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1. A study of UK and Russian surveys using acoustics to augment trawling methods in shelf waters off South Georgia (Subarea 48.3)

   Abstract:  In 2001/2002 Russian and UK vessels undertook surveys for icefish at South Georgia ... acoustic surveys indicated that icefish were not only located near to the seabed, but that a significant ... estimates are ~ 1.5 times greater This should be taken into account in the forthcoming stock assessment ... during WG-FSA–2002. These results show that the current observation system for the collection of data for ...

   Meeting Document : WG-FSA-02/56 : Autor(es): S. Kasatkina, P. Gasyukov (Russia), C. Goss, I. Everson, M. Belchier, T. Marlow, A. North and M. Collins (United Kingdom)

2. The effects of global climate variability in pup production of Antarctic fur seals

   Abstract:  Climate variability has strong effects on marine ecosystems, with repercussions that ... . Nonlinear mixed effects models indicated that positive anomalies at South Georgia explained extreme ... range in scale from those that impact individuals to those that impact the entire food web. Climate ... sea surface temperature (SST). Environmental autocorrelation at South Georgia was evident with ...

   Meeting Document : WG-EMM-06/P2 : Autor(es): J. Forcada, P.N. Trathan, K. Reid and E.J. Murphy (United Kingdom)

3. Depth distribution and spawning pattern of Dissostichus eleginoides over the winter period in Subarea 48.3

   with movement of animals to preferred spawning depths. A general model would be that toothfish form ... high mean length at depth are May and August, and with a low mean length at depth are April and July ... . Examination of maturity data suggests that in addition to a major spawning event in late July/August, there ... spawning between the two areas. There may be two (or more) spawning periods during the winter, with the ...

   Meeting Document : WG-FSA-98/58 : Autor(es): D.J. Agnew, K. Kerkieta, L. Heaps, C. Jones, J. Pearce and A. Watson (United Kingdom)

4. Numerical model of ecosystem including Euphausia superba Dana as a key species in circumpolar region

   OGCM (Ocean General Circulation Model) (2) to develop a one dimensional ecosystem model that can be ... ) with seven compartments and coupled with a one dimensional mixed layer model for calculating the ... Abstract:  On the processes to investigate a proper model for understanding the processes that ... integrated model with the above 5 items. This year, we have developed an OGCM and a one dimensional ecosystem ...

   Meeting Document : WG-Krill-94/26 : Autor(es): M.J. Kishi and M. Naganobu (Japan)

5. On the taxonomy of the Lepidonotothen squamifrons group (Pisces, Perciformes, Notothenioidei)

   macrophthalma, may also be identical with L squamifrons and that the L squamifrons 'group' is ... Islands to assist in clarifying their taxonomic status. Results suggest that both 'species&#039 ... Abstract:  The Lepidonotothen squamifrons group has been described to be comprised of 3 species: L ... ; represent only populations of one species. Evidence is presented that the third species of the group, L ...

   Meeting Document : WG-FSA-93/25 : Autor(es): R. Schneppenheim and K.-H. Kock (Germany), G. Duhamel (France) and G. Janssen (Germany)

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

   estimated to be 92 140 t (70 330–121 950 t); a higher B0 72 620 t (65 040–81 050 t) when compared to the ... 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 ... mortality can be achieved using MCMC simulations. We recommend that analyses exploring the effect of the ...

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

7. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2004/05

   eight years in Subarea 88.1 and for four years in Subarea 88.2 with a large amount of data collected on ... toothfish and the associated bycatch. The 2005 D. mawsoni catch was the highest on record with a total of ... 3477 t against a catch limit of 3625 t. The catch limit was almost reached in Subarea 88.1 and exceeded ... total catch1. Comparison of the location of fishing effort with ice distribution over the past six years ...

   Meeting Document : WG-FSA-05/29 : Autor(es): S.M. Hanchet, M.L. Stevenson, N.L. Phillips and A. Dunn (New Zealand)

8. Interannual variability in Antarctic krill (Euphausia superba) density at South Georgia, Southern Ocean: 1997 – 2013

   , 2001-2003, 2005-2007) of high values (µ > 30 g m-2) interspersed with years (1999-2000, 2004, 2009 ... targets were identified in acoustic data using the approved CCAMLR protocol, that is using a multi ... g m-2) and its distribution was highly skewed with many zero observations. Within each survey the ... mean krill density was significantly correlated with the top 7% of the maximum krill densities observed ...

   Meeting Document : WG-EMM-14/P04 : Autor(es): S. Fielding, J. Watkins, P. Trathan et al.

9. Standardised CPUE analysis of Antarctic toothfish (Dissostichus mawsoni) fishery in the Ross Sea for the years 1997/98 to 2004/05

   addition to extreme ice conditions that limited where lines could be set. None of these factors were ... years in Subarea 88.1 and 88.2. This report revises and updates the previous analysis with the addition ... on (a) all vessels and (b) the two main New Zealand vessels that have been in the fishery over most ... of the period. We estimate indices using both lognormal generalised linear models and a Tweedie mixed ...

   Meeting Document : WG-FSA-05/32 : Autor(es): A. Dunn and N.L. Phillips (New Zealand)

10. A single-area stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in SSRU 88.2E for the 2004/05 season

    . Moreover, the mean catch that could actually be taken under this scenario was 450 t. Hence, two revised ... be the same as used for the Antarctic toothfish in the Ross Sea (see Dunn et al. 2005b), except that ... uncertain, with the median estimated as 7720 t (95% credible intervals 3760–22 240 t), and current (B2005 ... , were estimated to be 670 t. However, as the fishing selectivity was estimated to be to the right of the ...

    Meeting Document : WG-FSA-05/31 : Autor(es): A. Dunn, D.J. Gilbert and S.M. Hanchet (New Zealand)

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