WG-SAM-18

Sea ice is a major constraint of fishery performance in the Southern Ocean seasonal sea ice zone. We use sea ice concentration data from 2002-2017 that cover the wider Weddell Sea to establish statistical models of (i) accessibility, i.e. the probability that a particular area is navigable by fishery vessels at a given time, and of (ii) repeated accessibility, i.e. the probability that a Read More
Submitted By:
Mr Hendrik Pehlke (Germany)

Approved By:
Professor Thomas Brey (Germany)

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A proposal from Spain to join the current research proposal coordinated between JAP and ZAF is presented. 

In the SC-2017 report, the Scientific Committee noted that the future inclusion of an ice strengthened vessel, in an expanded research plan for this area, would address the capacity issues that the research conducted by Japan and South Africa were experiencing (parag 3.109) Read More
Submitted By:
Mr Roberto Sarralde Vizuete (Spain)

Approved By:
Mr Roberto Sarralde Vizuete (Spain)

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Japan and France propose a plan to continue investigate the populations of Patagonian toothfish (Dissostichus eleginoides) in the Division 58.4.4b during the next fishing season (2018/19) from 2017/18 onwards, using standardized longline gear, and established tagging techniques. The proposed research is relevant and take into account issues raised by the Scientific Committee (SC-CAMLR Read More
Submitted By:
Dr Takehiro Okuda

Approved By:
Ms Chiaki Yamada (Japan)

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Japan and South Africa propose to continue investigating the population structure and various demographic parameters of Antarctic toothfish (Dissostichus mawsoni) in the Subarea 48.6 in 2018/19 using standardized longline gear, established tagging techniques, and pop-up tags. The proposed research is pertinent to issues raised by the Scientific Committee (SC-CAMLR-XXXV, paragraph 3.3. Read More
Submitted By:
Dr Takehiro Okuda

Approved By:
Dr Taro Ichii

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The scientific survey was conducted by the Greenstar (KOR) in the research block 883_3–883_5. Due to extreme ice conditions covering the southern part of 88.3, the Janas (NZL) was not able to conduct its part of the survey. The total catch of D. mawsoni was 38,856 kg comprised of 1,380 individuals. The CPUE for Dissostichus mawsoni indicated regional differences among the Read More
Submitted By:
Dr Sangdeok Chung (Korea, Republic of)

Approved By:
Dr Seok-Gwan Choi (Korea, Republic of)

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Russian program provides proposals to study 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 Federation is going to continue investigation for toothfish in Ross Sea. The previous Russian program was undertaken in the Subarea 88.2 in 2010-2012. This paper presents the   research program in the frame of the research and monitoring associated with the Ross Sea region marine protected area.

Russian research program have objectives to investigate the life-cycle, Read More
Submitted By:
Dr Svetlana Kasatkina (Russian Federation)

Approved By:
Dr Svetlana Kasatkina (Russian Federation)

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In Division 58.4.3a, since 2012, research fishing has been conducted in the research block by three vessels using longline: “Shinsei Maru No. 3” (Japan), “Saint André” (France) and “Mascareignes III” (France). The first Franco-Japanese exploratory longline fishery research plan for Dissostichus spp. in Division 58.4.3a (WG-FSA-16/55) was presented to WG-FSA-16, which included Read More
Submitted By:
Mr Romain Sinegre (France)

Approved By:
Ms Doro Forck (CCAMLR Secretariat)

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We propose to test three hypotheses to describe the reproductive ecology of Antarctic toothfish (Dissostichus mawsoni):

1) Antarctic toothfish eggs are buoyant and accumulate under sea ice. If true, this would retain eggs near the spawning locations under the vast sea ice extent and once broken up in the spring, may provide access to a productive pagophilic ecosystem Read More
Submitted By:
Mr Alistair Dunn

Approved By:
Mr Alistair Dunn

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At its 2011 meeting, the Scientific Committee agreed that a time series of relative abundance from a well-designed survey would be a useful input into the Ross Sea stock assessment model. In this paper we provide results of the seventh annual survey in the time series. The objectives of this survey included monitoring sub-adult (≤ 110 cm TL) toothfish in the south of SSRUs 881.J and 881.L in Read More
Submitted By:
Mr Alistair Dunn

Approved By:
Mr Alistair Dunn

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Ukraine proposes to carry out a scientific survey of Dissostichus spp. by bottom longline in the eastern part of Subarea 48.1.

