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1. A simulation study of krill fishing by an individual Japanese trawler

   . A major inconsistency is found: haul times are a factor of 4-5 times greater in reality than in the ... abundance indices (generally of a CPUE form) for krill biomass in the 600 n mile square oceanic sector ... modelled are considered, and their performance in response to a variety of ways in which the overall krill ... time) are of low utility in detecting biomass decline. Combination catch rate indices incorporating ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 1–108 : Autor(es): Butterworth, D.S.

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

   model is recognised as state-of-the-art in predicting acoustic target strength (TS) from fluid-like ... TS of Antarctic krill (Euphausia superba) for use in the acoustic echo-integration method. In this ... the distribution of animal orientations. Due to the high variability of TS to realistic changes in ... variability of krill in the area of investigation. In a multifrequency context, the girth–length relationship ... (TS)) is known. TS of an aquatic organ- ism can either be measured directly (in situ or ex situ) or ... modelled (Foote, 1991). In the case of zooplankton, due to the complexity of the scatter- ing processes ... , the acoustical estimates rely on the best aspects of both approaches. In recent decades, large ... acoustical impedance contrast. The latter depends on the difference in density and sound speed between the ...

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

3. Possible effects of different levels of krill fishing on predators – some initial modelling attempts

   CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... krill predator species. A 'one-way' interaction model is developed, in which krill abundance ... that variability in the annual recruitment of krill results in predator populations being less ... some krill predator populations, and on the possibility of biases in their estimation. These matters ... ) in 1992, in order to investigate the possible effects of krill fishing on krill predators. First ... ' interaction model is developed, in which krill abundance fluctuations impact on the predator population, but ... not vice versa. Computations based on this model indicate that variability in the annual recruitment ... of krill results in predator populations being less resilient to krill harvesting than deterministic ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Autor(es): Butterworth, D.S. and R.B. Thomson

4. Biology and harvesting of Dissostichus eleginoides around the Kerguelen Islands (Division 58.5.1)

   species in the fisheries of the Southern Ocean. In Division 58.5.1, a directed trawl fishery has been in ... operation since 1984/85 and has expanded in the deep western sector of the Kerguelen Shelf. This fishery ... biological information on population dynamics, as well as demographic structures and trends observed in an ... is becoming an increasingly important species in the fisheries of the Southern Ocean. In Division ... 58.5.1, a directed trawl fishery has been in operation since 1984/85 and has expanded in the deep ... well as demographic structures and trends observed in an abundance index, is provided. Prospects for ... . REFERENCES CHECHUN,1.S. 1984. Feeding and food interrelationships of some sub-antarctic fishes in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 85–106 : Autor(es): Duhamel, G.

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

   - 14.8-38 cm). Otolith and scale readings have been compared in 19 Potter Cove specimens. In some cases ... scale readings gave a result of one year more. This could arise from the difficulty in differentiating ... between false and annual checks in scales. Age determination by otolith cross sections proved to be the ... those in the same age group around South Georgia. Likewise, our values are lower than the ones reported ... compared in 19 Potter Cove specimens. In some cases scale readings gave a result of one year more. This ... could arise from the difficulty in differentiating between false and annual checks in scales. Age ... from the Antarctic Peninsula Subarea are smaller than those in the same age group around South ... Otoliths/Scales/Bones Exchange System established by CCAMLR will help to eliminate discrepancies in age ...

   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.

6. Editorial

   the Southern Ocean. In particular there is a suite of papers that address key aspects of improving ... of analysis of data gathered on fishing vessels to using trends in patents to predict the future for ... specialist groups as well as the more traditional peer-review process. The papers in this volume of CCAMLR ... fishing in the Convention Area. For example, in the case of toothfish there are papers that develop our ... . In particular there is a suite of papers that address key aspects of improving assessment of the ... analysis of data gathered on fishing vessels to using trends in patents to predict the future for krill ... well as the more traditional peer-review process. The papers in this volume of CCAMLR Science broadly ... reflect the important areas of research used to provide advice on the management of fishing in the ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 167 : Autor(es): Editors

7. Investigations of required sampling regimes for environmental parameters

   / Description:  The sensitivity of different sampling regimes in identifying inter-annual changes in ... 1987. Strong daily, depressional (4 to 5 days) and yearly cycles were seen in temperature, wind speed ... and pressure. Sampling daily maxima and minima would be sufficient to detect a 2 to 3°C change in ... speed continuously or as daily maxima and minima would be sufficient to detect a 10 to 20% change in ... regimes in identifying interannual changes in environmental parameters was investigated using ... ) and yearly cycles were seen in temperature, wind speed and pressure. Sampling daily maxima and ... minima would be sufficient to detect a 2 to 3°C change in monthly mean temperature over two years with a ... would be sufficient to detect a 10 to 20% change in monthly mean log-transformed wind speed a of 0.05 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 561–573 : Autor(es): Agnew, D.J.

8. A compilation of parameters for ecosystem dynamics models of the Scotia Sea – Antarctic Peninsula region

   – Antarctic Peninsula region Abstract / Description:  Expansion of the krill fishery in the Scotia Sea ... compiles parameters for use in the ecosystem dynamic models that are needed to assess these methods. These ... species that feed on krill in this region. Maximum krill transport rates are also derived from the OCCAM ... are provided where possible. The results suggest that fish are the major krill consumers in all SSMUs ... the krill fi shery in the Scotia Sea–Antarctic Peninsula region beyond the current operational catch ... amongst smaller spatial units. This paper compiles parameters for use in the ecosystem dynamic models ... parameters for the fi sh, whale, penguin and seal species that feed on krill in this region. Maximum krill ... suggest that fi sh are the major krill consumers in all SSMUs, with perciform fi sh taking as much krill ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 1–25 : Autor(es): Hill, S.L., K. Reid, S.E. Thorpe, J. Hinke and G.M. Watters

9. Effects of different harvesting strategies on the mackerel icefish Champsocephalus gunnari around South Georgia

   interval of three years with no fishing in between; and changes in net selectivity resulting in a shift in ... fishing proved to be the least preferable harvesting alternative. In the absence of regular recruit ... , should not occur earlier than four years after a good recruitment. A forward shift in partial recruitment ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 77–100 : Autor(es): Köster, F.W. and K.-H. Kock

10. Catch-at-age analysis applied to new fisheries: the case of Dissostichus eleginoides

    Abstract / Description:  Traditionally, the approach used in the assessment of new fisheries has been based ... resource by coarse methods. The main aim of such surveys is to monitor fishing operations in order to ... develop a comprehensive sampling design which will provide data in line with assessment procedures that ... are quite similar to those commonly used in the statistical sampling theory. These procedures are, to ... , the approach used in the assessment of new fisheries has been based on research surveys, making it ... of such surveys is to monitor fishing operations in order to develop a comprehensive sampling design ... which will provide data in line with assessment procedures that are quite similar to those commonly ... used in the statistical sampling theory. These procedures are, to a certain extent, limited by the ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 3–9 : Autor(es): Zuleta, A.V. and C.A. Moreno

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