Résultats de la recherche
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A history of the acquisition and analysis of sea-ice data by CCAMLR
the early years of development of the ecosystem monitoring program sea ice data, especially derived ... from satellite images, was recognised as an important source of information for interpreting changes in ... monitored predator parameters. Standard methods for collection of environmental parameters were agreed in ... source of data, digital images produced by the US National Snow and Ice Data Centre, with a relatively ...
Meeting Document : WG-EMM-96/15 : Auteur(s): Agnew, D.J.
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Krill biomass estimates for two survey boxes to the north east and north-west of South Georgia in January 1996: the beginning of a five-year monitoring program
over the shelf-break to the north-east and north-west of South Georgia. Surveys were conducted from RRS ... -annual variability in the abundance of the Antarctic krill Euphausia superba in the South Georgia region ... -east of Cumberland Bay and encompassed Charlotte Bank, an area where historically whale catches were ... high and where numerous observations of elevated krill abundance have been made. Box 2 was located to ...
Meeting Document : WG-EMM-96/18 : Auteur(s): Watkins, J.L., Murray, A.W.A., Brierley, A.S.
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Sexual ratio of Dissostichus eleginoides from longlines samples: a partial indicator of reproductive migration in Subarea 48.3
Abstract: The examination of the sexual ratio of D. eleginoides between the first week of March ... and the third week of July 1996, in the subarea 48.3 shows that the sex ratio departs from the ... males at size of first maturity join the female population. After the first week of June, the sex ratio ... turns back to a higher number of females. Because the longline remains most of the time close to the ...
Meeting Document : WG-FSA-96/44 : Auteur(s): Moreno, C.A., Guerra, J., Zuleta, A.
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Estimation of size at maturity and calculation of an appropriate size limit for male Paralomis formosa
Abstract: A number of weighted smoothing splines were fit to data on carapace length and size ... -specific, median chela height of Paralomis formosa. The second derivative of the spline which made the best ... tradeoff between goodness of fit and smoothness was used as an estimate morphometric size at maturity ... . Bootstrapping techniques provided a bias-corrected estimate of morphometric size at maturity (sBc) equal to 80 ...
Meeting Document : WG-FSA-96/35 : Auteur(s): Watters, G.
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A comparison of geostatistical and random sample survey analyses of Antarctic krill acoustic data
Abstract: Data from the acoustic surveys of MV SA "Aghulas" and FRV "Walter Herwig ... geostatistical methods. Estimates of mean density (g m-2) of krill and their variances are compared with ... sampling theory. A further high-resolution geostatistical analysis of the MV SA "Aghulas" (ping ... -by-ping) data set of the density of each individual aggregation is also presented. These analyses ...
Meeting Document : WG-EMM-95/76 : Auteur(s): Murray, A.W.A.
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Choice of a procedure for deciding closure of CCAMLR fisheries: a simulation model
Secretariat of CCAMLR, as described in Conservation Measures, have been difficult to implement because of the ... histories are simulated and the performance of four Models for making closure decisions is investigated ... under a variety of circumstances. The Model described in the existing Conservation Measures is shown to ... have a high probability of allowing large over- or under-shoots of the TAC. The most successful model ...
Meeting Document : CCAMLR-X/BG/09 : Auteur(s): Secretariat
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Population assessment of Patagonian toothfish in the north of Subarea 48.4 – 2010 update
Abstract: The target tagging rate of 5 fish per tonne was exceeded by both vessels, with 232 D ... . eleginoides tag recaptures in 2009/10, a total of 72 in all seasons; The length-frequency of 2009/10 captures ... is consistent with the theory that the bulk of the biomass is dominated by a small number of cohorts ... currently assumed for the 48.3 population CASAL estimates of D. eleginoides population size in the North of ...
Meeting Document : WG-FSA-10/39 : Auteur(s): J. Roberts and D. Agnew (UK)
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Pairwise tag performance: testing the sensitivity of the tag detection index and the mortality of tagged fish index
Abstract: Vessel-specific indices of tag detection rates and tagging mortality rates were ... temporal variability of fishing operations by pairing each individual tag release or recapture event with ... and in the same fishing season). The method showed that when the confounding effects of variable ... with respect to the tag detection index in the Ross Sea region. Here we present the results of ...
Meeting Document : WG-FSA-13/50 : Auteur(s): S. Mormede (New Zealand)
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Report on 2015 Activities of the Southern Ocean Observing System relevant to the work of CCAMLR
been steadily developing its work. In this paper, we summarise the outcomes of strategic planning over ... . These are described more fully in the paper. In conclusion, we discuss the value of developing a ... 2015 and a recent meeting of the SSC and workshop aimed at implementing the strategic plan. SOOS is ... of the CCAMLR area. The capability working groups aim to develop long term capabilities of SOOS ...
Meeting Document : WG-EMM-15/61 : Auteur(s): A. Constable (Australia), O.R. Godø (Norway) and L. Newman (SOOS)
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Preliminary results of age determination of the Dissostichus spp. from the longline catches in 48.2 Subarea (2015, SIMIIZ)
Abstract: Age determination of the Patagonian (Dissostichus eleginoides) and Antarctic toothfish ... the Ukrainian vessel “Simeiz” in the Northern part of Weddell Sea (statistical Subarea 48.2) in March ... 2015. 124 otolith pairs of Dissostichus mawsoni and 87 otolith pairs of Dissostichus eleginoides were ... sampled; one otolith from each pair was used for age determination. Preliminary results of age ...
Meeting Document : WG-FSA-15/46 : Auteur(s): Delegation of Ukraine