The Antarctic toothfish (Dissotichus mawsoni) is an ecologically and commercially relevant fish. Lacks of information on the species come from the traditional fishery-based methodology to collect samples, which does not cover all the areas of its distribution. Here we want to promote an alternative non-extractive methodology to expand the routine collection of data in areas not accessible by the fishing vessels and under protection, as the Ross Sea shelf zones seasonally covered by sea-ice: the use of Baited Remote Underwater Video camera (BRUV). From the video they can be inferred information on abundance and distribution of the species. During the last three years, a pilot study has been carried out in McMurdo Sound and Terra Nova Bay, and first results are reported. We propose some improvements of the tool and an approach for a robust sampling design, to obtain valid information on the relations between Antarctic toothfish and environmental parameters of the shelf areas. We have designed a random, spatially stratified, survey approach using comparable, standardized sampling gears and methodologies. We expect from the FSA group suggestions and the support of the design, to make it available for all the Members interested to take part in the data collection.

This paper outlines stock assessment related work that has been done in Subarea 48.6 since 2012 and some review of work that could offer lessons in how to advance stock assessment in Subarea 48.6 in 2019.

As agreed by SC-CAMLR in 2017 (SC-CAMLR-XXXVI, paragraph 10.17), a joint workshop was held between the Southern Ocean Observing System (SOOS) and CCAMLR in April 2018 to:

• Improve understanding of roles and operations between the two communities
• Identify reciprocal pathways of communication for exchange of information
• Identify synergies in data requirements and data management planning

This workshop was hosted and sponsored by the Australian Research Council’s Antarctic Gateway Partnership and SOOS.

A full workshop report is available http://soos.aq/resources/reports?view=reports. The workshop participants made a number of recommendations. All recommendations pertaining to Objective 3 are covered in SC-CAMLR-XXXVII/BG/19 submitted jointly by the USA, Belgium and SOOS.

This report provides an overview of:

• Enhancing SOOS-CCAMLR Collaboration
• SOOS Regional Coordination Networks
• SOOSmap data discovery tool
• Database of Upcoming Expeditions to the Southern Ocean

A preliminal CASAL model was constructed for D. mawsoni at the research block 48.6_2. The model assumes that single sex and age structured model without considering IUU. Tag release data during 2012–2017 was used. Catch data during 2006–2017 was used as fishery data. 

In the MPD, age and CPUE fit well. On the otherhands, fit of tag release are relatively low level, especiall in 2016. The B0, B2016, and current vulnerable biomass are estimated to be 17718.8, 17007.3, and 6986.2 tonnes. The MCMC estimates of B0 (18143.15t) and current biomass (17431.60 t) are much higher than the latest biomass estimates by CPUE-by-seabed method (3029 t) and Chapman method (4223 t). CCAMLR decision rule risk under the current catch level (170 t) become nearly zero (Table 3). Although the preliminal CASAL model seems to converge well, We need futher discussion to improve the CASAL model for D. mawsoni at Subarea 48.6.

This paper represents the annual report of a multi-Member longline survey on Antarctic toothfish (Dissostichus mawsoni) at Subarea 48.6 in the 2017/18 fishing season by Japan and South Africa. The data set, C2 and Observer data, was provided by the CCAMLR Secretariat on the 3th August, 2018. In this paper, the data set during current fishing season (2017/18) was used for reporting the quantity of data, samples collected, and results of quick analysis as a progress toward research millstones. The research operations at Subarea 48.6 have not yet been completed in the 2017/18 fishing season. Also, some data is not reflected in tables and figures because it is still under process.

This paper represents the by-catch analysis results of a multi-Member longline survey on Antarctic toothfish (Dissostichus mawsoni) at Subarea 48.6 by Japan and South Africa. The data set, C2 and scientific observer data, was provided by the CCAMLR Secretariat on the 3th August, 2018. In this paper, the C2 data from 2012/2013 to 2016/2017 fishing seasons was used for the analysis because scientific observers have ceased recording number and weight of by-catch fish with some lines. 

ANT (Antimora rostrata), GRV (Macrourus spp.), ICX (Channichthyidae spp.), and MRL (Muraenolepis spp.) are common by-catch species. These common by-catch species indicate small temporal change of their by-catch pattern.

This paper represents the bycatch analysis results of a multi-Member longline survey on Patagonian toothfish (Dissostichus eleginoides) at Division 58.4.3a by France and Japan. The data set, C2 and scientific observer data, was provided by the CCAMLR Secretariat on the 3th August, 2018. In this paper, the C2 data from 2012/2013 to 2016/2017 fishing seasons was used for the analysis because scientific observers have ceased recording number and weight of by-catch fish with some lines. ANT (Antimora rostrata), GRV (Macrourus spp.), RFA (Raja taaf), and SRX (Rajihormes spp.) are common by-catch species. These common by-catch species indicate some temporal change of their by-catch pattern.

This paper represents the by-catch analysis results of a multi-Member longline survey on Patagonian toothfish (Dissostichus eleginoides) at Division 58.4.4b by France and Japan. The data set, C2 and scientific observer data, was provided by the CCAMLR Secretariat on the 3th August, 2018. In this paper, the C2 data from 2012/2013 to 2016/2017 fishing seasons was used for the analysis because scientific observers have ceased recording number and weight of bycatch fish with some lines. ANT (Antimora rostrata), GRV (Macrourus spp.), and RFA (Raja taaf) are common by-catch species, which are caught at both research blocks 58.4.4b_1 and 58.4.4b_2. These common by-catch species indicate some temporal change of their bycatch pattern.

This paper represents the annual report of a multi-member longline survey on Patagonian toothfish (Dissostichus eleginoides) at Division 58.4.4b in the 2017/18 fishing season by France and Japan. One fishing cruise by French vessel (Ile Bourbon) took place in March 2018 and caught 1.6 tonne of D. eleginoides in 58.4.4b_2. The data set, C2 and Observer data, was provided by the CCAMLR Secretariat on the 3th August, 2018. In this paper, the data set during current fishing season (2017/18) was used for reporting the quantity of data, samples collected, and results of quick analysis as a progress toward research millstones. The research operations at 58.4.4b have not yet been completed in the 2017/18 fishing season. Also, some data is not reflected in tables and figures because it is still under process.

Japan and France revised a plan to continue to 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-XXXIII, paragraph 3.208), which requested that research activities be coordinated between France and Japan so that selectivity and catch rates can be standardized across the vessels and impacts of depredation be minimized.

Additional outcomes of the research relate to documenting the degree of depredation, tagging toothfish for biomass estimation and for stock linkage studies, and collecting information on distribution, relative abundance, and life history of bycatch species.

The plan represents a continuation of previous surveys by Japan and France, without significant change from the previous research activities. Summary of revised points from WG-SAM-18/03 is as follows:

- Updated the timeline table of milestones to get closer to the original timeline (WG-FSA-16/33) and to clarify the meeting to be reported

- Added the table to track the changes of milestones (Appendix 1)

- Added the list of comments/recommendations by WGs (Appendix 2)