Search results
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Reasons of differences between distribution and density of mackerel icefish (Champsocephalus gunnari) aggregations in the South Georgia area during summer and autumn periods in different years from the bottom trawl survey data
Abstract: During the feeding period icefish aggregations are confined to a frontal zone between ... . Icefish concentrations were detected at the periphery of a cyclonic meander or in the centre of the ... and the coastal waters. Such a confinement of fish aggregations to dynamically active zones arises ... rather from concentration of food organisms in these areas than as a result of favourable conditions for ...
Meeting Document : WG-FSA-05/77 : Author(s): Zh.A. Frolkina (Russia)
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Summer distribution, abundance and structure of krill populations (Euphausia superba and Euphausia crystallorophias) sampled by plankton net in the western Ross Sea (January–February 2000)
) were analysed to obtain a general picture of the summer distribution pattern, abundance and demography ... of krill in the western Ross Sea (Antarctica). A midwater sampler-trawl (Hamburg Plankton Net) was ... used to collect zooplankton and fish larvae at 63 stations. The net was deployed normally as a standard ... Continental Shelf, was 9.4 (±18%) g/l000m3 of filtered water with a mean density of 11.0 (±16%) indviduals per ...
Meeting Document : WG-EMM-00/38 : Author(s): M. Azzali, A. Sala and G. Brancato (Italy)
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The effect of temporal variability on power analysis predictions for Adélie penguin CEMP parameters at Béchervaise Island
ability of CEMP data to detect change. The effect size that should prompt a response if observed in a ... power analysis estimates results in a decreased level of power to detect a trend. Similar power analysis ... results are obtained for a fixed co-efficient of variation of the temporal variability SD in relation to ... (5.2 – 6.7%). For example, with a 10 year monitoring program it is possible to detect fixed increases ...
Meeting Document : WG-EMM-03/49 : Author(s): L.M. Emmerson and C. Southwell (Australia)
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Streamlining the work of the Scientific Committee for the Conservation of Antarctic Marine Living Resources (SC-CAMLR)
Abstract: In recent years, the Scientific Committee has been dealing with a great diversity of ... meetings and a large diversity of important issues. A number of important issues are not being addressed ... through the year: a two week period for workshops, a three week period for the Scientific Committee and ... its working groups and maybe workshops in mid-year, and a short meeting of the Scientific Committee ...
Meeting Document : WG-EMM-15/59 : Author(s): G. Watters (USA), A. Constable and D. Welsford (Australia)
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Beach debris survey, Signy Island, South Orkney Islands, 2005/06
and size categories. A total of 27 items weighing 24.36kg were collected. The number of items found ... recovered had increased (a decrease of 28.94% and increase of 55.04% since 2004/05 respectively). There was ... a fall in the number of plastic packaging bands (9) from the total recorded the previous season (12 ... ), this decrease representing a contrast to the rise in packaging bands experienced over the previous four ...
Meeting Document : SC-CAMLR-XXV/BG/14 : Author(s): Delegation of the United Kingdom
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Review of biological parameters for Ross Sea skates
. Differences in length-weight relationships among regions raise doubt about the conspecificity of A. georgiana ... and female A. georgiana and B. cf. eatonii from the Ross Sea are provided. Male and female ... relationships differ significantly for both species. Male A. georgiana attain 50% maturity at 92 cm total length ... and 100–110 cm TL for females. The best available, but unvalidated, growth curve for A. georgiana for ...
Meeting Document : WG-FSA-06/31 : Author(s): M.P. Francis (New Zealand)
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Report of the WG-FSA Intersessional Subgroup on Sampling Catches from Longlines
subsampling methods use the hauling completed within a day as a frame, and theoretically cover all fishing ... activity by sampling every day of hauling. Both methods essentially follow a multi-stage cluster sampling ... fish/day, to sampling a set length of each line or number of hours of each day. The principal advantage ... of the time-based method is that it gives a frame that can be monitored easily using a watch, but the ...
Meeting Document : WG-FSA-02/52
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Relationship between Antarctic krill (Euphausia superba) variability and westerly fluctuations and ozone depletion in the Antarctic Peninsula area
affects the Antarctic marine ecosystem as a whole. We have assessed variability in krill recruitment and ... . We found a significant positive correlation between krill recruitment in the Antarctic Peninsula area ... ; = 0.57) and 2-year-old krill (r = 0.69) with a level of significance of 5%. In addition, the strength of ... westerlies also had a strong correlation with chlorophyll a (r = 0.63) and sea ice cover with a 1-year time ...
Meeting Document : WG-EMM-99/52 : Author(s): M. Naganobu, K. Kutsuwada, Y. Sasai and T. Taguchi (Japan) and V. Siegel (Germany)
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The feeding peculiarities of the Antarctic seals in the region of the archipelago of Argentina Islands
Abstract: The detailed analysis of a food of the Antarctic species of seals around Argentine ... makes 97,2 % to a diet of fur seals (Arctocephalus gazella) and 90 % to a diet crabeater seal (Lobodon ... counted within archipelago, the most numerous is the crabeater seal and a southern fur seal- these species ... established, that the leopard seal’s fodder diet is similar, to a diet of a specie around eastern Antarctic ...
Meeting Document : WG-EMM-12/P01 : Author(s): I. Dykyy
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Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983–2010
. coriiceps at Potter Cove, South Shetland Islands, over a 28-yr period, 1983-2010. N. rossii abundance ... from 1986, exhibited a similar pattern, showing a decrease until 1991-92. After a period of relative ... stability (1992-1994), a sharp increase in length and a continued decline in relative abundance indicated ... and suggest that a further two decades will lapse before these stocks recover. Using the South ...
Meeting Document : WG-FSA-12/P01 : Author(s): E.R. Marschoff, E.R. Barrera-Oro, N.S. Alescio and D.G. Ainley