Résultats de la recherche

1. Diet of the Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (Subarea 88.1)

   licensed participants. Catch levels for an exploratory fi shery are also managed at a precautionary level ... - ing under an exploratory permit in the Ross Sea (Subarea 88.1) during two summer seasons (January ... in the previous year, the remainder were largely partly full (15% held traces of food, 20% held ... the category Crustacea for that year. Live amphipods and isopods were also found in a few stomachs ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 113–123 : Auteur(s): Fenaughty, J.M., D.W. Stevens and S.M. Hanchet

2. Fishing intensity of the Soviet fleet in krill fisheries in the southern Atlantic (Subareas 48.2 and 48.3)

   (Subareas 48.2 and 48.3) Abstract / Description:  This paper provides an assessment of the impact of the ... commercial fleet on the krill population in different months during the 1987 to 1990 fishing seasons within ... % of the total catch. The calculations were based on haul-by-haul data from the Soviet fleet, using a ... on the krill population – on biomass and the density of krill aggregated in the fishing grounds – was ... Antarctic ecosystem. Krill are dominant primary consumers and constitute an important food source for ... 20-year fi shing history, the precautionary catch limit had never been approached. Furthermore, the ... pre-exploitation biomass for that year or about 3% of the total allowable catch (SC-CAMLR, 2001 ... further. This makes an even stronger case for the estimated removal intensity being of minor importance ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 15–35 : Auteur(s): Kasatkina, S.M. and V.F. Ivanova

3. Do krill and salps compete? Contrary evidence from the krill fisheries

   clear relationship was observed in the Elephant Island area. Possible reasons for these phenomena are ... / Description:  Salp by-catch and krill discolouration ('green' krill) caused by active feeding on ... krill in the catches was evident when both salps and krill were taken together. In the Livingston Island ... Recently, an hypothesis of competition for primary production between salps and krill has been proposed ... salp densities is shown in Figure 5. The estimates for each area were standardised to February and an ... be active feeding grounds for krill, which effectively filters particles larger than 20 pm (Meyer ... salps, however, indicates an effect on availability of phytoplankton to krill. In the Elephant Island ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 205–216 : Auteur(s): Kawaguchi, S., T. Ichii, M. Naganobu and W.K. de la Mare

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

   1989/90 Abstract / Description:  A krill biomass census survey was carried out at two fishing grounds ... speed was 3.2 to 3.6 knots. The total krill stock on the poorly studied site off the South Sandwich ... been operating over an area of about 600 km2• The specific biomass reached its greatest level here (on ... census survey was carried out at two fishing grounds in the South Sandwich and South Orkney Islands ... other inadequately studied areas of its distribution. In this connection, an attempt was made to ... , a vast expanse surrounding the South Sandwich Islands consisting of two parts; the northern (55° to ...

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

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

   food availability factors may be responsible for krill concentration. On a traditional fishing ground ... Elephant Island. The main objective of the survey was to investigate the mechanisms responsible for the ... deployed at a level of 30 m from the surface because at this level krill concentrations are most frequently ... regarded as the lower level for this time of the season. From mid-February and onwards it was reported that ... levels (0, 10, 20, 30, 40, 50, 75, 100, 125, 150 and 200 m). Chl-a concentration was determined by ... , twelve locations per day were obtained for each buoy with an accuracy higher than several hundred metres ... . This study suggests two factors responsible for krill concentration. One is a convergent accumulation ... availability factors may be responsible for lain concentration. On a traditional lain fishing ground north 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

6. Directed research. Antarctic Marine Living Resources (AMLR). A program development plan

   research vessel capable of operating in Antarctic waters for a period of 180 days each year. Note: The full ... program providing information needed for US policy regarding the conservation and management of the marine ... in the Commission and Scientific Committee of the Convention for the Conservation of Antarctic Marine ... Living Resources (CCAMLR), which established the system for managing the living resources of the ... , was signed into law by President Reagan on November 8, 1984, implementing the CCAMLR for the United ... (AMLR) Program is a national program providing information needed for U.S. policy regarding the ... for the Conservation of Antarctic Marine Living Resources (CCAMLR), which established the system for ... AMLR Program, which emphasizes directed research undertaken for the express purpose of providing for ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 363-373 : Auteur(s): Office of Science and Technology, NMFS, NOAA, US Department of Commerce (USA)

