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1. ESTIMATION OF MANAGEMENT REFERENCE POINTS CONSISTENT WITH THE CATCH TRIGGER LEVEL FOR THE ANTARCTIC KRILL FISHERY IN AREA 48

   biomass reference points for the krill fishery in CCAMLR Area 48 consistent with the catch trigger level ... of F and SSB reference points for the krill stock in Area 48 consistent with the catch trigger level ... are 0.0159 (95 % CIs: 0.00750 – 0.0357) and 97.7 % SSB0 (80 % CIs: 71.6 – 135 %) respectively. In ... increases substantially with increased recruitment variability, though in absolute terms remains negligible ...

   Meeting Document : WG-EMM-11/17 : Author(s): T. Peatman, J. Moir Clark, D.J. Agnew (UK)

2. Summary of the toothfish fishery and tagging program in the Amundsen Sea region (SSRUs 882C–H) to 2018/19

   2014. Few age data are currently available after 2014. We recommend that further ageing of toothfish in ... that catch limits in the ASR be calculated following the trend analysis rules developed by WG-FSA for ... -year Chapman estimates and allowing a maximum of 20% in the catch limit for 88.2H and research block ... 882_2 are: 882H: 240 t catch and allowing a maximum of 20% change in the catch limit from 200 t ...

   Meeting Document : WG-FSA-2019/12 : Author(s): J. Devine and S. Parker

3. Evaluating length-frequency data and length-based performance indicators in new and exploratory fisheries

   Abstract:  Length-frequency data are routinely collected in CCAMLR’s fisheries and used as inputs ... to stock assessments. In CCAMLR’s new and exploratory fisheries, stock assessment techniques are ... still in development and robust conclusions on stock status based on length-frequency data alone have ... been difficult. In this paper, we show that length-frequency data on their own have little inherent ...

   Meeting Document : WG-FSA-10/43 : Author(s): P.E. Ziegler, D.C. Welsford and A.J. Constable (Australia)

4. Comparison of 1981 FIBEX survey and 2000 CCAMLR survey on oceanographic variability in the Scotia Sea, Antarctica

   ) in order to investigate differences of oceanographic structures in the same area and summer season ... between the 1981 FIBEX survey and 2000 CCAMLR survey in the Scotia Sea, Antarctica. As a result, the ... distribution range of the cold Antarctic Surface Water less than 0°C in the 1981 FIBEX survey is clearly larger ... than the 2000 CCAMLR survey. In other words, the differences of the both surveys suggested that the ...

   Meeting Document : WG-EMM-04/45 : Author(s): M. Naganobu and Y. Yoda (Japan)

5. Pursuit and polynyas in the Ross Sea, Antarctica

   influence biological activity. We pursued daily transition of polynyas in the Ross Sea, Antarctica from 1978 ... polynya existed in the inner area of the Ross Sea in November of the each year. The shape of the polynya ... changed remarkably in several days. The polynyas have the range of approximately 500 km from the bottom to ... the entrance of the Ross Sea. The polynyas usually open to the northern oceanic water late in December ...

   Meeting Document : WG-EMM-98/31 : Author(s): M. Naganobu, T. Tanaka, Y. Okada, N. Kimura and S. Matsumura (Japan)

6. Nine years of tag-recapture in CCAMLR Statistical Subarea 48.3 – Part II: Spatial movement and analysis

   toothfish (Dissostichus eleginoides) in Subarea 48.3. In addition to providing information on tagging ... procedure, Patagonian toothfish biology, growth and local movement of Patagonian toothfish in 48.3 ... (presented in WG-SAM-14/35), it describes the spatial movements and regional connectivity in Subarea 48.3 ... successful in providing substantial information for the stock assessment and that it can give a first ...

   Meeting Document : WG-FSA-14/49 : Author(s): M. Soeffker, C. Darby and R.D. Scott (United Kingdom)

7. An ecological risk assessment of current conservation measures for krill fishing in East Antarctica (CCAMLR Divisions 58.4.1 and 58.4.2)

   Abstract:  Australia is adapting the risk assessment framework used in Area 48 to assess the risks ... involved in any redevelopment of a commercial krill (Euphausia superba) fishery in CCAMLR Divisions 58.4.1 ... has a high likelihood of achieving CCAMLR’s objectives in this region. This paper outlines a ... disproportionately concentrating catches in areas that are also important to krill predators. In particular, this ...

   Meeting Document : WG-EMM-18/37 : Author(s): N. Kelly, L. Emmerson, S. Kawaguchi, C. Southwell and D. Welsford

8. Stable isotope analysis reveals trophic variation in adult Antarctic krill (Euphausia superba) around the Antarctic Peninsula from austral fall to early winter

   Abstract:  The Antarctic krill (Euphausia superba) is a key species in the Southern Ocean ... ecosystem and an important link in the food web of the Antarctic ecosystem. The trophic information for this ... known overwintering mechanisms. However, the few studies on the topic differ in their results, in terms ... variation in δ 13 C and δ 15 N values of adult krill in the Antarctic Peninsula, in the austral fall (April ...

   Meeting Document : WG-EMM-2019/P03 : Author(s): H.T. Zhang, G.P. Zhu, Q. Song, S.Q. Wang, Y. Yang and Q.Y. Yang

9. The Role of Fish as Predators of Krill (Euphausia superba) and Other Pelagic Resources in the Southern Ocean

   Abstract:  First attempts were made in the early 1980’s to estimate the krill and pelagic food ... -Antarctic Zone in the late 1980’s and early 1990’s when these areas were exploited commercially and a larger ... taken by mesopelagic fish in the Atlantic Ocean sector only. However, these estimates still have wide ... hydro-acoustic biomass estimates conducted in the late 1980’s and the lack of quantitative food ...

   Meeting Document : CCAMLR-IWC-WS-08/09 : Author(s): Collins, M.A., Williams, R., Agnew, D.J., Kock, K.-H., Belchier, M., Shust, K.V., Welsford, D., Hanchet, S., Pshenichnov, L., Barrera-Oro, E.

10. An updated spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region

    model for Antarctic toothfish in the Ross Sea region, for a medium scale spatial resolution (189 spatial ... cells) covering the Ross Sea region. We build on the previous working medium-scale model in which the ... population was restricted to those cells in which at least 5% of cell area was of a depth deemed suitable as ... unsatisfactory in previous models, with a much flatter maturity ogive than that derived through histology. In the ...

    Meeting Document : WG-SAM-14/31 : Author(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)

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