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  • 资源配置效率: 供应链优化:头部平台通过规模效应将采购成本降低35%,品控响应速度缩短至4小时(中小企业需72小时)。 流量分配不均:TOP5主播占据60%的流量,中小商家获客成本高达20元
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  • 资源配置效率: 供应链优化:头部平台通过规模效应将采购成本降低35%,品控响应速度缩短至4小时(中小企业需72小时)。 流量分配不均:TOP5主播占据60%的流量,中小商家获客成本高达20元
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  1. Otolith and body size relationships in the mackerel icefish (Champsocephalus gunnari)

    the other years (by transformed otolith length gave predicted fish some 4 cm at c. 60 cm) with ... to 4 cm at c. 60 cm) in 1990 and 1997; in other years predictions were very similar and close to To ... January 1992 and 4 to 28 September 1997. Sampling from the commercial fishery took place during the ... prediction limits of total lengths a little higher (a maximum of some the order,9.5 cm at 60 cm length. 3 ...

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

  2. Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea

    . 80 60 40 20 0 % c om po si tio n A B C D A ... ) and 120–135 cm (D). Values are mean ± SD. 70 60 50 40 30 20 10 0 % c om po si tio n ... - 0. 3 ± 0. 4 - C 20 :1 n1 1 - - - - - - - - - - C 20 :1 n9 3. 6 ± 2 ... - - - - - 0. 5 ± 0. 7 - - - 0. 4 ± 0. 5 C 20 :3 n6 - - - - - 0. 9 ± 1. 3 ...

    Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Автор(ы): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang

  3. An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort

    value of Di is calcu- lated: 1 1 1 2( ) (1 )( )i i iD O L E O L E= − + − − (4) where O1 is the ... the fi rst or the last of the patrol schedule, then Dj is set to a default maximum of 60 days. If ... patrols covering a quarter of the period; • 35% coverage – 15-day patrols covering 35% of the period ... earlier than day 1 and no later than day 200. The planned illegal cruise duration was between 40 and 60 ...

    Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Автор(ы): Ball, I

  4. A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ

    0 45 ) 21 4 12 1. 20 1 60 4 0. 39 2 0. 00 6 0. 09 3 0. 12 6 0. 11 9 Fi t 2 00 1 ... 20 K B ) u nd er a fu tu re an nu al ca tc h of 4 00 t on ne s. T he 9 5% co ... -4 .0 15 52 9 0. 39 2 0. 01 2 0. 12 8 0. 17 8 0. 18 3 H ig he r 20 00 a nd 2 00 1 ... 0. 07 9 0. 00 0 H ig he r M (0 .2 ) 15 4 40 (1 3 66 7; 4 9 33 0) 20 6 86 ...

    Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Автор(ы): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller

  5. Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea (CCAMLR Subareas 88.1 and 88.2) bottom longline fisheries targeting Antarctic toothfish

    and right axes show the frequency distribution of observations for each variable. 0 4 8 14 20 26 32 ... 04 ) 0. 04 0 (1 12 ) 3 A 0. 04 4 (1 57 ) - - - 4 A 0. 04 8 (1 35 ) 0. 02 ... . 01 3 (1 20 ) 11 A - 0. 02 9 (6 4) na - 12 A na 0. 05 5 (1 11 ) 0. 04 ... estimator (Bradford, 2002): k hijk k hijk c hij u y = å å (4) where chijk was the catch in tonnes ...

    Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 17–30 : Автор(ы): Webber, D.N. and S.J. Parker

  6. Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias

    1 Nov 16 1 Dec 16 1 Jan 16 1 Feb 16 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 0 10 20 30 40 50 60 ... 16 1 Feb 16 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 10 20 30 40 50 60 C ou nt Date A O n es t a ... 16 1 Jan 16 1 Feb 16 0. 0 0. 5 1. 0 1. 5 2. 0 0 20 40 60 80 10 0 Camera 2 16 1 Nov 16 1 ... Dec 16 1 Jan 16 1 Feb 16 0. 0 0. 5 1. 0 1. 5 2. 0 0 20 40 60 80 10 0 Camera 3 A du lt A ...

    Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Автор(ы): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery

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

    results are different. This is because the maximum likelihood estimator: (4) was used here, while ... maximum likelihood estimator of equation (4) has therefore been used instead, and provides comparability ... between [0, 0.5] and [2, 20] km, and too high in the complementary ranges. The fact that the X Z values ... of f and fobs in equations (10) and (11) above is not trivially resolvable. 4. CONCLUDING REMARKS ...

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

  8. On the intensity of sampling krill trawl catches

    120 100 90 80 70 60 50 40 30 20 10 30 35 i i i i i i i i i i i i i ... In t5 rr; 20 -' Z 4: 18 ~ ~ 16 w u 14 Z w c:;,: w u.. 12 u.. B w 10r 10 -' co ... least over the period considered. 33 4. DISCUSSION From the current results, the sample size of ... parameters may change with underlying variance in length of the popUlation concerned (see Figures 4 and 5 ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 29–48 : Автор(ы): Miller, D.G.M.

  9. A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey

    . 6 36 7. 0 48 .7 5. 4 12 2 61 .6 20 7. 7 12 .1 94 .6 1 8 7 –1 2 50 8 ... . 0 99 4. 7 99 .5 4. 9 43 6 06 .5 20 9. 2 4. 9 20 7. 98 8 8 –1 2 50 8 ... 7 –1 2 56 1. 4 20 6 04 .3 46 4. 1 2. 6 3 63 7 95 9. 7 81 .9 0. 8 1 29 ... 0. 40 8 7 –1 2 50 8. 0 99 4. 7 99 .5 4. 9 43 6 06 .5 20 9. 2 4. 9 ...

    Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 97–116 : Автор(ы): Heywood, B.G., A.S. Brierley and S.F. Gull

  10. Notes on the use of virtual population analysis for stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons

    stock size in 1990/91, all of these VPAs indicated that the biomass that year was dominated by 4 year ... a a (4) where la is the mean survey index at age a over all years and U a is the mean CPUE index ... only: _ Uay Aay --=-Ua Equation 4 assumes equal weighting between the two indices in years when ... ., for C. gunnari age 1 to 6+ this represents the mean of ages 1 to 4). The bottom row Fs for the MAFF ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Автор(ы): Parkes, G.

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