Search results
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Acoustic data analysis and models of krill spatial distribution
Paper Title: Acoustic data analysis and models of krill spatial distribution Abstract ... descriptors of krill spatial aggregation: power spectra for krill biomass fluctuations in space, semivariogram ... (spatial autocorrelation of krill biomass) and the frequency distribution of krill biomass estimate ... distribution of krill biomass is bimodal and appears to be the mixture of two log normal distributions ... SC-CAM LR-VII/BG/25 ACOUSTIC DATA ANALYSIS AND MODELS OF KRILL ... 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 autocorrelation ... of krill biomass) and the frequency distribution of krill biomass estimate. The wavenumber spectrum ...
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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Estimates of circumpolar abundance of Antarctic krill based on recent acoustic density measurements
Paper Title: Estimates of circumpolar abundance of Antarctic krill based on recent acoustic ... density measurements Abstract / Description: The total circumpolar abundance of Antarctic krill ... (Euphausia superba) is estimated using recent measurements of krill density from acoustic surveys ... and historical information on the overall range of krill. The biomass estimates fall between 60 and 155 million ... ABUNDANCE OF ANTARCTIC KRILL BASED ON RECENT ACOUSTIC DENSITY MEASUREMENTS S. Nicol, A.J. Constable ... The total circumpolar abundance of Antarctic krill (Euphausia superba) is estimated using recent ... measurements of krill density from acoustic surveys and historical information on the overall range of krill ... of a large, undetected krill population; and the overestimation of the demand for krill by predators. Even ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 87–99 : Author(s): Nicol, S., A.J. Constable and T. Pauly
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Possible effects of different levels of krill fishing on predators – some initial modelling attempts
Paper Title: Possible effects of different levels of krill fishing on predators – some initial ... suggested by the Joint Meeting of CCAMLR's Working Group on Krill (WG-Krill) and Working Group ... of krill fishing on krill predators. First, estimates are made of the parameters of predator survival rates ... as functions of krill abundance, by considering a krill dynamics model incorporating recruitment fluctuations ... LEVELS OF KRILL FISHING ON PREDATORS - SOME INITIAL MODELLING ATTEMPTS D. S. Butterworth Department ... to develop the modelling framework suggested by the Joint Meeting of CCAMLR's Working Group on Krill (WG ... -Krill) and Working Group for the CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order ... to investigate the possible effects of krill fishing on krill predators. First, estimates are made ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Author(s): Butterworth, D.S. and R.B. Thomson
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Estimating standing stock of krill using maximum entropy
Paper Title: Estimating standing stock of krill using maximum entropy File: 10everson.pdf ... Estimating standing stock of krill using maximum entropy ... of krill using maximum Entropy Inigo Everson Environmental Science Research Centre Anglia Ruskin ... a maximum entropy image reconstruction (MaxEnt) of the krill distribution using data from the CCAMLR-2000 ... Synoptic Survey. The reconstructed distribution is used to estimate the standing stock of krill ... was being developed. As such it does not relate to any spatial scale determined from the krill ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 193 : Author(s): Everson, I
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Genetic variations and population structure of krill from the Prydz Bay region of Antarctic waters
Paper Title: Genetic variations and population structure of krill from the Prydz Bay region ... of Antarctic waters Abstract / Description: Samples of Antarctic krill E. superba from six locations near ... consistent with the hypothesis that all samples were derived from a single breeding population of krill ... . The results of this study agree closely with genetic data from other studies on krill in the Atlantic sector ... STRUCTURE OF KRILL FROM THE PRYDZ BAY REGION OF ANTARCTIC WATERS C.M. MacDonald, R. Williams and M. Adams ... (Australia) Abstract Samples of Antarctic krill E. superba from six locations near Prydz Bay were ... with the hypothesis that all samples were derived from a single breeding population of krill. The results ... of this study agree closely with genetic data from other studies on krill in the Atlantic sector ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 271-273 : Author(s): MacDonald, C.M., R. Williams and M. Adams
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The status of krill (Euphausia superba DANA) resources in CCAMLR Statistical Divisions 58.4.2 and 58.4.3 from 1988 to 1990. Results of acoustic surveys
