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  • 20世纪80年代初 首次提出“政企分开”的概念。民航北京管理处顺应时代要求,实行重大体制改革,组建了中国民航北京管理局、中国国际航空公司和北京首都机场
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  • 20世纪80年代初 首次提出“政企分开”的概念。民航北京管理处顺应时代要求,实行重大体制改革,组建了中国民航北京管理局、中国国际航空公司和北京首都机场
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  1. Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region

    assessment is biased low by 19–43%. Mormede et al. 20 one or the other of these methods are available ... (median of about 20 km after a year at liberty, see Parker et al., 2013), suggests that the assumption ... 31.3 3.5 7.9 29.5 5.4 12.5 30.8 881D 5.9 4.2 9.4 2.1 4.3 27.4 0.0 0.0 - 881E 4.2 6.5 20.3 3.6 7.0 ... 25.4 3.8 7.1 25.1 881F 2.6 3.1 15.6 2.8 3.9 18.4 3.1 4.8 20.4 881G 5.6 9.1 21.4 6.4 9.8 20.2 8.4 13.8 ...

    Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Author(s): Mormede, S., A. Dunn, S. Hanchet and S. Parker

  2. Otolith and body size relationships in the mackerel icefish (Champsocephalus gunnari)

    the relationship: Standard length = (96.67 X otolith length) - 20.02 (n = 350, r2 = 0.96). These results ... = 0.98). The results of Hecht (1987) are from 52 fish varying from 20 to 51 cm total length, a range ... during the spawning season when the gonad mass may increase the total mass by 20% (Kock, 1992 ... 3.5 4.0 4.5 ACKNOWLEDGEMENTS Upper C1 13.8 20.3 27.4 35.0 43.0 51.5 60.3 Table 2: Com ...

    Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 117–123 : Author(s): Everson, I., B. Bendall and A. Murray

  3. Diurnal variations in biological characteristics of krill, Euphausia superba Dana, to the west of the South Orkney Islands, 24 March to 18 June 1990 - based on data reported by a biologist-observer

    from 6 to 8, 12 to 14 and 18 to 20 hrs. Some changes were also observed in females, but they were less ... of Station IT. 213 St.IU} 6-8 h o M I F T 12-14 h o M 11 Ii F T TL}t.'\r:t 18-20 ... .!,.-' ,1~.... . .. -' , --"'~"-" .-.- -'" .. .,::""'-----. -_ .. ...:::,:........ ----.....,....::..---'." 20 11 ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 201–222 : Author(s): Vagin, A.V., R.R. Makarov and L.L. Menshenina

  4. Age, growth and size at sexual maturity of Macrourus carinatus caught as by-catch in Australian sub-Antarctic trawl fisheries

    by the dashed lines. 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 200 250 300 350 400 450 ... Distal Proximal Dorsal Ventral van Wijk et al. 142 0 5 10 15 20 25 30 -500 -400 -300 ... whitsoni from the Ross Sea. 0 100 200 300 400 500 600 700 0 5 10 15 20 25 30 Age (years) To ta ... end of each bin. 0 5 10 15 20 25 30 200 250 300 350 400 450 500 550 600 650 700 Total length ...

    Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 139–151 : Author(s): van Wijk, E.M., R. Williams and A.J. Constable

  5. Do krill and salps compete? Contrary evidence from the krill fisheries

    to 0.625 ppm (1.78-6.25 X 108 pm3 I-'), and most of this variation was due to particles greater than 20 ... for krill, which effectively filters particles larger than 20 pm (Meyer and El-Sayed, 1983), thereby ...

    Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 205–216 : Author(s): Kawaguchi, S., T. Ichii, M. Naganobu and W.K. de la Mare

  6. Selectivity of commercial and research trawls in relation to krill

    -meshed chafer (mesh size - 20 mm) which protects the codend against mechanical wear and tear. The trawl ... classes. Catch (tonnes) 7.0 7.0 5.0 Time 15:4O - 16:lO 20:3O - 21:OO 00:53 - 01:23 ...

    Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 161–169 : Author(s): Kasatkina, S.M

  7. Some comments on the procedure for testing estimators of krill abundance which utilise survey data

    between [0, 0.5] and [2, 20] km, and too high in the complementary ranges. The fact that the X Z values ... ) - - - 4.57 - 200 63 64 68 69 • Day aggregation .... Night aggregation 16 18 20 22 24 26 28 ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Author(s): Butterworth, D.S., D.L. Borchers and D.G.M. Miller

  8. A comparison between otoliths and scales for use in estimating the age of Dissostichus eleginoides from South Georgia

    and a much less productive fishery. Sustainable exploitation rates should have been 20-30% of that based ... the use of otoliths and scales in estimating tootlifish age 0 10 20 30 40 50 10 20 30 40 50 Reader ...

    Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 75–92 : Author(s): Ashford, J.R., S. Wischniowski, C. Jones, S. Bobko and I. Everson

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

    -exploitation spawning biomass at some time over the 20-year projection period is equal to 10%. + Values ... (a) 1.21 I 0 10 20 30 40 50 60 Length (mm) Selectivity (b) 1.6 1 1 0 2 4 6 Age (years) Relative ... 1 0.8 0.6 0.4 0.2 0 0 10 20 30 40 50 60 Length (mm) Proportion mature (b) 1.6 ... of Uncertainty (a) Run 1 Biomass (thousand tonnes) Recruits (millions) 0 10 20 30 40 50 Years (b) Run ...

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

  10. An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba

    Universitat Kiel, Dusternbrooker Weg 20, 2300 Kiel, Federal Republic of Germany. Les relations publiees des ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 371-373 : Author(s): Morris D.J., J.L. Watkins, C. Ricketts, F. Buchholz, and J. Priddle

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