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  1. Modelling Movement of Antarctic Krill (MMAK): the importance of retention, dispersal and behaviour for krill distribution

    Abstract:  Effective management of the Antarctic krill (Euphausia superba, hereafter krill ... ) fishery requires an understanding of the controls on the distribution and abundance of krill ... .  Particularly important are the pathways and timescales of movement and retention affecting krill distribution ... of the regional and local-scale processes that influence the distribution of krill in CCAMLR Area 48.  Modelling ...

    Meeting Document : WG-EMM-17/31 : Author(s): S. Thorpe, E. Young and E. Murphy

  2. MaxEnt reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia 1996–2000

    Abstract:  We present Maximum Entropy (MaxEnt) reconstructions of krill distribution and estimates ... of mean krill density within two survey boxes of dimensions 80 km x 100 km to the north east and north ... gathered in the boxes in austral summers 1996 – 2000. Krill densities had previously been determined ... 1600 krill density estimates per box. The MaxEnt technique uses a Bayesian approach to infer the most ...

    Meeting Document : WG-EMM-02/36 : Author(s): M.H. Wafy, A.S. Brierley, S.F. Gull and J.L. Watkins (United Kingdom)

  3. Improving mechanistic understanding between larval krill, krill recruitment, and sea ice

    Abstract:  Antarctic Krill, Euphausia superba, is the key species of the Southern Ocean ecosystem ... . Earlier analysis suggested decrease in krill abundance by 50% since the mid 1970’s to early 2000 ... -ice coverage. More recent studies suggest more complex and/or dynamic nature of krill population ... trajectory as well as its link with decadal climatic events. Krill population dynamics is thought ...

    Meeting Document : WG-EMM-18/07 : Author(s): B. Meyer and S. Kawaguchi

  4. The use of predator-derived krill length-frequency distributions to calculate krill target strength

    Abstract:  The relationship between krill abundance and predator performance is fundamental ... to an ecosystem based approach to resource management. We propose a method using krill sampled from the diet ... of predators to provide a length-frequency distribution of krill at times when it is possible to run automated ... operations. This will allow a robust estimate of krill abundance to be estimated from acoustic data. Changes ...

    Meeting Document : WG-EMM-00/42 : Author(s): K. Reid and A.S. Brierley (United Kingdom)

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

    on Antarctic krill commercial fishing vessels, we estimated the relationship between statistical precision ... and sample size by using variance component analysis. Observer datasets on Japanese krill fishery from 1995 ... biological process error in the population dynamics from fishery process as observation error. In both krill ... -temporal variability in size structure of krill population, which is presumably derived from large ...

    Meeting Document : WG-EMM-12/68 : Author(s): T. Okuda and M. Kiyota (Japan)

  6. Modelling growth and reproduction of Antarctic krill: implications of spatial and temporal trends in temperature and food for ecosystem-based management of krill fisheries

    Abstract:  Errors in the growth model used in stock assessments of Antarctic krill, specifically ... higher rates of growth than occur in reality, could inadvertantly lead to over-exploitation of the krill ... population and cause impacts on krill predators.  We review the three classes of models available ... for modelling krill growth – the von Bertalanffy class, the moult-cycle class based on measures of the duration ...

    Meeting Document : WG-EMM-12/38 : Author(s): A.J. Constable and S. Kawaguchi (Australia)

  7. Krill distribution pattern due to water structure and dynamics near the South Sandwich Islands in January–February 2000 (Krill Synoptic Survey 2000)

    and krill distribution is carried out. There are determined three krill groups which differ each other ... by length frequency, maturity stages and waters inhabited. Distribution of the 1st krill group (juveniles 25 ... concentration of krill of the 3rd group (50-56 mm) transported there by ACC waters. Such concentrated schools ... are transported to South from East of archipelago, and may be mixed with krill of the 1st group. It is very ...

    Meeting Document : WG-EMM-00/33 : Author(s): V. Sushin, P. Chernyshkov, V. Shnar, F. Litvinov and K. Shulgovskiy (Russia)

  8. Bridging the krill divide: understanding cross-sector objectives for krill fishing and conservation

    day workshop entitled “Understanding the objectives for krill fishing and conservation in the Scotia ... , to explore each sector’s objectives and information requirements for the krill‐based ecosystem ... and to identify constructive ways for the three sectors to work together. The issue of krill-fishing has ... . This included shared commitment to maintaining a healthy ecosystem and support for management of the krill ...

    Meeting Document : SC-CAMLR-XXXIII/BG/34 : Author(s): United Kingdom, Norway, Chile, ASOC and ARK

  9. Krill Spill: An opportunistic approach to collecting penguin diet and krill length data

    data collection methods as an alternate approach. Data on diet composition and krill length were ... obtained from collecting samples of ‘krill spill’, which comes from regurgitation during chick feeding ... . The krill length frequency of the krill spill sample was compared to data collected utilising the A8 ... alongside A8 monitoring efforts to ensure that krill spill samples accurately represent data collected using ...

    Meeting Document : WG-EMM-18/45 : Author(s): E. Grilly, M. Santos, K. Reid and A. Silvestro

  10. Some aspects of the relation between Antarctic krill abundance and CPUE measures in the Japanese krill fishery. (Component of SC-CAMLR-VI/BG/4)

    Abstract:  The history of the Japanese krill fishery is reviewed briefly. Important aspects ... quality considerations- in particular the increasing tendency to avoid catching "green” krill ... . These factors result in Catch-per-Day and Catch-per-Haul measures being unlikely to index krill abundance ... of indexing the extent of the krill distribution through routine oceanographic monitoring merits attention ...

    Meeting Document : WS-KCPUE-89/03 : Author(s): D.S. Butterworth (South Africa)

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