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1. Net-based verification of acoustic techniques used to identify Antarctic krill

   ' using an SDWBA-derived range for Sv120-3, (iii) '2 freq 2-16'- with an Sv120-38 range ... of 2-16 dB and (iv) '2 freq 2-12'-with an Sv120-38 range of 2-12 dB The '3 freq model ... orientation distributions for the two cruises were estimated with the SDWBA model, with cruise specific ... orientation distributions applied the performance of the '3 freq model' was comparable with the two ...

   Meeting Document : SG-ASAM-09/04 : Autor(es): J. Watkins and S. Fielding (United Kingdom)

2. Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast

   fisheries of the patagonian toothfish Dissostichus eleginoides related with the selectivity of the type and ... . The size frequency of the population collected with straight hooks No3 and 4 are not significatively ... different, being No 3 near 31 % more efficient than No 4. Different bait do not present significative ... as the number of the straight hook increases (for example from 4 to 3) or when they change from ...

   Meeting Document : WG-FSA-91/11 : Autor(es): C.A. Moreno (Chile)

3. Population status of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica, based on photo-identification studies

   175 there annually. Despite high turnover of different whales between years, we used a Bayesian mark ... -recapture approach to identify a seasonal ‘resident’ population with an average annual abundance of 55 ... individuals (95% probability = 44-68) that exhibited strong inter- and intra-annual site fidelity, with ... individuals resighted over 2-14 years. Contrary to recent reports that commercial overfishing of Antarctic ...

   Meeting Document : WG-EMM-16/50 : Autor(es): R. Pitman, H. Fearnbach and J.W. Durban

4. Estimation of tag-loss rates for tagged fish in the Patagonian toothfish (Dissostichus eleginoides) fisheries at Heard Island and McDonald Islands in Division 58.5.2

   fishery, 99.3% of all double-tagged fish retain at least one tag after one year, and 80.2% after ten years ... , with longline-caught and recaptured fish losing their tags quicker than trawl-caught and recaptured ... fish. With an initial tag-loss proportion of 2.8% and ongoing tag-loss rate of 0.056 in the longline ... at liberty of 6 years, as l = 0.014 for longline and l = 0.007 for trawl. However, this single tag ...

   Meeting Document : WG-FSA-17/21 : Autor(es): P. Ziegler

5. Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia

   (Euphausia superba) was the main prey in 17 out of 22 years. Amphipods (Themisto gaudichaudii) were the main ... frequency occurrence of T. gaudichaudii both increased with a decreasing proportion of E. superba in the ... gross energy content of individual meals was often above average in years when the diets contained fewer ... euphausiids, but fledging mass was always below average in these years. Although macaroni penguins are able to ...

   Meeting Document : WG-EMM-12/17 : Autor(es): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)

6. Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts

   methods. Our investigation shows how fishery operated by years and month in each SSMUs with special ... Abstract:  In previous years we revealed that period 2006-2011 is characterized by the highest ... values of standardized CPUE indices in the Subarea 48.1 for the last 25 years. We continue to investigate ... method. We obtained the additional evidence that ‘high CPUE’ regime’ in 2006-2011 is not associated with ...

   Meeting Document : WG-EMM-14/21 : Autor(es): S. Kasatkina and P. Gasyukov (Russia)

7. Results of the sixth Ross Sea shelf survey to monitor abundance of sub-adult Antarctic toothfish in the southern Ross Sea, January 2017

   appears in 2012 progressing through each year, with the appearance of a second strong cohort in 2015. The ... predators: Terra Nova Bay in 2017, with McMurdo Sound surveyed in 2016. The estimated relative biomass index ... decline in relative biomass during the survey time series is consistent with the decline in abundance of ... population in 2015, with a subsequent increase in biomass in 2016 and 2017. These results suggest the surveys ...

   Meeting Document : WG-SAM-17/01 : Autor(es): K. Large, L. Robinson and S. Parker

8. SO-AntEco: Contributing information and scientific advice on benthic biodiversity in the South Orkney Islands (Domain 1) region

   with an international team of scientists from the Scientific Committee for Antarctic Research (SCAR ... . The expedition took place on board the BAS research ship RRS James Clark Ross in early 2016. The focus ... , 2014). The benthic assemblages of the SOISS MPA region were found to be strongly correlated with ... substrate, where hard substrates hosted a greater number of individuals, taxa and biomass with a dominance ...

   Meeting Document : WG-EMM-17/37 : Autor(es): M.J. Brasier, S.M. Grant, P.N. Trathan, L. Allcock, O.S. Ashford, H. Blagbrough, A. Brandt, B. Danis, R. Downey, M. Eléaume, P. Enderlein, C. Ghiglione, O. Hogg, K. Linse, M. Mackenzie, C. Moreau, L. Robinson, E. Rodríguez, V. Spiridonov, A. Tate, M. Taylor, C. Waller, H. Wiklund and H.J. Griffiths

9. Coincidence between climate fluctuations and variability in the Antarctic krill (Euphausia superba) recruitment

   Drake Passage and krill recruitment variabiIlty. Years of high pressure gradients coincided with the ... years of good krill recruitment, and vice versa. Author(s):  Sasai, Y., Kutsuwada, K., Naganobu, M ...

   Meeting Document : WG-EMM-95/53 : Autor(es): Sasai, Y., Kutsuwada, K., Naganobu, M.

10. Preliminary assessment of Dissostichus eleginoides on the Heard Island Plateau (Division 58.5.2) based on a survey in May 2002

    classes (ages 2 and 3) are likely to be much weaker than the current juvenile year classes (ages 4 to 8 ... of recruitment being increased for some recent years. An assessment of the trend in illegal catches ... results for 2001. The pooled length-density distribution for the 2002 survey shows that the younger year ...

    Meeting Document : WG-FSA-02/70 : Autor(es): A.J. Constable, R. Williams and T. Lamb (Australia)

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