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1. Long-term monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)

   for the Elephant Island area with regard to the representativeness of the study area (60°-62 o 30´S ... and 53 o-57 o 30´W) for proportional recruit and density indices. Proportional recruitment indices ... one- and two-year-old krill (R 1 and R 2 respectively). Statistically significant fluctuations in ... interannual variability of krill recruitment is confirmed by the present analysis. Results are compared for ... the study area after 13 days, but was then trapped in an eddy system for another 30 days before ... density may vary by nearly two orders of magnitude and that the effects can persist for several years ... analysis. Results are compared for one- and two-year-old ]years (year taken as factor). l This probability level is based on normal theory and is ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 19–35 : Autor(es): Siegel, V., W. de la Mare and V. Loeb

2. Chilean krill fishery: analysis of the 1991 season

   paper summarises Chilean catch data for 1991. Special emphasis is given to the analysis of haul-by-haul ... idea on the spatial structure of the hauls. The results show that the autocorrelation function for ... was fished for two days (21 to 275 23 February) yielding 260 tonnes (CPUE = 12.9 tonnes hr -1 ... °S, 59°13'W. This patch was fished for another two days yielding 264 tonnes (CPUE = 9.3 tonnes hr -1 ... these two areas. Fishing season lasted 34 days. Thus for a given season, both areas would be treated as ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 273–287 : Autor(es): Marín, V.H., A. Mujica and P. Eberhard

3. Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic

   eleginoides) was investigated in two offshore regions in the southwestern Atlantic: on the Argentinian ... °-45°W. The South Georgia area was divided into two zones: the shelf zone and deep-water zone. On the ... continental shelf/slope between 46°-55°S and 60°-64°W, and around South Georgia between 53°-55°30' and 3 ... Argentinian continental shelf/slope, the length of D. eleginoides ranged from 30 to 95 cm total length (TL ... investigated in two offshore regions in the southwestern Atlantic: on the Argentinian continental shelf/slope ... Georgia area was divided into two zones: the shelf zone and deep-water zone. On the Argentinian ... main line of 20 000 m, with branch lines each with 90 hooks (model 'Ancora', 30 mm gap) spaced at 1 m ... conducted on the Argentinian continental shelf/slope, between 37"20' and 55"s. The highest concentration ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Autor(es): García de la Rosa, S.B., F. Sánchez and D. Figueroa

4. Investigation of bias in the mark–recapture estimate of toothfish population size at South Georgia

   uneven distribution of tag placements and recapture effort, on bias in the Petersen estimator of ... an average movement rate downwards when fish entered a high-density box (as indicated by high CPUE ... allows simulation of releases by box over multiple years. The model performed as expected with test ... situations. It produced a near-perfect estimate of stock size when there was an ideal distribution of tags ... correctly capture movement reversals – where an animal moves west one year and back east the next, for ... calculated for those two years. results Model behaviour The model was subjected to a number of tests to ... of toothfish typically move only 20–30 km each year (Marlow et al., 2003). This paper investigates ... number of tagged fish alive and available for capture in box k in year t. Two alternative methods were ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 47–63 : Autor(es): Agnew, D.J., G.P. Kirkwood, J. Pearce and J. Clark

5. Selectivity of commercial and research trawls in relation to krill

   RT 72/308 and an Isaacs-Kidd midwater research trawl (IKMT). The commercial trawl catches contained ... more large krill (35-58 mm) than catches of the research trawl (30-54 mm). The maximum difference in ... research trawl. The two types of trawl have different catchability characteristics: the research trawl is ... better at retaining small krill, while the opposite is true for the commercial trawl. Consequently ... CCAMLR's Working Group on Krill (WG-Krill) (35-58 mm) than the IKMT trawl (30-54 mm) (see for an operating ... ~rika), and an RT 72/308 commercial trawl (RV Augus). Trawling duration was 30 minutes and trawhg ... results obtained for hauls made on the same krill aggregation were used for comparative analysis. Three ... expressed towards Yu. V. Kadilnikov for his assistance in preparing this article. REFERENCES Greene ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 161–169 : Autor(es): Kasatkina, S.M

6. A functional division of Electrona carlsbergi (Tåning, 1932) area of habitat in relation to the latitudinal zonation of the Southern Ocean

