Search results
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Scientific contribution to the 2016 review of Conservation Measure 51-07: Part 1 – rationale, method and data for a risk assessment framework for distributing the krill trigger level
land-based predators, of being inadvertently or disproportionally affected by the krill fishery ... land-based predators, of being inadvertently or disproportionally affected by the krill fishery.   ...
Meeting Document : WG-FSA-16/47 Rev. 1 : Author(s): A. Constable (on behalf of the e-group on CM 51-07 WG-EMM review)
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Towards an assessment of the stock of the ommastrephid squid Martialia hyadesi in the Scotia Sea: data from predators
annual catches and frequent switches to exploit new target species. It is likely, therefore, that ... exploitation of the sub-Antarctic ommastrephid species Martialia hyadesi will be attempted in the future. This ... be estimated but it may be relatively small unless they primarily consume post-spawning, moribund ... squid. At least for the albatrosses and southern elephant seal this does not appear to be the case ...
Meeting Document : SC-CAMLR-IX/BG/13 : Author(s): Delegation of United Kingdom
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Analysis of trawl data from the South Georgia krill fishery
a large number of trawls were undertaken by each,vessel, with trawls being shorter in duration during ... were undertaken by each ,vessel, with trawls being shorter in duration during the middle of the day ...
Meeting Document : WG-EMM-97/41 : Author(s): Parkes, G., Trathan, P.N., Everson, I., Murphy, E.J.
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On influence of acoustic survey methodology improvement on krill biomass estimation. (A comparison of results of acoustic surveys based on single-frequency and double-frequency algorithms)
algorithms that were obtained by processing data on Russian R/V ATLANTIDA surveying in 48.4 Subarea according ... to CCAMLR 2000 Krill Survey. It has been demonstrated that application of different methods to krill ... krill species identification, one may suggest that other improvements for recent twenty years could also ... have a considerable influence on biomass estimates obtained. Therefore. it is expected that the ...
Meeting Document : WG-EMM-01/41 : Author(s): S.M. Kasatkina and A.P. Malyshko (Russia)
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Uncertainty in echosounder calibrations
, 0.3, and 0.1 dB with standard deviations of 0.0, 0.3, and 0.2 dB, respectively. The operative measure ... (derived by peak intensities), differed from the theoretical values by-0.2, O.4, and 0.2 dB with standard ... optimal standard sphere, and a 0.3 ms pulse length, is estimated to be accurate to to.3 dB, and precise to ... . Additionally, more pronounced imprecision may be contributed by instabilities in the echosounder electronics ...
Meeting Document : WG-EMM-96/40 : Author(s): Soule, M.A., Demer, D.A.
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Background for evaluation of the suitability of the software suite Large Scale Survey System (LSSS) for inspection and processing of acoustic data from krill fishing vessels
potentially lead to large amounts of stored raw data of variable quality, which need to be scrutinised and ... example data from the krill fishing vessel ’Juvel’ it is here demonstrated that LSSS has flexible and ... ’ data format is used as LSSS native format, while other formats have to be converted. Author(s): G ...
Meeting Document : SG-ASAM-14/02 Rev. 1 : Author(s): G. Skaret and R.J. Korneliussen (Norway)
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Independent reviews of CCAMLR stock assessments – a discussion paper
understand that the Scientific Committee will be discussing possible avenues to achieve this goal. We believe ... reviews are made available to the public. In providing such transparency, external reviews could be used ...
Meeting Document : SC-CAMLR-XXXV/BG/20 : Author(s): Delegation of the USA
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Population trends of albatrosses and petrels at sub-Antarctic Marion Island
. Population trends of wandering albatross at Marion Island were strongly correlated with other Indian Ocean ... and can be explained by changes in tuna (Thunnus spp.) longline fishing effort in the southern Indian ... , could be contributing to the recent decreases in some of these species. Adoption of mitigation measures ... and an effective means of dealing with IUU longline fishing seem necessary to reduce the potential ...
Meeting Document : WG-FSA-01/11 : Author(s): D.C. Nel, P.G. Ryan, R.J.M. Crawford, J. Cooper and O. Huyser (South Africa)
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Preliminary results of investigations into the stock structure of Patagonian toothfish (Dissostichus eleginoides) around Macquarie Island
miles apart near Macquarie Island. Five DNA microsatellite loci were identified that showed polymorphism ... levels appropriate for population structure analysis, and two of these gave results that suggest samples ... genetic analyses that interchange of fish between the two sites is very low. Of 469 recaptures at both ... performed on small numbers of fish and loci these results must be regarded as preliminary, but if confirmed ...
Meeting Document : WG-FSA-98/39 : Author(s): A. Reilly, B. Ward and R. Williams (Australia)
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Sensitivity analysis identifies high influence sites for estimates of penguin krill consumption on the Antarctic Peninsula
identify 14 breeding colonies that contribute most significantly to uncertainty regarding the total number ... of pygoscelid penguins breeding in this region. We find that a high quality survey of Zavodovski ... at these sites should be considered top priority for future field work in the region. Our results are ... based on a robust quantitative method for assessing data priorities in estimating krill consumption that ...
Meeting Document : WG-EMM-12/P02 : Author(s): H.J. Lynch, N. Ratcliffe, J. Passmore, E. Foster and P. N. Trathan