Résultats de la recherche
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Characteristics of interannual variation in aggregation and diurnal vertical migration of Antarctic krill at South Georgia during winter
average krill body length in winter. This could be the optimal behavior of krill to balance food intake ... Abstract: We elucidated characteristics of interannual variability in density index, recruitment ... predictable fishing grounds occurred in the restricted areas throughout the study period. Main results are as ... predator performance were poor in the previous summer. Krill recruitment index at South Georgia suggested ...
Meeting Document : WG-EMM-18/34 : Auteur(s): T. Ichii, Y. Mori, P.N. Trathan, K. Mahapatra, M. Okazaki, T. Hayashi and T. Okuda
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Assessment of escape mortality of Antarctic krill (Euphausia superba) in trawls
escapees, thereafter kept on the surface in tanks to monitor rates of mortality. Hauling depth and duration ... Abstract: The overall purpose of this study was to estimate the mortality rate of Antarctic krill ... (Euphausia superba) that escape from the most common mesh size used in the current commercial fishery. The ... January-February 2014. The method applied consisted of a covered trawl codend system for retaining ...
Meeting Document : WG-EMM-14/14 : Auteur(s): B.A. Krafft (Norway) and L.A. Krag (Denmark)
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Survey estimates of recruitment of toothfish in Subarea 48.3
, the modal progression of peaks in the length densities corresponding to cohorts assessed by sequential ... data used by the Working Group for toothfish assessments in 1999 and later were correct. We found ... surveys. Length based analysis of these confirms the growth rate expected from the CCAMLR growth equation ... for South Georgia. Although it is easy to spot cohorts, the size of individual cohorts can not be ...
Meeting Document : WG-FSA-SAM-04/16 : Auteur(s): Collins, M., Wakeford, R.C., Moir-Clark, J., Belchier, M., Agnew, D.J.
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A comparative morphometric analysis of sagittal otoliths of three icefishes (Channichthyidae) in Antarctic waters
Abstract: In the present study a comparative morphometric analysis of sagittal otoliths was ... differences between the left and right sagittae in BSDs, a univariate and multivariate ANOVA and MANOVA were ... from the 20 harmonics analyzed were homoscedastic and normal, and showed very low level of correlation ... in the contour between both otolith pairs for each species (p<0.001). Similarly, EFS coefficients ...
Meeting Document : WG-FSA-18/47 : Auteur(s): G. Plaza, C. Rodríguez-Valentino and P.M. Arana
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Validation of age determination in Notothenia coriiceps, by means of a tag-recapture experiment at potter cover, South Shetland Islands
of 11-21 months. A comparison was carried out between the annuli found in scales removed before and ... after the period of liberty. In scales of those specimens recovered after 11-13 months, one extra ... deposition of the annulus in scales and otoliths of N. coriiceps. A preliminary analysis of scales ... Shetland Islands, in successive years from 1989 to 1992, 9 were recaptured at the same site after periods ...
Meeting Document : WG-FSA-94/12 : Auteur(s): E.R. Barrera-Oro and R.J. Casaux (Argentina)
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Models of Antarctic marine ecosystems in support of CCAMLR and IWC: background
to the use of ecosystem models in CCAMLR and the IWC and a history of the developmental work in those ... CCAMLR and the IWC. Author(s): Constable, A. Title: Models of Antarctic marine ecosystems in support of ... is currently in draft form open to comment and is being developed to provide an introduction to the ... organisations. It also provides an outline of the nature of modelling for these purposes and the general issues ...
Meeting Document : CCAMLR-IWC-WS-08/03 : Auteur(s): Constable, A.
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Report of activities performed under support of CCAMLR Scientific Scholarship in 2019
Abstract: A list of events attended by the Scholarship holder for 2019 with the support of the ... CCAMLR Scientific Scholarship is presented. The types of work that have been completed and the knowledge ... Title: Report of activities performed under support of CCAMLR Scientific Scholarship in 2019 Approval ... that is planned to be acquired during the visit to the Mentor are presented. Author(s): I. Slypko ...
Meeting Document : SC-CAMLR-38/BG/23 : Auteur(s): I. Slypko
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Sources of variance in studies of krill population genetics
Abstract: There is a long-term interest in the population genetics of Antarctic krill species ... resurgence of interest in identifying distinct stocks of swarming krill species has been driven by the ... because of their ecological end economic importance. The possibility that there are distinct genetic ... stocks of these species would affect the design of management strategies for conserving them. A recent ...
Meeting Document : WG-EMM-01/12 : Auteur(s): S.N. Jarman and S. Nicol (Australia)
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Feasibility of trawl surveys to estimate abundance of juvenile toothfish in Subarea 88.1
average over the last three years, 63% of the seabed area from 0–600 m depth was not fishable in January ... % in 2002 to 89% in 2002. Less than 10% of the potential trawl survey area was fishable in all three ... Abstract: This report presents results from a desktop study to determine the feasibility of ... and previous research cruises. The major limitation on a trawl survey in the Ross Sea is ice cover. On ...
Meeting Document : WG-FSA-SAM-04/07 : Auteur(s): Wood, B.A., ODriscoll, R.L., Hanchet, S.M.
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On possibility of using acoustic method to improve quality of Champsocephalus gunnari biomass estimates in Subarea 48.3
acoustic and biological data obtained by Russian RN ATLANTIDA in the area of South Georgia Island (January ... Abstract: An attempt has been made to study icefish as an object of acoustic survey basing on the ... obtained from the catches by midwater trawl to those estimated with TS in situ measurements for fish ... recorded within the pelagic zone. Basing on the analysis of acoustic measurements and results of commercial ...
Meeting Document : WG-FSA-00/31 : Auteur(s): S. Kasatkina (Russia)