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Some comments on the procedure for testing estimators of krill abundance which utilise survey data
on the distributions from surveys. ‘Two-level’ models of krill distribution are considered. These achieve overall ... concentrations; these concentrations are then located at random within the survey area. These ‘two-level’ models ... patterns, which are compatible with existing information on the distributions from surveys. ‘Two ... ; these concentrations are then located at random within the survey area. These ‘two-level’ models provide ... is that the data are collected along one-dimensional transects, whereas it is a two-dimensional structure which ... ). One simple approach to generating spatially correlated data is to use a two stage process. Thus ... on the distributions from surveys. "Two-level" models of krill distribution are considered. These achieve overall ... concentrations; these concentrations are then located at random within the survey area. These "two-level" models ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Author(s): Butterworth, D.S., D.L. Borchers and D.G.M. Miller
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Diet study of Antarctic toothfish caught in the east Antarctic based on stomach content, fatty acid and stable isotope analyses
. Two FAs, decosahexaenoic acid (C22:6n3) and eicosapentaenoic acid (C20:5n3), were the most abundant ... ° 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 ... Paper Title: Diet study of Antarctic toothfish caught in the east Antarctic based on stomach ... for Antarctic toothfish (Dissostichus mawsoni) in the small-scale research unit (SSRU) 5841C in the ... toothfish stomachs. Stomach content analyses showed that Antarctic toothfish fed primarily on fish and to a ... between them. δ 15 N values of Antarctic toothfish were higher than for the other species collected ...
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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Evidence to support the annual formation of growth zones in otoliths of Antarctic toothfish (Dissostichus mawsoni)
mode. This indicates that the modes represented year classes and that one translucent zone is formed ... represented year classes and that one translucent zone is formed annually in otoliths of juvenile D. mawsoni ... the Ross Sea (CCAMLR Subarea 88.1) have been aged assuming that one translucent zone is formed annually ... , and the translucent zones counted. Zone counts were consistent within modes, and increased by one in each consecutive ... represented year classes and that one translucent zone is formed annually in otoliths of juvenile D. mawsoni ... °30’E), approximately 450 n miles north of the tagging site. Two of the six fi sh had no immedi ... value of the actual number of years between these two episodes (Table 2). Images from the otolith ... esti- mated from the photographs was one year less than the actual time. On re-examination it was ap ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 125–138 : Author(s): Horn, P.L., C.P. Sutton and A.L. DeVries
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Revised estimates of seabed areas within the 500 m isobath of the South Orkney Islands (subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish
increased from 5 to 30% for eight species and decreased by 20% for one. ... examined, the point estimate of total biomass increased from 5 to 30% for eight species and decreased by 20 ... and 250-500 m depth intervals. The updated estimates are about 1 424 (20%) n miles larger in area within ... % for one. File: 12jones.pdf ... OqeHKa o6qet ~ H O M ~ C C ~ I BO3pOCna Ha 5-30% AJIR 8 BHAOB M COKpaTHJIOCb Ha 20% AnR OifHOrO ... by 20% for one. Une carte bathymetrique revisee des iles Orcades du Sud (sous-zone 48.2) est creke en ... biomasse totale a augmente de 5 a 30% pour huit especes et diminuk de 20% pour la neuvieme. Eb1JTa ... no HHTerPHPOBaHHbIM 6 a 3 a ~ AaHHbIX An2 50-M~TPOB~IX rOPH30HTOB. P ~ C Y ~ T ~ I OCHOBbIBZUIllCb Ha ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 197–204 : Author(s): C.D. Jones
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Temporal variability and the interrelationships between CEMP parameters collected on Adélie penguins at Béchervaise Island
examined for Adélie penguins over a period of 12 years. Data were collected from 1990/91 to 2001/02 ... of chicks when two-thirds were crèched and fully crèched chick counts) display large temporal variability ... while other parameters, such as arrival counts and incubating nest counts, are more stable between years ... and the interrelationships between these parameters were examined for Adélie penguins over a period of 12 years. Data ... / 19 90 14 / 11 / 19 90 17 / 11 / 19 90 30 / 11 / 19 90 05 / 12 / 19 90 20 ... / 19 92 20 / 11 / 19 92 04 / 12 / 19 92 07 / 12 / 19 92 30 / 12 / 19 92 26 ... / 19 97 14 / 11 / 19 97 16 / 11 / 19 97 30 / 11 / 19 97 03 / 12 / 19 97 20 ... / 20 00 17 / 11 / 20 00 02 / 12 / 20 00 04 / 12 / 20 00 04 / 01 / 20 01 30 ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 75–90 : Author(s): Emmerson, L.M., J. Clarke, K.R. Kerry and C. Southwell