The research of Dissostichus in Subarea 88.3 carried out by Chile in 1998, New Zealand in 2005, Russia in 2011 and 2012 and the Republic of Korea in 2017 and 2018. It was noted that no tagged fishes were recaptured during the previous research activities. Studies are planned to be conducted from January to March, as ice conditions permit. It is planned that the number of longline sets Read More
Submitted By:
Dr Leonid Pshenichnov

Approved By:
Dr Kostiantyn Demianenko (Ukraine)

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Ukraine proposes to continue survey in the Subarea 48.2 in same boundary for the fifth year of research.

The Casal2 software implements an updated generalised age-structured marine population model that allows more flexibility in specifying the population dynamics, parameter estimation, and model outputs than CASAL. Models are built with user-defined categories such as area, sex and maturity. These structural elements are generic and not predefined (as they are in CASAL), but are easily Read More
Submitted By:
Mr Alistair Dunn

Approved By:
Mr Alistair Dunn

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This paper outlines the specific research objectives and plan to achieve them for the third year of an agreed 3-year longline survey, in the wider context of connecting the recently undertaken surveys in Subarea 48.2 with the established fishery in Subarea 48.4. The overall research objectives include determining population connectivity between these Subareas, improving understanding of Read More
Submitted By:
Ms Kylie Bamford (United Kingdom)

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Following the submission of a first draft Conservation Measure for establishing a MPA in the Weddell Sea (WSMPA) to CCAMLR 2016, Germany has carried out further work on the WSMPA proposal with a view for a revised CM proposal to be submitted by the EU to CCAMLR 2018.

This document informs SAM about the following revisions carried out to the WSMPA proposal which would fall under the Read More
Submitted By:
Dr Katharina Teschke

Approved By:
Professor Thomas Brey (Germany)

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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 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 Scientific Read More
Submitted By:
Dr Peter Yates (Australia)

Approved By:
Dr Dirk Welsford (Australia)

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We provide a photographic reference set for Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea region. The photographs were derived from the four otolith reference set blocks used by New Zealand with the “sister” otoliths provided to CCAMLR for use by other Members. Two photographs are provided for each otolith; one of the prepared otolith surface alone, and a second with Read More
Submitted By:
Mr Alistair Dunn

Approved By:
Mr Alistair Dunn

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Main two methods, which are used for the estimation of abundance/stocks of toothfish in the Antarctic marine areas, are the method based on tag recaptures and the method grounding on the CPUE data. But calculation of toothfish abundance with using these methods demands a number of assumptions, which sometimes broaden too much the possible values of the calculated parameters. The authors Read More
Submitted By:
Dr Kostiantyn Demianenko (Ukraine)

Approved By:
Dr Kostiantyn Demianenko (Ukraine)

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During the 2017/2018 toothfish season in the Ross Sea, the New Zealand flagged Janas trialled a scientific electronic monitoring system during fishing operations in the Ross Sea region. The integrated system collected video data from three cameras (two at the starboard hauling area and one at the stern gear deployment area) along with time-linked data on vessel operations and location Read More
Submitted By:
Mr Alistair Dunn

Approved By:
Mr Alistair Dunn

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Implementation of the Ross Sea region Marine Protected Area (CM 91-05) and the associated Research and Monitoring Plan (SC-CAMLR XXXVI-20) requires multidisciplinary research efforts by Members. Some of the research required will necessarily be implemented through CCAMLR approved fisheries research programmes proposed under CM 24‑01. Although considerable fisheries research is already underway Read More
Submitted By:
Mr Alistair Dunn

