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1. Change in environmental conditions of the Southern Ocean observed by satellites and data-assimilating models between 1981 and 2019

   Abstract:  We provide a summary of environmental change in the Southern Ocean over the period of ... satellite observaton (1981 to present). The environmental data we consider are: (1) chlorophyll-a ... ) from the AVHRR series of NOAA satellites (1981–2019); (3) spatial gradient of SST (as an indicator of ... ocean fronts) from the same AVHRR observations; (4) sea ice concentration from microwave satellite ...

   Meeting Document : WG-EMM-2019/39 : Автор(ы): M. Pinkerton

2. Simulations to evaluate model performance for Antarctic toothfish stock assessment in the Amundsen Sea region

   increasing the tagging rate in the South would result in an increase in bias but no improvement in the ... Abstract:  The Amundsen Sea region (ASR) is currently managed under a research plan, which has ... shown promising results to date, with 8 interseason tags recaptured in the South area in 2016 and 12 ... (preliminary recaptures) in 2017. The aim of this paper is to ascertain when the Amundsen Sea region stock ...

   Meeting Document : WG-SAM-17/40 : Автор(ы): S. Mormede and S. Parker

3. A spatial multi-species operating model (SMOM) of krill–predator interactions in small-scale management units in the Scotia Sea

   is essentially no upper limit on the number of predator species which can be included. Given the ... Abstract:  A Spatial Multi-species Operating Model (SMOM) of the underlying krill-predator-fishery ... dynamics is developed in response to requests for scientific advice regarding the subdivision of the ... precautionary catch limit for krill among 15 small-scale management units (SSMUs) in the Scotia Sea to reduce ...

   Meeting Document : WG-EMM-06/12 : Автор(ы): É. Plagányi and D. Butterworth (South Africa)

4. Bridging the krill divide: understanding cross-sector objectives for krill fishing and conservation

   Abstract:  In June 2014, the ICED programme, the British Antarctic Survey and WWF co-hosted a two ... day workshop entitled “Understanding the objectives for krill fishing and conservation in the Scotia ... Sea and Antarctic Peninsula region” which involved participants from the science, conservation, and ... fishing industry sectors.  The workshop used structured dialogue, led by an independent facilitator, to ...

   Meeting Document : SC-CAMLR-XXXIII/BG/34 : Автор(ы): United Kingdom, Norway, Chile, ASOC and ARK

5. Advances are urgently needed in providing regular estimates of krill stock status based on the available data

   Abstract:  CCAMLR currently manages the krill fishery in subareas 48.1 to 48.4 using an arbitrary ... measure (the trigger level) which was established in 1991 and is “not related to the status of the krill ... stock”. At the same time, CCAMLR recognises that “advances are urgently needed” specifically because the ... trigger level is not related to the status of the stock. The establishing terms of reference for WG-EMM ...

   Meeting Document : WG-EMM-2019/28 : Автор(ы): S. Hill, J. Hinke, N. Ratcliffe, P. Trathan and G. Watters

6. Report of the UK Groundfish Survey at South Georgia (CCAMLR Subarea 48.3) in January/February 2019

   Abstract:  The UK undertook a bottom trawl survey of CCAMLR sub-Area 48.3 on the FV Sil between ... the 27thth January and 5th February 2019. A total of 73 random and representative hauls were completed ... in 2017, but is comparable with the long term average. The highest catches were on the moraine banks ... of the two northern strata and at the western end of Shag Rocks, with one high catch recorded in the ...

   Meeting Document : WG-FSA-2019/20 : Автор(ы): S. Gregory, P. Hollyman, T. Earl, A. Clement, J. Visagie, L. Featherstone and M. Belchier

7. Preliminary evaluation of two feedback management strategies for the krill fishery in Subareas 48.1–48.3

   Abstract:  The Scientific Committee has previously used results from the Krill-Predator-Fishery ... Model (KPFM2, also known as Foosa) to consider the risks that implementing various management strategies ... for the krill fishery will compromise the Commission’s ability to achieve the objectives in Article II ... of the Convention. Management strategies for the krill fishery are currently comprised of an overall ...

   Meeting Document : SC-CAMLR-XXXVII/BG/12 : Автор(ы): Delegation of the USA

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

   an improved outcome relative to scenarios where there was no management action, but that the ... Abstract:  An important management objective for CCAMLR in the high seas region of the Antarctic ... investigate a range of scenarios for simulating the effect and management of benthic impacts from longline ... extreme case studies to validate the underlying model and code. In general, the model simulations were ...

   Meeting Document : WG-FSA-10/29 : Автор(ы): A. Dunn, S.J. Parker and S. Mormede (New Zealand)

9. Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRU 88.2E for the years 2002–03 to 2010–11

   Abstract:  We provide an update of the Bayesian sex and age structured population stock assessment ... model for Antarctic toothfish (Dissostichus mawsoni) in the SSRU 88.2E, using revised catch, catch-at ... -age and tag-recapture data from selected trips and all vessel trips. The 2011 reference case model ... resulted in a 30% higher estimate of initial biomass than for the 2009 base case. The main reason for this ...

   Meeting Document : WG-FSA-11/44 : Автор(ы): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)

10. Exploration of CPUE standardisation variances in the Ross Sea (Subareas 88.1 and 88.2A South of 70°s) Antarctic toothfish (Dissostichus mawsoni) exploratory longline fishery

    fisheries without integrated assessments in the CPUE by seabed area method to estimate stock biomass in the ... interim of collecting sufficient tag recaptures. Here, we address the two questions: (1) which unit of ... trend and magnitude of catch rates. Using data from the Ross Sea Antarctic toothfish fishery, we ... (hooks/cluster) with Generalised Linear Models (GLMs). The model with total hook numbers was preferred ...

    Meeting Document : WG-SAM-2019/25 : Автор(ы): D. Maschette, S. Wotherspoon and P. Ziegler

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