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1. Preliminary assessment of the South Georgia toothfish stock, 2007

   higher than was estimated last year. 2. Improvements are made to the fit of tag data through (a ... estimates of catches at age from 1998 to 2006 (based on random sampling of the catch for age determination ... ). Fits of all data (CPUE; catches at length for the early fishery; catches at age for the later fishery ... estimates year class strength which corresponds, in some years, with estimates made from the South Georgia ...

   Meeting Document : WG-FSA-07/29 : Autor(es): D.J. Agnew, R. Hillary and J. Pearce (United Kingdom)

2. On the examining of krill flux

   ) in the choosen polygones, the proves of active long-distance migrations of krill are considered ... Abstract:  In connection with future calculation of volume of krill immigration/emigration (flux ... results of calculations, is the valuation of krill retention time. To make it more correct and natural it ... is necessary to take into account the biological characteristics of krill, especially for the regions ...

   Meeting Document : WG-EMM-95/19 : Autor(es): Makarov, R.

3. Stock assessment of the Patagonian toothfish (Dissostichus eleginoides) at South Georgia

   eleginoides, in the vicinity of Shag Rocks, South Georgia. Assessment of this stock is not possible by ... conventional methods because the bulk of the adult population may be dispersed over a wide area in deep water ... whereas the Shag Rocks’ shelf may be a nursery ground for juveniles. An assessment of the stock has been ... stock. Author(s):  I. Everson (United Kingdom) Title:  Stock assessment of the Patagonian toothfish ...

   Meeting Document : WG-FSA-91/20 : Autor(es): I. Everson (United Kingdom)

4. A simple approach for calculating the potential yield of krill from biomass survey results

   Paper Title:  A simple approach for calculating the potential yield of krill from biomass survey ... results Abstract / Description:  Estimates are calculated for the parameter λ in the yield equation Y = λ ... MB 0 for a krill fishery in which both the fishery and krill growth are seasonal. The criterion used ... for the calculations is that the probability that the krill spawning biomass drops below 20% of its ... along these lines. 2. METHODS The mathematical detail of the calculations carried out is given in ... of zero growth. Much of the fishing of krill off Antarctica is concentrated in the three summer ... estimate Bo which is to be used in equation (1) is considered to be made in the middle of the season (Le ... (survey sampling) estimation error has been made in this analysis [the 11 term in equation (A.9) of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Autor(es): Butterworth, D.S., A.E. Punt and M. Basson

5. Preliminary assessment of Subarea 48.3 mackerel icefish, Champsocephalus gunnari, based on the January 2013 survey

   Abstract:  A bootstrap procedure was applied to estimate the demersal biomass of mackerel icefish ... (Champsocephalus gunnari) in CCAMLR subarea 48.3 using data from the UK trawl survey conducted in January 2013. The ... fishing season. Application of the CCAMLR rule, which ensures 75% biomass escapement after a two year ... CCAMLR harvest control rule was then applied to determine catch limits for the 2013/14 and 2014/15 ...

   Meeting Document : WG-FSA-13/27 : Autor(es): C. Darby and T. Earl (United Kingdom)

6. Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3

   opening (and, thus, swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl ... compared to values obtained from a previous equation. The resulting difference in biomass estimates is of ... Paper Title:  Performance and geometry of the FP-120 trawl used during UK fish stock assessment ... presented. Regression equations for the estimation of horizontal opening from other, more easily measured ... , swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl used during the ... compared to values obtained from a previous equation. The resulting difference in biomass estimates is of ... in January/February 1991, January 1992 and January 1994. Previous estimation of the horizontal net ... , 1991; Enerhaug and Karlsen, in press). Engiis and Goda (1986) showed that several aspects of the ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Autor(es): Pilling, G. and G. Parkes

7. Methods of age determination for mackerel icefish (Champsocephalus gunnari Lönnberg 1905) from the South Georgia Island shelf

   1905) from the South Georgia Island shelf Abstract / Description:  Radii of annual elements of otoliths ... of mackerel icefish (Champsocephalus gunnari) from the South Georgia shelf were determined by ... analyzing data on length frequency distribution of fish in catches simultaneously with otolith radii of fish ... taken in the period July to September. The latter was done using specimens from strictly defined age ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 37–49 : Autor(es): Frolkina, Zh.A.

8. The utilization of seabird censuses for krill monitoring

   :  The possibility of using bird observations made at sea as a means of monitoring krill in the Antarctic ... Paper Title:  The utilization of seabird censuses for krill monitoring Abstract / Description ... capable of detecting changes in bird abundance and/or species composition, associated with three levels of ... krill abundance. A vector close to multi-normality was obtained, thus suggesting that refinements of the ... mean vector of the group. This technique, fully detailed in Morrison (1977), allows the construction ... possibility of using bird observations made at sea as a means of monitoring krill in the Antarctic ocean is ... changes in the Antarctic ecosystem will first appear as changes in biological parameters of the species ... in time the advice needed by the Commission and calls for indirect measures of krill population ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Autor(es): Marschoff, E.R., J.G. Visbeek and L.R. Fontana

9. Note on relationship between the Antarctic krill and annual variation of ice edge during 1979 to 1992

   the sea ice in the sea area around the South Shetland Islands are described. Mean size of krill near ... Abstract:  During 1979 to 1991, relationship between the size of Antarctic krill and the extent of ... the coastal zone appeared to be small in summer season just after a strong ice extent had occurred ... . This implies that strong recruitment of small size krill had occurred just after the season with the ...

   Meeting Document : WG-KRILL-93/26 : Autor(es): M. Naganobu and S. Kawaguchi (Japan)

10. A simple approach for calculating the potential yield of krill from biomass survey results

    Abstract:  Estimates are calculated for the parameter λ in the yield equation Y = λ M B0 for a ... kri11 fishery in which both the fishery and kri11 growth are seasonal. The criterion used for the ... calculations is that the probability that the kri11 spawning biomass drops below 20% of its average pre ... -exploitation level over a 20 year period of harvesting should not exceed l0%. The value of λ depends strongly ...

    Meeting Document : WG-KRILL-91/24 : Autor(es): D.S. Butterworth (South Africa) and M. Basson (United Kingdom)

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