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Distribution of the Soviet krill fishing fleet in the South Orkneys area (Subarea 48.2) during 1989/90
for the period from 1 November 1989 to 12 June 1990) are presented. During the season, fishing vessels worked one ... hydrodynamic characteristics of the area, for example a complex current around the islands together ... the north-east of the region. The fleet was observed drifting with the current together with krill ... ) are presented. During the season, fishing vessels worked one fishing ground off the northwestern tip ... November 11-15 November 16-20 November 21-25 November 26-30 November Number of Vessels ... 1 November 1989 to 12 June 1990) are presented. During the season, fishing vessels worked one fishing ... hydrodynamic characteristics of the area, for example a complex current around the islands together ... the north-east of the region. The fleet was observed drifting with the current together with krill ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 51–62 : Author(s): Sushin, V.A
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The sensitivity of multiple output statistics to input parameters in a krill–predator–fishery ecosystem dynamics model
multiple stochastic simulations of 40 years nominally beginning in 2007 and par- titioned into 20 years ... ), and the notation 1970 indicates the sum of values across the two seasons in a year. Subscript s denotes season ... Watters et al. (2013) describe a spatially resolved stochastic simulation model representing one prey ... ., 2004; Hill et al., 2007a; Plagányi and Butterworth, 2012). CCAMLR Science, Vol. 20 (2013): 97–118 ... strategic frameworks for assessing uncertainty in ecosystem dynamics models. Such models have been used ... within CCAMLR to evaluate options for managing the Antarctic krill fishery in the Scotia Sea and southern ... Drake Passage. The model analysed here required 2 311 input values for each of four scenarios and ... recruitment through pre-recruit mortality. A parameter mediating the effect of a forcing function on krill ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 97–118 : Author(s): Hill, S.L. and J. Matthews
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Krill (Euphausia superba Dana) resources and distribution in the Wilkes Land area in the seasons 1986 to 1989
krill aggregations. Two research vessels were simultaneously involved in the survey with one vessel ... focused on the search for exploitable krill aggregations. Two research vessels were simultaneously ... involved in the survey with one vessel conducting commercial krill fishing. The whole survey area from ... krill aggregations. Two research vessels were simultaneously involved in the survey with one vessel ... the 1986 season. Two vessels were annually deployed in the area between 130° and 1500E; one vessel ... to 30 June. Split-year is denoted by the calendar year in which the split-year ends, i.e., 1989 ... -IHeHTaJIbHOrO CKJIOHa. UPI-I OnI-lCaHI-II-I Ka:>K.z:.oro no.z:.patioHa 6bIJIO YKa3aHO KOJII-IlIeCTBO Haxo.z ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 149–162 : Author(s): Dolzhenkov, V.N. and V.P.Timonin
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Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?
a certain proportion of birds. Two overlapping normal distributions are used to show ... Type I and Type II errors. Lack of knowledge about the sex ratio between years makes combining the data ... of individuals, it is only able to correctly sex a certain proportion of birds. Two overlapping normal ... between years makes combining the data a very doubtful procedure and use of a discriminant function ... one year, and all males the next, then the characteristic will appear to have increased in size ... the sex of individuals, it is only able to correctly sex a certain proportion of birds. Two overlapping ... of knowledge about the sex ratio between years makes combining the data a very doubtful procedure and use ... femelles. 11 n'est plus necessaire de determiner les sexes si l'on utilise la procedure qui consiste ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Author(s): Agnew, D.J.
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Supplementary data on exploited stocks in Division 58.5.1 (Kerguelen)
per fishing hour) is, however, lower than those observed for the two preceding cohorts (1979 and 1982 ... per fishing hour) is, however, lower than those observed for the two preceding cohorts (1979 and 1982 ... species has however fluctuated greatly from one year to the next (Table 2) in relation ... observed for the two preceding cohorts (1979 and 1982) in a comparable period. The stock of Notothenia ... Notothenia squamifrons 6bIJI OqeHb HH3KHM.CO BpeMeHH YCTaHOBJIeHH5.I ;;\KOHOMHqeCKOH 30HbI Ha6JIIO ... e/eginoides debido a la carencia de datos recientes de pesca. 149 1 . INTRODUCTION After two seasons ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 147–161 : Author(s): Duhamel, G.