Resultados de la búsqueda
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Models of Antarctic marine ecosystems in support of CCAMLR and IWC: background
Abstract: Ecosystem models are being developed to explore a range of issues globally. This paper ... to the use of ecosystem models in CCAMLR and the IWC and a history of the developmental work in those ... organisations. It also provides an outline of the nature of modelling for these purposes and the general issues ... CCAMLR and the IWC. Author(s): Constable, A. Title: Models of Antarctic marine ecosystems in support of ...
Meeting Document : CCAMLR-IWC-WS-08/03 : Autor(es): Constable, A.
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Abundance, size and maturity of krill (Euphausia superba) in the krill fishing ground of Subarea 48.1 during 1990/91 austral summer
north of the South Shetland Islands from 18 January to 3 February 1991. Distinct offshore-inshore ... heterogeneities in abundance and maturity of krill were observed. The survey region was divided into four zones ... ; oceanic, slope frontal, neritic and nearshore zones. The mean density of krill was low in the oceanic zone ... (95% confidence limit), of which 1.22 ± 0.42 million t was concentrated in the fishing grounds (" ...
Meeting Document : WG-KRILL-92/26 : Autor(es): T. Ichii, H. Ishii and M. Naganobu (Japan)
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Method for data treatment of biological samples of multidimensional parameters applied to: Euphausia superba Dana (krill) (+) (received too late for discussion during meeting)
Abstract: The method here described permits to overcome the gaps in the knowledge of the age of ... krill individuals by means of a data process deigned to obtain criteria for the coherent selection and ... grouping of such data. Author(s): J.S. Panizza, A.P. Tomo, E. Marschoff and C. Massigoge (Argentina) Title ... : Method for data treatment of biological samples of multidimensional parameters applied to: Euphausia ...
Meeting Document : WG-DCH-84/28 : Autor(es): J.S. Panizza, A.P. Tomo, E. Marschoff and C. Massigoge (Argentina)
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Preliminary analysis of toothfish catch, CPUE, size structure and mark-recapture data from SSRUs 486A and 486G, with comments on the sustainability of different harvest levels
in Subarea 48.6 north of 60°S (the combined SSRUs 48.6A and 48.6G). A preliminary assessment for D ... . mawsoni in Subarea 48.6 south of 60°S (the combined SSRUs 48.6B through 48.6E) is given in an Appendix. An ... track of the number of tagged animals in the population and to predict the number of recaptures per year ... . The method includes recaptures for the year of release. The tagging likelihood term is based on the ...
Meeting Document : WG-FSA-12/31 : Autor(es): E. Thomson and M. Bergh (South Africa)
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Sensitivities in the assessment of the Patagonian toothfish (D. eleginoides) in Subareas 48.3 and 48.4 to truncation of tagging data
Abstract: The assessment of toothfish in CCAMLR subarea 48.3 currently uses the first four years ... of tag recaptures post release as input data, whereas the assessment in subarea 48.4 uses all ... available recapture data (excluding in-year recaptures). A theoretical analysis of the use of data from ... . Sensitivity tests on the 48.3 assessment show that this bias is not entirely explained by the effect of double ...
Meeting Document : WG-SAM-17/35 : Autor(es): T. Earl
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Proposal to continue the time series of research surveys to monitor abundance of Antarctic toothfish in the southern Ross Sea, 2018–2022
years, 2018–2022. The first objective of the survey is to monitor toothfish recruitment in the southern ... Ross Sea (core strata). This is a continuation of the yearly time series of research surveys of these ... of the diet of Type C killer whales and Weddell seals. The third objective is to collect and analyse ... a wide range of data and samples from these areas (e.g. benthic invertebrates, stomach and tissue ...
Meeting Document : WG-SAM-17/39 : Autor(es): S.M. Hanchet, K. Large, S.J. Parker, S. Mormede and A. Dunn
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Proposal to continue the time series of research surveys to monitor abundance of Antarctic toothfish in the southern Ross Sea, 2018–2022
years, 2018–2022. The first objective of the survey is to monitor toothfish recruitment in the southern ... Ross Sea (core strata). This is a continuation of the yearly time series of research surveys of these ... of the diet of Type C killer whales and Weddell seals. The third objective is to collect and analyse ... a wide range of data and samples from these areas (e.g. benthic invertebrates, stomach and tissue ...
Meeting Document : WG-FSA-18/41 : Autor(es): S.M. Hanchet, K. Large, S.J. Parker, S. Mormede and A. Dunn
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Extension of the development of a management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
take account of the different selectivities of past longline and pot fisheries. These models are used ... for trials of a candidate Management Procedure (MP) which could provide future TAC recommendations for ... this resource. The MP uses two data sources: the recent trend in longline CPUE and the mean length of ... the catches made. This MP provides encouraging performance over the wide range of scenarios considered ...
Meeting Document : WG-SAM-07/10 : Autor(es): A. Brandão and D.S. Butterworth (South Africa)
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An investigation of avoidance by Antarctic krill of RRS James Clark Ross using the Autosub-2 autonomous underwater vehicle
of RRS James Clark Ross in the northern Weddell Sea and in the Bransfield Strait to assess avoidance ... of the research vessel by Antarctic krill Euphausia superba. The AUV was equipped with the same type ... of scientific echosounder as the research vessel (Simrad EK500 operating at 38 kHz and 120 kHz) and ... measured the density of krill along transect acoustically (g m-2 wet mass) prior to the ship’s arrival. We ...
Meeting Document : WG-EMM-01/14 : Autor(es): A.S. Brierley, P.G. Fernandes, M.A. Brandon, E. Armstrong, D.G. Bone and the Autosub Team (United Kingdom)
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Impacts of cetaceans on the structure of Southern Ocean food webs
structure and dynamics of the Southern Ocean food web. These should be considered in addition to several ... -predator removal are not a novel concept. While we acknowledge the correlative nature of our examples, we ... lend themselves to this technology. While much of what we relate cannot be easily resolved using remote ... of a broader scientific basis for management of Antarctic marine resources, which are increasingly ...
Meeting Document : WG-EMM-09/P04 : Autor(es): D. Ainley, G. Ballard, L.K. Blight, S. Ackley, S.D. Emslie, A. Lescroël, S. Olmastroni, S.E. Townsend, C.T. Tynan, P. Wilson and E. Woehler