WG-SAM-2019

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
Presentado por:
Mr Nicolas Gasco (Francia)

Aprobado por:
Dr Marc Eléaume (Francia)

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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
Presentado por:
Mr Alistair Dunn (Nueva Zelandia)

Aprobado por:
Mr Alistair Dunn (Nueva Zelandia)

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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
Presentado por:
Mr Alistair Dunn (Nueva Zelandia)

Aprobado por:
Mr Alistair Dunn (Nueva Zelandia)

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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
Presentado por:
Mr Alistair Dunn (Nueva Zelandia)

Aprobado por:
Mr Alistair Dunn (Nueva Zelandia)

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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
Presentado por:
Dr Philippe Ziegler (Australia)

Aprobado por:
Dr Dirk Welsford (Australia)

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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:

1. meet a high Read More
   Presentado por:
   Mr Alistair Dunn (Nueva Zelandia)
   
   Aprobado por:
   Mr Alistair Dunn (Nueva Zelandia)
   
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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
Presentado por:
Dr Stéphane Thanassekos (Secretaría de la CCRVMA)

Aprobado por:
Dr David Agnew (Secretaría de la CCRVMA)

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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
Presentado por:
Dr Takehiro Okuda (Japón)

Aprobado por:
Dr Taro Ichii

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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
Presentado por:
Dr Kota Sawada (Japón)

Aprobado por:
Dr Taro Ichii

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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
Presentado por:
Mr Alistair Dunn (Nueva Zelandia)

Aprobado por:
Mr Alistair Dunn (Nueva Zelandia)

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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
Presentado por:
Dr Sangdeok Chung (República de Corea)

Aprobado por:
Dr Seok-Gwan Choi (República de Corea)

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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
Presentado por:
Dr Sangdeok Chung (República de Corea)

Aprobado por:
Dr Seok-Gwan Choi (República de Corea)

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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
Presentado por:
Mr Roberto Sarralde Vizuete (España)

Aprobado por:
Mr Roberto Sarralde Vizuete (España)

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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
Presentado por:
Dr Kostiantyn Demianenko (Ucrania)

Aprobado por:
Dr Kostiantyn Demianenko (Ucrania)

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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 than Read More
Presentado por:
Mr Roberto Sarralde Vizuete (España)

Aprobado por:
Mr Roberto Sarralde Vizuete (España)

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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 relationship between the SST and the wind. The CTD vertical Read More
Presentado por:
Mr Roberto Sarralde Vizuete (España)

Aprobado por:
Mr Roberto Sarralde Vizuete (España)

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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 for existence of the Read More
Presentado por:
Dr Svetlana Kasatkina (Federación de Rusia)

Aprobado por:
Dr Svetlana Kasatkina (Federación de Rusia)

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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
Presentado por:
Dr Svetlana Kasatkina (Federación de Rusia)

Aprobado por:
Dr Svetlana Kasatkina (Federación de Rusia)

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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  is a critical Read More
Presentado por:
Dr Svetlana Kasatkina (Federación de Rusia)

Aprobado por:
Dr Svetlana Kasatkina (Federación de Rusia)

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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
Presentado por:
Dr Mao Mori

Aprobado por:
Dr Taro Ichii

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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.

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
Presentado por:
Dr Svetlana Kasatkina (Federación de Rusia)

Aprobado por:
Dr Svetlana Kasatkina (Federación de Rusia)

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The experience of the use of methods by Ukrainian vessels to search for lost longliness in the CCAMLR Convention Area is presented.

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.

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
Presentado por:
Dr Philippe Ziegler (Australia)

Aprobado por:
Dr Dirk Welsford (Australia)

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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
Presentado por:
Dr Philippe Ziegler (Australia)

Aprobado por:
Dr Dirk Welsford (Australia)

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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
Presentado por:
Dr Philippe Ziegler (Australia)

Aprobado por:
Dr Dirk Welsford (Australia)

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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.

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 CPUE Read More
Presentado por:
Dr Kostiantyn Demianenko (Ucrania)

Aprobado por:
Dr Kostiantyn Demianenko (Ucrania)

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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
Presentado por:
Dr Takehiro Okuda (Japón)

Aprobado por:
Dr Taro Ichii

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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
Presentado por:
Dr Svetlana Kasatkina (Federación de Rusia)

Aprobado por:
Dr Svetlana Kasatkina (Federación de Rusia)

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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
Presentado por:
Dr Chris Darby

Aprobado por:
Dr Chris Darby

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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.

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
Presentado por:
Dr Svetlana Kasatkina (Federación de Rusia)

Aprobado por:
Dr Svetlana Kasatkina (Federación de Rusia)

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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
Presentado por:
Dr Stéphane Thanassekos (Secretaría de la CCRVMA)

Aprobado por:
Dr David Agnew (Secretaría de la CCRVMA)

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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
Presentado por:
Dr Takehiro Okuda (Japón)

Aprobado por:
Ms Doro Forck (Secretaría de la CCRVMA)

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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 in 48 Read More
Presentado por:
Mr Sobahle Somhlaba (Sudáfrica)

Aprobado por:
Mr Johannes de Goede (Sudáfrica)

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