Paper Title: The status of krill (Euphausia superba DANA) resources in CCAMLR Statistical ... of krill resources in the central part of the Indian Ocean sector of the Antarctic (CCAMLR Statistical ... . It was found that the increase in krill biomass observed in the area in 1990 is linked with the abundant 1986 ... and 1987 year-classes and with a diminished rate of emigration of krill of these year-classes from the area ... WG-KRILL-90/17 THE STATUS OF KRILL (EUPHAUSIA SUPERBA DANA ... carried out biological and ecological monitoring of krill resources in the central part of the Indian ... conducted from 1988 to 1990 are discussed in the paper. It was found that the increase in krill biomass ... rate of emigration of krill of these year-classes from the area in 1989/1990. Resume Depuis 1977 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 163–173 : Author(s): Bibik, V.A. and V.N. Yakovlev
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Determination of Antarctic krill acoustic back-scattering cross-section
Paper Title: Determination of Antarctic krill acoustic back-scattering cross-section Abstract ... / Description: When determining the density krill of concentrations it is necessary to know the acoustic cross ... -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... to determine the acoustic cross-section of the back-scattering of krill. By experiments, the authors have ... - 141 - SC-CAMLR-V/BG/27 DETERMINATION OF ANTARCTIC KRILL ACOUSTIC ... determining the density krill of concentrations it is necessary to know the acoustic cross-section of back ... -scattering of krill. The target strength can be determined in situ by measuring the echo signal from one ... the acoustic cross-section of the back-scattering of krill. By experiments, the author~ have obtained ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 141-152 : Author(s): Protaschuk, V.A. and T.A. Lukashova
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Assessment of krill flux factors in waters of South Orkney Islands during summer 1996
Paper Title: Assessment of krill flux factors in waters of South Orkney Islands during summer ... February to 7 March 1996 to assess krill flux factors in Subarea 48.2. The study area (80 x 240 n miles ... ) and the Weddell Sea. The study area covered sites where high krill concentrations had often been observed ... in the past. The geostrophic transport of krill across boundaries of the study area was calculated ... the results of an experiment conducted from 19 February to 7 March 1996 to assess krill flux factors ... of the Antarctic Circumpolar Current (ACC) and the Weddell Sea. The s tudy area covered sites where high krill ... concentrations had often been observed in the past. The geostrophic transport of krill across boundaries ... m: krill density (g/m3) and water mass transport (m3/sec) per nautical mile of the study area boundary ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 195–204 : Author(s): Kasatkina, S.M., V.N. Shnar, M.I. Polischuk, A.M. Abramov and V.A. Sushin
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Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).
Paper Title: Distribution and size–age composition of Antarctic krill (Euphausia superba ... composition and biological condition of Antarctic krill (Euphausia superba) caught by the Russian krill ... . The distribution of size–age groups in association with particular water masses indicated that age 2+ krill ... as adult Pygmy krill (E. frigida) (of the same size as 1+ krill) were present in the catches. File ... krill (Euphausia superba) is one of the major issues for the management of krill fisher- ies ... . This includes locating areas with high and low krill spawning success. Determining the distribu- tion ... of different age classes of krill is critical for studying the population structure and transport ... of E. superba. Unfortunately, it is not possible to determine the age of krill exactly. However, data ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Author(s): Sologub, D.O. and A.V. Remeslo
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Antarctic krill and ecosystem management – from Seattle to Siena
Paper Title: Antarctic krill and ecosystem management – from Seattle to Siena Abstract ... / Description: This paper outlines CCAMLR’s development of a management approach for the Antarctic krill ... on Krill (WG-Krill). Particular prominence is also attached to the modelling approach developed in order ... to calculate a precautionary catch limit for the krill fishery in various CCAMLR statistical areas. This paper ... –212 175 ANTARCTIC KRILL AND ECOSYSTEM MANAGEMENT – FROM SEATTLE TO SIENA D.G.M. Miller* Marine ... CCAMLR’s development of a management approach for the Antarctic krill (Euphausia superba) fi shery ... of the CCAMLR Ecosystem Monitoring Program (CEMP) and the deliberations of the Working Group on Krill (WG ... -Krill). Particular prominence is also attached to the modelling approach developed in order ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 175–212 : Author(s): Miller, D.G.M