Résultats de la recherche
-
Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation
study, the SDWBA TS pattern and frequency response behaviours at standard survey frequencies and animal ... the distribution of animal orientations. Due to the high variability of TS to realistic changes in ... 1 15 1. 15 0. 29 3 0. 36 2 20 1. 2 0. 31 9 0. 39 4 30 1. 3 0. 37 4 0 ... ) and standard deviation (5, 10, 20 and 30 degrees) of the Gaussian distribution of orientation. It ... and animal lengths are explored via a sensitivity analysis of some important parameters: number of ... seawater and the distribution of animal orientations. Due to the high variability of TS to realistic ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Auteur(s): Calise, L. and G. Skaret
-
Comparison of age readings from scales and otoliths of the Patagonian toothfish (Dissostichus eleginoides) from South Georgia
24 years. This is very close to the maximum age of 22.8 years calculated from Taylor's formulae ... de Taylor qui met en rapport l'age maximum observe et la mortalite naturelle. Dans ce cas nous avons ... AND METHODS Age 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2 1 22 23 ... soaked for one week in a solution of 20% alcohol (96"), 5% glycerin, a few drops of domestic detergent ... not be validated because the samples had not been continuously collected over the year and also ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 191–203 : Auteur(s): Cassia, M.C
-
Management and uncertainty: the example of South Georgia
in the 1980 year-class (paragraph 20 of the report). - 346 - Accepting that the decline in ... present M=O.ll, F=0.65. Annual recruitment, as numbers at 3 years old, has fallen from some 20 ... ages over 10 years and 19% over 20 years. The short lived fish were mostly small fish like anchovy ... , and the small numbers from the 1966 to 1969 year-classes observed in later years would not be ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Auteur(s): Gulland, J.A.
-
Acoustic estimates of krill density at South Georgia, 1981 to 1998
from year to year over that time, ranging from ≈ 2 to ≈ 150 g m-2 (fresh mass). The 1982, 1991 and ... years; by convention the year given refers to the year in which the season ended) BAS has conducted ... years ,90' ,982 ,9i5 ,pB ,9+ ,9s6 $6' 40% ,989 ,99' ,992 ,9@ ,9qb ,9qb ,9q6 ,992 49% Year Figure 2 ... given year is less than p - o for all years, then the year in Acoustic estimates of krill density ... ), four years exhibited greater density in the east. The year deviating from this pattern, 1994, was ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Auteur(s): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson
-
A fine-scale model of the overlap between penguin foraging demands and the krill fishery in the South Shetland Islands and Antarctic Peninsula
analysis, mean foraging distance for chinstrap penguins was increased by 50% (from 20 to 30 km), although ... alimentaires des manchots combinees avec la position des captures. L'analyse met en evidence le fait que le ... of shore-based penguin breeding colonies each year. December to March is the peak breeding period ... colonies out to 80, 60 and 20 km (Adklie penguins, chinstrap penguins and gentoo penguins respectively ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 99–110 : Auteur(s): Agnew, D.J. and G. Phegan
-
An assessment of toothfish in Subarea 48.3 using CASAL
spawning take place, lasted from 1 May to 31 August. The remainder of the year (1 September to 30 ... years refer to the fishing season that started in December prior to the year quoted. For example, year ... l and year y, the CV-at-length across years (cvl) of the proportions-at-length can be estimated by ... 1990 because the Russian fleet fishing in this year did not report haul-by-haul data to CCAMLR. Mark ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 65–95 : Auteur(s): Hillary, R.M., G.P. Kirkwood and D.J. Agnew
-
Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs-Kidd midwater trawl
" 50" 45" 40" 35" 30" Figure 4: Krill diskibution (g/ l 000 m3) in strata 0 to 100 m, 20 January to ... currents (relative to the 1 000 dbar), 20 January to 9 March 1988. 60" 55" 50" 45" 40" 35" 30" Figure 7 ... needed to obtain such material. Previous surveys carried out annually over nearly 20 years covered only ... December 1984 20 January-9 March 1988 Vessel RV Argus RV Evrika RV Evrika No. of Stations 177 ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 59–70 : Auteur(s): Sushin, V.A. and K.E. Shulgovsky
-
An overview of Southern Ocean zooplankton data: abundance, biomass, feeding and functional relationships (submitted to the 2008 Joint CCAMLR-IWC Workshop)
for differences in the extent of identification of early larval stages. Likewise, the time of year ... , since mesozooplankton typically remove <30% of primary production. This emphasises the dominant role ... one-half of those above. A change in the view of SO copepods in the last 20 years has followed an ... the extent of identification of early larval stages. Likewise, the time of year, depth of sampling ... typically remove <30% of primary production. This emphasises the dominant role of microbial food chains ... -year history of active research on Southern Ocean (SO) zooplankton, several thousand papers have ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 171–218 : Auteur(s): A. Atkinson, P. Ward, B.P.V. Hunt, E.A. Pakhomov and G.W. Hosie
-
Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
) and 120–135 cm (D). Values are mean ± SD. 70 60 50 40 30 20 10 0 % c om po si tio n ... OCT Octopodidae Octopus 10 0 20 0 30 SZT Pogonophryne scotti Plunderfish 25 0 0 3 28 PRA Pasiphaea ... . 0 ± 0. 7 C 18 :1 n9 c 20 .2 19 .5 ± 6 .4 21 .7 ± 0 .3 14 .1 30 .1 ± 2 .8 ... Science, Vol. 20 (2013): 21–36 21 FATTY ACID AND STABLE ISOTOPE ANALYSES TO INFER DIET OF ANTARCTIC ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Auteur(s): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
-
Estimating optimal observer coverage in the Antarctic krill fishery
on board for about 30% of that season. They have achieved a rate of krill sampling equivalent to 18 ... vessels sampled each season, 20% of total season hauls sampled for krill and an equivalent or higher ... . The South Georgia data suggest that such strategies should be pursued for at least four years before ... krill fishery • a target coverage rate of >50% of vessels each year; • a target of >20% of hauls set ... (% ) T ot al h au ls w it h kr ill sa m pl in g (% ) A ca m ar 20 02 30 7 ... 05 46 3 22 4 13 7 61 56 30 41 12 Fe ol en t 20 05 43 1 43 6 32 6 ... 75 78 76 24 18 A tl an ti c N av ig at or 20 05 30 3 54 40 74 ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 139–154 : Auteur(s): Agnew, D.J., P. Grove, T. Peatman, R. Burn and C.T.T. Edwards