Resultados de la búsqueda

1. Fish stock assessment survey in Subarea 48.3

   decline by comparison with results from the 1989/90 season. Other species do not show a similar dramatic ... have undergone a major decline by comparison with results from the 1989/90 season. Other species do ... this subarea has been emphasised by the CCAMLR Working Group on Fish Stock Assessment (WG-FSA) (SC ... -CAMLR, 1990a). This report presents the results from a fish stock assessment survey undertaken by the ... divided into CCAMLR 'fine-scale rectangles' half a degree of latitude by one degree of longitude. Within ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Autor(es): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski

2. Acoustic estimates of krill density at South Georgia, 1981 to 1998

   1994 austral summer seasons were characterised by particularly low densities of krill (upper 95 ... , 1991 and 1994 austral summer seasons were characterised by particularly low densities of krill (upper ... seems to be an integral feature of the South Georgian marine ecosystem (reviewed by Brierley et al ... . The area covered by the 1982 cruise was very extensive and included long transects in oceanic water ... years; by convention the year given refers to the year in which the season ended) BAS has conducted ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Autor(es): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson

3. Guidelines for the preparation of hydroacoustic survey reports on krill

   a report of a hydroacoustic survey performed as part of FIBEX by the Soviet research vessel Odyssey ... hydroacoustic survey performed as part of FIBEX by the Soviet research vessel Odyssey during the period from ... ~Hcno HepeCTHBlliHXCfl CaMOK paBHHnOCD KonH~eCT­ BY nonOB03penHX caMUOB. C Ha~ana MapTa nonynflUHfl B ... cruise-track of vessel. Areas covered by the international FIBEX programme. Histogram of length ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 165-193 : Autor(es): Kalikhman, I.L.

4. Methods of age determination for mackerel icefish (Champsocephalus gunnari Lönnberg 1905) from the South Georgia Island shelf

   of mackerel icefish (Champsocephalus gunnari) from the South Georgia shelf were determined by ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 37–49 : Autor(es): Frolkina, Zh.A.

5. Some thoughts on precautionary measures for the krill fishery

   the potential yield model developed by the CCAMLR Scientific Committee's Working Group on Krill ... discussed. A precautionary catch limit, based on the potential yield model developed by the CCAMLR ... based on the use of a model that conceptually is relatively simple and is given by the formula: In ... synoptic survey of krill will be affected by the distribution of krill over a much larger area; repeat ... flow are influenced considerably by local patterns on the shelf and at the shelf-break. Within the ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 1–11 : Autor(es): Everson, I. and W.K. de la Mare

6. Age determination of Champsocephalus gunnari Lönnberg, 1905 (Channichthyidae) taken in the South Georgia area in 1990

   composition of catches taken by Akademik Knipovich had three peaks corresponding to size groups of 16-18, 24 ... the South Georgia area. In February 1990 the size composition of catches taken by Akademik Knipovich ... significantly slower growth rate when compared with earlier data produced by most authors (see Table 1). It ... should be noted that the American scientist, R. Radtke, determined age by counting microincrements of ... determining ftsh age by counting daily microincrements on otoliths since, according to O. Pannella's data ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 285–293 : Autor(es): Kochkin, P.N.

7. Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed with mitochondrial and intron DNA markers

   appeared to be characterised by low diversity; no genetic variation was detected with restriction enzyme ... digests of nine sub-regions of the mitochondrial genome. Polymorphisms were found in four of seven introns ... Division 58.4.2. D. mawsoni appeared to be characterised by low diversity; no genetic variation was ... 75°S (Gon and Heemstra, 1990). D. mawsoni appears to be restricted to waters managed solely by ... from 200–500 mg of muscle tissue by homogenisation and digestion with proteinase-K at 55°C for 4 h ... . After digestion, DNA was extracted with phenol:chloroform, followed by chloroform:iso- amyl alcohol ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 43–51 : Autor(es): Smith, P.J. and P.M. Gaffney

8. Size at sexual maturity of Patagonian toothfish (Dissostichus eleginoides)

   bias leading to the overestimation L m50 of  calculated by conventional methods. Further analysis ... overestimation of Lmjo calculated by conventional methods. Further analysis allowing for this bias indicates ... CCAMLR Scheme of International Scientific Observation, by providing for coverage of the whole fishing ... 1996 and 1997 calendar years were prepared by the CCAMLR Data Manager and provided for the purpose ... is described by Ni and Sandeman (1984), where p is the estimated proportion of fish in a category ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 37–46 : Autor(es): Everson, I. and A.W. Murray

9. Target strengths of krill at 136 and 20 kHz

   krill target strength was made by ensonifying encaged live krill and using trawl hydroacoustic method ... KHZ S.M. Kasatkina* Abstract Estimation of krill target strength was made by ensonifying encaged ... identified lower target strengths (by almost 10 dB) compared to those values used until now in biomass ... estimates as recommended by the Post-FIBEX Workshop (Anon., 1986). With this in mind the CCAMLR Working ... krill TS carried out by AtlantNIRO from 1980 to 1985. We feel that these may be useful in general ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Autor(es): Kasatkina, S.M.

10. Consideration of major issues in ecosystem monitoring and management

    within which to investigate krill availability. Vital rates can be investigated directly and also by ... a strong long-shore current within which krill could be entrained, as found by Everson and Murphy ... krill availability. Vital rates can be investigated directly and also by means of CEMP. The overlap ... to which the ecosystem ap- proach has been implemented by CCAMLR, with a view to examining how the ... was developed by Butterworth et al. (1991, 1994) and Constable and de la Mare (1996) is a ...

    Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Autor(es): Everson, I

Páginas