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1. Mackerel icefish Champsocephalus gunnari in the diet of upper trophic level predators at South Georgia: implications for fisheries management

   important prey species for a number of upper trophic level predators, and is the target of commercial ... % of the diet by mass of gentoo penguins. The length-frequency distributions of C. gunnari indicated a ... 1993, 1996, 1999 and 2001. A recruitment index based on the contribution by mass of the 1+ age-class in ... the diet of gentoo penguins indicated a higher degree of variability in recruitment than in considered ...

   Meeting Document : WG-FSA-03/74 : Author(s): K. Reid, S. Hill and T. Diniz (United Kingdom)

2. INCORPORATING SAMPLING VARIATION AND RANDOM READER ERROR INTO CALCULATION OF EFFECTIVE SAMPLE SIZE IN THE APPLICATION OF AGE LENGTH KEYS TO ESTIMATION OF CATCH-AT-AGE PROPORTIONS

   observations that contribute to the objective function via a multinomial likelihood. The multinomial likelihood ... requires a nominal sample size for each fishery and year combination. A method is described for estimating ... Monte Carlo multinomial replicates of the observed age length key (ALK) with each ALK used to generate a ... replicate age frequency sample. For each replicate a random draw of the ageing error matrix is taken and ...

   Meeting Document : WG-SAM-09/08 : Author(s): S.G. Candy (Australia)

3. 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 ... . This included shared commitment to maintaining a healthy ecosystem and support for management of the ... agreed that current levels of fishing have a low risk of significant impacts but that there is no need to ... increase catch limits.  Participants also agreed that the objectives of management must include a healthy ...

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

4. Simulating nursery areas for Antarctic krill along the western Antarctic Peninsula with relevance for the Domain 1 MPA Planning process

   Abstract:  Antarctic krill (Euphausia superba) is a key species and a dominant grazer in the ... that conditions a successful completion of the cycle. The objective of the present study is to estimate ... along the western Antarctic Peninsula (WAP) shelf. This objective was addressed using a one-dimensional ... with temperature and density fields from a high-resolution model scaled by projections for 2030 for the ...

   Meeting Document : SC-CAMLR-XXXVI/BG/12 : Author(s): Delegations of Argentina and Chile

5. INVESTIGATING LENGTH AT MATURITY OF ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI) BASED ON SCIENTIFIC OBSERVERS’ DATA

   observers’ staging data were highlighted and GSI is recommended as a better indicator of maturity status in ... Antarctic toothfish. Reports of histological analyses of a small number of Antarctic toothfish showed ... a limited number of fish, most of which were from the southern area, therefore not on obviously ... spawning fish. Histological analysis using a hindcasting assessment of 683 samples collected in December to ...

   Meeting Document : WG-FSA-08/48 : Author(s): S. Mormede, S. Parker and P. Grimes (New Zealand)

6. Trophic study of Ross Sea Antarctic toothfish (Dissostichus mawsoni) using carbon and nitrogen stable isotopes

   indicate that, very generally, larger fish consume prey of a higher trophic level than smaller fish. There ... were substantial residual within-species variations in δ15N and δ13C. Dissostichus mawsoni exhibited a ... rostrata (2.7 ‰ range) showed a d15N range greater than 3.4 ‰ spanning more than one trophic step. This ... implies that the diet of all species sampled was variable, or that individual species were eating a ...

   Meeting Document : WG-EMM-08/27 : Author(s): S.J. Bury, M.H. Pinkerton, D.R. Thompson, S. Hanchet, J. Brown and I. Vorster (New Zealand)

7. Surface water masses, primary production, krill distribution and predator foraging in the vicinity of Elephant Island during the 1989-90 austral summer

   Abstract:  Four successive surveys of the pelagic marine environment were conducted over a 100-by ... predators. A hydrographic front, north of Elephant Island and aligned southwest-to-northeast, persisted ... of it. A second front was apparent at the eastern side of the study area and was tentatively ... mature and exhibited a general transition from reproductively active to gravid and spent individuals. A ...

   Meeting Document : WG-CEMP-90/11 : Author(s): A.F. Amos, J.L. Bengtson, O. Holm-Hansen, V.J. Loeb, M.C. Macaulay and J.H. Wormuth (USA)

8. DEFINING TAG RATES AND TACS TO OBTAIN SUITABLY PRECISE ABUNDANCE ESTIMATES FOR NEW AND EXPLORATORY FISHERIES IN THE CCAMLR CONVENTION AREA

   Abstract:  This paper outlines a method of calculating suitable tagging rates and total allowable ... catches (TACs) that would be expected to yield a pre-specified precision in a resultant abundance estimate ... . With respect to the tagging-based abundance estimator, we use the Lincoln-Petersen method and derive a ... be extremely useful in terms of defining suitable catch levels and tagging rates required to obtain a ...

   Meeting Document : WG-SAM-08/06 : Author(s): R.M. Hillary (UK)

9. An underwater setting method for surface longliners, to minimise the accidental/incidental capture of seabirds

   Abstract:  The accidental/incidental capture of seabirds by longline gear may be causing a ... . In response to the sea bird problem, the New Zealand Department of Conservation funded a programme in ... 1996 to develop a device to set baits underwater on commercial longliners. Trials on two U tube devices ... bait to the setting depth, however a backward facing U tube succeeded in flushing the bait on all ...

   Meeting Document : WG-FSA-97/53 : Author(s): Walshe, K.A.R., Parnes, P.

10. Proposal for an extension to the mark-recapture experiment to estimate toothfish population size in the South of Subarea 48.4

    Abstract:  A three‐year tagging study in the South of Subarea 48.4 was initiated in the 2008/09 ... 48.4; A total of 186 D. eleginoides and 202 D. mawsoni were tagged and released in 2010, leaving a ... total of 794 tagged fish in the water, respectively. A total of 13 D. eleginoides and 22 D. mawsoni were ... and rajids again dominated bycatch, comprising 15.4% and 1.2% of toothfish catch, respectively. A ...

    Meeting Document : WG-FSA-10/40 : Author(s): J. Roberts and D. Agnew (UK)

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