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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
obtained using proportions-at-length and fishery- and year-specific age–length keys (ALKs) for years 1998 ... in R, based on alternative ordinary differential equations (ODE) for within-year population dynamics ... 10 15 20 25 2008 Observ ed Fitted Age (years) (a) Age (yrs) P ro po rti on s 0.0 0.1 0.2 ... 0.2 0.3 2006 0 5 10 15 20 25 2007 2008 Observ ed Fitted Age (years) (b) 41 Estimation of M ... 20 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 Age (yrs) S el ec tiv ity , S 'a Age (years) ¢ a S ... 0.05 0.10 0.15 0.20 0.25 0.30 -5 30 0 -5 25 0 -5 20 0 -5 15 0 -5 10 0 -5 05 0 -5 00 0 -4 95 ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Autor(es): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins
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Evaluating the impact of multi-year research catch limits on overfished toothfish populations
assessed in this study indicate that, where a stock has been depleted to at or below 20% of the median ... Paper Title: Evaluating the impact of multi-year research catch limits on overfished toothfish ... is greater than 20 years are shaded light grey and those where recovery is greater than 30 years are ... 30 tonnes per year for 5 years) to assumptions about selectivity (scenarios 7 to 9), size-at ... ch 1.0 0.9 0.8 0.7 0.6 Figure 2: Impact of a 5-year research fishery on recovery 20 years after ... ) Parameter set 1 945 10% 0, 15, 30, 45, 60, 75, 90 As per Table 1 2 893 15% " " 3 841 20% " " 4 782 ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 47–55 : Autor(es): Welsford, D.C
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
50~-------------------------------------------- 40 30 20 10 0 40 50 40 30 20 10 ... together for the analysis (Table 1, data from SRL, 1987 for VIII Region and original data for X Region ... hooks in the VIII Region is presented in Table 3 together with mean length. Length frequency ... size 14/0 I 100 1 10 1 20 130 1 40 150 1 60 1 70 1 80 _ = hook size 3 & 4 [Z] = hook size 14/0 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 107–119 : Autor(es): Moreno, C.A.
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Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longlines
aimed at providing two indirect methods of assessment of depredated biomass over an 11-year period (2003 ... the past 50 years. This is the case for many demersal longline fisheries at high latitudes on both ... 57.2 ± 6.4 79 16 11 568 511 1 679 ± 74 j,k,l 39.2 ± 2.7 105 26 30 683 633 2 568 ± 82 , , ,i j k ... , represented less than 20% of all cells (Cd + Cu). Out of 145 cells in total, 83 were used for killer whales ... whales and 19 cells cg in the presence of killer whales and sperm whales together as both data in the ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 1–14 : Autor(es): Gasco, N., P. Tixier, G. Duhamel and C. Guinet
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Diet study of Antarctic toothfish caught in the east Antarctic based on stomach content, fatty acid and stable isotope analyses
° 95°E Sampling site 5841C 0 1 2 3 4 5 6 0 10 20 30 (32) Cu m ul at iv e n um be r o f ... a lesser extent squid. FA profiles in muscle tissues of Antarctic toothfish were Park et al. 30 ... , 1987; Michener and Schell, 1994). δ13C in an animal usually occurs within 1‰ compared with that of ... (14%). The mixture was shaken, sealed under nitrogen and then heated on a hot block at 100°C for 30 ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 29–44 : Autor(es): Park, H.J. , I. Yeon, E. Han, Y.J. Lee, S.M. Hanchet, G.W. Baeck, Y. Kwon, S.G. Choi, D.W. Lee and C.K. Kang*
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Modelling variability and estimating power to detect change in Adélie penguin fledgling weights
year, but there was no evidence that the rate of decline differed between years. A consequence of this ... the number of birds weighed in each five-day period from 50 to 30 without substantial loss of power ... statistical models were developed from first principles and incorporated both within- and between-year ... at a single time each year, without substantial loss of power to detect change. Further modelling ... birds, or (c) 30 birds each year. Change detected for three to five years of monitoring after change ... ec t c ha ng e 0 4 8 12 16 20 0.0 0.2 0.4 0.6 0.8 1.0 3 years 4 years 5 years b) 50 birds ... % change 0 4 8 12 16 20 0.0 0.2 0.4 0.6 0.8 1.0 c) 30 birds % change (a) (b) (c) % change% change ... = 0.8. 0 4 8 12 16 20 0.0 0.2 0.4 0.6 0.8 1.0 4 years 5 years % change po w er to d et ec t ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 191–200 : Autor(es): Emmerson, L.M., C. Southwell and J. Clarke
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CCAMLR ecosystem monitoring and a feedback management procedure for krill
l'ecosysteme de la CCAMLR met au point une technique pour deceler des baisses it court terme de performance ... alter conservation measures based on options in Article IX of the CCAMLR Convention and dictated by the ... sufficient time to ensure that the objectives set out in Article IT of the CCAMLR Convention are not ... , Article IT can be translated, in the case of the predators, to ask the general question "Will fishing for ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Autor(es): Constable, A.J.
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Effects of weather and sea-ice on the reproductive performance of the Adélie penguin at Edmonson Point, Ross Sea
/99 0 2 4 6 8 10 12 14 16 N u m b e r o f d e a d c h ic k s 0 10 20 30 40 ... 2 4 6 8 10 12 14 16 N u m b e r o f d e a d c h ic k s 0 10 20 30 40 50 60 ... 0 10 20 30 40 50 60 70 80 W in d s p e e d ( k n o ts ) n = 97 n = 76 ... -January. In 2003 the fast-ice again extended about 20 km but, unlike the previous year, it did not ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 99–109 : Autor(es): Olmastroni, S., F. Pezzo, V. Volpi and S. Focardi
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Revised age and growth estimates for Antarctic starry skate (Amblyraja georgiana) from the Ross Sea
been generated that suggest much slower growth, greater ages-at-maturity (about 20 years compared with ... georgiana in the Ross Sea suggested that these skates initially grow very rapidly for about five years ... 6–11 years) and greater maximum ages (28–37 years compared with 14 years). Several pieces of ... (years) 0 10 20 30 40 R ea de r 1 , r ea di ng 2 (y ea rs ) ( m ea n ± 2S E ) 0 10 20 ... underestimated Estimated age (years) 0 10 20 30 40 P el vi c le ng th (c m ) 0 20 40 60 80 100 ... have been generated that suggest much slower growth, greater ages-at-maturity (about 20 years compared ... aged up to about 20 years (Figure 2). However, beyond 20 years, reader 1 consistently aged skates ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 211–220 : Autor(es): Francis, M.P. and M.J. Gallagher
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Scientific observations in CCAMLR fisheries – past, present and future
Measure 41-01 (2004), paragraph 7) (see CCAMLR, 2004b). 0 10 20 30 40 50 60 1996 1997 1998 1999 ... principles outlined in Article II of the CAMLR Convention (CCAMLR, 2004a, Part 1) embody an ‘ecosystem’ and ... provisions of Article II require that management of harvesting should aim to conserve not only the targeted ... )). ______________________________________________________________________ 1 CCAMLR has interpreted Article XXIV of the Convention as ‘requiring the implementation of a ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 81–98 : Autor(es): Sabourenkov, E.N. and E. Appleyard