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  1. A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies

    parameters. A young-age adjustment (less than 5 years old) to the VB model is also given in order to give ... obtained using IWLS-estimated parameters. A young-age adjustment (less than 5 years old) to the VB model ... than 20 years in age. This is due to the combined effect of natural and fi shing mor- tality ... for ages in the 8– 20 year range. This translated to larger predictions for the MLPLB-fi tted curve ... with those obtained using IWLS-estimated parameters. A young-age adjustment (less than 5 years old ... des jeunes poissons (moins de 5 ans d’âge), afi n de donner des prédictions plus réalistes de la ...

    Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Author(s): Candy, S.G., A.J. Constable, T. Lamb and R. Williams

  2. Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands

    deployed at a level of 30 m from the surface because at this level krill concentrations are most frequently ... drogues deployed at a level of 30 m from the surface because at this level krill concentrations are most ... conducted in December/February 1990/91 by RV Kaiyo Maru was comprised of two legs. The first one covered ... in shallow areas. Water samples were obtained from 11 depth levels (0, 10, 20, 30, 40, 50, 75, 100, 125, 150 ... suggests two factors responsible for krill concentration. One is a convergent accumulation of krill ... to assume that these two factors worked together, and resulted in a marked increase of krill abundance over ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Author(s): Ichii, T., H. Ishii and M. Naganobu

  3. The utilization of seabird censuses for krill monitoring

    , TaKMM 06pa30M, HBMTCH Jl~eKTI1BHbIM cpeACTBOM AnH llonyqeHMH CTaTWCTWqeCKWX KpMTepweB 3HaqWMOCTM ... conditions in two consecutive years. Moreover, other parameters of value to the ecosystem are still less ... cOBnaAeHWH He BWHBwn HWKaKMX HenocpeAcTBeHHO CBH3aHHblX C KpwneM MCTOqHWKOB OTKnOHeHwH. OKa3anOCb. qTO ... the pressure of fisheries. It was the case with whales, seals, fishes, etc. While the mentioned species ... databases, calling for international cooperation on the subject. File:  16-Marschoff-et-al.pdf ... Paper Title:  The utilization of seabird censuses for krill monitoring Abstract / Description ... correspondence analysis. Contour plotting, profile analysis and tests for equality of covariance matrices proved ... technique will allow the discrimination of krill levels by means of bird counts thereby providing an ...

    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

  4. Analysis of variability of krill size and fish by-catch in the Japanese krill fishery based on scientific observer data

    Bayesian model. The models were composed of multistage cluster units (i.e. year, subarea, vessel, cruise ... estimated by the Markov chain Monte Carlo (MCMC) method hardly show difference among years, subareas ... and vessels. The potent interaction effect between year and subarea suggests large spatio–temporal variability ... units (i.e. year, subarea, vessel, cruise and haul) based on a state–space model, separating ... th (m m ) 60 50 40 30 20 (a) Adult size in Subarea 48.1 Overall trend Year E st im ... Year E st im at ed m ea n le ng th (m m ) 60 50 40 30 20 (c) Adult size in Subarea ... 40 30 20 (e) Year Area Y–A Ves. Cruise Haul Ind. Va ria ... an on-board scientific observer on all vessels on at least one cruise each year, and (iii) recognise ...

    Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 31–47 : Author(s): Okuda, T. and M. Kiyota

  5. Distribution, biomass and characteristics of the Euphausia superba fishery around South Georgia (Subarea 48.3)

    , usually one or two weeks. The design used for Survey 2 (a survey plus and separate research ... H3MeHQHBOCTH H WHpOKoro ,l{Hana30Ha nOJIYQeHHbIX 3HaQeHHU 6HOMaCCbI, QTO B CBOIO OQepe,l{b npHBO,l{HT ... K HeOnpe,l{eJIeHHOCTH B o~eHKe 6HOMaCCbI KPHJI5I B 3TOM paUOHe. TaKHM 06Pa30M, MO)l{HO 6bIJIO C,l{eJIaTb ... biomasa mas fiables. 125 1. IN1RODUCflON The South Georgia area holds a special place among those ... recent findings is discussed in this paper. There has been less focus on data concerning krill biomass ... krill biomass for the area. It was therefore only possible to begin to explain the reasons for the ... favourable for krill aggregations its biomass around South Georgia is approximately 400-800 thousand tonnes ... . Unfavourable conditions correspond to a biomass of an order of magnitude less. Short-term fluctuations of krill ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 123–147 : Author(s): Latogursky, V.I., R.R. Makarov and L.G. Maklygin

