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1. Diet and trophic niche of Macrourus spp. (Gadiformes, Macrouridae) in the Ross Sea region of the Southern Ocean

   . Overall, amphipods were the dominant prey found in Macrourus spp. stomachs with an index of relative prey ... carnivorous. Other important prey were copepods (especially for fish with total length less than 30 cm), krill ... opisthopterus). Minor prey found in stomachs included isopods, mysids, salps and polychaetes, with rocks and ... ) were generally consistent with stomach contents. Carbon isotope results (δ13C =-24.7±0.8‰) were ...

   Meeting Document : WG-EMM-12/P03 : Autor(es): M.H. Pinkerton, J. Forman, D.W. Stevens, S.J. Bury and J. Brown

2. Impacts of rising sea temperature on krill increase risks for predators in the Scotia Sea

   effects of ocean warming on krill biomass were strongest in the northern Scotia Sea, with a ≥ 40% decline ... below an established depletion threshold (75% of its unimpacted level), with consequent risks for some ... unimpacted level, with up to a 50% chance of falling below the depletion threshold. Simulated krill fishing ... offset the increased risks associated with ocean warming in our model to some extent. These results ...

   Meeting Document : WG-EMM-18/P02 : Autor(es): E.S. Klein, S.L. Hill, J.T. Hinke, T. Phillips and G.M. Watters

3. A preliminary model-based approach for estimating natural mortality of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region

   single value for males and females combined, with a uniform prior within the base model used in 2017 for ... Antarctic toothfish in the Ross Sea region. The model MCMCs estimated M =0.11 y-1 (0.09–0.13 y-1) with B0 ... mortality was lower and estimated the precautionary yield higher (3419 t compared with 3258 t). MPD ... estimated with relatively high precision and with no bias. Further investigations will need to be carried ...

   Meeting Document : WG-SAM-2019/04 : Autor(es): B. Moore, S. Mormede, S. Parker and A. Dunn

4. Marine debris, entanglements and hydrocarbon soiling at Bird Island and King Edward Point, South Georgia, Signy Island, South Orkneys and Goudier Island, Antarctic Peninsula 2018/19

   gazella) were observed at Bird Island and two at King Edward Point with no marine mammal entanglements ... with seabird colonies at Bird Island, most commonly in association with wandering albatrosses (35 items ... ; 43 %). One incidence of an entangled wandering albatross (Diomedia exulans) was reported; a bird with ... entanglements was below the long-term mean at all sites surveyed. Debris associated with seabird colonies was ...

   Meeting Document : SC-CAMLR-38/BG/28 : Autor(es): Delegation of the United Kingdom

5. Bioregionalisation and spatial ecosystem processes in the Ross Sea region

   Spatial Ecosystem Processes international expert workshop, tasked with assembling and analysing available ... spatial management design, consistent with CCAMLR endorsed methods. The workshop met for five days and was ... attended by twenty-one international experts with a range of relevant expertise. Analytical methods were as ... validated with reference to expert knowledge and spatial biological data, with additional expert ...

   Meeting Document : WG-EMM-10/30 : Autor(es): B.R. Sharp, S.J. Parker, M.H. Pinkerton (New Zealand) (lead authors) also B.B. Breen, V. Cummings, A. Dunn (New Zealand), S.M. Grant (United Kingdom), S.M. Hanchet, H.J.R. Keys (New Zealand), S.J. Lockhart (USA), P. O’B. Lyver, R.L. O’Driscoll, M.J.M. Williams, P.R. Wilson (New Zealand)

6. Descriptive analysis of acoustic data collected during the 2003 exploratory fishery for toothfish in the Ross Sea

   recordings could be compared with longline catches. Data quality was generally good. Of the 84 line ... recordings, 68 were considered suitable for acoustic analysis. Poor data quality was associated with strong ... issues with data quality were interference from another echosounder, and the occurrence of a double ... deadzone would be over 50 m high for a sea-bed with a slope of 20º. The problem of the acoustic deadzone ...

   Meeting Document : WG-FSA-03/28 : Autor(es): R.L. O’Driscoll and G.J. Macaulay (New Zealand)

7. A single-area stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea for the 2004/05 season

   ). A range of model sensitivities were examined, with the base case assuming the Ross Sea fishery as a ... single homogeneous area (single-area) with catch removals from three spatially based fisheries (shelf ... , slope, and north). Model fits to the data were adequate, with the tag-release and recapture data ... parameters. However, multi-chain comparisons and sensitivities with fixed selectivity ogives suggested that ...

   Meeting Document : WG-FSA-05/33 : Autor(es): A. Dunn, D.J. Gilbert and S.M. Hanchet (New Zealand)

8. An illustrative management procedure for exploring dynamic feedback in krill catch limit allocations among small-scale management units

   which simulates the “true” dynamics of the resource with tests across a wide range of scenarios for the ... here have a feedback structure, and hence are able to react and self-correct. It is important, as with ... subdivide the krill catch between SSMUs. Different MPs are then simulation tested with their performances ... average krill catches per SSMU associated with each MP. The key assumption made here is that data will be ...

   Meeting Document : WG-EMM-06/28 : Autor(es): É. Plagányi and D. Butterworth (South Africa)

9. RESOURCES EVALUATION OF ANTARCTIC KRILL EUPHAUSIA SUPERBA DANA USING AREAL TRAWLING AND HYDRO-ACOUSTIC DATA

   provided with probability methods and spatial analyses requiring knowledge of statistical distribution ... analyses procedures applied for trawling and hydro-acoustic sampling have to in compliance with the rules ... . Traditional concepts of observation system concerning the resources of krill should be further developed with ... applications of rules and parameters dealing with statistical distributions of population density, information ...

   Meeting Document : WG-SAM-08/P01 : Autor(es): L.A. Kovalchuk (Ukraine)

10. Uncertainty in acoustic surveys of Antarctic krill

    acoustic surveys. The variance in system calibration with a standard sphere was evaluated in relation to ... different standard spheres with the results of a calibration by self-reciprocity (Demer and Hewitt ... with a standard sphere were estimated as-1.2 dB and ±0.3 dB, respectively. Uncertainty in estimating ... higher than those calculated disregarding biases due to DVM, with a standard deviation of 0.6 dB ...

    Meeting Document : WG-EMM-95/72 : Autor(es): Demer, D.A.

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