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Development of foraging behaviour and evidence of extended parental care in the gentoo penguin (Pygoscelis papua)
with extended parental provisioning, behaviours not observed in other Pygoscelis species. Chicks took ... sea. Trip duration increased significantly with chick age as trips to sea becoming more similar to ... adult foraging trips in both timing and duration. Behavioural observations confirmed that many chicks ... were still being fed during this fledging period, with parental feeding behaviours most often observed ...
Meeting Document : WG-EMM-06/8 : Автор(ы): M. Polito and W.Z. Trivelpiece (USA)
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Genetic structuring of Patagonian toothfish populations in the southwest Atlantic Ocean: the effect of the Antarctic Polar Front and deep-water troughs as barriers to genetic exchange
species with potential for high dispersal are of great interest, not only from an evolutionary standpoint ... but also with regard to effective management. Previous genetic studies have demonstrated substantial ... these data indicate that the APF, as a barrier to larval dispersal, is the major inhibitor of genetic ... exchange between toothfish populations, with deep-water troughs and distance between sites contributing to ...
Meeting Document : WG-FSA-04/21 : Автор(ы): P.W. Shaw, A.I. Arkhipkin and H. Al-Khairulla (United Kingdom)
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Stones in toothfish stomachs: an unusual source of geological information from closed regions of Antarctic shelf and slope
respect, Dissostichus mawsoni may be considered as a «dredge» with a wide area of sampling. Preliminary ... stones may be used for geological description of the closed areas of Antarctic shelf and slope. In this ...
Meeting Document : WG-FSA-07/58 : Автор(ы): N.V. Kokorin, D.S. Klucharev and M.A. Sukhoruchenkov (Russia)
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Estimates of circumpolar abundance of Antarctic krill based on recent acoustic density measurements
tonnes- at the low end of values that have been suggested in the past. The differences between our ... estimates and others can be explained by a number of factors such as: an underestimation of the range or the ... value used in the past. The seasonal and local consequences of large catch limits will have to be taken ... statistical divisions as management areas will have to be considered. File: 05nicol-etal.pdf ... that have been suggested in the past. The differences between our estimates and others can be ... result, and that the stratified krill biomass estimates may be similarly realistic, particularly for ... swarms. Underwater photographs of subsurface aggregations of krill reveal that they can be closely ... indicate that the calculated precautionary catch limit is likely to be higher than the current 1.5 ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 87–99 : Автор(ы): Nicol, S., A.J. Constable and T. Pauly
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Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)
presents a re-working and synthesis of previous analyses to examine whether declines in CPUE can be ... in localised areas for periods of at least three days. The results suggest that there is greater ... consistent signal in the data for the depletion model to be used to estimate local abundance. A number of ... size, and that this reduction would be indicated by a significant decline in an abundance index with ... vessels which overlapped with the series being analysed. Note that no detailed position information was ... the analysis, even though it is possible that some of these may have overlapped with the selected ... total catch taken over time t and M is natural mortality. This assumes that there is no recruitment to ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Автор(ы): Parkes, G., C.A. Moreno, G. Pilling and Z. Young
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Assessing the accuracy of penguin breeding abundance estimates at regional scales in Antarctica from existing count data: a review using Adélie penguins as a case study
be assessed. A formal abundance estimator appropriate to regional scale abundance estimation from ... existing data is developed and the assumptions underlying that estimator outlined. Existing data for Adelie ... accurate regional estimates of breeding populations, as derived from existing data, might be. Author(s): C ...
Meeting Document : WG-EMM-04/55 : Автор(ы): C. Southwell (Australia)
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Results of a CCAMLR sponsored research survey to monitor abundance of subadult Antarctic toothfish in the southern Ross Sea, February 2013
Abstract: At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... abundance from a well-designed survey could be a useful input into the Ross Sea stock assessment model. The ... subadult abundance which could be included as strata in future annual surveys. Author(s): S.J. Parker, S.M ...
Meeting Document : WG-SAM-13/32 : Автор(ы): S.J. Parker, S.M. Hanchet, S. Mormede, A. Dunn (New Zealand) and R. Sarralde (Spain)
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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 : Автор(ы): G. Skaret and R.J. Korneliussen (Norway)
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Research plan to investigate finfish distribution and abundance in Subareas 48.1 and 48.2
2014, 2015 and 2016 in accordance with Conservation Measure 24-01 (paragraph 3). The research will ... provide information on finfish distribution, abundance and size composition, with the objective of ... determining the current status of fish stocks in the study area. Research fishing will be limited to 100 ...
Meeting Document : WG-SAM-13/14 : Автор(ы): Submitted by the Secretariat on behalf of Chile
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Research plan to investigate finfish distribution and abundance in Subareas 48.1 and 48.2
2014, 2015 and 2016 in accordance with Conservation Measure 24-01 (paragraph 3). The research will ... provide information on finfish distribution, abundance and size composition, with the objective of ... determining the current status of fish stocks in the study area. Research fishing will be limited to 100 ...
Meeting Document : WG-FSA-13/10 : Автор(ы): Delegation of Chile
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