Search results
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A preliminary assessment of age and growth of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea, Antarctica
-growing with a moderate longevity; the maximum estimated age was 14.3 years. Von Bertalanffy parameters ... derived for both sexes combined are: L ∞ 22.1 cm SL; K 0.167 y –1; t 0 –0.4 years. Parameter estimates ... –11.0 and 15.1–15.5 cm. Mean lengths of 4.9 and 7.3 cm (at ages 1.3 and 2.3 years respectively ... 6 to 9 years. File: 05sutton-horn.pdf ... sampled from the Ross Sea. 0 10 20 30 40 50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Age (years) Fr eq ... ue nc y Age (years) Fr eq ue nc y 50 40 30 20 10 ... on board and again after one year stored frozen at –20°C did not differ in length. Von Bertalanffy ... for small juveniles, to 33 years for the largest individual (20.5 cm SL). The L∞ value for both sexes com ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 75–86 : Author(s): Sutton, C.P. and P.L. Horn
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An assessment of the merits of length and weight measurements of Antarctic krill Euphausia superba
in the precision of prediction. Surprisingly, the stage of the moult cycle of the animal has little effect upon ... . Surprisingly, the stage of the moult cycle of the animal has little effect upon length-weight relationships ... of prediction. Surprisingly, the stage of the moult cycle of the animal has little effect upon length-weight ... Universitat Kiel, Dusternbrooker Weg 20, 2300 Kiel, Federal Republic of Germany. Les relations publiees des ... cycle de la mue de l'animal a peu d'effet sur les relations longueur-poids. Par contre, l'utilisation ... del ciclo de muda del animal tiene poco efecto sobre las correlaciones de talla-peso. El uso de las ...
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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An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data
Dissostichus spp. du banc BANZARE (division 58.4.3b de la CCAMLR). Cet article présente un résumé des données ... of highly concentrated effort and a third area of less con- centrated effort, together accounting for 80 ... % of all effort within a combined area of 53 000 km2 over the life of the fishery. Together ... in 2003/04, 49 (2.4%) were excluded from analysis due to missing data. Of these, 20 events had no data ... (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data Abstract / Description: In 2006, the ... biological data submitted by scientific observers on board vessels in the fishery. Results of a Leslie ... of toothfish at the scale of individual fishing grounds in the 2004/05 and 2005/06 seasons. This ... inconsistencies are noted between historical data and those submitted in the 2006/07 season, with Patagonian ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 55–78 : Author(s): McKinlay, J.P., D.C. Welsford, A.J. Constable and G.B. Nowara
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Observation of seabirds in the Southern Ocean in 1988/89
:00, 16:00 and 20:00 ship-time, while sailing between Antarctic stations and while en route to ports ... at 8:00; 12:00, 16:00 and 20:00 ship-time, while sailing between Antarctic stations and while en route ... .) o6RacTH IO)l{Horo OKeaHa. Ha6RIO,l\eHH5I, no 30 MHH. Ka)l{,l\oe, BbInORH5IRHCb e)l{e,l\HeBHO B CBeTRoe ... S. Thirty minute observations were made daily during daylight hours at 8:00; 12:00,16:00 and 20:00 ship ... effectuees, a la lumiere du jour, a 8hOO, 12hOO, 16hOO et 20hOO, heure du bord, en naviguant entre les ... BpeM5I CYTOK 8, 12, 16, 20 qaCOB no CY,l\OBOMY BpeMeHH, BO BpeM.5I nepeXO,l\OB cY,l\Ha Me ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 521–542 : Author(s): Vagin, A.V. and V.V. Popov
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Target strengths of krill at 136 and 20 kHz
Paper Title: Target strengths of krill at 136 and 20 kHz Abstract / Description: Estimation ... the mean single-krill target strengths range from-71 to-77 dB at 20 kHz. Trawl hydroacoustic method ... Target strengths of krill at 136 and 20 kHz ... lengths from 43 to 47 mm the mean single-krill target strengths range from -71 to -77 dB at 20 kHz. Trawl ... : • frequency 20 kHz: aluminium, diameter 120 mm, TS = -30.92 dB • frequency 30 kHz: brass, diameter 100 mm, TS ... :20 1.3 -74.3 -75.4 53.9 3.9 1.19 20:30 0.14 -77.5 -69.0 54.2 5.7 1.23 Maude Rise area (February ... Encaged krill 136 TS = 0.39L - 86.50 (4) 0.87 Encaged krill 20 TS = 1.27L - 131.30 (5) 0.84 Trawl ... % 24 21 18 15 I2 . 9 6 3 0 10 20 30 40- 50 Figure 1. Krilllength composition. South ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Author(s): Kasatkina, S.M.
