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

   for the krill fishery will compromise the Commission’s ability to achieve the objectives in Article II ... management strategies in which the overall catch limit is dynamically redistributed among small scale ... ‑2) or (2) changes in penguin abundance. Relative to the case in which the overall catch limit is ... statically distributed among SSMUs in proportion to catches taken during 2009-2016, we found that the two ...

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

2. 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 ... -species feedback loop that is widely used in fishery management elsewhere, including in other CCAMLR ... fisheries. This feedback loop regularly modifies management measures, such as catch limits, in response to ...

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

3. Distribution, morphology, growth, reproduction, diet and trophic position of two species of grenadier (Macrourus whitsoni and M. caml) in the Ross Sea region of the Southern Ocean (CCAMLR Subareas 88.1 and 88.2)

   Macrourus whitsoni and M. caml in the Ross Sea region of the Southern Ocean. Fish were caught by New Zealand ... vessels in the fishery for Antarctic toothfish (Dissostichus mawsoni) between December 2011 and February ... 2012 from CCAMLR subareas 88.1B, 88.1C, 88.1G, 88.1H, 88.1K and 88.2H. In total, 227 M. whitsoni and ... . whitsoni examined was 65 cm TL and 1.3 kg. The two main morphological characters (number of rays in the ...

   Meeting Document : WG-FSA-12/54 Rev. 1 : Author(s): M.H. Pinkerton, P. McMillan, J. Forman, P. Marriott, P. Horn, S. Bury and J. Brown (New Zealand)

4. Uncertainty in reported geographical distribution and weight of krill catches from Norwegian krill fishing vessels operating continuous fishing systems

   ensure catch reporting in accordance with the present conservation measure (CM 21-03) and to investigate ... potential errors in historical catch report data. As a response, the Norwegian delegation presented a list ... estimate variability in the conversion from krill holding tank volumes to krill biomass indicated that a ... reported catch time and actual catch time since the krill catch is kept in holding tanks before being ...

   Meeting Document : WG-EMM-18/22 : Author(s): G. Skaret, T. Knutsen, F. Grebstad and O.A. Bergstad

5. Ecological implications of body composition and thermal capabilities in young Antarctic fur seals (Arctocephalus gazella)

   Abstract:  In comparison to other homeotherms, young recently weaned marine mammals in high ... the role of lipid stores in a high-latitude pinniped, the body composition and thermoregulatory ... post-weaning fasting capability in free-ranging, young fur seals. Resting metabolic rates were ... different for pups and yearlings measured in 0.6 ºC water, 10.3 ºC water, and ambient air; however, mass and ...

   Meeting Document : WG-EMM-04/69 : Author(s): M.R. Rutishauser, D.P. Costa, M.E. Goebel and T.M. Williams (USA)

6. Evidence to support the annual formation of growth zones in otoliths of Antarctic toothfish (Dissostichus mawsoni)

   ) have been aged assuming that one translucent zone is formed annually in the otoliths of this species ... . However, no evidence to validate this assumption has previously been presented. In the current work ... indicates that one translucent zone is formed annually in otoliths of post-mature D. mawsoni. Otoliths from ... . Zone counts were consistent within modes, and increased by one in each consecutive mode. This indicates ...

   Meeting Document : WG-FSA-02/33 : Author(s): P.L. Horn, C.P. Sutton (New Zealand) and A.L. DeVries (USA)

7. Interannual variability of the South Georgia marine ecosystem: biological and physical sources of variation in the abundance of krill

   the relative roles of biological and physical processes in generating these fluctuations are unknown ... krill (Euphausia superba) in the South Georgia area, and that the variation affects much of the ... . Fluctuations in year class success in parts, or all, of the population across the Scotia Sea, can generate ... large changes in the available biomass. The ocean transport pathways maintain the large scale ecosystem ...

   Meeting Document : WS-AREA 48-98/8 : Author(s): E.J. Murphy, J.L. Watkins, K. Reid, P.N. Trathan, I. Everson, J.P. Croxall, J. Priddle, M.A. Brandon, A.S. Brierley (UK) and E. Hofman (USA)

8. DNA barcoding highlights a cryptic species of grenadier (genus Macrourus) in the Southern Ocean

   recognized in the Southern Ocean and one in cold temperate to Arctic waters in the North Atlantic Ocean. DNA ... four well supported clades among the three Southern Ocean species. Additional specimens collected in ... , based on a Restriction Fragment Length Polymorphism (RFLP) test. Three characters counted/scored in the ... divergence or slow nucleotide substitution at COI in this genus. Author(s):  P.J. Smith (New Zealand), D ...

   Meeting Document : WG-FSA-10/33 : Author(s): P.J. Smith (New Zealand), D. Steinke (Canada), P.J. McMillan, A.L. Stewart, S.M. McVeagh (New Zealand), J.M. Diaz De Astarloa (Argentina), D. Welsford and R.D Ward (Australia)

9. Connectivity and population structure in Pleuragramma antarcticum along the west Antarctic Peninsula

   Abstract:  We asked whether silverfish (Pleuragramma antarcticum) are distributed in independent ... , reduction in sea-ice along the WAP may lead to extinction of local populations through drastic mortality of ... in areas subsidized by migration may be more robust to declining sea ice coverage. We provide ... simulations using a circulation model. Differences in length distributions and maturity suggested two discrete ...

   Meeting Document : WG-FSA-10/16 : Author(s): J. Ashford, J. Ferguson, A. Piñones, J. Torres and W. Fraser

10. A review of by-catch in CCAMLR exploratory toothfish fisheries

    thorough and effective management of Southern Ocean toothfish fisheries, especially in eliminating ... caught as bycatch annually.  Fish bycatch mitigation controls in toothfish fisheries have seen a ... thoroughly investigated. This study explores trends in fish bycatch of exploratory fisheries for toothfish ... measures.  We found a significant reduction in bycatch landings by weight and number of individuals across ...

    Meeting Document : WG-FSA-14/16 : Author(s): E. McClure, K. Reid (Secretariat)

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