Search results
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Assessing the power to detect systematic change in Adélie penguin foraging trip duration
constructed and fitted to data collected at Béchervaise Island over a 12-year period when only natural ... , but variability among years was greater in the guard stage. Estimates of variability were used to explore ... or trips sampled diminished rapidly when sample sizes were greater than 30 penguins and three trips per ... of days to weeks, because of the high level of natural between-year variation, it would take many years ... in the single case of 30 years of moni- toring during the crèche period with a Type I error rate of 0.20 ... a number of impact (step, ramp and trend increases of 25%) and monitoring (1–10, 15, 20, 25 and 30 years ... ), and thereafter remains constant (ramp change), and (iii) the effect size is reached after 30 years (0.75 ... monitoring (1–10, 15, 20, 25, 30), and with and without ice cover as a covariate. Power calculations were ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 201–215 : Author(s): Southwell, C., J. Clarke and L.M. Emmerson
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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
proportions-at-length and fishery- and year-specific age–length keys (ALKs) for years 1998 to 2008. A large ... ordinary differential equations (ODE) for within-year population dynamics. These are the BODE model ... obtained using proportions-at-length and fishery- and year-specific age–length keys (ALKs) for years ... in R, based on alternative ordinary differential equations (ODE) for within-year population dynamics ... 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 ... (years) (a) Age (yrs) P ro po rti on s 0.0 0.1 0.2 0.3 0 5 10 15 20 25 1998 2000 0 5 10 15 20 ... -dispersion relative to a Poisson. 0 10 20 30 40 50 0 50 10 0 15 0 Bin Mean Expected Recaptures ... 40 60 0 10 20 30 40 50 Expected Recaptures O bs er ve d re ca pt ur es O bs er ve d re ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Author(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins
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Krill fishing in the Scotia Sea in relation to bathymetry, including the detailed distribution around South Georgia
operated in water depths of about 200 and 500 m over a restricted area of about 30 x 20 km. There were ... enregistrees dans le secteur de la Georgie du Sud. L'analyse de ces donnees met en evidence une variabilitk ... weeks in a year and at other than a local scale. Krill population dynamics operate over ocean basin ... Statistical Bulletins for each quarter of the year and it is those data that have been used in this study ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 1–17 : Author(s): Murphy, E.J., P.N. Trathan, I. Everson, G. Parkes and F.H.J. Daunt
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A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3
/2000 and 2000/01. Each year fully covered the period 1 October to 30 September, thus including one ... /2000 and 2000/01. Each year fully covered the period 1 October to 30 September, thus including one ... have been at least one encounter with an FPV in a year; no encounters in a year are interpreted as zero ... of fish catch rate was calculated for each area and each year using reported catch and effort data ... . Each year fully covered the period 1 October to 30 September, thus including one summer and one winter ... or S A rg os H el en a 26 -F eb -9 7 20 -A ug -9 7 9 30 3. 49 91 .9 1 14 2 1. 54 ... 5 9 S C is ne V er de 20 -M ar -9 7 30 -M ay -9 7 6 99 .8 4 10 .2 44 4 0. 39 ... W C is ne V er de 20 -M ar -9 7 30 -M ay -9 7 6 36 6. 34 89 .3 29 4 0. 04 ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Author(s): Agnew, D.J. and G.P. Kirkwood
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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 ... . r JIaBHbIM npOMbICJIOM B 30He .lleHCTBH5I KOHBeHIJ,HH AHTKOM 51BJI5IeTC5I npOMbICeJI KPHJI5I. B HaCT05lIQeH ... pa60Te paCCMaTpHBaeTC5I KaKHM 06pa30M MO:>KHO BKJIIOlIHTb B CTpaTeiHIO ynpaBJIeHH5I 3THM npOMbICJIOM ... on options in Article IX of the CCAMLR Convention and dictated by the management procedure (see de la Mare ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Author(s): Constable, A.J.
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
~-------------------------------------------- 40 30 20 10 0 40 50 40 30 20 10 500-2000 m (Females) 50 60 70 80 500-2000 ... % 3~~eKTHBHee KPlOlIKOB N~4. IIcnoJIb30BaHHe Pa3Hoti Ha:>KHBKH He npHBO.llHT K 60JIbmHM Pa3JIHlIH5IM ... for the Patagonian toothfish (Dissostichus eleginoides, Smith, 1898) in Chile started as early as 1955, the year ... in X Region (Valdivia zone). For this reason we consider it possible to pool data from these regions together ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 107–119 : Author(s): Moreno, C.A.
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Diet study of Antarctic toothfish caught in the east Antarctic based on stomach content, fatty acid and stable isotope analyses
° S 90° 95°E Sampling site 5841C 0 1 2 3 4 5 6 0 10 20 30 (32 ... 20 30 (32) Number of stomach samples Figure ... and to a lesser extent squid. FA profiles in muscle tissues of Antarctic toothfish were Park et al. 30 ... ). δ13C in an animal usually occurs within 1‰ compared with that of its diet (DeNiro and Epstein, 1978 ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 29–44 : Author(s): 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
. The statistical models were developed from first principles and incorporated both within- and between-year ... or decrease after an impact. Fledgling weight was found to decline through the fledging period each year ... , but there was no evidence that the rate of decline differed between years. A consequence of this finding is that it may ... be possible to simplify future monitoring, such that fledgling weight is measured at a single time each year ... 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 ... possibilité. La modélisation met également en évidence la possibilité de réduire à 30 au lieu de 50 le nombre ... each year (30, 50 and 100), duration of post-impact monitoring (3, 4 and 5 years), and percentage ... and the limited gain from weighing more than 30 birds each year. This is the case for both one- and two-tailed ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 191–200 : Author(s): Emmerson, L.M., C. Southwell and J. Clarke
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The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
eleginoides) have been fished in the Kerguelen Islands zone for 20 years, firstly with trawlers and more ... for 20 years, firstly with trawlers and more recently with longliners. This is the oldest fishery ... in the Kerguelen Islands zone for 20 years, firstly with trawlers and more recently with longliners ... ‘Kerpêche’ for trawlers (split- years – 1 July to 30 June – 1979/80 to 2000/01) and in Excel tables ... during the year was studied to determine the spawning period. Mature animals (stages 3 to 5) only were ... between the two years is impossible, since the samples are not orthogonal (the number of animals caught ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Author(s): Lord, C., G. Duhamel and P. Pruvost
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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 ... of depredated biomass over an 11-year period (2003 to 2013), accounting for spatial variations of depredation ... biomass over an 11-year period (2003 to 2013), accounting for spatial variations of depredation levels ... years. This is the case for many demersal longline fisheries at high latitudes on both hemispheres ... fishery operates year-round, but within the Crozet Islands EEZ, 35% of fishing activity occurs ... 568 511 1 679 ± 74 j,k,l 39.2 ± 2.7 105 26 30 683 633 2 568 ± 82 , , ,i j k llanded ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 1–14 : Author(s): Gasco, N., P. Tixier, G. Duhamel and C. Guinet