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

   on research surveys, making it possible to estimate the standing stock and potential yield of a ... fish stocks, which seriously affect model assumptions. This paper demonstrates that for the new fishery ... , analyses using catch-at-age data derived from research cruises may provide an alternative to other methods ... parameters presented in Table 1. Catch data were available for two years (1991 and 1992), which could be ... fisheries are based on research fishing procedures which provide information for evaluation of the standing ... least the last two fishing seasons, as well as those based on previously unexploited stocks. The catch ... operation was authorised by the Chilean Subsecretarfa de Pesca de Chile, under an agreement on technical ...

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

2. Size compositions of males and females in the course of the life cycle of Euphausia superba

   during the reproductive cycle. Information on size composition by sex is considered to be vital for an ... , using samples from different years. The observed variations were related to stages of krill maturity ... dates on which the reproductive cycle stages occurred. For this reason an analysis of the stages of ... composition by sex is considered to be vital for an understanding of krill population structure. It is ... maturity of females has been carried out for all samples combined. The bulk of the data used are data on ... ) will help researchers to develop an optimal sampling strategy for the subsequent thorough analysis of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 3–16 : Автор(ы): Makarov, R.R.

3. Commercial fishing vessels as research vessels in the Antarctic – requirements and solutions exemplified with a new vessel

   as adequate monitoring, to avoid unintended impacts on the harvested stocks and the associated ... readily available for conventional coverage of harvested stocks and their ecosystems. This paper describes ... fishing and research vessel could make a large amount of important data available for both management ... , through CCAMLR, and the broader scientific community and thus improve the basis for resource evaluation ... accommodate 20 scientific crew on longer cruises. The vessel will have a dedicated fibre optic network for ... fishing activity and climate change might have unfavourable effects on the ecosystem, for exam- ple ... years, most new research vessels, and also some fishing vessels, are being equipped with an instrument ... scientific use when the vessel is new. In general, space for a 20 ft container laboratory van would be ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 11–17 : Автор(ы): Godø, O.R., C. Reiss, V. Siegel, J.L. Watkins

4. Book review: Fish and Fish Resources of the Antarctic

   Antarctic bioresources, firstly by individual groups under the auspices of SCAR (Scientific Committee for ... Antarctic Research), and later, after the coming into force of the Convention on the Conservation of ... knowledge acquired by the author over a period of more than 30 years allowed lum to analyse both the ... for the future harvesting of fish stocks based on the fisheries potential of areas with high ... author believes that the most promising areas for future fishing are the two largest zones in terms of ... under the auspices of SCAR (Scientific Committee for Antarctic Research), and later, after the coming ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 165–168 : Автор(ы): Shust, K.V

5. The status of krill (Euphausia superba DANA) resources in CCAMLR Statistical Divisions 58.4.2 and 58.4.3 from 1988 to 1990. Results of acoustic surveys

   abundant 1986 and 1987 year-classes and with a diminished rate of emigration of krill of these year-classes ... LogL Two types of trawls were used for kriU sampling: an Isaacs-Kidd midwater trawl with a 6.0 sq. m ... to 1979, but considerably higher (3 to 4 times) than in 1986/1987. On the basis of many years of ... previous period (1986 to 1988) and for an increase in krill biomass in the area. The data in Table 2 ... particular, in the southern coastal waters of the area (south of 65°30'S). Until 1988 krill biomass was ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 163–173 : Автор(ы): Bibik, V.A. and V.N. Yakovlev

6. The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design

   krill which are used in models to estimate sustainable yield in Area 48. The survey design includes two ... boundaries is described. The methods used for selecting the location of each survey transect are explained ... and the planned cruise tracks for each of the four vessels participating in the survey are shown ... . Details are also described for adaptively modifying the survey during its execution. This includes ... adopted. Such an approach has been widely used in the past (for instance FIBEX - BIOMASS, 1980) and was ... criteria (for example, the Scotia Sea and Subarea 48.1); survey boundaries therefore had to be based on a ... the two- stage process, all primary sampling units had an equal probability of being sampled; this ... gave the necessary condition for the validity of the design- based variance estimators. An ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Автор(ы): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly

7. Food and feeding of the mackerel icefish (Champsocephalus gunnari) around South Georgia in January/February 1991

   stomachs and the feeding intensity were uncommonly low in a period when energy rich food is needed for the ... to 3 877) and an unrepresentative coverage of the shelf from year to year. However, two pairs of ... needed for the final maturation of the gonads. Resume La composition du regime alimentaire et ... years when krill is abundant it represents the staple food. Mackerel icefish then tend to aggregate in ... areas of krill concentrations. In years of low krill abundance it is replaced in the diet by the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 15–23 : Автор(ы): Kock, K.-H., I. Everson, S. Campbell, G. Parkes, Z. Cielniaszek and J. Szlakowski

8. Modelling krill recruitment

   Paper Title:  Modelling krill recruitment Abstract / Description:  A method is developed for using ... for generating families of recruitment functions which are consistent with the statistical uncertainty ... to Justin Cooke and an anonymous reviewer for (30) helpful comments on the draft text of the paper ... parameter we need to fix for the krill model is the rate of natural mortality (M) . In an unexploited ... the quotient of two random variables, and hence the delta method expansion for the variance of (2 ... model is exercised for n years without exploitation prior to calculating the mean unexploited ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 49–54 : Автор(ы): W.K. de la Mare

9. A post-processing method to remove interference noise from acoustic data collected from Antarctic krill fishing vessels

   data has been recognised as an important way to estimate the distribution and relative abundance of ... degraded by interference noise due to the lack of synchronisation of the acoustic instruments found on some ... of the vessels. A simple method to remove significant interference noise was introduced based on ... the utility of fishing-vessel-based acoustic data for a range of objectives. File:  Wang et al.pdf ... 30 Wang et al. Figure 7: Frequency distribution of mean Sv (a) and variation of MVBS (b) for 20 ... of an attenuated signal may be compensated for by using the strength of the seabed return signal ... application of semi- or fully-automated post-processing methods (Cox et al., 2006). Based on a two-sided ... ) echogram as an array of values. Main processing procedures, as shown in Figure 1, are based on relevant ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 17–30 : Автор(ы): Wang, X., J. Zhang and X. Zhao

10. Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates

    an integrated stock assessment. Previous attempts to assess the relative reliability of vessels in ... detecting tagged fish have been inconclusive due to low numbers of recaptures after controlling for spatial ... controlling for spatial and temporal variables using a case-control study design, and uses this method to ... develop relative indices for detection rate performance for vessels involved in the Antarctic toothfish ... parameters. For example, under- estimating the tag-detection rate of the fleet will result in an ... to the annual fishing trips for each vessel. methods Initially, the case is defined as an ... vessels. The index for each vessel is also dependent on the performance of the vessels it is compared ... window used was a circle with a radius of 20 km, centred on the location of the case fishing event ...

    Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Автор(ы): Mormede, S. and A. Dunn

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