Résultats de la recherche

1. Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery

   close to the surface, the bait may be lost from sight (sink rates to, say, 0.5 m depth, which might ... -and-hook bearing 11.5 mm mother line with each end attached to 100 kg anchors, which were used to ... the end of the snoods on the mother line from the anchors. The anchors were attached to 18 mm ropes ... 1.2 m intervals along the mother line. Snood lines were 3 mm in diameter and 50 cm in length. Line ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Auteur(s): Robertson, G.G

2. Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands

   December 1990 to early February 1991. This increased krill density in early February 1991 (157 g/m 2) was ... early February 1991. This increased krin density in early February 1991 (157 g/m2) was 54% lower than ... Parsons, 1972). 2.2 Hydroacoustic Studies Hydroacoustic studies were carried out in order to determine ... King George Island, and was trapped by erratic oceanic eddies to the east of Elephant Island. This ... in the shelf area moved east, then reversed and was trapped in Barclay Bay on the northern side of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Auteur(s): Ichii, T., H. Ishii and M. Naganobu

3. Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels

   fishing operations the netting bags abrade on the seabed causing rocks to be lost and the weights to ... seabed causing rocks to be lost and the weights to become progressively lighter, requiring ongoing ... snag on the seabed, potentially reducing the amount of gear lost in benthic habitats. This paper ... Fuego is a 53.6 m Japanese-built (1972) tuna vessel con- verted to the Spanish system of fishing. In ... different sizes and shapes which are frequently lost from their netting enclosures. The number of weights ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Auteur(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon

4. Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region

   ). Abundance was higher during the post-spawning season 1984/85 with 3 795 x 109 krill and highest in early ... they are most abundant in early summer. Furthermore, other carnivorous zooplankton seem to feed ... cohort had died and it had been exposed to natural mortality only: M1% = - In (O.OI){fm (Tm as ... . 1979. Stratification and currents off Elephant Island in early February 1976. Meeresforsch.27: 75-87 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Auteur(s): Siegel, V.

5. Environment–krill relations in the South Georgia marine ecosystem

   result of large-scale changes in the physical environment. Mackintosh (1972) drew attention to the ... ). Mackintosh (1972) deve loped this theme and highlighted a correspondence between water temperature, sea ... of whale catches taken in the early part of the century (Everson, 1984). Whales feed predominantly ... ., 1942). Thus, the zonal air transport (east-west) corresponds to the meridional pressure gradient and ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 13–30 : Auteur(s): Fedoulov, P.P., E. Murphy and K.E. Shulgovsky

6. CCAMLR ecosystem monitoring and management: future work

   description). An early review of the program indicated that the results would vary in their value to ... from the models and/or assessments (Butterworth and Punt, 1999). An early attempt at dynamic ... account of uncertainties did not appear until the late 1980s and early 1990s. Three published modelling ... cult to resolve. For example, krill are known to move from west to east in the Scotia Sea (Hofmann ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 233–253 : Auteur(s): Constable, A.J

7. Acoustic data analysis and models of krill spatial distribution

   well as fish. Krill distribution is highly variable in space and time (Marr 1962), and krill often ... , 85 pp. MARR, J.W. 1962. The natural history and geography of Antarctic krill Euphausia superba ... water, while in a school the centre of mass is mobile relative to the water. Very little has been ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 311–329 : Auteur(s): Morin, A., A. Okubo and K. Kawasaki

8. CPUEs, body length and greenness of Antarctic krill during 1987/88 season in the fishing ground north of Livingston Island

   in this area were conducted from early January to late March 1988. It was in this area that RV Kaiyo ... from early January to late March as a case study to identify whether or not they show a marked change ... north of Livingston Island to the waters north of Elephant Island (Figure 2). From early February to ... difference in both catch/tow and catch/towing time among 10-day periods from early January to late March for ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 323–338 : Auteur(s): Endo, Y. and T. Ichii

9. Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia

   between months. Both species demonstrate an east to west migration throughout the season that is not ... species demonstrate an east to west migration throughout the season that is not related to the pattern of ... the cetaceans (by relocating the vessel) and replacing the lost catch. In addition, fishery managers ... show a more obvious east–west movement with interac- tions concentrated to the northeast during May ... in Shag Rocks during August. This east–west move- ment can also be seen in Figure 3 which shows the ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Auteur(s): Moir Clark, J. and D.J. Agnew

10. A simple approach for calculating the potential yield of krill from biomass survey results

    primarily in the late spring to early summer months. To ascertain whether this might have a marked effect ... -structure has been lost. (iv) In year y = 10 (the year before fishing commences), the a+ biomass is ... estimate Bo which is to be used in equation (1) is considered to be made in the middle of the season (Le ... .3) In the middle of the season during which the krin grow, their mass-at-age (w .) is then: wa ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Auteur(s): Butterworth, D.S., A.E. Punt and M. Basson

Pages