Résultats de la recherche

1. Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region

   ratio of 0.88 to 0.94 for different years. The exchange rate of water masses and krill biomass within ... three year life span of krill. Their age group 1 (20 to 43 mm) included the two age groups 1+ and 2 ... frequencies from whale stomachs and found high abundances of 20 to 30 mm juvenile krill. These size groups ... during the last years several year-classes had been poor or almost missing, e.g. year-class 1983/84 as ... year life span (Rosenberg et al., J986) or eight age groups and a maximum longevity of seven years ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Auteur(s): Siegel, V.

2. Statistical power to detect changes in growth rates of Antarctic fur seal pups

   changes (between years) in pup growth rates, the loss of power associated with obtaining weight samples on ... ------- ------- Females ------- mean mean Date n weight (kg) s.d. n weight (kg) s.d. 1988: 2 Jan 30 9.91 1.60 20 8.78 ... :=,8=0.1 0:=,8=0.1 + + 15 20 25 CHANGE IN 30 35 40 GROWTH 45 50 RATE Figure 2: If the ... cx={3=.l cx={3=.05 t t ALL CURVES: 4 weighing dates 28-day intervals 50 pups/day 15 20 25 30 ... for each year and as weighted averages of both years. Growth Rate Standard Error (kg/d) of Growth ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 399–409 : Auteur(s): Boveng, P., J.L. Bengtson and M.E. Goebel

3. CCAMLR ecosystem monitoring and a feedback management procedure for krill

   alter conservation measures based on options in Article IX of the CCAMLR Convention and dictated by the ... sufficient time to ensure that the objectives set out in Article IT of the CCAMLR Convention are not ... , Article IT can be translated, in the case of the predators, to ask the general question "Will fishing for ... relationships as described in Article 11. As a result, the goals in predator protection for the kriU fishery ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Auteur(s): Constable, A.J.

4. Supplementary data on exploited stocks in Division 58.5.1 (Kerguelen)

   year to the next (Table 2) in relation to the availability of other exploited species, particularly ... C. gunnari stock should take account of the three-year cycle which has now been revealed, and catch ... rates of fish stocks in the South Georgia and Kerguelen Islands areas. SC-CAMLR-SSPI4: 229-30. 153 ... 20 3 3.3 o 11.6 10 1.6 5 2.1 2 0.0 2 0.2 21 1 1.1 o 11.6 21 20.6 26 11.0 14 0.2 1 0.1 Cohort 1985 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 147–161 : Auteur(s): Duhamel, G.

5. Trawl bag selectivity in the Champsocephalus gunnari fishery

   from previous years demonstrates close similarity. A significant increase in modal length (up to 34-35 ... - 7 19 - 16 20 30 38 21 - 20 22 - 20 23 - 24 24 38 64 25 534 373 26 1436 866 27 2984 1430 28 ... AND AREA Selectivity hauls were made from 17 to 20 June 1990 in an area having the mean coordinates ... 4 5 6 7 1 312 17.06 12.05 11 3000 25 2 313 11 13.55 10 2000 10 3 314 11 15.37 20 4500 51 4 315 ... 11 19.03 17 2000 32 5 316 11 20.41 23 1000 48 6 317 " 22.26 52 1500 30 7 319 18.06 06.35 40 000 32 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 295–312 : Auteur(s): Bidenko, V.G. and I.G. Istomin

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

   Type I and Type II errors. Lack of knowledge about the sex ratio between years makes combining the data ... changes may be masked. For instance, if all females are sampled one year, and all males the next, then ... of up to 20%, a very serious situation (Type II error). 6. DISCUSSION It is apparent that it ... 0.68 13 1.28 90.00 1.28 1.63 4.30 433 1.44 50 0.76 15 1.65 95.00 1.65 1.93 4.64 505 1.65 66 0.89 20 ... knowledge about the sex ratio between years makes combining the data a very doubtful procedure and use of a ...

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

7. Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea

   been validated. The maximum estimated age was 14 years, but this should be regarded as a conservative ... ]), where L t is the pelvic length (PL) in centimetres at age t years. Applying this growth curve to the ... ages at maturity of 6–7 years for males and 8–11 years for females. These estimates are near the middle ... (year–1) t0 ± SE (years) Females 77 69.2 ± 3.1 0.402 ± 0.169 –0.73 ± 1.13 Males 58 79.9 ± 14.5 0.163 ... determine Pelvic length (cm) 0 20 40 60 80 100 T ho rn le ng th ( m m ) 0 2 4 6 8 10 12 14 ... without the outliers was implausible, intersecting the x-axis at about one year. Thus no advantage was ... the Ross Sea P el vi c le ng th (c m ) (c) (b) (a) 0 2 4 6 8 10 12 14 0 20 40 60 80 ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Auteur(s): Francis, M.P. and C. Ó Maolagáin

8. Changes in biomass of eight species of finfish around the South Orkney Islands (Subarea 48.2) from three bottom trawl surveys

   the South Orkney Islands (Subarea 48.2) suffered substantial declines from split-year 1977/78 to 1989 ... conducted during daylight hours. The target time for a haul was 30 minutes, with any haul less than 20 ... ;;; 6 4 2 0 10 20 30 40 50 60 10 20 30 40 50 60 70 Length (cm) Length (cm) Figure 6: Length ... Orkney Islands (Subarea 48.2) suffered substantial declines from split-year 1977/78 to 1989/90. The ... eleginoides and unspecified finfish species. The first year of fishing yielded a catch of almost 140 000 ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 53–74 : Auteur(s): Jones, C.D., K.-H. Kock and E. Balguerías

9. Some specific features of the USSR krill fishery and possibilities of applying fishery statistics to studies of krill biology and stocks

   operations very short hauls (under 15 minutes) are practised. Such fishing practice, together with ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 237–252 : Auteur(s): Dolzhenkov, V.N., T.G. Lubimova, R.R. Makarov, S.S. Parfenovich and V.A. Spiridonov

10. Biological characteristics of Antarctic fish stocks in the southern Scotia Arc region

    takes one year or more, whereas in others gonad maturation was completed within one season. Length at ... sexual maturity and length at first spawning in  Champsocephalus gunnari  was one year later on the ... , despite substantial catches in the first four years of the fishery and ample opportunity to sample these ... catches. The only scientific surveys of these stocks during these years were conducted by Germany in 1985 ... of 20-30 m off the southwest coast of Elephant Island by a 3 m beam trawl. Early juveniles of other ... that in some species final maturation of the gonads takes one year or more, whereas in others gonad ... ~psoceplzaltis gtinnari was one year later on the southerly grounds than at South Georgia. The distribution of ... was negligible due to the use of small-meshed (20 mm) liners. All sampling stations (Figures la-lc ...

    Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 1–41 : Auteur(s): Kock, K.-H., C.D. Jones and S. Wilhelms

Pages