agenda items for WG-SAM to review these plans and plans for research conducted under CM 24-01 (SC-CAMLR-XXXI, paragraphs 2.5 and 2.6; SC-CAMLR-XXX, paragraphs 15.3):

(i) review of research plans from Members notifying to fish in exploratory fisheries in Area 48 and Subarea 58.4

(ii) review of research proposals for closed areas, areas with zero catch limits and other areas not included in (i).

The Working Group will prioritise reviewing the experimental design of new proposals, followed by new proposals, and ongoing research plans or proposals.

Documents

WG-SAM-2019/06	Fisheries research within the Ross Sea region Marine Protected Area S. Parker and A. Dunn
WG-SAM-2019/09	Statistical modelling of by-catch patterns: a preliminary case study using research fisheries in Subarea 48.6 K. Sawada and T. Okuda
WG-SAM-2019/25	Exploration of CPUE standardisation variances in the Ross Sea (Subareas 88.1 and 88.2A South of 70°s) Antarctic toothfish (Dissostichus mawsoni) exploratory longline fishery D. Maschette, S. Wotherspoon and P. Ziegler
WG-SAM-2019/34	Proposals on standardization of toothfish resource research S. Kasatkina
WG-SAM-2019/37	A development of catch per unit effort (CPUE) trends that may be useful in stock assessment for Dissostichus mawsoni in Subarea 48.6 S. Somhlaba, K. Leach, M. Bergh, T. Okuda, T, IIchi, R. Sarralde and T. Namba

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6.1 Proposals and research results from Area 48

Documents

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6.1.1 Subarea 48.6

Documents

WG-SAM-2019/13 Rev. 1	Proposed continuation of a multi-Member longline survey on Antarctic toothfish (Dissostichus mawsoni) in Statistical Subarea 48.6 in 2019/20 by Japan, South Africa and Spain Delegations of Japan, South Africa and Spain
WG-SAM-2019/15	Analysis of the sea-ice concentration (SIC) in Subarea 48.6, research blocks 2, 3, 4 and 5 with sea-surface temperature (SST) and statistical models T. Namba, R. Sarralde, H. Pehlke, K. Teschke, T. Brey, S. Hain, T. Ichii, T. Okuda, S. Somhlaba and J. Pompert
WG-SAM-2019/16	Oceanographic study of the Subarea 48.6 with sea-surface temperature (SST) anomaly and vertical profile of sea temperature (PST) T. Namba, R. Sarralde, T. Ichii, T. Okuda, S. Somhlaba and J. Pompert
WG-SAM-2019/36	Updated biological parameters of Dissostichus mawsoni at Subarea 48.6 T. Okuda and R. Sarralde Vizuete

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6.1.2 Subareas 48.1 and 48.2

Documents

WG-SAM-2019/24	A preliminary proposal to conduct a local survey of the Champsocephalus gunnari by the midwater trawl in the Statistical Subarea 48.2 Delegation of Ukraine
WG-SAM-2019/28	Ukraine proposes to continue a scientific survey of Dissostichus spp. by bottom longline in the eastern part of Subarea 48.1 in a season 2019/20 Delegation of Ukraine
WG-SAM-2019/29	The preliminary report on the survey in Subarea 48.2 in 2019 Delegation of Ukraine
WG-SAM-2019/33	Informational report on research fishing for Dissostichus spp. in Subarea 48.1 by Ukraine in 2019 P. Zabroda, L. Pshenichnov and K. Demianenko

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6.2 Proposals and research results from Subarea 58.4

Documents

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6.2.1 Divisions 58.4.1 and 58.4.2

Documents

WG-SAM-2019/05	Continuation of multi-Member research on the Dissostichus mawsoni exploratory fishery in East Antarctica (Divisions 58.4.1 and 58.4.2) from 2018/19 to 2021/22 Delegations of Australia, France, Japan, Republic of Korea and Spain
WG-SAM-2019/19	Research program on Dissostichus spp. in Divisions 58.4.1 and 58.4.2 from 2019/20 to 2021/22 Delegation of the Russian Federation
WG-SAM-2019/20	Modelling egg and larval transport of Antarctic Toothfish (Dissostichus mawsoni) in the East Antarctic region: Plan M. Mori, K. Mizobata, T. Okuda and T. Ichii
WG-SAM-2019/26	Report on joint exploratory fishing in Divisions 58.4.1 and 58.4.2 between the 2011/12 and 2018/19 fishing seasons Delegation of Australia

