Search results
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Sexual ratio of Dissostichus eleginoides from longlines samples: a partial indicator of reproductive migration in Subarea 48.3
and the third week of July 1996, in the subarea 48.3 shows that the sex ratio departs from the ... expected 1:l ratio being the females more abundant in the longline samples, except during May, when the ... bottom habitats, this finding suggests that: or the females remain in higher proportion in the habitat ... the longline fishing techniques, or both sexes rise in the water column for spawn. No one of these ...
Meeting Document : WG-FSA-96/44 : Author(s): Moreno, C.A., Guerra, J., Zuleta, A.
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Analysis of operating conditions of the fishing vessel in relation to the distribution, biological state and behaviour of Antarctic krill (a contribution to the development of a simulation model)
processing vessel producting krill meat. The vessel operated in the Commonwealth Sea, the Cosmonaut Sea and ... in twi Scotia Sea areas (off South Orkneys and off South Georgia) from February to June 1988. In all ... cause was tthe size composition of krill in the catches. Preference was given to larger krill. The ... density of krill in aggragtions usually remained at a high level and was a less important cause of area ...
Meeting Document : SC-CAMLR-VIII/BG/23 : Author(s): Delegation of USSR
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Fishery selection for Patagonian toothfish in CCAMLR Subarea 48.3, asymptotic or dome shaped?
Abstract: Characterisation of fishery selection is key to reducing uncertainty in the ... waters as they age and increase in size and, in combination with the practical difficulties associated ... Patagonian toothfish (D. eleginoides) in Subarea 48.3 is used to determine whether there is sufficient ... age with depth, is suggested as an indicator that a dome selection pattern is unlikely in the 48.3 ...
Meeting Document : WG-SAM-15/29 : Author(s): C. Darby, V. Laptikhovsky and M. Soeffker (United Kingdom)
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Geographical differences in the condition, reproductive development, sex ratio, and length distribution of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (CCAMLR Statistical Subarea 88.1)
differences in a number of indices from toothfish found on the Ross shelf proper, as distinct from those ... a consistent peak over all sampling seasons in comparison with the southern group in which the ... distribution was multimodal, showed a consistent and significant higher ratio of males to females, was in ... poorer condition, and was more advanced in reproductive development. Author(s): J.M. Fenaughty (New ...
Meeting Document : WG-FSA-05/52 : Author(s): J.M. Fenaughty (New Zealand)
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Acoustic assessment of potential bias in abundance estimates of mackerel icefish from trawl surveys
Abstract: In 2000, CCAMLR asked the Working Group on Fish Stock Assessment (WG-FSA), whether ... that a significant proportion of the stock occurred in midwater. If this is the case, then bottom trawl ... trawl and acoustic data taken contemporaneously during a survey for mackerel icefish in the Heard Island ... region (CCAMLR division 58.5.2) in May 2000. The relationship between mackerel icefish catches and the ...
Meeting Document : WAMI-01/05 : Author(s): E. van Wijk, T. Pauly, A. Constable and R. Williams (Australia)
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PROPERTIES OF WATER DYNAMICS AND KRILL DISTRIBUTION IN THE SOUTH SANDWICH ISLANDS SUBAREA
Abstract: of mean krill density in Subarea 48.4 there are premises for formation of the zones ... with meanders and eddy favorable for krill concentration. Here, in the cold water of the Weddell Sea ... , the main part of biomass of Subarea 48.4, are concentrated. In January-February, 2000, almost 60% of ... fields, distributed in a rather narrow depth range,- obviously may promote above said zones, firstly ...
Meeting Document : WG-EMM-09/44 Rev. 1 : Author(s): S.M. Kasatkina and V.N. Shnar (Russia)
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Important Bird Areas (IBAs) in Antarctica
Environmental Protection (CEP XVIII) at its June 1-5 meeting in Sofia, Bulgaria (WP 40, Important Bird Areas ... (IBAs) in Antarctica and IP 27 Important Bird Areas (IBAs) in Antarctica). These papers reported on the ... population assessment worldwide. The CEP recognised the value of the IBA report to those interested in bird ... Resolution D (2015) welcomed the report and recommended that Parties take into account the information in the ...
Meeting Document : WG-EMM-15/32 : Author(s): P.A. Penhale (USA)
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A review of conversion factors used in CCAMLR toothfish fisheries
Abstract: The product to green-weight conversion factors used in the toothfish fishery are ... paper reviews the data available on conversion factor in the C2 and Observer data as well as the factors ... as an apparent long-term trend in the most commonly reported conversion factors. This variability ... reconciliation between the reported catch for a vessel and the weight of product reported in a catch document ...
Meeting Document : WG-FSA-15/02 : Author(s): CCAMLR Secretariat
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A proposal for large scale sampling of krill in the diet of predators across Area 48 to coincide with the CCAMLR synoptic survey
Abstract: There is a high degree of spatial and temporal variability in the population of ... South Georgia krill in the diet of Antarctic fur seal Arctocephalus gazella show a good level of ... concordance with scientific net samples. In order to examine the potential of using krill in the diet of ... between krill in the diet or predators and from net hauls, to compare the timing of temporal changes in ...
Meeting Document : WG-EMM-99/33 : Author(s): K. Reid (United Kingdom)
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Susceptibility to oxidative stress in different species of Antarctic birds: preliminary results
Abstract: The antioxidant defences in aerobic organisms represent the detoxification pathway ... condition, generally termed as oxidative stress, may arise. In this preliminary work, susceptibility to ... oxidative stress has been compared in Adélie penguin (Pygoscelis adeliae) and South polar skua (Catharacta ... cycle very stressful. In the framework of the Italian Research Program in Antarctica (PNRA), blood ...
Meeting Document : WG-EMM-99/59 : Author(s): S. Corsolini, F. Regoli, S. Olmastroni, M. Nigro and S. Focardi (Italy)