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Maximum entropy reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia, 1996–2000
to be exploited together with new known data (Sivia, 1996). Furthermore, Skilling (1988) has shown ... successfully for many years in numerous branches of physical science to reconstruct images from incomplete ... ( 19 98 ), JR 38 ( 19 99 ) an d A T L D ( 20 00 ). A xe s ar e la be lle ... there are some very large differences in mean krill density between years (ranging from 36 to 12 ... line-transect acoustic survey data gathered in the boxes during austral summers from 1996 to 2000 ... 80 km transects in each box, providing about 1 600 density estimates per box. The MaxEnt technique ... × 0.5 km cells in each box, taking explicit account of the spatial relationship between densities in the ... observed data. Despite some very large interannual and regional differences in mean krill density, the ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 91–100 : Author(s): Wafy, M.H., A.S. Brierley, S.F. Gull and J.L. Watkins
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Growth and age/length structure of populations of Notothenia (Lepidonotothen) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean
in this paper. It was found that during the first years of life the linear growth rate is 3 to 5 cm per year ... . It decreases by a maximum of 1 cm during the last years of life. Maximum annual weight increments of 100 to 120 ... in this paper. It was found that during the first years of life the linear growth rate is 3 to 5 cm per year ... . It decreases by a maximum of 1 cm during the last years of life. Maximum annual weight increments of 100 to 120 ... - 9.3 13.4 17.1 20.5 23.5 26.2 28.7 30.9 32.9 34.8 36.4 37.9 Males - 8.7 13.3 17.4 20.9 24.1 26.9 29.4 ... of different age. 132 2500 2000 0> 1500 'I 'I 'I 1000 500 fO 20 30 Y Y 'I 40 ... to 1972; 2=1980 to 1986. 133 30 20 f978 n=770 t=7,5 fa 20 (979 n=2327 fa 20 1980 (1;5426 ... 10 '-ID 1986 n=68S9 t=8,O 3D 20 to ItO 30 1987 rt=6223 t=7,8 20 fO 8 12 f6 20 24 28 32 36 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 123–139 : Author(s): Zaitsev, A.K.
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Beyond MSY: a consideration of definitions of management objectives
in Article II of the CCAMLR Convention. The criteria will depend on whether the main concern ... out in Article II of the CCAMLR Convention. The criteria will depend on whether the main concern ... realistic population models, taking account of the objectives set out in Article 11 of the CCAMLR ... a l'Article II de la convention de la CCAMLR. Les criteres varieront selon que l'interet principal portera ... and industry. In later years it has come under increasing criticism. Economists have felt that it does ... thought of in two parts. For the first few months or years of life, as eggs, larvae or juveniles ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 299-322 : Author(s): Gulland, J.A.
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Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels
% in the presence of killer whales, 12.1% by sperm whales, and 42.5% when both species were present together ... present together. An extensive photo-identifi cation effort, primarily focussing on killer whales, allowed ... (n = 552, range 1–20) and 4.1 ± 3.4 (n = 737, range 1–30) individuals respectively. Table 1: Number ... in the Crozet EEZ per fi shing sector and marine mammal species. 0% 10% 20% 30% 40% 50% 60% 70% 80% 90 ... % 50% 40% 30% 20% 10% 0% 11 12 13 14 ... 20 25 30 2 3 4 5 6 7 8 9 10 11 12 13 14 20 21 23 no of observation fr eq ue nc ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Author(s): Roche, C., C. Guinet, N. Gasco and G. Duhamel
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Information on the status of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in the lower South Shetland Islands, derived from the 2000–2006 monitoring program at Potter Cove
period of 24 years which began in 1983, and at Harmony Cove in the summers of 2001to 2003. The decline ... has continued at Potter Cove from 2000 to 2006, extending a continuous sampling period of 24 years ... of freedom Mean square F P (a) Notothenia rossii, total catches Years 19.8835 20 0.994173 14.6162 <0.00001 ... Error 59.3803 873 0.068019 (b) Gobionotothen gibberifrons, total catches Years 9.8124 20 0.49062 ... 42.9468 <0.00001 Error 9.9731 873 0.01142 (c) Notothenia coriiceps, total catches Years 32.4684 20 ... , relative catches Years 14296.5242 20 714.826 21.3430 <0.00001 Error 28033.11 837 33.49237 Figure ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 83–87 : Author(s): Barrera-Oro, E.R. and E.R. Marschoff