Résultats de la recherche
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Results from the random stratified trawl surveys to estimate distribution and abundance of Dissostichus eleginoides and Champsocephalus gunnari in the Heard Island region (Division 58.5.2) for 2010 and 2011
2011 on the RV Southern Champion, adding to the time series of annual surveys in Division 58.5.2 that ... % of the 2011 catch. In 2011 the abundance of L. squamifrons was higher, and C. rhinoceratus lower than ... of invertebrates was reported in the 2010 survey, consisting mostly of poriferan sponges, anemones ... of Dissostichus eleginoides and Champsocephalus gunnari in the Heard Island region (Division 58.5.2 ...
Meeting Document : WG-FSA-11/23 : Auteur(s): G.B. Nowara, S.G. Candy and T. Lamb (Australia)
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Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Bird Island, South Georgia during the 2000 winter and the 2000/01 breeding season
entanglements over the 2000 winter than in 1999; some of which can be explained by interannual variation in the ... injuries accounted for 35% of entanglements over winter and 23% during the summer. As in previous years ... entangled males in the winter compared to summer reflects the sex ratio of Antarctic fur seals ashore over ... entanglements in both the summer and winter periods. The prevalence of these bands in the Southern Ocean marine ...
Meeting Document : SC-CAMLR-XX/BG/03 : Auteur(s): Delegation of the United Kingdom
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Modelling the dynamics of krill populations in the Antarctic Peninsula region
estimates of recruitment to the population can be used to model in detail interannual variation in the ... dynamics of krill are used to assess to what extent they can explain the observed changes in the density of ... Abstract: The current long-term estimates of mean recruitment rates suggest that the population ... population dynamics of krill and estimate the expected mortality rates. A number of models of the population ...
Meeting Document : WG-EMM-99/56 : Auteur(s): E.J. Murphy (United Kingdom), A. Constable (Australia) and D. Agnew (United Kingdom)
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Estimates of the tag loss rates for single and double tagged toothfish (Dissostichus mawsoni) fishery in the Ross Sea
introduce negligible bias of less than 0.5% with less than 1% change in the overall estimated variance (mean ... modelling of the Antarctic toothfish (Dissostichus mawsoni) populations in Subarea 88.1 and 88.2. The ... rate of failure (λ = 0.039 y-¹), but no evidence of a change in the failure rate over time. It is ... plausible that there could be a catastrophic failure of tags or some other systematic change in the tag loss ...
Meeting Document : WG-SAM-11/18 : Auteur(s): A. Dunn, M.H. Smith (New Zealand), D.J. Agnew (UK) and S. Mormede (New Zealand)
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Shedding new light on the life cycle of mackerel icefish in the Southern Ocean
in the north. Stocks have declined in most parts of the distributional range due to the impact of ... parts of the Indian Ocean appear to have led to increased predation on stocks of icefish. Shifts in ... hydrological regimes in the northern part of the distributional range have either started to lead or will lead ... : Shedding new light on the life cycle of mackerel icefish in the Southern Ocean Approval: Approved ...
Meeting Document : WG-EMM-03/4 : Auteur(s): K.-H. Kock (Germany) and I. Everson (United Kingdom)
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Entanglement of Antarctic fur seal Arctocephalus gazella in man-made debris at Bird Island, South Georgia during the 2001 winter and the 2002 breeding season
entangled during the pup-rearing period suggesting an increased presence of man-made debris in the waters in ... discussed. Plastic packaging bands and synthetic strings accounted for the majority of all entanglements in ... both winter and summer. Loops of synthetic string, as used in longline fishing, is now the most ... monitoring and increased effort in ensuring correct disposal of debris with the potential to entangle ...
Meeting Document : SC-CAMLR-XXI/BG/04 : Auteur(s): Delegation of the United Kingdom
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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Bird Island, South Georgia during the 1999 winter and the 1999/2000 pup rearing season
and a 94% decrease on the highest previous total (1992). Four of these animals wereentangled in ... on the 1998 winter. The number of seals observed entangled in the summer was the second lowest ... recorded to date,being 42% lower than in the 1998/99 season. The proportion of adult animals affected was ... number of entanglements in polypropylene straps showed an increase by12.5% onthe 1998/99 season. The low ...
Meeting Document : SC-CAMLR-XIX/BG/02 : Auteur(s): Delegation of the United Kingdom
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Relationship between distribution of Antarctic krill (Euphausia superba) and environmental index MTEM-200 in the Antarctic Ocean throughout the year
concentrated in three waters in the east Antarctic Ocean, the Scotia Sea, and north of South Georgia Island ... in the Scotia Sea, and north of South Georgia Island, respectively. Similarly, the historical krill ... isopleths of MTEM-200 substantially corresponded with each oceanic front in the Southern Ocean. MTEM-200 can ... Abstract: Antarctic krill (Euphausia superba) is the key species of the Antarctic marine ...
Meeting Document : WG-EMM-08/32 : Auteur(s): M. Naganobu, T. Kitamura and K. Hasunuma (Japan)
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An updated spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region
spatial distribution and movement of Antarctic toothfish in the Ross Sea region given the movement ... hypothesis proposed. Further data collection would be useful to improve the parameterisation of the model, in ... operating model for Antarctic toothfish in the habitable depths of the Ross Sea region Approval: Approved ... model for Antarctic toothfish in the Ross Sea region, for a medium scale spatial resolution (189 spatial ...
Meeting Document : WG-SAM-14/31 : Auteur(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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Modelling the predator–prey interactions of krill, baleen whales and seals in the Antarctic ecosystem
Abstract: The history of human harvests of seals, whales, fish and krill in the Antarctic is ... ) species. The model commences in 1780 (the onset of fur seal harvests) and distinguishes the Atlantic ... /Indian and Pacific sectors in view of the much larger past harvests in former. A reference case and five ... Africa) Title: Modelling the predator–prey interactions of krill, baleen whales and seals in the ...
Meeting Document : WG-EMM-05/34 : Auteur(s): M. Mori and D.S. Butterworth (South Africa)