Résultats de la recherche

1. Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000

   to operational difficulties, however, the period of trial fishing was shortened to two months ... approximately 80 cm height were constructed of a steel frame and covered with mesh. A collapsible funnel ... Viability and CPUE Analysis The first two aims of the toothfish pot fishery trial were to assess the ... isopod or amphipod damage (Table 2). These fish were generally large (mean size of 94 cm, 64% 90 cm or ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 93–105 : Auteur(s): Agnew, D.J., T.M. Daw, G.M. Pilling and M.G. Purves

2. 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

   (Spanish line and trotline), and only two vessels used trotline gear in the groomed dataset, one of which ... recommendations to improve gear loss reporting. Methods Data grooming Fishing years are assigned to the year in ... 88.2G 16 0° E 180° 160°W 140°W 120°W 80 °S 75 °S 70 °S 65 °S 60 °S 23 18 12 6 1 ... 80 °S 75 °S 70 °S 65 °S 60 °S 0.8 0.6 0.4 0.2 0.0 Figure 3: Spatial distribution of ...

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

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

   area the fish were sparsely distributed. Dense concentrations consisting predominantly of one myctophid ... surveyed in two stages. Firstly, the area from 51 °30' to 56°00'S and between 20°30' and 26°30'W was ... surveyed from 20 February to 2 March. Secondly, the area with coordinates 51°30' to 55°00'S and 8°00' to ... 18°30' (Figure 7) was surveyed from 20 March to 2 April. These sectors had areas of 52 600 square ... 47° and 56°S and between 8° and 44°W in the period 30 January to 10 April. The bulk of the biomass ...

   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

4. On the intensity of sampling krill trawl catches

   . The possible effect of two other factors (within-trawl variability and sample decomposition) which may ... be discerned (e.g., length-with-age). At present, and in the interests of both statistical rigour and ... 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 ... WG-KRILL-90/27 ON THE INTENSITY OF SAMPLING KRILL TRAWL ... -frequency distributions from commercial catches. The possible effect of two other factors (within-trawl ... 8012, South Africa 29 30 • l'examen des differences minimales de longueurs decelables d'une ...

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

5. Otolith and body size relationships in bigeye grenadier (Macrourus holotrachys) in CCAMLR Subarea 48.3

   grenadier, Subarea 48.3 0 10 20 30 40 50 60 70 80 90 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 ... equations of the fi tted lines are given in the text. 90 80 70 60 50 40 30 20 10 0 40 35 30 ... from Heard and Macquarie Islands. 0 10 20 30 40 50 60 70 80 90 10 12 14 16 18 20 22 Otolith ... Length (mm) Fi sh T ot al L en gt h (c m ) 90 80 70 60 50 40 30 20 10 0 Fi sh to ta ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 133–143 : Auteur(s): Morley, S. and M. Belchier

6. Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys

   two species in the diet of C. gunnari was reversed. The consumption of other prey items such as mysids ... well as fish, was only occasional or negligible and varied from year to year. The spatial distribution ... /without food in Subarea 48.3, did not show a consistent pattern from year to year.  Likewise, in the four ... and Thysanoessa sp., which are known to be important alternative food in years of krill scarcity, as ... : the dietary coefficient (Q%) showed a greater importance of T. gaudichaudii (75-80%) than krill (20 ... of the SG shelf (south of 54'55's) in February 1995 and in March/April 1997. At one station in this ... empty stomachs predominated in the north-western region of the SG shelf (around 54"05'S, 38"30'W in ... fish (ranges 12-20 cm/l-2 years) was found in the catches during the RV Dr Eduardo L. Holmberg ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Auteur(s): Barrera-Oro, E., R. Casaux and E. Marschoff

7. On the instantaneous natural mortality rate of Champsocephalus gunnari, South Georgia (Subarea 48.3)

   composition of catches from 1964/65 to 1968/69 and the age/length key for the first half of 1972 were used in ... . The following two procedures were used to calculate the age structure of the catches. The first ... : where nl a a1 a2 = = = number of fish aged a of length I in the key; minimum age of fish of ... Georgia Area (Subarea 48.3). WG-FSA-90/28. Hobart, Australia: CCAMLR. pp. 22. 319 Table 1: Age ... determined using two procedures for calculations. Age 1964/65 1966/67 1967/68 1968/69 1964-69 1964-69 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 313–326 : Auteur(s): Frolkina, G.A. and R.S. Dorovskikh

8. Use of indices of predator status and performance in CCAMLR fishery management

   of likely operational constraints on fisheries. File:  20-Croxall.pdf ... last year and with average(s) of previous years. Determine level of statistical significance of ... situation within two to three decades (as required by Article 11 of the Convention). We should also ... environment, evidence for short-term changes (year-to-year differences or trends over three to five years ... Management Strategies? I believe that there are at least two main reasons for doing this. First, in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 353–365 : Auteur(s): Croxall, J.P.

9. Age determination of Champsocephalus gunnari Lönnberg, 1905 (Channichthyidae) taken in the South Georgia area in 1990

   -26 and 30-34 cm. Only vertebra samples (n =140) were used in age determination. Age groups from 1+ to ... USSR conducted two research cruises using the vessels RV Hill Cove and RV Akademik Knipovich to study ... 9+ were present in catches. Two peaks in size composition correspond with fish of the 1987 and 1985 ... /86 year classes. The first small peak corresponds with the strong 1988 year class. File:  17 ... WG-FSA-90/33 AGE DETERMINATION OF CHAMPSOCEPHALUS ... =140) were used in age determination. Age groups from 1 + to 9+ were present in catches. Two peaks in ... Knipovich). Two fish age-reading structures (otoliths and vertebrae), to be used in determining the age ... . Yearly growth marks in vertebrae preparations for the age groups observed usually appear as two dark ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 285–293 : Auteur(s): Kochkin, P.N.

10. Krill (Euphausia superba Dana) resources and distribution in the Wilkes Land area in the seasons 1986 to 1989

    mainly focused on the search for exploitable krill aggregations. Two research vessels were simultaneously ... involved in the survey with one vessel conducting commercial krill fishing. The whole survey area from the ... coast to approximately 64°S between 130° and 150°E was subdivided into three subareas taking into ... for Fisheries 3 The annual period used is the split-year 1 July to 30 June. Split-year is denoted by ... 1986 50 12.2 1000 50.0 20 to 21 April 3 1986 300 3.5 158 47.5 24 to 30 April 4 1987 127 14.0 1510 ... 65°30'S. The location of areas where krill aggregations were observed is shown in Figures 2 to 4 ... of 2. Krill aggregations were mostregularly observed between 64°30'-65°33'S, and 131°30'-133°oo'E ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 149–162 : Auteur(s): Dolzhenkov, V.N. and V.P.Timonin

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