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1. The use of predator-derived krill length-frequency distributions to calculate krill target strength

   calculated from acoustic data. Changes in the lengthfrequency distribution of krill over a period of a few ... weeks produced a 10% difference in TS, whereas simultaneous samples from predators and nets produced ... robust estimate of krill abundance to be calculated from acoustic data. Changes in the length ... - frequency distribution of krill over a period of a few weeks produced a 10% difference in TS, whereas ... resource management and to understanding the response of predators to environmental changes. In many ... cases variability in prey availability has been inferred from changes in predator performance. Clearly ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Автор(ы): Reid, K. and A.S. Brierley

2. Brief comments on the simulation study made by Professor Butterworth on krill fishing by an individual Japanese trawler

   fishing by an individual Japanese trawler Abstract / Description:  In this paper, three essential ... values used for the minimum catch rate per overall elapsed time. It is suggested that an improvement in ... Abstract In this paper, three essential questions are raised concerning the simulation study of the ... elapsed time. It is suggested that an improvement in our knowledge of krill distribution is necessary ... -concentration searching times might improve the utility of the data. We commend his efforts in making the ... fishery are useful in estimating the change of within-concentration krill abundance even if searching ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 347–350 : Автор(ы): Ichii, T. and Y. Endo

3. 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 ... significant spatial and temporal vari- ability in primary productivity. It is also the region of the global ... ocean where models and observations of air–sea CO2 exchange differ most significantly, both in sign ... estimates of all terms in the oce- anic carbon budget, including primary productiv- ity. In this paper ... , satellite and modelling techniques to estimate phytoplankton biomass and primary productivity in the ...

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

4. The error of the biomass estimate as a function of survey parameters and the statistics of a density field of krill aggregations

   the dependence of relative sampling error in a biomass estimate (from a survey) on the statistical ... (sections) serve as survey parameters. The relationships described here can be used in practice for both a ... error in a biomass estimate (from a survey) on the statistical characteristics of the fish ... parameters. The relationships described here can be used in practice for both a posteriori estimation of ... nature of the estimate in question. If such a dependence has been revealed, it would be possible to ... relationships Let ue at first confine to the easiest and most widespread method of e9timating biomass 8 in a ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 213-228 : Автор(ы): Kizner, Z.I.

5. Acoustic data analysis and models of krill spatial distribution

   / Description:  Acoustic data obtained on 4-5 January 1987 aboard the R/V Professor Siedlecki were used in three ... descriptors of krill spatial aggregation: power spectra for krill biomass fluctuations in space, semivariogram ... obtained on 4-5 January 1987 aboard the RN ProfesSor Siedlecki were used in three descriptors of krill ... spatial aggregation: power spectra for krill biomass fluctuations in space, semivariogram (spatial ... and plays an important role in supporting animal populations such as whales, seals and penguins as ... well as fish. Krill distribution is highly variable in space and time (Marr 1962), and krill often ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 311–329 : Автор(ы): Morin, A., A. Okubo and K. Kawasaki

6. Indices of prey availability near the Seal Island CEMP site: 1990 to 1996

   / Description:  Four indices of prey availability are calculated from surveys conducted in the vicinity of the ... these indices may be useful in modelling krill predator breeding success as a function of prey ... availability are calculated from surveys conducted in the vicinity of the Seal Island CEMP site during the ... be useful in modelling krill predator breeding success as a function of prey availability. Resume ... pattern and energy value. In this paper, indices are proposed for the first four of these aspects of ... sources. Approximately 50 000 km2 of sea surface area in the northern portion of the South Shetland ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Автор(ы): Hewitt, R.P., G. Watters and D.A. Demer

7. Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?

   index of a morphometric characteristic? Abstract / Description:  In sexually dimorphic species ... avoiding the necessity of sex determination. However, uncertainty in sex ratios can lead to considerable ... * Abstract In sexually dimorphic species, morphometric characteristics have separate distributions for ... determination. However, uncertainty in sex ratios can lead to considerable Type I and Type II errors. Lack of ... discriminante en la determinaci6n del sexo. 1. INTRODUCTION In sexually dimorphic species, morphometric ... recognised this problem, in 1991 noting that analyses by Scolaro et al. (1990) and Kerry et al. (1992) had ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Автор(ы): Agnew, D.J.

8. A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty

   the spawning stock biomass in accordance with CCAMLR criteria. These specify a bound on the ... specify growth, mortality, age-dependent selectivity and seasonal patterns in fishing mortality. Results ... the spawning stock biomass in accordance with CCAMLR criteria. These specify a bound on the ... incorporate functions that specify growth, mortality, age-dependent selectivity and seasonal patterns in ... the reproductive performance of the stock was not jeopardised (SC-CAMLR, 1987). In addition, this ... la t i on (a difficult task in any fishery). However, it is based on the assumption that the ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Автор(ы): Constable, A. and W.K. de la Mare

9. Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study

   sites in Antarctica. These examples focus on adjusting counts of adults to an effective number of ... colonial land-breeding species showing seasonal variation in availability to sampling methodology.  File ... breeding sites in Antarctica. These examples focus on adjusting counts of adults to an effective number ... for other colonial land-breeding species showing seasonal variation in availability to sampling ... failure to count all animals present in searched areas (detection bias, often measured as a detection ... some larger area of interest so that, in order to obtain estimates of total population size for the ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Автор(ы): McKinlay, J., C. Southwell and R. Trebilco

10. Target strengths of Antarctic krill (Euphausia superba)

    and 120 kHz in a sheltered bay at South Georgia. The results indicate that the Target Strength values ... Backscattering Strength of encaged aggregations of swimming krill have been measured at 38 and 120 kHz in a ... superba is recognised to occupy a key position in the Antarctic ecosystem (Everson 1987, Laws 1985). The ... attempt to quantify its abundance in 1981 over part of its area of occurrence in the Southern Ocean ... , defrosted or otherwise preserved specimens, in fresh water as well as sea water. In addition the state of ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Автор(ы): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote

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