Search results
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The utilization of seabird censuses for krill monitoring
2(BepTJilKanbHYIO). CTaH~JilJiI, BO BpeMR BbmOnHeHJilR KOTOPbIX KOnJilqeCTBO KpJilnR 5bInO OqeH b BenJilKO ... : The possibility of using bird observations made at sea as a means of monitoring krill in the Antarctic ... capable of detecting changes in bird abundance and/or species composition, associated with three levels of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Author(s): Marschoff, E.R., J.G. Visbeek and L.R. Fontana
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New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of the Kerguelen Islands
. n p o r p a ~ ~ a HxTMonnaHKToHHbrx H AOHHbIX TpanOBbIX CTXMOK, BbInO~HIIBUIMXCII KaXnbIe TpM MeCRUa B 0 B H ~ T ~ ~ H H ~ B YaCTM ... variations in abundance have been observed. During the sampling period the 1988 cohort was dominant on the ... . Only once have spawners been observed in large numbers on the inner shelf: during the winter of 1991/92 ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 21–34 : Author(s): Duhamel, G
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
calculated from acoustic data. Changes in the lengthfrequency distribution of krill over a period of a few ... weeks produced a 10% difference in TS, whereas simultaneous samples from predators and nets produced ... robust estimate of krill abundance to be calculated from acoustic data. Changes in the length ... - frequency distribution of krill over a period of a few weeks produced a 10% difference in TS, whereas ... resource management and to understanding the response of predators to environmental changes. In many ... cases variability in prey availability has been inferred from changes in predator performance. Clearly ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Author(s): Reid, K. and A.S. Brierley
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The error of the biomass estimate as a function of survey parameters and the statistics of a density field of krill aggregations
xapaKTepHCTRK nonH nnOTHOCTH KOHqeHTpaqHA pbl6b1 H OT napaMeTpOB caMoA C'beMKH, 6bInH BblBeAeHbl C nOMO ... . -RMI!1c2:5in 2c(.+ Co~~ and R,= R,./(f(/CfJJ 2ol.+jin1:J.. for oorrelation radii in directiona ... the dependence of relative sampling error in a biomass estimate (from a survey) on the statistical ... (sections) serve as survey parameters. The relationships described here can be used in practice for both a ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 213-228 : Author(s): Kizner, Z.I.
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Brief comments on the simulation study made by Professor Butterworth on krill fishing by an individual Japanese trawler
fishing by an individual Japanese trawler Abstract / Description: In this paper, three essential ... values used for the minimum catch rate per overall elapsed time. It is suggested that an improvement in ... Abstract In this paper, three essential questions are raised concerning the simulation study of the ... elapsed time. It is suggested that an improvement in our knowledge of krill distribution is necessary ... -concentration searching times might improve the utility of the data. We commend his efforts in making the ... fishery are useful in estimating the change of within-concentration krill abundance even if searching ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 347–350 : Author(s): Ichii, T. and Y. Endo
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Quantification of Southern Ocean phytoplankton biomass and primary productivity via satellite observations and biogeochemical models (submitted to the 2008 Joint CCAMLR-IWC Workshop)
described, from the Coastal Zone Colour Scanner (CZCS) in the late 1970s through to the Ocean Colour and ... regard to their use in the Southern Ocean. A brief history of algorithms linking ocean colour to primary ... significant spatial and temporal vari- ability in primary productivity. It is also the region of the global ... ocean where models and observations of air–sea CO2 exchange differ most significantly, both in sign ... estimates of all terms in the oce- anic carbon budget, including primary productiv- ity. In this paper ... , satellite and modelling techniques to estimate phytoplankton biomass and primary productivity in the ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 247–265 : Author(s): P.G. Strutton, N.S. Lovenduski, M. Mongin and R. Matear
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Acoustic data analysis and models of krill spatial distribution
/ Description: Acoustic data obtained on 4-5 January 1987 aboard the R/V Professor Siedlecki were used in three ... descriptors of krill spatial aggregation: power spectra for krill biomass fluctuations in space, semivariogram ... obtained on 4-5 January 1987 aboard the RN ProfesSor Siedlecki were used in three descriptors of krill ... spatial aggregation: power spectra for krill biomass fluctuations in space, semivariogram (spatial ... and plays an important role in supporting animal populations such as whales, seals and penguins as ... well as fish. Krill distribution is highly variable in space and time (Marr 1962), and krill often ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 311–329 : Author(s): Morin, A., A. Okubo and K. Kawasaki
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Indices of prey availability near the Seal Island CEMP site: 1990 to 1996
C O r I I a C y W T C I I C . Q ~ M O T ~ ~ @ M Y ~ C K A M L ? A H A e K C a M B YI.ICIIeHH0CTI.I KpI.In5I, I I 0 n y Y e H H b I M I . I C n O M O U b W C e T e B b I X npo6 ... / Description: Four indices of prey availability are calculated from surveys conducted in the vicinity of the ... these indices may be useful in modelling krill predator breeding success as a function of prey ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Author(s): Hewitt, R.P., G. Watters and D.A. Demer
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A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty
, HepeCTa ci IIpOMblCJia H a PaCqeTbI BbInoBa H BbInOBa Ha PeKpyTa. OH^ TaKXe MOXeT IIPHMeHRTbCR An53 ... OqeHKI? BbInOBa COBpeMeHHblX IIPOMblCnOB. A a e ~ c z npWMep no IIaTarOHCKOMy KJIbIKaqy, Dissostichus ... s h o u l d b e main ta ined . Initially, CCAMLR decided that the catch rate from any stock was no t t o exceed ... the spawning stock biomass in accordance with CCAMLR criteria. These specify a bound on the ... specify growth, mortality, age-dependent selectivity and seasonal patterns in fishing mortality. Results ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Author(s): Constable, A. and W.K. de la Mare
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Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?
index of a morphometric characteristic? Abstract / Description: In sexually dimorphic species ... avoiding the necessity of sex determination. However, uncertainty in sex ratios can lead to considerable ... * Abstract In sexually dimorphic species, morphometric characteristics have separate distributions for ... determination. However, uncertainty in sex ratios can lead to considerable Type I and Type II errors. Lack of ... discriminante en la determinaci6n del sexo. 1. INTRODUCTION In sexually dimorphic species, morphometric ... recognised this problem, in 1991 noting that analyses by Scolaro et al. (1990) and Kerry et al. (1992) had ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Author(s): Agnew, D.J.