Résultats de la recherche
-
Progress towards a trophic model of the ecosystem of the Ross Sea, Antarctica, for investigating effects of the Antarctic toothfish fishery
Ross Sea is a low primary production system, with production being localised in space and time. In the ... considered a work in progress. Overall, the model is close to balance, with total exports of organic carbon ... balanced, due in part to limited information on diet fractions of Ross Sea organisms. Methods to adjust ... considerable predation pressure on some species of demersal fish. The significance of toothfish in the diets of ...
Meeting Document : WG-EMM-06/14 : Auteur(s): M. Pinkerton, S. Hanchet and J. Bradford-Grieve (New Zealand)
-
On the problem of diurnal migrations of some fish species on the South Georgia shelf (Subarea 48.3)
substantial variations in middle size fry of both species were found at different depth levels during 24-hour ... Abstract: The results of experiments on the South Georgia Shelf carried out in the period of 1986 ... was the most distinctive in Ch.gunnari fry. The individuals used to ascend towards the water column ... individuals were found in the pre-bottom layer by day, being presented their small quantities in the water ...
Meeting Document : WG-FSA-99/64 : Auteur(s): I.A. Trunov, J.A. Frolkina and M.P. Konstantinova (Russia)
-
Network characterisation of the food-web of the Ross Sea, Antarctica
pronounced peak in biomass in the lower-middle part of the food-web, a result of high biomass of ... toothfish (Dissostichus mawsoni) in the region. We evaluate: (1) biomass and flow of organic matter by ... , i.e. the whole Ross Sea shelf and slope area, averaged over a typical year, and in 35 trophic groups ... the total living biomass in the Ross Sea (bacteria excluded). The six groups with the highest ‘indices ...
Meeting Document : WG-EMM-12/53 : Auteur(s): M.H. Pinkerton and J.M. Bradford-Grieve (New Zealand)
-
CEMP indices: 2007 update
, but were lost in a fire onboard the icebreaker Irizar. The development of an ordination method, with ... indicator species collected by standard methods in the three Integrated Study Regions of the Convention Area ... anomalies in these data. This report covers predator indices only. Data were submitted by 8 Members for 10 ...
Meeting Document : WG-EMM-07/04 : Auteur(s): Secretariat
-
On the problem of icefish (Champsocephalus gunnari) vertical migration on the South Georgia shelf
the maximum catches were available at the middle of the light hours of the day. At twilight the fish ...
Meeting Document : WG-FSA-91/06 : Auteur(s): J.A. Frolkina and V.I. Shlibanov (USSR)
-
Acquiring a ‘base datum of normality’ for a marine ecosystem: the Ross Sea, Antarctica
processes in a system where both top-down and bottom-up forcing are still intact. Elsewhere in Earth’s ... researchers who currently investigate open-ocean systems. Herein, the importance of top-down forcing in ... pelagic and neritic marine ecosystems is reviewed with concrete evidence given for its existence in the ... current functioning of the RSShelfE. In spite of this unique evidence for the Antarctic region, much ...
Meeting Document : WG-EMM-04/20 : Auteur(s): D. Ainley (USA)
-
The composition and origin of marine debris stranded on the shores of subantarctic Macquarie Island
an eight week period in 1988 to determine types, quantities, and possible sources of marine debris ... . Lost fishing gear consisted of buoys, ropes, and net fragments. Gear from both trawling and longline ... plastic bottles, and small pieces of expanded polystyrene were common. Litter accumulated in highest ... those reported for islands in the South Atlantic Ocean and the Indian Ocean, or from the coast of Alaska ...
Meeting Document : CCAMLR-VIII/BG/10 : Auteur(s): D.J. Slip and H.R. Burton (Australia)
-
Beach debris survey – Main Bay, Bird Island, South Georgia, 2003/04
represents an increase of 97% on the 183 items recorded in 2002/03 and the highest levels of summer beach ... miscellaneous items; the largest annual amount of this type of debris since the surveys began in 1990. For the ... first time no nylon line was recorded compared to a peak of 546 items in 1995/96. However, 11 plastic ... pieces), indicating that debris is still being lost by vessels into the marine environment. Therefore ...
Meeting Document : SC-CAMLR-XXIV/BG/15 : Auteur(s): Delegation of the United Kingdom
-
Brief report on scientific observation on the fishery vessel Simeiz (FAO Statistical Area 41, November 2006 to March 2007)
Abstract: Scientific observation was conducted in the commercial trip on the ling-liner «Simeiz ... », operating under the Ukrainian flag, in the south-western Atlantic Ocean outside the exclusive (marine ... ) economic zones of the foreign states (FAO statistical area 41) in the period from November, 7, 2006 till ... exceed 500 kg per a long-line set. Substantial differences were noted neither in size composition nor in ...
Meeting Document : WG-FSA-07/11 : Auteur(s): A.K. Zaytsev (Ukraine)
-
Analysis of sea-ice concentration of 48.6_4 and _5 with remote sensing data during the latest four seasons
sea-ice disappeared in the eastern part of the block in February 21st after she left. The sea-ice was ... becoming thick around whole block in March 11th, but disappeared in the eastern part of the block again in ... trace in 2015/16 season (the detailed trace will be presented at the PowerPoint slide in the WG-SAM-16 ... lowest in 2016, and Japan and South Africa vessels has conducted fishing operation as they scheduled and ...
Meeting Document : WG-SAM-16/42 Rev. 1 : Auteur(s): T. Namba, K. Taki and T. Ichii