WG-SAM-16

Exploratory fishing for toothfish (Dissostichus spp.) in Division 58.4.1 began in 2003. Robust stock assessment and catch limits according to CCAMLR decision rules remain to be determined for this Division. France notifies its wish to collaborate in this research fishery with the other participants over the coming years in order to participate in the tagging program and achieve a Read More
Soumis par:
Benoit Tourtois

Approuvé par:
Philippe Koubbi (France)

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Exploratory fishing for toothfish (Dissostichus spp.) in Division 58.4.2 began in 2003. In 2015 the fishery was limited to one Korean and one Spanish flagged vessel using longlines and the precautionary catch limit for the exploratory fishery for Dissostichus spp. was 35 tonnes in SSRU E. Only the Korean-flagged vessel undertook research fishing activity with a total reported Read More
Soumis par:
Benoit Tourtois

Approuvé par:
Philippe Koubbi (France)

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In Division 58.4.3a, since 2012, research fishing has been conducted in the research block by two vessels using longlines: Shinsei Maru No. 3 (Japan) and the Saint André (France). The catch limit for Dissostichus spp. is 32 tonnes and the total reported catch up in 2014/2015 was 15 tonnes. A technical problem for the French vessel had shortened the fishing campaign. Read More
Soumis par:
Benoit Tourtois

Approuvé par:
Philippe Koubbi (France)

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The current season (2015/16) is the first one of the second three-season research in data-poor fisheries. In the present report, the next season research plan in Division 58.4.1 was made using the updated CCAMLR C2 and Observer data.

The stock sizes for five research blocks (58.4.1_1, 58.4.1_2, 58.4.1_3, 58.4.1_4 and 58.4.1_5) were estimated by the Petersen estimator and the CPUE x Read More
Soumis par:
Kenji Taki (Japon)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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The current season (2015/16) is the first one of the second three-season research in data-poor fisheries. In the present report, the next season research plan in Division 58.4.2 was made using the updated CCAMLR C2 and Observer data.

The stock sizes for a research block (58.4.2_1) were estimated by the Petersen estimator and the CPUE x seabed analogy method using updated CCAMLR C2 data Read More
Soumis par:
Kenji Taki (Japon)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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Japan and France made the next season’s (2016/17) research plan in research blocks 58.4.4b_1 and 58.4.4b_2 using the updated CCAMLR C2 and Observer data.

The estimated median stock size in block 58.4.4b_1 and 58.4.4b_2 was 380, and 483 tonnes, respectively, in Chapman estimator using R-package tagr. The estimated median stock size in block 58.4.4b_1 and 58.4.4b_2 was 1 057, and 1 153 Read More
Soumis par:
Kenji Taki (Japon)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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South Africa and Japan made the next season’s (2016/17) research plan in Subarea 48.6 using the updated CCAMLR C2 and Observer data.

We have firstly checked data quality and found some abnormal data for the two vessels in block 48.6_2, therefore we removed the data for the current analysis.

We investigated the biological features of D. mawsoni using Observer data. The Read More
Soumis par:
Kenji Taki (Japon)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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Here we propose the northeastward of research block of 48.6_2 along ridges to promote sufficient utilization of the catch limit, which enable us to complete planned research, evaluate the habitat model and elucidate stock structure. The distribution of densities (catch per haul in 20-minute grid) of Dissostichus mawsoni is shown in Figure 1. The research operation for the block 48.6_2 Read More
Soumis par:
Kenji Taki (Japon)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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Exploratory fishing for toothfish (Dissostichus spp.) in East Antarctica (Divisions 58.4.1 and 58.4.2) began in 2003. Robust stock assessment and catch limits according to CCAMLR decision rules remain to be determined for these Divisions. The 2015/16 season was the first of a three-year research plan which was developed by Australia (WG-FSA-15/47 Rev. 1) under Conservation Measure 41– Read More
Soumis par:
Peter Yates (Australia)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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In the 2012/13 fishing season Spain began the implementation of a multi-annual Research Plan for Divisions 58.4.1 and 58.4.2 in order to estimate local biomass of Dissostichus spp. by means of two methods: depletion and tagging. Although a big effort has been placed for their accomplishment, results have to be analyzed in the coming months but some doubt about the reliability of data Read More
Soumis par:
Roberto Sarralde Vizuete (Espagne)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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The subarea 88.3 is a large area contained from 105° W to 70° W where has been closed to directed fishing following the results of a Chilean survey activities in 1998 (SC-CCAMLR-XVII/BG/7). Previous three research surveys conducted by the New Zealand and the Russian flagged vessels since 1998. It was noted that 8 D. Mawsoni were tagged by the New Zealand in the 2004/05 season and 123 Read More
Soumis par:
Seok-Gwan Choi (Corée, Rép. de)

