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A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty
) 1.21 I 0 10 20 30 40 50 60 Length (mm) Selectivity (b) 1.6 1 1 0 2 4 6 Age (years) Relative ... 1 0.8 0.6 0.4 0.2 0 0 10 20 30 40 50 60 Length (mm) Proportion mature (b) 1.6 0 2 ... Uncertainty (a) Run 1 Biomass (thousand tonnes) Recruits (millions) 0 10 20 30 40 50 Years (b) Run 2 ... Butterworth et al. (1994) where: where l = I(T), the mean length of fish at age T = a + 2, m, and m, are ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Автор(ы): Constable, A. and W.K. de la Mare
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Beyond MSY: a consideration of definitions of management objectives
North Sea plaice for two ages of first capture are shown in Figure 2. Apart from a constant, these ... recruit curve of Figure 2 for a high age at first capture does not reflect the behaviour of the total ... largest stock in the data series, the MNR for plaice being indeterminate but certainly less than 30 ... (Csirke and Sharpe 1984) suggests that MNR for clupeoid species occurs at stock sizes some 30-50% of the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 299-322 : Автор(ы): Gulland, J.A.
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Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations
are the wet mass m–2 (i.e. bio- mass density) and no. m–2 (numerical density). The current paradigm ... 2) sample from the near surface (typically ~10 m depth for acoustics) down to ~200 m and in areas ... estimates for this area (see Table 2). Survey CCAMLR Area (see Figure 1) Area surveyed (million km2 ... outdated method for estimation of krill biomass Atkinson et al. 222 Table 2: Estimates of total ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Автор(ы): A. Atkinson, S. Nicol, S. Kawaguchi, E. Pakhomov, L. Quetin, R. Ross, S. Hill, C. Reiss, V. Siegel, G. Tarling (submitted to the 2008 Joint CCAMLR-IWC Workshop)
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Scientific Abstracts 2007
. Commission CCAMLR-XXVI/30 The orderly development of the krill fishery. Delegation of Australia, 4 pp ... bands are still being reported as debris from Bird Island. 2 The level of marine debris found in ... (presented as a translation from The Fishing Industry of Ukraine, 1–2/2007: 11–14). Antarctic krill ... justify its use in the first stage of benthic bioregionalisation for CCAMLR waters. SC-CAMLR-XXVI/BG/30 ...
Document : Site Section: Publications
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Scientific Abstracts 2004
, continues to form the major part of the debris associated with seabird 2 colonies. Marine mammal ... gives more information on seamount ecology. SC-CAMLR-XXIII/BG/30 The applicability of international ... . CCAMLR Secretariat, 3 pp. (English, unpublished). 2 WG-EMM-04/10 Results of scientific ... March–June 2003 compared to previous seasons. V.A. Bibik and S.A. Klementiev (YugNIRO, 2 Sverdlov ...
Document : Site Section: Publications
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Cephalopods: Trophic modelling of the Ross Sea
sp. 1 Octopodid sp. 2 Psychroteuthis glacialis. Lu & Williams (1994) caught Psychroteuthis ... glacialis in Prydz Bay in three clusters: (1) 4–18 mm mantle length (ML) - immature; (2) 95–201 mm ML ... that the post hatching life is also probably several years. 2 Carbon content of cephalopod tissue ... 2 Work by Vlieg (1988) found arrow squid dry weight to be 22.5% of wet weight, and ash to be ...
Document : Site Section: Publications
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Homogeneity of Adélie penguins as krill samplers
depredadores. 1 Instituto Antartico Argentino, Cerrito 1248, 1010 Buenos Aires, Argentina 2 Facultad de ... . Finally, we will test the hypothesis that Ad6lie penguins are uniform with respect to prey selection. 2 ... ). Sources of variation were arranged in a nested ANOV A as follows: Level 2: Level 1: Level 0 ... penguins (Level 2) were recaptured at least once during the experiment, yielding a total of 23 samples ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 253–257 : Автор(ы): Marschoff, E. and B. Gonzalez
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Memorandum on EEC participation in the decisive meeting
SPECIALI:. ( Bl1EN0S AIRES OOUJd MEMORANDUM wp/30 Date: 28 July 1978 Original: French ... PRESENTED BY THE DELEGATIONS"' OF BELGIUM 2 FRANCE AND THE UNITED KINGDOM T~.e representatives cf Belgium ...
Document : Site Section: The Organisation
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Field Identification Guide to Heard Island and McDonald Islands Benthic Invertebrates
the Southern Ocean, the guide therefore having national appeal. covers2.indd 113 11/8/09 2:55:44 ... .indd 114 11/8/09 2:55:45 PM !"#$%&'()&"*+(,-&+"(././+!(((0!"#$%&'()&"*+(,-&+"(././+!(((0 ... (890123245(((006476.0(89 2 Contents Sipunculidae Peanut worms 66 Mollusca Class Gastropoda 68 Sea ... ) distant from the continental EEZ in temperate and sub-Antarctic waters (Figure 1 and 2). They are ...
Document : Site Section: Publications
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Field Identification Guide to Heard Island and McDonald Island Benthic Invertebrates
the Southern Ocean, the guide therefore having national appeal. covers2.indd 113 11/8/09 2:55:44 ... .indd 114 11/8/09 2:55:45 PM !"#$%&'()&"*+(,-&+"(././+!(((0!"#$%&'()&"*+(,-&+"(././+!(((0 ... (890123245(((006476.0(89 2 Contents Sipunculidae Peanut worms 66 Mollusca Class Gastropoda 68 Sea ... ) distant from the continental EEZ in temperate and sub-Antarctic waters (Figure 1 and 2). They are ...
Document : Site Section: Science
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