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1. Estimates of local biomass, including estimates of uncertainty, for Antarctic (Dissostichus mawsoni) and Patagonian (Dissostichus eleginoides) toothfish in research blocks in Subareas 48.2, 48.6, 58.4 and 88.3

   Abstract:  This paper includes updated local biomass estimates of toothfish populations with ... at WG-SAM-16 with revisions to the CPUE-by-seabed area parameter values agreed at WG-SAM-17. The ... higher CPUE-by-seabed area estimates has also resulted in a greater overlap in confidence intervals with ...

   Meeting Document : WG-FSA-17/42 : Author(s): CCAMLR Secretariat

2. Comparing two and three frequency dB window identification techniques for estimating Antarctic krill density

   model. A Bland-Altman analysis with a pre-set nominal cut-off of ≤5 gm-2 bias between methods identified ... that only the 120-70 kHz (S v120-70) identification window was comparable with the regularly used 120 ... ) identification window was comparable with the regularly used 120-38 and 200-120 kHz  (S v120-38 & S v200-120 ...

   Meeting Document : SG-ASAM-18/01 : Author(s): S. Fielding

3. CCAMLR Satellite Overwatch Report (Decision of the Thirty-seventh Meeting of the Commission, paragraph 3.8)

   geographical position which were provided to the CCAMLR Secretariat for comparison with CCAMLR VMS data. The ... Secretariat was provided with 44 operable images, which corresponded with two CCAMLR authorised vessels. Part ...

   Meeting Document : CCAMLR-38/BG/06 : Author(s): Delegation of France and CCAMLR Secretariat

4. Circumpolar connections between Antarctic krill (Euphausia superba Dana) populations: Investigating the roles of ocean and sea ice transport

   in the Southern Ocean. Krill have a close association with sea ice which provides access to a ... . Here we present Lagrangian modelling studies at the circumpolar scale that include interaction with sea ... Modelling (OCCAM) project model together with satellite-derived sea ice motion vectors to examine the ... interaction with sea ice is important in determining the large-scale distribution of krill and its associated ...

   Meeting Document : WG-EMM-07/P10 : Author(s): S.E. Thorpe, E.J. Murphy and J.L. Watkins (United Kingdom)

5. Effects of variability in prey abundance on reproduction and foraging in chinstrap penguins (Pygoscelis antarctica)

   contend with large interannual fluctuations in prey availability and hence the cost of chick provisioning ... . Adults faced with this uncertainty can mechanistically balance parental care by adopting a strategy ... , 1991 and 1992, respectively) and was correlated with annual measures of breeding adult body weight and ... in response to decreases in prey abundance in a manner consistent with predictions of life-history ...

   Meeting Document : WG-EMM-06/P6 : Author(s): D.A. Croll, D.A. Demer, R.P. Hewitt, J.K. Jansen, M.E. Goebel and B.R. Tershy (USA)

6. Zooplankton target strength: volumetric or areal dependence?

   kHz and I MHz data were collected with a dual-beam sonar system and the 200 kHz data with a split-beam ... system. Experiments were conducted with live, tethered individuals in an enclosure filled with filtered ...

   Meeting Document : WG-Krill-94/13 : Author(s): D.A. Demer and L.V. Martin (USA)

7. Unusual breeding by seabirds at Marion Island during 1997/98

   species with an intermediate foraging range that eat mainly crustaceans, macaroni Eudyptes chrysolophus ... chicks of rockhopper penguins fledged with a slightly heavier mass than in other years. However, for both ... /99) breeding season. The unusual breeding by most of the seabirds coincided with the El Niño Southern ... Oscillation (ENSO) event of 1997/98. This synchrony contrasts with lagged responses to ENSO events of seabirds ...

   Meeting Document : WG-EMM-03/13 : Author(s): R.J.M. Crawford, C.M. Duncombe Rae, D.C. Nel and J. Cooper (South Africa)

8. 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

   accounts for both the variation associated with sub-sampling of the random length frequency (LF) sample for ... Monte Carlo multinomial replicates of the observed age length key (ALK) with each ALK used to generate a ... % to 10%. When random ageing error was combined with sampling error the corresponding values were lower ... , with a corresponding range of around 4 down to 1. This reduction is due to the way the ageing error ...

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

9. The biology and ecology of mackerel icefish, Champsocephalus gunnari – an Antarctic fish species that lack haemoglobin

   exploited since the beginning of the 1970's with reported annual catches exceeding 50- 100 000 tomes in ... some years. Champsocephalus gunnari has many characteristics typical of Antarctic fish species with ... ability to reproduce at an early age coupled with a comparatively high fecundity and growth performance ... capacity to rebuild than species with the slower reproductive rates common in other notothenioids. Author(s ...

   Meeting Document : WG-FSA-96/24 : Author(s): Everson, I., Kock, K.-H.

10. Swarm characteristics of Antarctic krill Euphausia superba relative to the proximity of land during summer in the Scotia Sea

    swarms identified with a Simrad EK60 (38 kHz, 120 kHz) echosounder were grouped into 4 categories ... -sectional areas of swarms were significantly larger inshore, with a mean value of 120 m 2 in the 0 to 50 km ... was also significantly greater, with an average density of 95 ind. M–3 compared to between 24 and 31 ... , dense swarms throughout the survey area, and this trend increased with decreasing distance from shore ...

    Meeting Document : WG-EMM-10/P09 : Author(s): T. Klevjer, G.A. Tarling and S. Fielding

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