Approuvé par:
Jung-re Riley Kim (Corée, Rép. de)

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Presentar antecedentes y el objetivo de contribuir con un barco mas en la pesca de investigación en la Subárea 48.6 que aumentaria las chances de cuota de pesca de investigación y asi el número de peces observados y marcados, a efectos de lograr un nivel que permita robustecer el tamaño del stock estimado. Este documento presenta un Plan de investigación para el período 2016/17 - 2018/19, en Read More
Soumis par:
Alberto Tabaré Lozano Junca (Uruguay)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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Understanding the spatial distribution of the release of tagged fish and the subsequent spatial coverage of fishing effort to recapture tagged fish is an important consideration when interpreting the biomass estimated from mark recapture data. In 2015, the Scientific Committee identified that measures of spatial overlap and potential bias in the development of tag-based biomass estimates are Read More
Soumis par:
Rohan Currey (Nouvelle-Zélande)

Approuvé par:
Rohan Currey (Nouvelle-Zélande)

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At its 2011 meeting, the Scientific Committee agreed that a time series of relative abundance from a well-designed survey could be a useful input into the Ross Sea stock assessment model. The first four surveys were completed in February 2012, 2013, 2014, and 2015. In this paper we provide results of the fifth survey in the time series. The objectives of this survey were: (1) to continue a Read More
Soumis par:
Rohan Currey (Nouvelle-Zélande)

Approuvé par:
Rohan Currey (Nouvelle-Zélande)

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We propose the continuation of a multi-member research project using standardised longline gear to sample the toothfish populations in the northern areas (61°‑ 66° S) of SSRUs 88.2A–B. The purpose of the research as requested by the Scientific Committee (SC-CAMLR XXXII, paragraph 3.76) is to characterise the local toothfish populations found there to better understand stock structure, movement Read More
Soumis par:
Rohan Currey (Nouvelle-Zélande)

Approuvé par:
Rohan Currey (Nouvelle-Zélande)

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At the 2015 meetings of WG-FSA and the Scientific Committee, the UK, New Zealand and Norway noted that they would perform an analysis of CPUE variability, haul duration and haul speed from the 2015 survey of the northern region of SSRUs 88.2A–B, including a comparison with all exploratory fisheries and closed areas. The analysis showed that overall, the CPUE rates observed in the survey were Read More
Soumis par:
Rohan Currey (Nouvelle-Zélande)

Approuvé par:
Rohan Currey (Nouvelle-Zélande)

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Most things related to Dissostichus spp. in the eastern side of Antarctic Ocean has not been known well as namely the area is data poor areas. In the Division 58.4.1 there are two stocks; one extends from the SSRU 58.4.1C to the SSRU 58.4.2A, and the other one to the SSRU 58.4.1H. The population sizes were vulnerable with a big range of about 1,000-2,000 t per SSRU in 58.4.1. During Read More
Soumis par:
Seok-Gwan Choi (Corée, Rép. de)

Approuvé par:
Seok-Gwan Choi (Corée, Rép. de)

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In recent years there have been a number of changes in the criteria, metrics and application of methods used in setting research catch limits in research blocks as well as assessing progress in research plans. This has resulted in some confusion in the application of methods and the intended purpose of the metrics included in the summary table presented to the Scientific Committee that Read More
Soumis par:
Lucy Robinson (Secrétariat de la CCAMLR)

Approuvé par:
Andrew Wright (Secrétariat de la CCAMLR)

