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 ... gathered in the boxes in austral summers 1996 – 2000. Krill densities had previously been determined at ... 1600 krill density estimates per box. The MaxEnt technique uses a Bayesian approach to infer the most ...
Meeting Document : WG-EMM-02/36 : Автор(ы): M.H. Wafy, A.S. Brierley, S.F. Gull and J.L. Watkins (United Kingdom)
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 : Автор(ы): K. Reid and A.S. Brierley (United Kingdom)
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 ... strait. The majority of the krill swarms were found in the upper 100 m with a thickness less than 30 m ...
Meeting Document : WG-EMM-14/47 : Автор(ы): X. Wang, X. Zhao, G. Qi, T. Zuo, J. Zhu, J. Zhang and X. Li (People’s Republic of China)
Analysis of variability of krill size and fish by-catch in Japanese krill fishery based on scientific observer data
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 : Автор(ы): T. Okuda and M. Kiyota (Japan)
Krill distribution pattern due to water structure and dynamics near the South Sandwich Islands in January–February 2000 (Krill Synoptic Survey 2000)
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 ...
Meeting Document : WG-EMM-00/33 : Автор(ы): V. Sushin, P. Chernyshkov, V. Shnar, F. Litvinov and K. Shulgovskiy (Russia)
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 : Автор(ы): A.J. Constable and S. Kawaguchi (Australia)
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’s in the ... -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 to be ...
Meeting Document : WG-EMM-18/07 : Автор(ы): B. Meyer and S. Kawaguchi
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 is ... 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 in ...
Meeting Document : SC-CAMLR-39/BG/24 : Автор(ы): 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)
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 ... the regional and local-scale processes that influence the distribution of krill in CCAMLR Area 48 ...
Meeting Document : WG-EMM-17/31 : Автор(ы): S. Thorpe, E. Young and E. Murphy
day workshop entitled “Understanding the objectives for krill fishing and conservation in the Scotia ... 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 ... krill fishery that minimises the risk of negative impacts on ecosystem health. Participants generally ...
Meeting Document : SC-CAMLR-XXXIII/BG/34 : Автор(ы): United Kingdom, Norway, Chile, ASOC and ARK