Resultados de la búsqueda
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Towards further development of stock assessment of stock abundance for Subarea 48.6 taking into account the developments since 2012 – a discussion paper
since 2012 and some review of work that could offer lessons in how to advance stock assessment in ... Subarea 48.6 in 2019. Author(s): Delegations of Japan and South Africa Title: Towards further ... development of stock assessment of stock abundance for Subarea 48.6 taking into account the developments since ... Abstract: This paper outlines stock assessment related work that has been done in Subarea 48.6 ...
Meeting Document : WG-FSA-18/66 : Autor(es): Delegations of Japan and South Africa
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2007 krill biomass update of the South Shetland and Elephant Island regions of Area 48
Abstract: Antarctic krill biomass trends in the South Shetland Island region of Area 48 are ... 2007), acoustic biomass estimates previously presented at the 2006 WG-EMM meeting in Namibia (WG-EMM-06 ... /32). In 2007, biomass in the South Shetland Islands region exceeded 19 million tons. This increase ... from Author(s): C.S. Reiss and A.M. Cossio (USA) Title: 2007 krill biomass update of the South ...
Meeting Document : WG-EMM-07/31 : Autor(es): C.S. Reiss and A.M. Cossio (USA)
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Utilising data from ecosystem monitoring for managing fisheries: development of statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program
appeared in the data. An alternative procedure, using estimates of the mean and variance of baseline time ... correlated (>0.6). Criteria for inclusion of parameters in the indices are discussed when parameters are ... statistical procedure adopted by WG-EMM in 1996 for identifying anomalies in CEMP parameters. The power of the ... statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program Abstract / Description ... values have appeared in the data. An alternative procedure, using estimates of the mean and variance of ... systematic shift in mean level. A randomisation procedure could be tested for the identification of drift ... correlated (>0.6). Criteria for inclusion of parameters in the indices are discussed when parameters are ... statistical procedure adopted by WG-EMM in 1996 for identifying anomalies in CEMP parameters. The power of ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 101–117 : Autor(es): de la Mare, W.K. and A.J. Constable
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Problems of population age structure determination of Euphausia superba Dana using an example from the Antarctic Peninsula area and adjacent waters
examines the size structure of populations of E. superba in relation to their habitat, on the basis of an ... analysis of data collected by the author during the 1981 season in the region of the Antarctic Peninsula ... similar conditions. Hypotheses are formulated regarding the age and growth of E. superba; in addition ... , data are cited on the growth rates of krill in relation to feeding conditions, temperature factors and ... populations of E. superba in relation to their habitat, on the basis of an analysis of data collected by the ... author during the 1981 season in the region of the Antarctic Peninsula and the South Shetland Islands ... . Hypotheses are formulated regarding the age and growth of E. superba; in addition, data are cited on the ... in the size composition of krill, modelling of growth under various conditions and physiological and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 227-270 : Autor(es): Spiridonov, V.A.
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Reconciling theoretical versus empirical target strengths of krill; effects of phase variability on the distorted wave Born approximation
, the authors noted that the differences were not entirely due to noise. In this study, the accuracy of ... elements of a discretized bent cylinder (krill model) causes a dramatic flattening in the side-lobe regions ... Abstract: A model was recently proposed to predict the target strengths (TS) of Antarctic krill ... ]. Based on the distorted wave Born approximation (DWBA), the model depends upon the coherent summation of ...
Meeting Document : WG-EMM-02/50 : Autor(es): D.A. Demer and S.G. Conti (USA)
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Modelling Movement of Antarctic Krill (MMAK): the importance of retention, dispersal and behaviour for krill distribution – a project update
that influence the distribution of Antarctic krill in CCAMLR Area 48, focussing in particular on the ... investigate the impact of physical and behavioural processes on the distribution of krill in this area, at ... being investigated, which will include examination of the role of tides in determining on-shelf ... Antarctic Wildlife Research Fund, to improve current understanding of the regional and local-scale processes ...
Meeting Document : WG-EMM-18/06 : Autor(es): S.E. Thorpe, E.F. Young, E.J. Murphy, O.R. Godø and A.H.H. Renner
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Population demography of Antarctic fur seals: the costs of reproduction and implications for life-histories
Abstract: 1. This study examined the costs of reproduction in terms of future survival and ... result of pregnancy which accounted for 40–50% of adult female mortality. This effect was greatest in the ... animals having been pregnant in the previous year. 6. Reproduction incurs costs to females, in terms of ... . 2. Population age structures were used, in conjuction with the measured age-specific survival rates ...
Meeting Document : WG-EMM-95/26 : Autor(es): Reid, K., Croxall, J.P., Lunn, N.J., Boyd, I.L.
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Effects of different harvesting strategies on the stock of Antarctic icefish Champsocephalus gunnari around South Georgia
harvesting alternative. In the absence of regular recruit surveys constant fishing at F0.1 is most likely to ... Abstract: The effects of a number of harvesting strategies on the Antarctic icefish ... years after a good recruitment,- pulse fishing at an interval of 3 years with no fishing in between;- a ... shift in partial recruitment values due to changes in net selectivity. For the projections recruitment ...
Meeting Document : SC-CAMLR-VIII/BG/47 : Autor(es): Delegation of Federal Republic of Germany
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A re-analysis of the Kerguelen Shelf and Skiff Bank stocks of Champsocephalus gunnari
-frequency data for the years 1981 to 1990. Cohort analysis yielded a Stock Biomass of 22 711 tonnes in 1988 ... possible declining trend in the abundance of this stock. Author(s): G. Duhamel (France) and D.J. Agnew ... Abstract: Catches of Champsocephalus gunnari from the Kerguelen Shelf and Skiff Bank stocks were ... re-calculated from those used by the Working Group on Fish Stock Assessment in 1989 using length ...
Meeting Document : WG-FSA-90/17 : Autor(es): G. Duhamel (France) and D.J. Agnew (Secretariat)
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Some aspects of size composition dynamics of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea (Statistical Subarea 88.1)
mawsoni) from catches in different statistical areas of the Ross Sea was given. Biological data for two ... both periods of the fishery, in the southern statistical areas (SSRU H, I, K, L), the portion of small ... -sized immature fish had increased though the average size of fish in catches had not changed ... Abstract: The analysis of the data on size composition of Antarctic toothfish (Dissostichus ...
Meeting Document : WG-FSA-12/17 : Autor(es): A.K. Zaytsev (Ukraine)