Résultats de la recherche

1. A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty

   ) 1.21 I 0 10 20 30 40 50 60 Length (mm) Selectivity (b) 1.6 1 1 0 2 4 6 Age (years) Relative ... 1 0.8 0.6 0.4 0.2 0 0 10 20 30 40 50 60 Length (mm) Proportion mature (b) 1.6 0 2 ... -exploitation spawning biomass at some time over the 20-year projection period is equal to 10%. + Values in ... Uncertainty (a) Run 1 Biomass (thousand tonnes) Recruits (millions) 0 10 20 30 40 50 Years (b) Run 2 ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Auteur(s): Constable, A. and W.K. de la Mare

2. Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3

   large factor (assumed here to be 4), declining to normal levels again when krill return. This paper ... dropping below 20% of its unexploited median level is 0.1; (ii) Rule 2: y2 is the catch level at which ... : Probability of stock biomass dropping below 20% of the unexploited median level over a 10-year period ... zero catches there is a substantial probability of depletion of the population below 20% of its ... situation where even under conditions of no exploitation the population often drops to less than 20% of ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Auteur(s): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes

3. Acoustic estimates of krill density at South Georgia, 1981 to 1998

   ) being of the order of 20%. Demer (1994) has shown that in addition to sampling variance, survey ... Acoustic surveys at South Georgia over the past 20 years suggest that krill density around the island ... . Initial results from a fine- resolution model of the Southern Ocean. EOS, Trans. Am. Geophys. Union, 72 ... krill Euphnt~sia superba, around South Georgia. ICES C, CM 1/22: 4 pp. Boyd, I.L. 1993. Pup ...

   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

4. Distribution of the Soviet krill fishing fleet in the South Orkneys area (Subarea 48.2) during 1989/90

   , South Orkneys, aggregations, drift, distribution, CCAMLR INTRODUCTION of which only 35 thousand tonnes ... 11-15 November 16-20 November 21-25 November 26-30 November Number of Vessels 2 2 2 ... (2,5 T/yaC). B TeqeHHe nOCneAHHX nXTH ~Hefi ~ 0 5 4 6 ~ ~ arperaqHX, COXpaHXBLUaXCX Ha npOTXXeHHH ... krill aggregation. Trawling velocity was about 3 to 4 knots in most cases. The trawl was lifted when ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 51–62 : Auteur(s): Sushin, V.A

5. Distribution and relative abundance of juvenile icefish (Champsocephalus gunnari) from a trawl survey of the South Georgia shelf in June–July 1985

   ) was employed. This trawl is made of kapron fibre netting with 20-45 mm mesh size with an inside ... -end indicated the occurrence of juvenile fish up to a depth of 500 m. - 60 - A 24-hour station ... 812.2 18 1928 107.1 16 183 11.4 13 482 37.0 - - - 4 0 0 1 6 6.0 Abundance indices for ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 55-63 : Auteur(s): Boronin, V.A., G.P. Zakharov and V.P. Shopov

6. Some thoughts on precautionary measures for the krill fishery

   spawning biomass dropping below 20% of its pre-exploitation median level over a 20-year harvesting period ... is 10%; and the median krill escapement1 in the spawning biomass over a 20-year period is 75% of ... 66 64 62 60 58 56 54 52 "W 59 Figure 1: CCAMLR Statistical Subareas 48.1,48.2 and 48.3. Shaded ... survey. Document WG-Krill-92/4. CCAMLR, Hobart Australia. Croxall, J.P. 1984. Seabirds. In: Laws, R.M ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 1–11 : Auteur(s): Everson, I. and W.K. de la Mare

7. Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?

   surface were evaluated to five target depths: 2, 3, 5, 10 and 20 m. Of these target depths, sink time to ... . Treatment Target depths (m) 0–2 0–3 0–5 0–10 0–20 With 7.9 12.1 20.4 38.6 76.9 Without 7.4 12.9 20.7 ... distances fall well within the 50–60 m aerial extent of streamer lines deployed from autoline vessels ... Setting direction Pair ‘A’ 4 3 2 1 4 3 2 1 111 ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Auteur(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith

8. Krill biomass assessment in Statistical Area 48 from the RV AtlantNIRO data - Autumn 1989/90

   600 S; 32° to 18°W) and southern (60° to 67°S; 20° to 18°W), was affected by different types of ... "Igla" attached to the top beam of the metal trawl rigging. The volume of flltered water was controlled ... 60 miles by latitude and longitude and during the second survey it was 30 miles by latitude and 40 ... ::. ' .. 60 61 62 6"3 65 66 ..,."."'" S 67 i ~O 50 100 500 tOOO 5000 ·f ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 115–121 : Auteur(s): Fedotov, A.C.

9. Distribution, biomass and characteristics of the Euphausia superba fishery around South Georgia (Subarea 48.3)

   swarms were distributed in the upper layer from 12 to 35 m. These differences were taken into ... -east of the island showed dense swarms (density up to 5.9 g/m3). 131 Survey 9 (20 January to 9 ... off South Georgia Island. Rybnoe Khoziaistvo, 9: 20-21. (In Russian). HEYWOOD, R.B., I. EVERSON and ... . Oceanology, 20: 295-300. (In Russian). MESLENNIKOV, V.V., E.V. SOLYANKIN, V.A. SPIRIOONOV and M.V. SYSOEVA ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 123–147 : Auteur(s): Latogursky, V.I., R.R. Makarov and L.G. Maklygin

10. Potential interactions between wandering albatrosses and longline fisheries for Patagonian toothfish at South Georgia

    , satellite-tracking, South Georgia, wandering albatross INTRODUCTION Over the last 20 years wandering ... . (1992). That is, about 40% of locations are accurate to within l km. The remaining 60% are of ... -May) we have a total of l 063 uplinks from 11 birds (7 males, 4 females), tracked for a total of 91 ... Figure 4. This fishery operates mainly over the edge of the continental shelf at depths of around 1 000 ...

    Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 101–110 : Auteur(s): Croxall, J.P. and P.A. Prince

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