   Southern Atlantic along two meridional transects at 17° and 20°W in the latitudes from 37°30' to 55°30 ... carlsbergi and also on searching for possible spawning areas of the species. During the survey the following ... the RV Vozrozhdenie (VNIRO, USSR) in March/April 1990 an integrated study survey was conducted in the ... 'S. The survey was mainly focussed on studies of distribution of adult and pre-spawning Electrona ... March/April 1990 an integrated study survey was conducted in the Southern Atlantic along two meridional ... transects at 17° and 200W in the latitudes from 37°30' to 55°30'S. The survey was mainly focussed on ... studies of distribution of adult and pre-spawning Electrona carlsbergi and also on searching for possibl ... fishing grounds and target species in recent years has opened up great opportunities for exploiting ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 369–395 : Autor(es): Zemsky, A.V. and S.A. Zozulya

7. A review of the diet and at-sea distribution of penguins breeding within the CAMLR Convention Area (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   in an ecologically sensitive manner demands that catches do not depress stocks within the foraging ... . These models require information on the number of predators in a population, their nutritional demands ... published information on the diet and at-sea distribution of the six penguin species that breed in the CAMLR ... comparative information for their own findings and by highlighting significant gaps in existing knowledge and ... methods for studying the diet and at-sea distribution of penguins and a commentary on the uncertainties ... powerful method for identification of prey types, but can only provide information on percentage ... N15 gives an indication of the trophic level at which an animal feeds, while δC13 indi- cates primary ... studies of penguin diet only last one or two years, which will fail to fully capture annual variability ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 75–114 : Autor(es): Ratcliffe, N. and P. Trathan

8. Age determination of Notothenia gibberifrons from the South Shetland Islands, Antarctic Peninsula subarea (Subarea 48.1)

   , Antarctic Peninsula subarea (Subarea 48.1) Abstract / Description:  ge determination was carried out on ... Notothenia gibberifrons specimens collected at two localities near the South Shetland Islands (Low I. and ... most reliable method. Mean length data at age presented here for Low I. specimens were compared with ... previously for specimens of South Bay, Palmer Archipelago. Possible reasons for these differences are ... . was of 38 cm while the rest were below 35.5 cm). Data compiled for the last 13 years on length ... Abstract Age determination was carried out on Notothenia gibberifrons specimens collected at two ... al. (1985) compiled data from different sources on mean total length and mean total weight for each ... Georgia area, the reported data on age determination are well comparable in age groups up to 9 years ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 143-160 : Autor(es): Barrera-Oro, E.

9. Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation

   for the body shape parameterisation can give a high source of uncertainty, and there is an urgent need ... TS of Antarctic krill (Euphausia superba) for use in the acoustic echo-integration method. In this ... study, the SDWBA TS pattern and frequency response behaviours at standard survey frequencies and animal ... the distribution of animal orientations. Due to the high variability of TS to realistic changes in ... rigorously if the scattering as a function of size and frequency for an individual (i.e. target strength ... relationship for the body shape parameterisation can give a high source of uncertainty, and there is an urgent ... for the DWBA, both based on a discretised­ bent tapered cylinder form: the uniformly bent cylin der ... used to develop an inversion protocol in a multifrequency context for estimating the mean length and ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Autor(es): Calise, L. and G. Skaret

10. Notothenia (P.) guntheri stock status and TAC estimation in the area of Shag Rocks (Subarea 48.3)

    (Subarea 48.3) Abstract / Description:  Data on age composition of catches and fishing efforts for 1979/80 ... . guntheri abundance was estimated as 227 thousand tonnes (using all the above mentioned methods). For 1986 ... -1987/88 were used to analyse N. guntheri stock status. On the basis of these data using VPA method with ... , using F regression on fishing effort and using average weighted F. Prior to the beginning of fishery N ... biomass by years (thousand tonnes). Stock status and TAG prediction, if F is an average value for the ... on age composition of catches and fishing efforts for 1979/80-1987/88 were used to analyse N ... . guntheri stock status. On the basis of these data using V P A method with different adjustments stock ... adjustments were used. Longterm mean of F, Gamma method, Pope and Shepherd method, using F regression on ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 53-68 : Autor(es): Shust, K. and R. Borodin

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