Approved By:
Mr Alistair Dunn

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This paper presents a ‘first-step’ proposal for CCAMLR to consider the effects of environmental variability and change on management advice from toothfish assessments. We focus on changes to environmental conditions that are maintained over a number of years, which includes the effects of global climate change. The effects of environmental variability and change on toothfish population Read More
Submitted By:
Mr Alistair Dunn

Approved By:
Mr Alistair Dunn

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Catch limits for toothfish in research blocks were set for the 2017/18 season using a qualitative analysis of trends in biomass estimated in each research block and a series of simple decision rules developed by WG-FSA-17. The Scientific Committee recommended that the approach be further developed and tested as a matter of priority for WG-SAM-18. We formalised and codified the rules and Read More
Submitted By:
Mr Alistair Dunn

Approved By:
Mr Alistair Dunn

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Features of the implementation of the tagging program on vessels of Ukraine CALIPSO, KOREIZ, MARIGOLDS, SIMEIZ are presented.

A finfish survey was completed using bottom trawl fishing gear according to a random stratified sampling design between 50 and 500 m on shelf areas of Subarea 48.1 (Elephant Island) and Subarea 48.2 (South Orkney Island). The sampling stations were set in approximately the same geographical coordinates as those on previous R/V 'Polarstern' surveys around Elephant Island (Kock & Read More
Submitted By:
Dr César Cárdenas

Approved By:
Dr César Cárdenas

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In the fishing season of 2018, three Ukrainian fishing vessels collected oceanographic data (salinity and temperature). The method of data collection is described. A preliminary analysis of the data was carried out.

The fourth 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 fourth year survey design was slightly amended in comparison with the one of the second year and approved by WGs SAM, FSA and SC CCAMLR. Read More
Submitted By:
Dr Leonid Pshenichnov

Approved By:
Dr Kostiantyn Demianenko (Ukraine)

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The document presents the experience of the age determination of toothfish of the genus Dissostichus by recording structures (otoliths). Sampling processing is carried out on the basis of annual data collected in the CCAMLR Convention Area. The equipment used, the procedure for processing and reading age are described. The achieved volumes and results are given. And also the problems Read More
Submitted By:
Dr Leonid Pshenichnov

Approved By:
Dr Kostiantyn Demianenko (Ukraine)

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This paper represents the annual report of a multi-member longline survey on Patagonian toothfish (Dissostichus eleginoides) at Division 58.4.4b in 2016/17 fishing season by France and Japan. The data set, C2 and Observer data, was provided by the CCAMLR Secretariat on the 20th April 2018 (30 May, 2018 for September to November French cruise). In this paper, the data set during last Read More
Submitted By:
Dr Takehiro Okuda

Approved By:
Dr Taro Ichii

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This paper represents the annual report of a multi-member longline survey on Antarctic toothfish (Dissostichus mawsoni) at Statistical Subarea 48.6 for 2016/17 fishing season by Japan and South Africa. The data set, C2 and Oｂserver data, was provided by the CCAMLR Secretariat on the 20th of April, 2018. In this paper, the data set during last fishing season (2016/17) was used for Read More
Submitted By:
Dr Takehiro Okuda

Approved By:
Dr Taro Ichii

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Annex paper to the WS-DmpH-18 meeting report (part 2 of 2)

Based on a recommendation by WG-FSA in 2017 (para. 3.13), this paper presents examples for a set of standard diagnostics including R code to be used for mackerel icefish (Champsocephalus gunnari) stock assessments presented to WG-FSA.

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 outlined the first multi-member toothfish exploratory fishery research plan for these Divisions, including Read More
Submitted By:
Dr Peter Yates (Australia)

Approved By:
Dr Dirk Welsford (Australia)

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Casal2 (pronounced Casal-two) has replaced CASAL, New Zealand’s integrated fish stock assessment pack-age since 2002. Casal2 replicates most of CASAL’s functions such as many stocks, fisheries, and areas; age-or length-based dynamics; the use of several data sources (e.g., abundance indices, age frequencies, andtagging), but it has been extended into a generalised modelling tool and it uses Read More
Submitted By:
Mr Alistair Dunn

Approved By:
Mr Alistair Dunn

Publication:
Fish. Res., 183 (2016): 498–505

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