Search results
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The krill distribution in waters around the South Shetland Islands: Preliminary results from an acoustic survey conducted by a Chinese krill fishing vessel in December 2013
data for the estimation of krill stock and its management. In December 2013, a trial acoustic survey ... was conducted by the Chinese krill fishing vessel ‘FURONGHAI' in waters around the South Shetland Islands ... . Krill was found in most part of the survey area. The mean Sv of krill swarm tend to be higher in inshore ... . The majority of the krill swarms were found in the upper 100 m with a thickness less than 30 ...
Meeting Document : WG-EMM-14/47 : Author(s): X. Wang, X. Zhao, G. Qi, T. Zuo, J. Zhu, J. Zhang and X. Li (People’s Republic of China)
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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
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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)
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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
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Successful ecosystem-based management of Antarctic krill should address uncertainties in krill recruitment, behaviour and ecological adaptation
Abstract: Antarctic krill, Euphausia superba, supports a valuable commercial fishery ... in the Southwest Atlantic, which holds the highest krill densities and is warming rapidly. The krill catch ... , with the main goal of safeguarding the large populations of krill dependent predators. Here we show ... that, because of the restricted distribution of successfully spawning krill and high inter-annual variability ...
Meeting Document : SC-CAMLR-39/BG/24 : Author(s): B. Meyer, A. Atkinson, K.S. Bernard, A.S. Brierley, R. Driscoll, S. Hill, E. Marschoff, D. Maschette, F.A. Perry, C.S. Reiss, E. Rombolá, G. Tarling, S.E. Thorpe, P.N. Trathan, G. Zhu and S. KawaguchiB. Meyer, R. Driscoll, SCAR and S. Kawaguchi (on behalf of all authors)
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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)
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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)
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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)
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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)
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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