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A potential feedback approach to ecosystem-based management: Model Predictive Control of the Antarctic krill fishery
control method known as Model Predic- tive Control (MPC) (Figure 2). Recent advances in algorithms and ... - tives. Figure 2 illustrates the elements of an MPC strategy. The current study mainly addresses the ... and 2 and Equation 8 specify the quantita- tive inputs used in this study: the parameters used in the ... Area 2 Mortality rate (harvested species) M1 = 0.2 M2 = 0.2 Mortality rate (predators) M’1 = 0.05 ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 119–137 : Autor(es): Hill, S.L. and M. Cannon
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Preliminary results of investigations of the Federal Republic of Germany on Notothenia rossii marmorata (Fischer, 1885) in January/February 1985
conbncd to Lhe east and southeast of the island where yields varied beLween 2 and 5100 kg/30 min. 'Ihe ... Ishlnd is still under investigation t!1i~ paper deals mainly with the South Georgia stock. 2 ... (see KOCK, 1985). For estimacing size <'It ,,ex?1al m,'.lturi t)' fii:;h have been grouped in 2 cr.1 ... s.ingle specimens were found in other parts of the shelf. '.).2 Biom£1ss esLimate The biomass ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 33-57 : Autor(es): Kock, K.-H.
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Refinements to the strategy for managing depleted fish stocks based on CCAMLR objectives
20 ou 30 annees it venir. Ces mortalites par peche sont fondees sur des descriptions probabilistes ... conduit pas forcement it un repeuplement du stock en 20 ou 30 ans, et que, par consequent, les stocks ... are below levels near to the population level giving greatest net annual increment (GNAI). (2) The ... with the concepts (1), (2) and (3) above. A further factor to be taken into consideration in some ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 467–475 : Autor(es): de la Mare, W.K. and A. Constable
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Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill
the precautionary catch limit), to a uniform distribution between 0.8 and 2 (annual survivals of 14 ... , 1994b; de la Mare et al., 2002) but produces very similar length- frequency distributions (Figure 2 ... ). As evident in Figure 2, the distributions of length frequencies in 2002 with high proportions of ... areas were high (Table 2). Elephant Island, Joinville and the South area had Pearson correlation ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Autor(es): Kinzey, D., G. Watters and C.S. Reiss
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Distribution characteristics of krill aggregations in the fishing ground off Coronation Island in the 1989/90 season
dawn (2:30 to 3:00 a.m.) and after five a.m. these swarms migrated downwards (Figure 2b). Mean catch ... recorded as "tracks" with clearly defined daily vertical migration. At night-time (from 0 to 2:30) krill ... " ... , I , -, , , 30' i5' 47° 45' 30' i5 1 46° 451 30 ' .. ····i -----2 3 Figure 5: Fishing grounds ... the fishery. 2. MATERIALS AND METHODS Investigations were carried out on board a fishing vessel ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 49–73 : Autor(es): Kasatkina, S.M. and V.I. Latogursky
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Otolith and body size relationships in bigeye grenadier (Macrourus holotrachys) in CCAMLR Subarea 48.3
), reported macrourid by-catch is less, between 1–2% of the total catch weight. However, even in these ... predictive capability of the fi tted models is compared in Table 2. Confi dence Intervals (CI) for ... shown in Figure 2. There are substantial differences in the slope and intercepts of the regression ... explained over 60% of the variation of the data, an improvement on the 30% obtained when using otolith ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 133–143 : Autor(es): Morley, S. and M. Belchier
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Preliminary results of a bottom trawl survey around Elephant Island in October and December 1987
+ 9+ 10+ 11+ 12+ 13+ 14+ 15+ 1 1 2 1 1 1 4 1 4 3 9 1 2 18 1 3 22 3 1 30 2 35 1 1 17 3 ... 1987 are described as follows. 2. MATERIAL AND METHODS Based on the stratification of the shelf by ... varied from 65-458 m. Standard trawling time was 30 minutes. The location of fishing stations is set out ... cm total length) which probably represent age classes 187 1 + and 2+. Other species present ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 185-200 : Autor(es): Kock, K.-H.
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An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data
) - - - - 30 0 - - - - - 30 0 C ha nn ic ht hy id ae (I C X ) - - - 2 - - - - 4 ... grounds rep- resent 31% of the total fishable area (i.e. depth < 2 000 m) in the division. Anomalous or ... missing data Of the 2 063 separate longline sets reported for BANZARE Bank since the fishery commenced ... construct 1 000 bootstrap estimates of parameter values. By considering bootstrap distributions at α/2 and ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 55–78 : Autor(es): McKinlay, J.P., D.C. Welsford, A.J. Constable and G.B. Nowara
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Krill (Euphausia superba Dana) resources and distribution in the Wilkes Land area in the seasons 1986 to 1989
65°30'S. The location of areas where krill aggregations were observed is shown in Figures 2 to 4 ... of 2. Krill aggregations were mostregularly observed between 64°30'-65°33'S, and 131°30'-133°oo'E ... 26.0 2405 625.5 22 Feb to 19 March 2 1987 107 3.7 177 19.0 30 Jan to 8 Feb 3 1987 430 10.3 615 ... the commercial importance of krill aggregations located by the vessel to be evaluated. 2. MATERIALS ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 149–162 : Autor(es): Dolzhenkov, V.N. and V.P.Timonin
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Sea-surface temperature and krill catches around South Georgia in December–February 1989–1991 and 1999–2001
demonstrated by comparing maps of SST differences in January 2001 and January 1991 (Figure 2). In January ... 2001 the mean SST on the northern shelf of South Georgia declined by approximately 1–2°C compared to ... waters to the northwest of Subarea 48.3 (Figure 2). A comparison of January SST anomalies in 1990 and ... 2) on the SST map, which have a resolution of 2° x 2° and are centred at 54°S 41°W and 53°S 37°W ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 165–174 : Autor(es): Vanyushin, G.P