Resultados de la búsqueda
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Krill population dynamics at South Georgia: implications for ecosystem-based fisheries management
to successful ecosystem-based management of krill fishery in the region. Krill acoustic-density data ... from surveys conducted in the early, middle and late period of the summers of 2001 to 2005, together ... krill population dynamics model to evaluate potential mechanisms behind the observed changes in krill ... biomass. Krill abundance was highest during the middle of the summer in 3 years and in the late period in ...
Meeting Document : WG-EMM-10/P08 : Autor(es): K. Reid, J.L. Watkins, E.J. Murphy, P.N. Trathan, S. Fielding and P. Enderlein
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Coastal weather drives foraging behaviour of chinstrap penguins, Pygoscelis antarctica
Abstract: There is increasing interest in using higher-trophic level predators as ecosystem ... supports them. In the southwest Atlantic sector of the Southern Ocean, Antarctic krill (Euphausia superba ... the ecosystem in an adaptive framework for sustainably managing krill catch levels, performance ... environmental variability and fishing pressure on krill availability at scales relevant to predators. In this ...
Meeting Document : WG-EMM-18/P14 : Autor(es): A.D. Lowther, P. Trathan, A. Tarroux, C. Lydersen and K.M. Kovacs
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Krill fishery information
Abstract: Fisheries targeting krill (Euphausia superba) in the CCAMLR Convention Area during 1998 ... /99 caught 103318 t of krill, and preliminary information indicates that the catch in 1999/00 will ... exceed 82913 t. Krill caught in 1998/99 was taken in Subareas 48.1 (38% of total catch), 48.2 (49%) and ... 48.3 (13%). As in recent past years, only grounds in Area 48 were fished. Catch and effort data and ...
Meeting Document : WG-EMM-00/25 : Autor(es): Secretariat
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Observer notes (Subarea 88.1)
bottom long-line sets in Subarea 88.1 from 15.12.03 till 10.03.04 are presented. For the first time ... Antarctic toothfish was found in long-line catches above seamounts of the Pacific-Antarctic Ridge to the ... North up to 56°S. Presence of Patagonian toothfish in spawning aggregations of Antarctic toothfish ... cannot lead to their intbreeding as its gonads were at the early development stages in that period ...
Meeting Document : WG-FSA-04/89 : Autor(es): V.G. Prutko (Ukraine)
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Modelling the impact of fishery by-catches on albatross populations
shown marked declines in abundance throughout their range. These seabirds are frequently taken as by ... -catch in longline fisheries and this mortality has been implicated in the population declines. 2. We ... parameters in the model. 3. The model used two alternative assumptions about patterns of at-sea distribution ... population was substantially poorer. This probably reflects: (i) greater overlap in the Indian Ocean than in ...
Meeting Document : WG-FSA-01/18 : Autor(es): G. Tuck, T. Polacheck (Australia), J.P. Croxall (UK) and H. Weimerskirch (France)
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On the problem of diurnal migrations of some fish species on the South Georgia shelf (Subarea 48.3)
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 ... expressed during 24 hours. It was distinctly observed in juvenile and adult individuals: they were kept ...
Meeting Document : WG-FSA-99/64 : Autor(es): I.A. Trunov, J.A. Frolkina and M.P. Konstantinova (Russia)
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The fish diet of black-browed albatross Diomedea melanophrys and grey-headed albatross D. chrysostoma at South Georgia
60% by mass of the diet of grey-headed albatrosses in 1986 and 1994 respectively. We determined the ... otoliths (54 representing 9 taxa and 57 representing 17 taxa in black-browed and grey-headed albatross ... samples respectively). For black-browed albatrosses in 1986 the main fish prey was Patagonotothen guntheri ... (40% estimated biomass), whereas in 1994 Pseudochaenichthys georgianus was the main fish prey (57% of ...
Meeting Document : WG-EMM-96/11 : Autor(es): Reid, K., Prince, P.A., Croxall, J.P.
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CCAMLR ecosystem monitoring and management: future work
Abstract: Harvesting of marine living resources in the Southern Ocean is managed by the ... in the conservation objectives. In the late 1980s, the precautionary approach of CCAMLR was ... developed, incorporating principles of how to use scientific evidence in the decision making process. Even ... ), it takes account of the needs of predators in the assessment of catch limits. The success of this ...
Meeting Document : WG-EMM-12/P05 : Autor(es): A.J. Constable
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Network characterisation of the food-web of the Ross Sea, Antarctica
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 ... pronounced peak in biomass in the lower-middle part of the food-web, a result of high biomass of ... the total living biomass in the Ross Sea (bacteria excluded). The six groups with the highest ‘indices ...
Meeting Document : WG-EMM-12/53 : Autor(es): M.H. Pinkerton and J.M. Bradford-Grieve (New Zealand)
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Infectious diseases of Antarctic penguins: current status and future threats
tourists in the future. Three main areas are likely to be impacted by this increase in use and by ... occurred. The majority of these events have occurred since the year 2000 in regions that will likely be ... valuable as indicators of the status of marine ecosystem health and are an indicator-species used in the ... on these birds. Long-term disease studies would therefore be useful as an adjunct to aid in ...
Meeting Document : WG-EMM-14/53 : Autor(es): W.W. Grimaldi, P.J. Seddon, P.O.B. Lyver, S. Nakagawa and D.M. Tompkins (New Zealand)