Résultats de la recherche

1. Analysis and modelling of the Soviet Southern Ocean krill fleet

   biomass be detected? The krill distributional model begins with individual krill which are assumed to ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 127–235 : Auteur(s): Mangel, M.

2. Size and density of krill layers fished by a Japanese trawler in the waters north of Livingston Island in January 1988

   information on the layers fished by a Japanese trawler during the co-operative survey with RV Kaiyo Maru on ... layer length ranged from 241 m to 6.0 km with a mean of 3.25 km (N=38, SO=1.66 km) (Figure 3a). The ... intersected length of six swarms encountered in a tow ranged from 37 to 370 m with a mean of 135.8 m (SO ... =122.5 m). The mean thickness of the layer(s) of each tow ranged from 6.1 to 22.8 m with the overall ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 339–345 : Auteur(s): Endo, Y. and Y. Shimadzu

3. Response to Everson (2008)

   krill in the southwest Atlantic has been estimated as 109.4 million tonnes with a standard deviation ... wrong’ with either or both methods, and has implied that since, in his opinion, the MaxEnt approach is ... is) the fault must lie with the MaxEnt approach. The two methods are however quite different ... to the total stratum area. For a single survey stratum, the mean density is determined with the ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 195–198 : Auteur(s): Brierley, A.S., B.G. Heywood and S.F. Gull

4. Estimating confidence intervals for fish stock abundance estimates from trawl surveys

   -statistics, as a basis for confidence interval estimation, to species with patchy distributions, such as ... distribution with one degree of freedom, at the a probability level. An asymptotic confidence interval for ... maximising the log-likelihood over k - 1 of the stratum biomasses, with the remaining value fixed as ... maximising the log-likelihood function for close to the nominal percentage of coverage, with each trial ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 203–207 : Auteur(s): de la Mare, W.K

5. Determination of Antarctic krill acoustic back-scattering cross-section

   -directional antenna is determined by expression With where em d A 1(7Td)2 e2 2" X- . m maximum ... /Palm, = 20 103 • The echo signal level was determined with the help of an osciiograph which was ... were made using an Isaacs Kidd and RT/TM, 36.6 trawls. Amplitudes of echo signals with the vessel ... following equation holds : TS = 2.1 Lk - 72.3 (dB) (13) with correlation coefficient K 0.96 The Polish ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 141-152 : Auteur(s): Protaschuk, V.A. and T.A. Lukashova

6. Trends in population size and breeding success at colonies of macaroni and rockhopper penguins, Marion Island, 1979/80–1995/96

   . Elsewhere, their breeding schedule varies only slightly from year to year (Marchant and Higgins, 1990 ... overall decreases in the number of clutches laid at all three colonies monitored, with considerable ... Hole, trends in chick survival were closely matched up until 1994/95, with major divergence observed ... at the onset of, breeding. The same does not appear to be the case for macaroni penguins. With the ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 89–103 : Auteur(s): Cooper, J., A.C. Wolfaardt and R.J.M. Crawford

7. Choosing distance between acoustic survey tacks

   with the lowest expenditure. Since the error in biomass assessment depends on the variability of ... assessment error and the tack frequency when surveying density fields with different * The variation ... series of surveys with different distances between tacks was simulated for each field of density ... r calculated by formula (1), the biomass assessment error does not, with 95% probability, exceed ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 153-164 : Auteur(s): Kalikhman, I.L., Z.I. Kizner, B.R. Zaripov and W.D. Tesler

8. The use of analysis of penguin stomach contents in simultaneous study of prey and predator parameters

   diferentes niveles de digesti6n. A study of penguin diet conducted simultaneously with monitoring prey ... season). Sampling of krill introduces the problem of net selectivity which, together with krill swarming ... behaviour, makes it extremely difficult to ensure that the area of sampling coincides accurately with the ... classified in accordance with the day of the week of collection (e.g. Monday, Tuesday, etc.). The resulting ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 367–375 : Auteur(s): Marschoff, E. and B. González

9. Homogeneity of body length composition of Antarctic krill within the commercial zone

   of X2 exceeded the critical value of X2 with (m-I) (k-l) degrees of freedom, Ho was rejected. This ... test is not really suitable for DU smaller than 5. Therefore length classes with DUwith ... proportion of large and small size classes often varied between sequential hauls with the length modes being ... adjacent classes to increases DU to 5 or larger. 3 . RESULTS AND DISCUSSION Results for each haul are ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 17–28 : Auteur(s): Ichii, T.

10. Biomass of myctophids in the Atlantic sector of the Southern Ocean as estimated by acoustic surveys

    trawl with a small-meshed insertion (12 mm mesh) in a trawl bag was used. 418 Mesh density of ... of their biomass as compared with results of control trawlings (coefficient of trawl catchability ... concentrations of myctophids as long bands or spots (isolated schools) with a height of up to 30 m (Figures 1 ... myctophids, with E. carlsbergi accounting for about 85%. Besides this species, G. nicholsi, Krefftichthys ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 417–431 : Auteur(s): Filin, A.A., K.V. Gorchinsky and V.M. Kiseleva