  6. Target strengths of krill at 136 and 20 kHz

    Paper Title:  Target strengths of krill at 136 and 20 kHz Abstract / Description:  Estimation ... the mean single-krill target strengths range from-71 to-77 dB at 20 kHz. Trawl hydroacoustic method ... Target strengths of krill at 136 and 20 kHz ... lengths from 43 to 47 mm the mean single-krill target strengths range from -71 to -77 dB at 20 kHz. Trawl ... : • frequency 20 kHz: aluminium, diameter 120 mm, TS = -30.92 dB • frequency 30 kHz: brass, diameter 100 mm, TS ... :20 1.3 -74.3 -75.4 53.9 3.9 1.19 20:30 0.14 -77.5 -69.0 54.2 5.7 1.23 Maude Rise area (February ... Encaged krill 136 TS = 0.39L - 86.50 (4) 0.87 Encaged krill 20 TS = 1.27L - 131.30 (5) 0.84 Trawl ... % 24 21 18 15 I2 . 9 6 3 0 10 20 30 40- 50 Figure 1. Krilllength composition. South ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Author(s): Kasatkina, S.M.

  7. Potential interactions between wandering albatrosses and longline fisheries for Patagonian toothfish at South Georgia

    , wandering albatross INTRODUCTION Over the last 20 years wandering albatross (Diomedea exulans ... % of their uplinks were over the South Georgia shelf, most of the remainder being in one or two specific areas ... of their breeding season (which lasts and involved a total of five vessels, only one almost one complete year ... to identify any times of the year when the potential for albatross mortality associated with longline ... Paper Title:  Potential interactions between wandering albatrosses and longline fisheries for ... Georgia wandering albatrosses (Diomedea exulans) and local longline fishing for Patagonian toothfish ... comprehensive use, we recommend that the South Georgia longline fishery for D. eleginoides should be managed in ...

    Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 101–110 : Author(s): Croxall, J.P. and P.A. Prince

  8. A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship in Subarea 48.3

    were kept in tanks with seawater replacement for at least 12 hours after tagging. On one vessel, fish ... with a variety of injuries were selected to see if this affected recovery. In the final analysis, 396 animals ... were included, with an overall survivorship of 90%. Smaller animals and animals in better initial ... condition had a higher survivorship than large animals and those in poor condition. The results suggest ... Georgia installed one or two tanks with which to test post-tag survivorship. These tanks were either ... ), this is probably lower than one would expect in normal tagging operations, when only animals in good condition ... A study of PAtAgoniAn toothfish (Dissostichus eleginoiDes) Post-tAgging survivorshiP in subAreA 48.3 ... for at least 12 hours after tagging. On one vessel, fish with a variety of injuries were selected to see ...

    Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 279–289 : Author(s): Agnew, D.J., J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward, L. Jones, G. Breedt, S. Du Plessis, J. Van Heerdon and G. Moreno

  9. Distribution and relative abundance of Antarctic toothfish (Dissostichus mawsoni) on the Ross Sea shelf

    2004, the highest catches have been taken consistently from SSRU 881H, and in the past two years ... longline survey to monitor this part of the population. Résumé Cet article résume les connaissances sur ... 88.1 and 88.2 for all years up to, and includ- ing, the 2007/08 fishing year. The observer data used ... and 88.2 for all years up to, and including, the 2007/08 fishing year. Data error checking and grooming ... , with some evidence for an ontogenetic migration from east to west as they grow. From the fisheries data ... Paper Title:  Distribution and relative abundance of Antarctic toothfish (Dissostichus mawsoni) on ... relative abundance of Antarctic toothfish (Dissostichus mawsoni) on the Ross Sea shelf (defined here as the ... continental shelf out to the edge of the shelf break at about 600–800 m depth). The focus is on D. mawsoni ...

    Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 33–51 : Author(s): Hanchet, S.M., S. Mormede and A. Dunn

  10. Population genetic structure of Patagonian toothfish in the West Indian Ocean sector of the Southern Ocean

    (n = 2) Islands were typed using two fragments of mitochondrial DNA (mtDNA) and seven nuclear microsatellite loci ... using two fragments of mitochondrial DNA (mtDNA) and seven nuclear microsatellite loci. MtDNA haplotype ... ) Crozet Islands Crozet 2 December 2001 60 732.20 (18.61) Kerguelen Islands Kerguelen 9 December 2001 30 ... using two fragments of mitochondrial DNA (mtDNA) and seven nuclear microsatellite loci. MtDNA haplotype ... the start of commercial exploitation, approximately 17 years ago, within the area of application of CCAMLR ... ). These fi sh had been at liberty for 0.7 to 3.8 years, demonstrating that under some circumstances ...

    Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 21–32 : Author(s): Appleyard, S.A., R. Williams and R.D. Ward

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