Résultats de la recherche
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Variation in reproductive performance of seabirds and seals at South Georgia, 1976–1986 and its implications for southern ocean monitoring studies
Orkney Islands) are summarised and reviewed. Breeding success of the Wandering Albatross, which breeds in ... significantly. The other species at South Georgia, which breed in summer and for which krill forms a significant ... proportion of their diet, have shown major fluctuations in some or all of: breeding population size, breeding ... success, foraging trip duration and offspring growth rate. 1977-78 and 1983-84 were summers of ...
Meeting Document : SC-CAMLR-VI/BG/15 : Auteur(s): J.P. Croxall, T.S. McCann, P.A. Prince and P. Rothery (United Kingdom)
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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Signy Island, South Orkney Islands, 1998/99
entangled but had lost their collars by the time of observation. All of the animals involved were juvenile ... parallel study undertaken at Bird Island, South Georgia in 1998/99. These indicated that the number of ... of fur seals was entangled in packaging bands at Signy Island (67%) than at Bird Island (38 ... %). Entanglements in packaging bands at Signy Island were 47% higher than the previous season. There were no reports ...
Meeting Document : SC-CAMLR-XVIII/BG/06 : Auteur(s): Delegation of the United Kingdom
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Report of the South Georgia groundfish survey (Subarea 48.3) in January 2006
the N and NE of South Georgia. Fish in spawning condition (Stage IV) were found at the eastern end of ... Abstract: The biennial South Georgia Groundfish Survey was undertaken in January 2006 on board ... + fish in 2003. The toothfish diet was dominated by Patagonotothen guntheri. Acoustic observations were ... made in association with both demersal and pelagic data and will help discriminate icefish from other ...
Meeting Document : WG-FSA-06/51 : Auteur(s): M.A. Collins, C. Jones, J. Clark. S. Fielding, J. Slakowski, T. North, W. Reid and J. Watts (United Kingdom)
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Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of relative mortality and tag-detection rates
CCAMLR of a number of toothfish fisheries in Antarctica, but the evaluation of tagging performance has ... can derive meaningful indices of relative performance of groups of fishing effort (e.g. vessel, trip ... detection rate of recaptured fish. This method was applied to the tagging data in CCAMLR Subareas 88.1 and ... 88.2. Results show that the indices developed can provide evidence of significant differences in ...
Meeting Document : WG-FSA-12/47 Rev. 1 : Auteur(s): S. Mormede and A. Dunn (New Zealand)
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Krill distribution related to water structure and dynamics on the South Georgia shelf in January 2000 (AtlantNIRO-BAS Core Programme 1999/2000)
apparent. In the western box krill density was nearly 0.2 glm3 and in the eastern box was 1.8- 4.7 glm3 ... distribution were carried out in two standard boxes on the shelf and slope northwest and northeast of South ... Georgia. Eight hydroacoustic transects with hydrographic stations and RMT8+1 trawls were carried out in ... • Juvenile krill of 30-36 mm length were observed in the shelf zone and larger specimens, including spawning ...
Meeting Document : WG-EMM-00/51 : Auteur(s): V.A. Sushin (Russia), P.P. Chernyshkov (Russia), F.F. Litvinov (Russia), J.L. Watkins (United Kingdom) and A.S. Brierley (United Kingdom)
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Seasonal and interannual variation in foraging range and habitat of macaroni penguins Eudyptes chrysolophus at South Georgia
Abstract: In marine ecosystems, characterisation of the foraging areas and habitats of predators ... is a key factor in interpreting their ecological role. We studied the foraging areas of the macaroni ... 2001 using satellite tracking. We investigated differences in foraging ranges and characteristics ... (male average = 572 km; female average = 376 km) in a north-westerly direction towards the Maurice Ewing ...
Meeting Document : WG-EMM-02/21 Text : Auteur(s): K.E. Barlow and J.P. Croxall (United Kingdom)
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Seasonal and interannual variation in foraging range and habitat of macaroni penguins at South Georgia
Abstract: In marine ecosystems, characterisation of the foraging areas and habitats of predators ... is a key factor in interpreting their ecological role. We studied the foraging areas of macaroni ... tracking. We investigated differences in foraging ranges and characteristics between different stages of ... ; female average = 376 km) in a north-westerly direction towards the Maurice Ewing bank; some individuals ...
Meeting Document : WG-EMM-01/19 : Auteur(s): K.E. Barlow and J.P. Croxall (United Kingdom)
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Preliminary results of the third CCAMLR sponsored research survey to monitor abundance of subadult Antarctic toothfish in the southern Ross Sea, February 2014
the other strata, in particular close to Ross Island in the south and in the north-eastern side of ... first survey was completed in February 2012 (), and the second survey was completed in February 2013 ... (Parker et al. 2013). In this paper we provide preliminary results of the third survey in the time series ... toothfish in the southern Ross Sea (strata A–C) using standardised gear in a standardised manner; and (ii ...
Meeting Document : WG-SAM-14/24 : Auteur(s): S. Mormede, S.J. Parker, S.M. Hanchet, A. Dunn (New Zealand) and S. Gregory (United Kingdom)
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Distribution and abundance of Antarctic krill in the vicinity of Elephant Island during the 1994 austral summer
from four acoustic surveys conducted in the vicinity of Elephant Island, Antarctica, from mid-January ... Island and the eastern end of King George Island; the second and third surveys covered approximately 2100 ... biomass in the same survey portion was estimated to be 359 X 106 t. During the second and third surveys ... high densities of krill were mapped in the shoal waters to the north of Elephant Island; biomasses were ...
Meeting Document : WG-Joint-94/09 : Auteur(s): R.P. Hewitt and D.A. Demer (USA)
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Seabird by-catch in the Patagonian toothfish longline fishery at the Prince Edward Islands: 1999–2000
sanctioned longline fishing for Patagonian toothfish Dissostichus eleginoides in the Exclusive Economic Zone ... sanctioned fishing trips. Fishing effort was 7.4 million hooks, a 45% increase on the number of hooks set in ... aequinoctialis predominated (92.2%), followed by Eastern Yellow-nosed Mollymawks Thalassarche [chlororhynchos ... 0.036 birds per 1 000 hooks, more than double that reported in 1998/99, but still considerably less than ...
Meeting Document : WG-FSA-00/30 : Auteur(s): P. Ryan and B. Watkins (South Africa)