7. Differentiation of independent populations of Antarctic krill

   :  Several countries have recently shown an interest in commercial krill fishing. An understanding of krill ... present, at least six stable cyclonic water circulations can be found and at least two or three of them ... may be habitats of independent krill sub-populations. A proposal is given for future studies into ... circulation. On the basis of the review, it is suggested that there is probably one composite population of E ... which two or three are large-scale (Beklemishev, 1969) and, consequently, may serve as habitats for ... -to-year and seasonal fluctuations ; 6. study of the causes of fluctuation 7. setting up of an ... INDEPENDENT POPDLATIONS OF ANTARCTIC KRILL D.S.S.R. Abstract Several countries have recently shown an ... interest in commercial krill fishing. An understanding of krill population structure is needed to ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 275-281 : Auteur(s): USSR

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

   krill biomass for the area. It was therefore only possible to begin to explain the reasons for the ... favourable for krill aggregations its biomass around South Georgia is approximately 400-800 thousand tonnes ... . Unfavourable conditions correspond to a biomass of an order of magnitude less. Short-term fluctuations of krill ... recent findings is discussed in this paper. There has been less focus on data concerning krill biomass ... noteworthy for its high abundance of krill. Two areas, located on the shelf and the outer part of the island ... seasons unfavourable conditions predominated for an extended period (Survey 5) and due to low biomass and ... create a foundation for identifying the type of change taking place. During the above years the low ... unsuccessful. On the whole this was responsible for the extremely low overall biomass assessment (54 000 ...

   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

9. A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship in Subarea 48.3

   . Toothfish were kept in tanks with seawater replacement for at least 12 hours after tagging. On one vessel ... , 396 animals were included, with an overall survivorship of 90%. Smaller animals and animals in better ... -tagging survivorship of 95% or more. An assumption of 90% post-tagging survivorship is a conservative ... in Subarea 48.3 Abstract / Description:  During the 2005 fishing season, experiments on the ... similar to the 96% assumed for longline-caught halibut in good condition (Kaimmer and Trumble, 1998). An ... seawater replacement for at least 12 hours after tagging. On one vessel, fish with a variety of injuries ... mark–recapture studies have been under way for several years around Heard Island, South Georgia, and ... toothfish are released on research cruises, fish are retained in tanks for several hours post-tagging to ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 279–289 : Auteur(s): Agnew, D.J., J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward, L. Jones, G. Breedt, S. Du Plessis, J. Van Heerdon and G. Moreno

10. Age, growth and size at sexual maturity of Macrourus carinatus caught as by-catch in Australian sub-Antarctic trawl fisheries

    from 156 Macrourus carinatus otolith samples collected during two research voyages to Heard and ... were no significant differences in growth parameters calculated for males and females. Von Bertalanffy ... growth parameters for both sexes combined were: L ∞ = 690 mm, K = 0.069 and t 0 =-2.4. The size at sexual ... ) and the length at first spawning (L m 50) was 511 mm (total length), for both sexes combined. The ... Ross Sea. 0 100 200 300 400 500 600 700 0 5 10 15 20 25 30 Age (years) To ta l l en gt h ... Dorsal Ventral van Wijk et al. 142 0 5 10 15 20 25 30 -500 -400 -300 -200 -100 0 100 200 300 ... corresponding to the upper end of each bin. 0 5 10 15 20 25 30 200 250 300 350 400 450 500 550 600 650 ... . Sections were cleaned with alcohol, immersed in resin on a glass slide, and cured at room temperature for ...

    Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 139–151 : Auteur(s): van Wijk, E.M., R. Williams and A.J. Constable

Pages