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The second year survey and observations of Dissostichus spp. in statistical subarea 48.2 on board the Ukrainian vessel SIMEIZ were conducted in accordance with the recommendations of the Scientific Committee and Commission. The second year survey design was amended in comparison with the one of the first year and approved by WGs SAM, FSA and SC CCAMLR.  Obtained data Read More
Soumis par:
Leonid Pshenichnov (Ukraine)

Approuvé par:
Kostiantyn Demianenko (Ukraine)

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The third year research plan of Ukraine in subarea 48.2 by the fishing vessel SIMEIZ is provided. The survey design remains the same as in the second (2016) year. Ukraine proposes to divide the stock (the catch limit) in the researched area on two blocks – Northern and Southern, in order to reach maximum coverage of the subarea by the research stations.

Some methods used by observers to record by-catch data in the longline toothfish fishery are discussed. Proposals on implementation of a uniform process reporting accurate by-catch data in the CCAMLR Convention Area are shown.

Closed mostly within the Weddell Sea Subarea 48.5 is one of the closed data-poor CCAMLR subareas, where stock assessment should be carried out. In spite of hard ice conditions at most part of the Sea during mostly all the year, this large water area is very similar to the Ross Sea. This similarity could be found in geographical location, bathymetric profile, currents system and follows from Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)

Approuvé par:
Dmitry Kremenyuk (Fédération de Russie)

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Analysis of the data from tooth fish fishery in the northern part of the Ross Sea (SSRU 88.1 B, C and G) revealed that the current approach to analyze longline fishery data in the presence of questionable CPUE values does not allow obtaining adequate information for decision-making.  Necessity to develop procedures for analyzing logline fishery data with aims to provide information for Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)

Approuvé par:
Dmitry Kremenyuk (Fédération de Russie)

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Russian Federation is going to continue investigation for toothfish in Ross Sea in fishing seasons 2016-2019. The present program aims to recapture tagged fishes released during the implementation of the previous research program took place in 2010-2012 fishing seasons and investigate resource potential and life cycle of Dissostichus species within the eastern part of the Ross Sea Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)

Approuvé par:
Dmitry Kremenyuk (Fédération de Russie)

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The research fishing was conducted in Division 58.4.1 from 9 January 2016 to 21 March 2016 in 2015/16 fishing season. One additional national observer was on board to perform various scientific researches. The total catch of D. mawsoni was 227,220 kg with 6,642 individuals. The CPUE of D. mawsoni recorded 0.31 kg/hook. 1,138 individuals of D. mawsoni and 5 individuals of Read More
Soumis par:
Seok-Gwan Choi (Corée, Rép. de)

Approuvé par:
Seok-Gwan Choi (Corée, Rép. de)

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Korean research fishing was conducted in Subarea 88.3 from 8 February 2016 to 5 March 2016 in 2015/16 fishing season. The total number of days fished are 41 of 76 days stayed in the fishing grounds. The total catch of D. mawsoni was 106,241 kg with 5,227 individuals, and their CPUE recorded 0.19 kg/hook. 566 individuals of D. mawsoni were tagged and released. Tagging rate and Read More
Soumis par:
Seok-Gwan Choi (Corée, Rép. de)

Approuvé par:
Seok-Gwan Choi (Corée, Rép. de)

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We submitted the results on analysis of conversion factors of Antartic toothfish, Dissostichus mawsoni in accordance with decision of Scientific Committee (SC-CAMLR-XXXIV, paragraphs 3.93 and 3.94). This report analyzed the conversion factor of toothfishes caught by Korean bottom long-line fishing vessels that operated in CCAMLR Convention Area in 2015/16 fishing season

Three Korean fishing vessels conducted toothfishes longline fishery in Southern Indian Ocean area (i.e. Area 51) from 2011 to 2013, and information on the collected 10 CCAMLR tag recaptures is being submitted.