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6.2.2 Division 58.4.4

Documents

WG-SAM-2019/01	Update report on marine mammal interactions in Division 58.4.4 N. Gasco, P. Tixier, T. Okuda, C. Péron and F. Massiot-Granier
WG-SAM-2019/08	Revised proposal for the ongoing research plan on Patagonian toothfish (Dissostichus eleginoides) in Division 58.4.4b (2016/17–2020/21) Delegations of Japan and France

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6.3 Review of research proposals and results for Area 88

Documents

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6.3.1 Subarea 88.1

Documents

WG-SAM-2019/03	2019 Ross Sea shelf survey results and notification for research in 2020 S. Parker and C. Jones
WG-SAM-2019/17	Research program to examine the life- cycle and resource potential of Dissostichus spp. in the Special Research Zone within the Ross Sea region marine protected area (RSRMPA) in 2019–2027 Delegation of the Russian Federation

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6.3.2 Subeareas 88.2 and 88.3

Documents

WG-SAM-2019/02	Integrated research proposal for Dissostichus spp. in Subarea 88.3 by the Republic of Korea, New Zealand and Ukraine Delegations of the Republic of Korea, New Zealand and Ukraine
WG-SAM-2019/11	Progress report on the joint research for Dissostichus spp. in Subarea 88.3 by the Republic of Korea and New Zealand in 2018/19 Delegations of the Republic of Korea and New Zealand
WG-SAM-2019/18	Continuation of the research program on study of life cycle, species compositions, biology and resource potential of craboids (Anomura, Decapoda) in the Pacific Ocean Antarctic Area from 2019/20 to 2020/21 by Russian Federation Delegation of the Russian Federation
WG-SAM-2019/31	Report on implementation of research program for study of species composition, biology and resource potential of craboids (Anomura, Decapoda) in the Antarctic Pacific in 2019 Delegation of the Russian Federation

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7 Future work

Annotations

The Working Group will identify a prioritised list of topics to provide to the Scientific Committee for consideration in updating the work plan. Specifically, we will use this opportunity to develop a streamlined process for research proposal submission for consideration by the Scientific Committee. We will also review and propose an updated five-year workplan for WG-SAM for consideration by the Scientific Committee. We encourage paper submissions on these topics.

Documents

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8 Other business

Annotations

Participants are invited to identify issues for consideration under other business. Papers submitted under this agenda item need to link the content to a specific task of WG-SAM, and identify the actions sought from the Working Group.

Documents

WG-SAM-2019/10	Chemical marking protocols for Antarctic starry skate age validation M. Francis and S. Parker
WG-SAM-2019/12	Patagonian toothfish tagging study plan in the southwest Atlantic (FAO Area 41) C.H. Lam, K.J. Park, J. Lee and S.-G. Choi
WG-SAM-2019/21	Proposal on establishment of a new fishery for craboids (Anomura, Decapoda) in the Subareas 88.2 and 88.3 Delegation of the Russian Federation
WG-SAM-2019/22	On acceptable scattering of longlines geo-referencing in the toothfish fishery in the CAMLR Convention Area O. Krasnoborodko

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9 Advice to the Scientific Committee

Annotations

WG-SAM provides advice to each of the working groups and to the Scientific Committee on statistics, assessments and modelling. Specific advice that has been requested will be summarised in this agenda item following general discussion in other agenda items. Advice will also be given to the Scientific Committee on the priorities discussed during the meeting for the development and refinement of quantitative methods.

Documents

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10 Adoption of report and close of meeting

Annotations

As is usual practice in meetings of the Scientific Committee and its working groups, rapporteurs will draft sections of the report according to general guidelines for its production. The Secretariat is responsible for formatting, editing and circulation of the report. Any proposed changes to the report prior to report adoption need to be arranged through the rapporteurs or the Co-conveners using the web-based document management system. Adoption of the report will be conducted interactively.

Discussion will conclude by midday Thursday, allowing Thursday afternoon and evening for report preparation and reading. Report adoption will be on Friday morning.

Documents

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