Resultados de la búsqueda
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Estimating penguin populations using image analysis of colour aerial photography
Abstract: Penguin populations are potentially sensitive indicators of change in the Antarctic and ... colonies, for colonies in areas of complex terrain, or for colonies where ground access is difficult ... of a computer based image analysis of digitally scanned colour aerial photographs of macaroni penguin ... : Estimating penguin populations using image analysis of colour aerial photography Approval: Approved ...
Meeting Document : WG-EMM-02/34 Text : Autor(es): P.N. Trathan (United Kingdom)
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Age-at-length of Patagonian toothfish from South Georgia
Abstract: To provide an age-length key for use in modelling the age structure of the Patagonian ... toothfish stock around South Georgia, we used otoliths to estimate the age of a sample of 264 Patagonian ... reader undertook three readings of the sections, estimating age using criteria corresponding to those ... fisheries survey in 2000, estimates of the Von Bertalanffy parameters were L8 = 123.8, K = 0.10 and t0 =-2.1 ...
Meeting Document : WG-FSA-02/75 : Autor(es): J. Ashford, M. Belchier, C. Jones and S. Bobko
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Distribution of temperature, salinity, density and flow across the Drake Passage in December 1994
Abstract: This paper presents vertical distribution of temperature, salinity, density and flow ... across the Drake Passage. The seventh Antarctic Ocean Survey cruise by the R/V Kaiyo Maru of the Japanese ... sections. The maximum speed of the flow was approximately 30cm/s corresponding to the Polar Front zone ... . Upwel1ing of the Warm Deep Water was suggested in the costal water north of the South Shetland Islands ...
Meeting Document : WG-EMM-01/30 : Autor(es): M. Naganobu and K. Kutsuwada (Japan)
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Preliminary analysis of seabird by-catch in the South Georgia icefish fishery
Abstract: We conducted a preliminary analysis on the numbers of birds caught as a bycatch in the ... 92 birds were caught, principally black-browed albatross and white-chinned petrel, with 93% of the ... factors affecting the probability of a haul catching birds, but no significant factors were found that ... could explain the number of birds caught. Differences in the numbers caught in the last three years also ...
Meeting Document : WG-FSA-01/30 : Autor(es): D.J. Agnew, N. Ansell and J.P. Croxall (United Kingdom)
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Variation in standing stock of the mackerel icefish Champsocephalus gunnari at South Georgia
abundance of the mackerel icefish Champsocephalus gunnari that, since 1990, are not directly attributable to ... , but indirectly influenced by, krill availability. 4. Examination of food chain relationships indicates ... postulated that could explain the episodic declines in the abundance of C. gunnari in the absence of fishing ... species, highlighting the importance of the ecosystem approach to fisheries management. Author(s): I ...
Meeting Document : WG-FSA-99/63 : Autor(es): I. Everson, G. Parkes (United Kingdom), K.-H. Kock (Germany) and I. Boyd (United Kingdom)
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Report on the results of exploratory research fishing for crabs in Subarea 48.2 on board FV Tamango in the 2009/10 season
Abstract: Exploratory research voyage of F/V 'TAMANGO' proceeded from March, 23 to May ... revealed no commercial concentrations of crabs on the South Orkney Islands shelf. However, commercial ... concentrations of king crabs were encountered in the area adjacent to CCAMLR area, on the North Scotia Ridge, at ... , three species of king crabs were found on the Patagonian shelf: Lithodes santolla, Paralomis ...
Meeting Document : WG-SAM-11/19 : Autor(es): V.A. Bizikov and S.E. Anosov (Russia)
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How much is enough? analysis of the net sampling effort in the Elephant Island area necessary to adequately assess and describe krill and zooplankton assemblages during summer
Elephant Island area are examined to determine the level of sampling effort required to adequately assess ... the (1) abundance and demographic structure of Antarctic krill and (2) relative abundance and ... interspecific relations of krill, salps and other macrozooplankton taxa in the Elephant Island area during ... operating on seasonal and interannual time scales. The results of these analyses indicate that minimal ...
Meeting Document : WG-EMM-97/32 : Autor(es): Loeb, V.
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Size variations associated with abundance changes in juvenile Notothenia rossii, observed at Potter Cove, South Shetland Islands, since the end of the fishery in the area
Abstract: Samples of fish collected from 1983 to 1992 at Potter Cove, King George Island, South ... rossii, in association with changes in the size and age structure of the juvenile population. Mean ... thought to be caused by local factors, but related with the operations of the commercial fishery during ... indicating the beginning of a recovery of the N. rossii population in Potter cove. Author(s): E.R. Marschoff ...
Meeting Document : WG-FSA-93/13 : Autor(es): E.R. Marschoff and E.R. Barrera-Oro (Argentina)
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Foraging energetics of grey headed albatrosses Diomedea chrysostoma at Bird Island, South Georgia
Abstract: At-sea metabolism (C02 production) and water turnover of six breeding Grey-headed ... Georgia. Mean food consumption (estimated from a water influx rate of 1.01 l d-1 and data on dietary ... composition) was 1200 g d-1 or 50.4 W. At-sea metabolism (derived from a rate of CO2 production of 3.98 l h-1 ... ) times the predicted BMR. This is the lowest cost of flight yet measured, but consistent with the highly ...
Meeting Document : SC-CAMLR-VII/BG/31 : Autor(es): D.P. Costa (USA) and P.A. Prince (United Kingdom)
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Extending ecological monitoring to underpin the development of feedback management approaches for the Antarctic krill fishery
fishery. Such a management approach may also require the development of a new or extended monitoring ... of the issues associated with the development of a new monitoring programme, outlining one possible ... each. We propose that CCAMLR consider the merits of different approaches over the next two years, so ... that it can agree a way forward and make best use of the recently established CEMP Fund. Author(s ...
Meeting Document : WG-EMM-12/04 : Autor(es): P.N. Trathan (UK), H.J. Lynch (USA), C. Southwell (Australia), P.T. Fretwell (UK), G. Watters (USA) and N. Ratcliffe (UK)