Depredation is experienced by several fisheries within the CCAMLR Area, however not all fisheries have a data collection programme that is sufficiently long established, or detailed, to allow for model estimation of the lost catch. A new method was developed in 2014 that used an observed change in ratios of toothfish to grenadiers on depredated longlines, and proved to estimate losses Read More
Soumis par:
Marta Söffker (Union européenne)

Approuvé par:
Chris Darby (Royaume-Uni)

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This paper presents a proposal for a longline survey connecting the currently undertaken surveys in Subarea 48.2 with the established fishery in Subarea 48.4. The research objectives include determining population connectivity between these Subareas, improving understanding of Dissostichus sp population structures in this region, and improving available data on bathymetry and Read More
Soumis par:
Marta Söffker (Union européenne)

Approuvé par:
Chris Darby (Royaume-Uni)

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Throughout exploratory longline fishing within Division 58.4.1 Australian vessel FV Antarctic Discovery deployed benthic video camera systems 15 times and environmental data loggers 33 times. Substrate was generally soft sediments or a combination of soft sediments and cobble stones. Vulnerable Marine Ecosystem indicator species were seen in low numbers within videos. The data Read More
Soumis par:
Dale Maschette (Australia)

Approuvé par:
Dirk Welsford (Australia)

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Robust stock assessments and catch limits 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. A research plan (WG-FSA-15/47 Rev. 1) was developed under Conservation Measure 41–01 for an Australian vessel, FV Antarctic Discovery, to Read More
Soumis par:
Peter Yates (Australia)

Approuvé par:
Dirk Welsford (Australia)

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Model results and diagnostics for the integrated assessment model for krill in Subarea 48.1 are summarized. Alternative potential decision rules based on the distributions of krill spawning biomass during different reference periods, and potential catches associated with those rules, are described. The model and procedures outlined in this paper synthesize work reported to CCAMLR WG-EMM, WG- Read More
Soumis par:
Doug Kinzey (États-Unis d'Amérique)

Approuvé par:
George Watters (États-Unis d'Amérique)

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At the EEM-15, it was agreed that detailed information on survey design of the dedicated cetacean sighting vessel-based krill (CSVK) survey by Japan, would be submitted with data from the first of these annual surveys to the next meeting of WG-SAM (2016), to assess the survey design, in particular the trade-offs between the primary goal of gathering information on cetaceans versus the Read More
Soumis par:
Luis Alberto Pastene Perez (Japon)

Approuvé par:
Taro Ichii (Japon)

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Catch at length is an important input into any stock assessment. Consequently, collecting length data from the catch is a task undertaken by all at sea observes in CCAMLR fisheries. Although analyses in the past have looked to the optimal design of the observer program, in terms of levels of coverage of vessels and hauls (e.g., Agnew et al., 2009; 2010), less attention have been focussed on Read More
Soumis par:
Dirk Welsford (Australia)

Approuvé par:
Dirk Welsford (Australia)

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Following the Spanish research plan approved by the SC-CCAMLR XXXII, during the third year of the multi-year research survey in the Division 58.4.1, as far as the ice condition allowed, the F/V Tronio has returned to the same places surveyed in the previous seasons and a prospection all along the area has been carried on.

Preliminary results of the last 2015/16 season survey Read More
Soumis par:
Roberto Sarralde Vizuete (Espagne)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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A multi-year research plan as outlined in CM 41-04 (2012, 2013 & 2014) was initiated in Statistical Subarea 48.6 by Japan and South Africa during the 2012/13 fishing season. Two vessels participated in the research project in each of the three fishing seasons and the progress achieved during the first 3.5 years is reported.

The emphasis of the progress report is on block 486_2, Read More
Soumis par:
Sobahle Somhlaba (Afrique du Sud)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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We analyzed the sea-ice concentration for the southern ice-shelf areas of 48.6 during the latest four seasons using two satellite data, LANCE-MODIS data and AMSR2 of “Shizuku” processed byUniversity Bremen.

Figure 1 shows the overall of the topography and ice condition with Shinsei maru No. 3 trace in 2015/16 season (the detailed trace will be presented at the PowerPoint slide in the WG Read More
Soumis par:
Sobahle Somhlaba (Afrique du Sud)

Approuvé par:
Doro Forck (Secrétariat de la CCAMLR)

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