Résultats de la recherche
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Acoustic estimates of krill density at South Georgia, December/January 1998/99
north-west and north-east of South Georgia during December/January 1998/99 were used to estimate mean ... krill density there. Densities (east = 11.1 g m-2, west = 12.0 g m-2) were towards the lower end of the ... range observed over the past two decades, but not abnonnally low, and comprised almost entirely of large ... estimates of krill density at South Georgia, December/January 1998/99 Approval: Approved ...
Meeting Document : WG-EMM-99/20 : Auteur(s): A.S. Brierley and C. Goss (United Kingdom)
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Acoustic data analysis and models of krill spatial distribution
Paper Title: Acoustic data analysis and models of krill spatial distribution Abstract ... descriptors of krill spatial aggregation: power spectra for krill biomass fluctuations in space, semivariogram ... (spatial autocorrelation of krill biomass) and the frequency distribution of krill biomass estimate. The ... wavenumber spectrum resembles a white noise at scales of 2-20 km, although at scales smaller than 1 km the ... , 85 pp. MARR, J.W. 1962. The natural history and geography of Antarctic krill Euphausia superba ... OF KRILL SPATIAL DISTRIBUTION A. Morin, A. Okubo and K. Kawasaki Abstract Acoustic data ... obtained on 4-5 January 1987 aboard the RN ProfesSor Siedlecki were used in three descriptors of krill ... autocorrelation of krill biomass) and the frequency distribution of krill biomass estimate. The wavenumber ...
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
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Bacteria and detritus: Trophic modelling of the Ross Sea
. Bradford-Grieve and S.M. Hanchet. 2010. A balanced model of the food web of the Ross Sea, Antarctica ... of animals that have died for reasons other than predation (including disease, starvation, excess ... -parasite load), as well as parts of animals that died due to predation but were not consumed at the time ... autumn just after the diatom pulse. It is thought that this pulse represents the die-out of this ... modelling of the Ross Sea M.H. Pinkerton, J. Bradford-Grieve National Institute of Water and ...
Document : Site Section: Publications
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The effect of different methodologies used in penguin diet studies at three US AMLR predator research sites: Admiralty Bay, Palmer Station and Cape Shirreff
Abstract: Diet studies are a key component of the CCAMLR predator monitoring program as they ... provide direct assessments of the prey types and amounts of import to predators, which, in turn, are ... hypothesized to influence variability in related parameters such as breeding success, foraging trip durations ... and chick fledging weights. Given the importance and interdependence of diet studies to monitoring ...
Meeting Document : WG-EMM-99/46 : Auteur(s): W. Trivelpiece, S. Trivelpiece (USA) and K. Salwicka (Poland)
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Patterns and processes in the distribution and dynamics of Antarctic krill
spatially variable growth rates of krill, krill loss rates due to predators, density-dependent attraction of ... Abstract: A general framework is presented to develop, test and integrate component models of the ... distribution and dynamics of Antarctic krill population at various spatial and temporal scales. We suggest that ... models of increasing complexity be developed iteratively for variability and patchiness of krill ...
Meeting Document : SC-CAMLR-VII/BG/20 : Auteur(s): United States of America
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Diving location and depth of breeding chinstrap penguins during incubation and chick-rearing period in King George Island, Antarctica
Island, Antarctica, diving characteristics of breeding chinstrap penguin parents were recorded by ... short trip hours during chick-rearing period. In addition, chinstrap penguins exhibited deeper dive ... need of chick-feeding and the temporal changes in prey availability between the two reproduction stages ... depth of breeding chinstrap penguins during incubation and chick-rearing period in King George Island ...
Meeting Document : WG-EMM-17/P01 : Auteur(s): W.Y. Lee, S. Park, N. Choi, K.W. Kim, H. Chung and J.-H. Kim
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On the accuracy of the pellet analysis method to estimate the food intake in the Antarctic shag Phalacrocorax bransfieldensis
Abstract: The accuracy of correction factors estimated to compensate the digestion and loss ... through the gastrointestinal tract of the otoliths of fish represented in pellets of the Antarctic Shag ... Phalacrocorax bransfieldensis was tested at two localities of the South Shetland Islands. F or such purpose, the ... results from the analysis of 226 and 115 pellets collected at Harmony Point and at Duthoit Point ...
Meeting Document : WG-EMM-97/61 : Auteur(s): Casaux, R.
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A summary of the commercial fishery for mackerel icefish Champsocephalus gunnari in Subarea 48.3 during the 1997/98 season
days between 25 December 1997 and 5 January 1998. The total catch of C. gunnari was 5.04 tonnes in 34 ... hauls. 67% of this catch was taken in just two hauls, confirming the patchy distribution of this species ... . Most of the catch was made up of fish between 22 and 30 cm long. Fish of this size range have ... previously been shown to be ages two and three. The catch of species other than C. gunnari amounted to only ...
Meeting Document : WG-FSA-98/53 : Auteur(s): G. Parkes, A. King and C. Jones (United Kingdom)
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Diet and prey consumption of Antarctic petrels Thalassoica antarctica at Svarthamaren, Dronning Maud Land and at sea outside the colony
Abstract: The diet of the Antarctic petrel Thalassoica antarctica was studied during two years at ... found in other diet studies. Estimates of food consumption for birds breeding at Svarthamaren (c ... . 250,000 pairs) indicate that the take approximately 6,600 tons of Crustaceans, 2,600 tons of fish and 485 ... tons of squid during the breeding season. Furthermore, their annual consumption is estimated to 34,800 ...
Meeting Document : WG-EMM-97/58 : Auteur(s): Røv, N., Lorentsen, S., Klages, N.
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Population numbers of fur seals at Prince Edward Island, Southern Ocean
south-east coast of the island; the first a mixed (with Subantarctic fur seals) breeding colony with an ... Abstract: During the period 17–22 December 2001, the onshore distribution and the abundance of ... Prince Edward Island (46°38´S, 37°57´E). Two breeding colonies of Antarctic fur seals were located on the ... estimated 24 pups on a vegetated promontory on the northern section of Boggel Beach, and the second, a ...
Meeting Document : WG-EMM-03/18 : Auteur(s): M.N. Bester, P.G. Ryan and B.M. Dyer (South Africa)