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 ... - age ice cover. The primary set of statistics for yearly com- parisons is the set of yearly means ... 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 ...
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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Options for allocating the precautionary catch limit of krill among small-scale management units in the Scotia Sea
in some of its traditional fishing grounds during years of low krill availability. Under all five options ... years of low krill availability. Under all five options there would be little effect on the existing ... h O rk ne y P el ag ic A re a (S O P A ) 0. 00 64 20 0. 02 07 66 0. 29 85 94 ... Fi gu re 1 : Sm al l- sc al e m an ag em en t un it s (S SM U s) in S ub ar ea ... d in g th e ar ch ip el ag os in t he S co ti a Se a. S SM U s ar e: ( 1) A nt ar ct ... ic P en in su la P el ag ic A re a (A PP A ); (2 ) A nt ar ct ic P en in su la ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 81–97 : Author(s): Hewitt, R.P., G. Watters, P.N. Trathan, J.P. Croxall, M.E. Goebel, D. Ramm, K. Reid, W.Z. Trivelpiece and J.L. Watkins
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Foraging behaviour and reproductive success in chinstrap penguins: the effects of transmitter attachment
Islands. In total, one member of each pair at 20 nests and both members of each pair at 10 nests were ... pair at 20 nests and both members of each pair at 10 nests were equipped with a radio transmitter, 120 ... Islands. In total, one member of each pair at 20 nests and both members of each pair at 10 nests were ... , Washington 98115-0070, USA 291 292 seul membre par couple dans 20 nids, et sur les deux membres des ... B paMKax nporpaMMbI AHTKOM no MOHHTopHHry 3KOCHCTeMbI (CEMP), HCnOJIb30BaHHe pa,llHOTeJIeMeTpHH npH3HaHO ... 6bIJIH npHKpenJIeHbI K O,llHOMY H3 '-IJIeHOB Ka)l{,llOH napbI B 20 rHe3,llaX H 060HM '-IJIeHaM Ka ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 291–303 : Author(s): Croll, D.A., J.L. Bengtson, P.L. Boveng, M.E. Goebel and J.K. Jansen
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1989/1990 stock status and TAC assessment for Patagonotothen brevicauda guntheri in South Georgia subarea (48.3)
the regression equation between fishing mortality and standardized fishing effort for each age-class. Stock has ... mortality and standardized fishing effort for each age-class. Stock has been assessed at 123.1 thousand ... in South Georgia subarea (48.3) Abstract / Description: The 1989/90 stock status and TAC assessments ... of 1989/90 fishing season. File: 08-Shilbanov.pdf ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 101–110 : Author(s): Shlibanov, V.I.
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Detection and quantitative estimation of krill concentrations by hydroacoustic instruments
3 2.107 L 1----. .1- _______ . __ .... __ . ___ _ 30 35 'ID so Figure 1 60 70 80 90 tDO ·120 ISO ... operating at comparatively low frequencies (20-30 kHz) are much less sensitive in registering krill ... des appareils hydroacoustiques sur le navire de recherche Odyssee. On a etabli que le sonar SK-l20 ... bajo del programa FIBEX. Se demostro que el aparato hidroacustico Simrad SK-l20, con el TGV ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Author(s): Yudanov, K.I.
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Otolith and body size relationships in the mackerel icefish (Champsocephalus gunnari)
regression model allowing for parallel lines for each year (F4.846 = 30.57, p < 0.001); including extra ... ) H onpeneneHa HX ~ @ @ ~ K T U B H O C T ~ B n p e ~ c ~ a 3 a ~ ~ n AnHHbI H MaccbI pb16. Ass ... species, otoliths appear to undergo relatively little change as a result of passing through all or part ... Island has been published by Williams and McEldowney (1990). An earlier study by Hecht (1987 ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 117–123 : Author(s): Everson, I., B. Bendall and A. Murray
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Effects of different harvesting strategies on the mackerel icefish Champsocephalus gunnari around South Georgia
on the mackerel icefish (Champsocephalus gunnari) have been simulated for a period of 30 years. These were ... ) have been simulated for a period of 30 years. These were: different levels of constant fishing ... with F increasing three or five years after a good recruitment; pulse fishing at an interval of three years ... to the strength of the incoming year class. An increase of F, however, should not occur earlier than four years ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 77–100 : Author(s): Köster, F.W. and K.-H. Kock
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A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey
And in sMAll-scAle MAnAgeMent units froM the ccAMlr-2000 survey B.G. Heywood and A.S. Brierley Pelagic ... A QuAntified BAyesiAn MAxiMuM entropy estiMAte of AntArctic Krill ABundAnce Across the scotiA seA ... of swarms) to have varying sizes, this is unwelcome. The solution pro- posed by Weir and Djorgovski (1991 ... ), subsequently incorporated into MemSys5, is to concurrently pro- duce a number of ‘hidden’ reconstructions ... area. Density values for the unsurveyed off-transect portions of the survey area were inferred, and ... thus values for total biomass across the survey area, and within individual small-scale management ... estimated due to the sparseness of data in these regions. The MaxEnt formalism allows an objective choice of ... the parameters of the estimation method, and hence an objective choice of the most probable ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 97–116 : Author(s): Heywood, B.G., A.S. Brierley and S.F. Gull
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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
Paper Title: Problems of population age structure determination of Euphausia superba Dana using ... to age groups. It is shown that the size groups of krill are not a seasonal phenomenon, but correspond ... . Hypotheses are formulated regarding the age and growth of E. superba; in addition, data are cited ... factors. Possibilities are outlined for the elucidation of the problem of the age and size structure ... - 227 - SC-CAMLR-V/BG/39 PROBLEMS OF POPULATION AGE ... . The paper addresses the question of whether size groups of E. superba correspond to age groups. It is shown ... regarding the age and growth of E. superba; in addition, data are cited on the growth rates of krill ... are outlined for the elucidation of the problem of the age and size structure of E. superba through the study ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 227-270 : Author(s): Spiridonov, V.A.
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Preliminary report on biological observations and exploratory fishing data collected in the South Georgia area during the 1985/86 cruise of MT Carina
, Notothenia gibberifrons and N. rossii marmorata. Scales and otoliths were also collected for age ... georgianus, Notothenia gibberifrons and N. rossii marmorata. Scales and otoliths were also collected for age ... was represented by three length groups: 20–24, 32–41 and 42–56 cm. N. gibberifrons was also represented by three ... . P. georgianus was represented by three length groups : 20–24, 32–41 and 42–56 cm ... 0 ___ I I i I I I i i I '/9f£J/86 (XII-!) n-687 2 4 6 8 Age grcups (years) 200 O~~~I~~~I~~~I==~~I==~~ 20 3J 40 50 ... 8 20 30 40 ~ Total length (cm) Length and age frequency distribution of Pseudochaenichthys ... 19f!5/86 (XII-I) n-300 2 4 6 8 10+ Age groups (years) O~~==~,==~==~,===;~~,==~==~,==~~ Figure ... Age groups {years) 0 I I I I I I 3) ~ &) 8) 70 00 Total length (cm) Figure 10 Length and age ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 65-97 : Author(s): Kreft, K. and J. Szynaka