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1. A balanced model of the food web of the Ross Sea, Antarctica

   recent year (1990–2000). The focus of the model is on the role of Antarctic toothfish in the food web ... model has 38 trophic groups and is balanced in terms of annual flows of organic carbon in an average ... ) in trophic flows between groups. Parameters for biomass, production rate, growth efficiency, diet ... efficiency) and all groups together was 1.7%, and for diet fractions was 0.6%. Large but not implausible ... appropriate given the inconsistency in available data across organ- isms, seasons and years. The trophic ... average recent year (1990–2000). The focus of the model is on the role of Antarctic toothfish in the food ... assumption that all parts of the ecosystem will be in balance in an average year. These balance equa- tions ... over a year (dimensionless); Fi fishing removals (gC m–2 y–1). Note that Fi = 0 for all groups in ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 1–31 : Autor(es): Pinkerton, M.H., J.M. Bradford-Grieve and S.M. Hanchet

2. Results of fish stock assessment survey, South Georgia region, November - December 1986

   rossii and Patagonotothen brevicauda guntheri were an order of magnitude lower than observe by Kock in ... 1985. Abundance of Dissostichus eleginoides and Pseudochanichthys georgianus appeared lower in 1986/87 ... Champsocephalus gunnari were larger in 1986/87 than 1984/85, probably due to good recruitment of 1983/84 and 1984 ... /85 year classes. Coefficients of variation ranged from 67.9% (Notothenia squamifrons) to 12.6% (C ... late 1970's in the South Georgia region has been documented for several years (e.g., Kock et al ... lengths ranged between 13-76 cm, with an overall mean length of 34.2 cm (Figure 20). In contrast to ... far more likely that the stock has continued to decline in recent years rather than stabilizing or ... since 1984/85. When length frequencies 30 cm or greater are considered, in 1984/85 about half the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 143-183 : Autor(es): Gabriel, W.L.

3. Estimating krill recruitment and its variability

   recruits in a population sampled by a net haul survey. Preliminary results from a series of five net haul ... surveys in the South Atlantic and the Indian Ocean sectors of the Southern Ocean give a mean recruitment ... rate for 1+ krill (the ratio of the number of krill aged one year to the number of krill aged one year ... for 2+ krill (the ratio of the number of two-year-old krill to the number aged two and above) from ... ), taking the second group with mean length in the range 30 to 38 mm as age class 2, are: Number of ... in those years, or the survey results are not representative for this age class. If the former is ... estimates used in these analyses. I am also grateful to the large number of scientists who have laboured ... la Mare 10 9 8 7 6 h Y .M 5 a 4 3 2 1 0 0 10 20 30 40 50 60 70 Length ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Autor(es): de la Mare, W.K

4. Review of length-weight relationships for Antarctic krill

   927mg 913mg 931 mg 912mg 860mg 796mg Data for February were collected in different years and ... of one month (Table 4). Because spawning may occur in different months during different years ... for wet wei~ht (in mg) and total length (AT in mm). Month Several years Several years ... indicate the timing of spawning varies from year to year. The seasonal variation in krill weight clearly ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 145–155 : Autor(es): Siegel, V.

5. Potential interactions between wandering albatrosses and longline fisheries for Patagonian toothfish at South Georgia

   continental shelf in areas very similar to where the longline fishery operates and are therefore at serious ... risk from these fisheries at this time. Until fishing methods which do not catch albatrosses are in ... comprehensive use, we recommend that the South Georgia longline fishery for D. eleginoides should be managed in ... , satellite-tracking, South Georgia, wandering albatross INTRODUCTION Over the last 20 years wandering ... Island for their assistance in the research on satellite tracking of D. exulans in recent years ... m and deeper. - - and fishing took place in most months of the year with between 1 and 12 ... South Georgia continental shelf in areas very similar to where the longline fishery operates and are ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 101–110 : Autor(es): Croxall, J.P. and P.A. Prince

