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1. Evidence of two stocks of Champsocephalus gunnari in the South Georgia region, CCAMLR fishing Area 48.3

   and those at South Georgia must be the result of different spawning seasons and/or egg development ... periods and/or growth rates. This suggests that there are two separate stocks of C. gunnari in a single ... larvae on the South Georgia shelf which is comparable with previous reports of early growth in C. gunnari ...

   Meeting Document : WG-FSA-94/16 : Autor(es): A.W. North (United Kingdom)

2. Survey estimates of recruitment of toothfish in Subarea 48.3

   for South Georgia. Although it is easy to spot cohorts, the size of individual cohorts can not be ... consistently determined from the survey data. The expected reduction in cohort density with time at a log-scale ... surveys. We conclude that survey-based estimates of recruitment biomass are not reliable input data for ...

   Meeting Document : WG-FSA-SAM-04/16 : Autor(es): Collins, M., Wakeford, R.C., Moir-Clark, J., Belchier, M., Agnew, D.J.

3. A revised assessment of Patagonian toothfish in Subarea 48.4

   , whilst D. mawsoni are mainly caught in the south. WG-FSA 2012 concluded that species specific assessments ... , covering the whole of the subarea, would be a more appropriate method for assessing the stocks than the ... . The revised assessment is compared with the previous assessment for this stock. Data deficiencies and ...

   Meeting Document : WG-SAM-13/24 : Autor(es): R. Scott (United Kingdom)

4. Preliminary assessment of Patagonian toothfish in Subarea 48.4

   in the north, whilst D. mawsoni are mainly caught in the south. CCAMLR WG-FSA 2012 concluded that ... species specific assessments, covering the whole of the subarea, would be a more appropriate method for ... pattern and revised growth assumptions. The revised assessment is compared with the previous assessment ...

   Meeting Document : WG-FSA-13/31 : Autor(es): R. Scott and V. Laptikohvsky (United Kingdom)

5. Continuation of multi-Member research on the Dissostichus spp. exploratory fishery in East Antarctica (Divisions 58.4.1 and 58.4.2) by Australia (notification ID 98422, 98423), France (94903, 94904), Japan (94886, 94887), Republic of Korea (94889, 94890) and Spain (94835)

   milestones in accordance with ANNEX 24-01/A. In 2016, the Scientific Committee agreed that the research plan ... rules remain to be determined for these Divisions. WG-FSA-16/29 outlines the first multi-member ...

   Meeting Document : WG-SAM-17/08 : Autor(es): Delegations of Australia, France, Japan, Republic of Korea and Spain

6. Estimating density and biomass of Antarctic krill around South Sheltland Islands using the 2-dB difference method

   estimated using an acoustics survey. Acoustic data were collected with 38 and 120 kHz from April 13 to 24 in ... integration (SHAPES module within that software for swarm identification) based on data from a transect-based ... survey. The weighted krill density and biomass were estimated to be 0.20 g/m 2 and 18 thousand tons (CV ...

   Meeting Document : WG-EMM-17/08 : Autor(es): S.-G. Choi, K. Lee and D. An

7. Biomass estimates of Antarctic krill based on survey conducted by the Chinese fishing vessel FV Fu Rong Hai during the 2019 Area 48 survey

   shown that mean krill biomass density was 80.7 g m-2 with a CV of 13.6% in the survey area. However, the ... krill biomass estimates might be updated pending on the outcome of krill length clustering analysis and ...

   Meeting Document : SG-ASAM-2019/07 : Autor(es): X. Wang, X. Yu, X. Zhao, J. Zhang, G. Fan, J. Zhu and Y. Ying

8. Estimating food consumption of marine predators: Antarctic fur seals and macaroni penguins

   and macaroni penguin Eudyptes chrsolophus) that feed on krill in the Southern Ocean were used as ... examples to test the algorithm. A sensitivity analysis showed that estimates of prey consumed were most ... algorithm showed that the seasonal demand for food peaked in both species in the second half of the breeding ... macaroni penguins compete for krill with a commercial fishery, these results provide an insight into the ...

   Meeting Document : WG-EMM-02/23 : Autor(es): I.L. Boyd (United Kingdom)

9. EXTRAPOLATING CONTINUOUS PLANKTON RECORDER DATA THROUGH THE SOUTHERN OCEAN USING BOOSTED REGRESSION TREES

   Plankton Recorder (SO-CPR) Survey. We demonstrate that it is possible to obtain a relationship between both ... data withheld from the fitting. We found that the data withholding of data from the model fitting must ... be done on a tow by tow basis as there is significant within-tow correlation. (2) Spatial cross ... subsequently to test the predictive accuracy of the model. These cross-validation methods showed that the ...

   Meeting Document : WG-SAM-08/12 : Autor(es): M.H. Pinkerton, A.N.H. Smith (New Zealand), B. Raymond, G. Hosie (Australia) and B. Sharp (New Zealand)

10. Spatial and seasonal distribution of adult Oithona similis in the Southern Ocean: predictions using boosted regression trees

    waters. We demonstrate that it is possible to obtain reasonable models for both the presence (area under ... . Our analyses support the hypothesis that adult O. similis abundance is related to environmental ... , with surface abundances 20% higher at night than during the day. There was no evidence of diel ... area in the outer Bellingshausen Sea. We recommend that a database of all available net-haul data on ...

    Meeting Document : WG-EMM-10/P14 : Autor(es): M.H. Pinkerton, A.N.H. Smith, B. Raymond, G.W. Hosie, B. Sharp, J.R. Leathwick and J.M. Bradford-Grieve

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