Resultados de la búsqueda
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On the intensity of sampling krill trawl catches
Abstract: This paper uses actual krill length frequency data in an attempt to address the problem ... from commercial catches. In addition, the possible effect of two other factors (within-trawl ... (e.g. length-with-age). At present, and in the interests of both statistical rigour and the efficiency ... differences in length should be considered along with the need to collect maturity stage information. * For ...
Meeting Document : WG-KRILL-90/27 : Autor(es): D.G.M. Miller (South Africa)
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Antarctic ecosystem management
in accordance with the objectives and requirements of Article II of the Convention for the ... demographic status in sub-systems, and (c) conducting perturbation experiments in certain of these sub-systems ... be employed to monitor these stocks. In particular, early attempts should be made to model fishing ...
Meeting Document : WG-DCH-84/03 : Autor(es): D.S. Butterworth (South Africa)
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Alternative assessment methods for toothfish at South Georgia
first is that the CPUE in the early 1990s did not decline as would be expected as the resource was ... would be predicted by the model. Thirdly, all models predict a continuing decline, not the increase in ... initial lack of early decline, the abrupt decline between 1995 and 1996 and the subsequent increase in ... biomass in 2002 was between 78,000 and 114,000 t. Author(s): Kirkwood, G., Payne, A., Agnew, D. Title ...
Meeting Document : WG-FSA-SAM-04/17 : Autor(es): Kirkwood, G., Payne, A., Agnew, D.
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Considerations on the design and evaluation of surveys for estimating recruitment of Patagonian toothfish (Dissostichus eleginoides) with preliminary outcomes for the Heard Island plateau region (Division 58.5.2)
levels of confidence in the estimates of abundance for all but the youngest year class. It is recommended ... management procedure for D.eleginoides in Division 58.5.2 in order to determine the potential implications ... in the context of the elements of the current monitoring and assessment methods is outlined. Author(s ...
Meeting Document : WG-FSA-SAM-04/19 : Autor(es): Candy, S., Constable, A.J., Davies, C.R.
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A comparison of gear selectivity among three fishing gears for Antarctic krill with notes on the demographic patterns and productivity of Antarctic krill during summer 2014
showed that krill collected in Bransfield Strait and Elephant Island areas of the South Shetlands in ... summer 2014 were about 42 mm in length (3yrs old), and few small (<25mm) krill (1 year old) were ... captured. The majority of krill were mature and in spawning condition. Author(s): C. Reiss (USA) and M ...
Meeting Document : WG-EMM-14/37 : Autor(es): C. Reiss (USA) and M. Espino Sanchez (Peru)
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Quantifying the escape mortality of trawl caught Antarctic krill (Euphausia superba)
fishing gear. The methods for determining fishing mortality in krill are still poorly developed. We used a ... covered codend sampling technique followed by onboard observations made in holding tanks to monitor ... mortality of krill escaping the trawl nets in our study was 4.4 ± 4.4 %, suggesting that krill are fairly ... tolerant of the capture-and-escape process in trawls. Author(s): B.A. Krafft, L.A. Krag, A. Engås, S ...
Meeting Document : WG-EMM-16/04 : Autor(es): B.A. Krafft, L.A. Krag, A. Engås, S. Nordrum, I. Bruheim and B. Herrmann
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Population trends and reproductive success at a frequently visited penguin colony on the western Antarctic Peninsula
frequently visited locations, is at the epicenter of a rapid shift in which an Adélie penguin dominated fauna ... with larger trends in this region, the Adélie penguin population decreased by 29% and the gentoo ... Petermann Island. Whereas gentoo penguin reproductive success was lowest in colonies frequently visited by ... visited only occasionally. These results are placed in the context of other studies on reproductive ...
Meeting Document : WG-EMM-16/P07 : Autor(es): H.J. Lynch, W.F. Fagan and R. Naveen
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Density and biomass of Antarctic krill around South Shetland Islands using by 2-dB difference method
aggregations in the Elephant Island peripheries and south of South Shetland Islands were higher than those in ... the west of the South Shetland Islands. The mean length/height ratio of krill aggregations in the west ... of the South Shetland Islands (64.5) was higher than that in the south (35.9) and the Elephant Island ...
Meeting Document : SG-ASAM-17/04 : Autor(es): S.-G. Choi, K. Lee and D. An
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Computer program for the calculation and validation of Verhoeff check digits
type of errors in data for analysis are minimised. Accurate recording of the sequence numbers on tags ... the tag sequence number, can assist in the identification of errors in recorded data. A computer ...
Meeting Document : WG-FSA-SAM-05/11 : Autor(es): A. Dunn (New Zealand)
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Proposed CCAMLR educational package
aged approximately 10 to 16, focusing on CCAMLR and its role in the Antarctic. This package would ... CCAMLR website and could also be available in hard copy for distribution by post. It would be produced in ...
Meeting Document : CCAMLR-XXII/11 : Autor(es): Secretariat