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1. Revised research plan for the exploratory longline fishery for Dissostichus spp. in 2014/15 in Division 58.4.3a

   improve the estimation of current biomass. The stock size in division 58.4.3a was estimated during WG-FSA ... 2013 using the Petersen estimator, CASAL model and the CPUE x seabed analogy method. The estimates of ... biomass are highly biased, because catch data used in the calculation derived from a small location at ... which catch rates are known to be much lower. Given these results and the concentration of fishing ...

   Meeting Document : WG-FSA-14/05 : Author(s): Delegation of France

2. Comparison of the catches and biological characteristics of Dissostichus mawsoni in Subarea 88.1 in seasons of 2002/03 and 2003/04

   Abstract:  This report presents results of an exploratory fishery for Antarctic toothfish (D ... . mawsoni) conducted by the Russian vessels “Yantar” and “Volna” for two seasons of 2002/03 and 2003/04. The ... analysis of data collected relates to catch composition, effort, CPUE, and biological characteristics in ... different SSRU, month and depth of sets longlines. The comparison of these resultants showed that in the ...

   Meeting Document : WG-FSA-04/84 Rev. 1 : Author(s): K.V. Shust, N.V. Kokorin and A.F. Petrov (Russia)

3. Estimating future krill catches that meet the CCAMLR and alternative decision rules for FAO Subarea 48.1 using an integrated assessment model

   then applies these parameter values to future projections (2015-2034) at pre-specified levels of future ... estimate the effects of the fishery on the krill population. The model estimates parameters representing ... the CCAMLR decision rules. An alternative pair of decision rules to those currently employed by CCAMLR ... spawning biomass instead of to projections with no fishing. Catch levels that meet the various decision ...

   Meeting Document : WG-EMM-15/51 Rev. 1 : Author(s): D. Kinzey, G.M. Watters and C.S. Reiss (USA)

4. The toothfish fishery and tagging program in the Amundsen Sea region (SSRUs 882C–H) to 2016/17

   of tagged fish at liberty and therefore the number of recaptures of tagged fish is likely to increase ... plan since the 2015 fishing season. The aim of the research plan is to collect sufficient information ... to carry out a reliable stock assessment of the toothfish stock in that area. In this report, we ... precautionary. In the 2016 and 2017 seasons, a total of 19 tagged fish (excluding within season recaptures) were ...

   Meeting Document : WG-FSA-17/39 : Author(s): S. Parker and S. Mormede

5. An integrated stock assessment for the Crozet Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Subarea 58.6

   (Dissostichus eleginoides) fishery of the Crozet Islands, CCAMLR sub-area 58-6, with data up to the end of the ... season 2018/2019 (End of August 2019). This updated assessment model is based on the best available data ... data that account for fish removals (fishing mortality and depredation) and support the estimation of ... their associated selectivity functions. Compared to the previous assessment presented at WG-FSA 17 ...

   Meeting Document : WG-FSA-2019/57 Rev. 1 : Author(s): F. Massiot-Granier, G. Duhamel and C. Péron

6. Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass

   the spawning stock (as a proportion of SB0) at the end of the projection run (level of escapement ... , while the second is a generalised yield model. The decision rules relate to the effects of a specified ... long-term annual yield (γ) on (i) the probability of the spawning stock being reduced below a set ... proportion of SB0 during a projection run (probability of critical depletion) and (ii) the median status of ...

   Meeting Document : WG-EMM-97/45 : Author(s): de la Mare, W.K., Constable, A.J.

7. Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels

   Paper Title:  Line weights of constant mass (and sink rates) for Spanish system Patagonian ... -system longline vessels to attach 8.5 kg weights at 40 m intervals on longlines to minimise interactions ... with seabirds. The weights typically used are collections of rocks enclosed in netting bags. During ... become progressively lighter, requiring ongoing repair. This problem can be solved by use of ... and at each end of the basket. As lines are payed out, crew con- nect the hauling and hook lines with ... Spanish system, at the end of each set of 10 replicates, 200 m of connecting line were deployed to ... , Wildlife Computer, USA) programmed to record depth at 0.5 m resolu- tion every second. A total of 60 TDRs ... -system longline vessels attached midway between line weights at the aft end of the second of the three ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Author(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon

8. Development of methods for evaluating the management of benthic impacts from longline fishing using spatially explicit production models

   size of these impacts in the scenarios tested were small, we recommend that research be focused, at ... Abstract:  An important management objective for CCAMLR in the high seas region of the Antarctic ... is to develop appropriate methods of monitoring and managing impacts of bottom fisheries on ... investigate a range of simple scenarios for simulating the effect and management of benthic impacts from ...

   Meeting Document : WG-SAM-10/19 : Author(s): A. Dunn, S.J. Parker and S. Mormede (New Zealand)

9. Assessment models for Antarctic toothfish (Dissostichus mawsoni) in SSRU 882E including data from the 2005/06 season

   Abstract:  We provide an update of the Bayesian sex and age structured population stock assessment ... -at-age and tag-recapture data from New Zealand and all vessels. The updated reference case resulted ... in a slightly higher estimate of initial biomass than in 2005, though this was mostly due to a ... different assumption of the level of natural mortality (M=0.13 y-1), and the revised length-weight and ...

   Meeting Document : WG-FSA-06/48 : Author(s): A. Dunn and S.M. Hanchet (New Zealand)

10. Methodology for automated spatial sea ice summaries in the Southern Ocean

    during historical fishing events. The distribution of local ice concentration at the time of each fishing ... Abstract:  Sea ice is recognised as a core driver of both ecosystem dynamics and fishery ... dynamics of sea ice in a target location for a specified period, and a temporal view is used to ... relationship between sea ice concentration and fishing. Although more than 85% of fishing events occurred in ...

    Meeting Document : WG-FSA-14/54 : Author(s): S.J. Parker, S.D. Hoyle, J.M. Fenaughty and A. Kohout (New Zealand)

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