6. An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba

   predictors of wet or dry weight in Antarctic krill Euphausia superba Dana are standardised with new data on ... biomass based on acoustic data. An alternative approach is examined in which length and additional ... biological data are assessed in terms of decreases in the residual variance of relationships. We have ... identified key sources of variability where relatively small increases in the effort of analysis result in ... ) Abstract Published relationships of various length measurements as predictors of wet or dry weight in ... alternative approach is examined in' which length and additional biological data are assessed in terms of ... decreases in the residual variance of relationships. We have identified key sources of variability where ... relatively small increases in the effort of analysis result in large improvements in the precision of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 371-373 : Autor(es): Morris D.J., J.L. Watkins, C. Ricketts, F. Buchholz, and J. Priddle

7. Krill population biology during the 1991 Chilean Antarctic krill fishery

   419 hauls. In Area A, a unimodal size frequency distribution was found; the size range was between 30 ... / Description:  Population biology of Antarctic krill, Euphausia superba, was studied from samples taken in 1991 ... spermatophore had a 36.5 mm TL, 80% of the females with spermatophores had a TL larger than 45 mm. In Area B, a ... juvenile specimens between 20 and 39 mm TL. Females comprised 47.1%, males 40% and juveniles 12.9%. Of the ... : Total catch (tonne/mile) in both areas during the three time periods. 50 % 60 40 30 20 10 ... ' 59°55,3' 2.60 58 14 21:30 21.02.91 62°08,1' 59°51,5' 2.40 50 20 09:30 22.02.91 62°08,9' 59°56,4 ... °17,6' 2.70 50 30 18:20 03.03.91 62°26,0' 61 °17,8' 2.80 40 39 08:30 04.03.91 62°33,5' 61 °22,7' 2.90 ... % 50 40 20 o V / / '" Males Females Juveniles Figure 7: Sex composition of E. superba in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 223–235 : Autor(es): Mujica R., A., E. Acuña S. and A. Rivera O.

8. Distribution of mackerel icefish (Champsocephalus gunnari) (Channichthyidae) around South Georgia at various stages of its life cycle

   cm in length) were mainly found in the southern part of the study area, immature fish (15–25 cm) in ... the east and southwest, and adults (25–39 cm) in the north. The distribution of C. gunnari changes ... bottom during the day and in the water column at night. Larger fish (>40 cm) did not undertake ... vertical migrations. Variations found in the depth distribution of C. gunnari relate both to fish length ... May–June. The time of spawning relates to the temperature regime of the year, i.e. in warmer years ... / 19 86 L en gt h ra ng e (m m ) 60 –1 30 80 –1 30 60 –1 40 70 –1 20 M od al le ng th ... 0 m m 28 % 20 % 90 m m 10 0 m m 44 % 47 % N um be r of in d iv id ua ls ... surveys in 1990. Food items included krill (Euphausia superba) (50–70%), amphipods (15–20%) and fi sh ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 49–69 : Autor(es): Frolkina, Zh.A

9. Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   described, from the Coastal Zone Colour Scanner (CZCS) in the late 1970s through to the Ocean Colour and ... regard to their use in the Southern Ocean. A brief history of algorithms linking ocean colour to primary ... ) data as input. Note the close match in the modelled and observed estimates for each of the six years ... calculate primary productivity, usually in units of mmolC m–2 or mgC m–2 per unit time (day or year). In ... highest monthly productivity number they calculated (based only on one year of data, 1997/98) was in ... significant spatial and temporal vari- ability in primary productivity. It is also the region of the global ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Autor(es): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear

10. The foraging range of Adélie penguins – implications for CEMP and interactions with the krill fishery

    undertaken are shown in Figure 1. The numbers of penguins tracked, the numbers of trips and the years over ... krill has previously been harvested, may lie within their foraging range in other years. DISCUSSION ... closest edge of a polynya which forms each year in this region (Kerry et al., 1995a). The location of ... overlap between the foraging areas of these birds and the areas where krill fishing has taken place in ...

    Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 75–87 : Autor(es): Kerry, K.R., J.R. Clarke, S. Eberhard, H. Gardner, R.M. Lawless, S. Corsolini, S. Focardi, E. Franchi, D. Rodary and R. Thomson

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