Search results
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An 8-year cycle in krill biomass density inferred from acoustic surveys conducted in the vicinity of the South Shetland Islands during the austral summers of 1991/1992 through 2001/2002
for delineating volume backscattering due to Antarctic krill, adjusting for signal contamination due to noise ... , and compensating for diel vertical migration of krill outside of the acoustic observation window. Intra-and inter ... -seasonal variations in krill biomass density and dispersion were derived from the re-processed data set ... this variability may be attributed to changes in the spatial distribution of krill relative to the survey area ...
Meeting Document : WG-EMM-03/6 : Author(s): R.P. Hewitt, D.A. Demer and J.H. Emery (USA)
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A simulation study of krill fishing by an individual Japanese trawler
) of a Japanese krill trawler over a half-month period, and the output is compared to statistics from a sample ... , and their performance investigated in response to six different ways in which the overall krill biomass in a 600 n. mile ... be reliable only for detecting changes in within-concentration krill distribution parameters. Other approaches ... and density of krill concentrations. Priority for further analyses should be given to examination of existing ...
Meeting Document : SC-CAMLR-VI/BG/38 : Author(s): D.S. Butterworth (United Kingdom)
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Spatio-temporal variability in the winter diet of larval and juvenile Antarctic krill, Euphausia superba, in ice-covered waters
Abstract: Antarctic krill Euphausia superba is an ecological key species in the Southern Ocean ... and a major fisheries resource. The winter survival of age class 0 (AC0) krill is susceptible to changes ... the spatio-temporal variability of the diet in 4 cohorts of AC0 krill in the Northern Weddell Sea during late ... of overwintering AC0 krill varies significantly in space and time. Variability in stomach content composition ...
Meeting Document : WG-EMM-18/P18 : Author(s): F.L. Schaafsma, D. Kohlbach, C. David, B.A. Lange, M. Graeve, H. Flores and J.A. van Franeker
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A simulation study of krill fishing by an individual Japanese trawler (SC-CAMLR-VI/BG/37)
) of a Japanese krill trawler over a half-month period. It is based on an underlying krill distribution model ... elongating krill swarms, and allowing hauls to continue through more than one swarm. Twenty four candidate ... abundance indices (generally of a CPUE form) for krill biomass in the 600 n.mile square oceanic sector ... modelled are considered, and their performance in response to a variety of ways in which the overall krill ...
Meeting Document : WS-KCPUE-89/04 : Author(s): D.S. Butterworth (South Africa)
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A simulation study of krill fishing by an individual JAPANESE trawler
) of a Japanese krill trawler over a half-month period. It is based on an underlying krill distribution model ... elongating krill swarms, and allowing hauls to continue through more than one swarm. Twenty four candidate ... abundance indices (generally of a CPUE form) for krill biomass in the 600 n.mile square oceanic sector ... modelled are considered, and their performance in response to a variety of ways in which the overall krill ...
Meeting Document : SC-CAMLR-VII/BG/37 : Author(s): D.S. Butterworth (Invited Expert)
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Evaluation of Antarctic krill biomass and distribution off the South Orkney Islands 2011-2015
Abstract: Annual acoustic trawl surveys for krill monitoring have been carried out ... early in the fishing season (January/February), using two different krill fishing vessels as platforms ... years in particular due to ice. In order to allow for comparison of distribution and abundance of krill ... near the South Orkneys among years, we here attempt to generate a coherent series of krill density ...
Meeting Document : WG-EMM-15/54 : Author(s): G. Skaret, B.A. Krafft, L. Calise (Norway), J. Watkins (UK), R. Pedersen and O.R. Godø (Norway)
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The effect of sample size on the observed length distribution of Antarctic krill
Abstract: The appropriate sample size for krill length measurement was raised during the WG-SISO ... on the length data collected by scientific observers onboard the Chinese krill fishing vessel Fu Rong Hai during ... the 2015/2016 fishing season. The variation of statistical property of krill length distribution ... with different sample size was evaluated using simplebootstrap resampling method. Four typical patterns of krill ...
Meeting Document : SC-CAMLR-XXXVI/21 : Author(s): Delegation of China
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Krill fishery information
Abstract: The paper presents a compilation of information and work pertaining to the krill ... between the krill fishery and krill predators; • further development of the plan for the krill fishery ... of the questionnaire on fishing strategy. Author(s): Secretariat Title: Krill fishery information Approval: Approved ... The paper presents a compilation of information and work pertaining to the krill fisheries ...
Meeting Document : WG-EMM-02/6 : Author(s): Secretariat
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ANALYSIS OF SCIENTIFIC OBSERVER DATA FROM THE RUSSIAN KRILL TRAWLER 'MAXIM STAROSTIN' IN THE SOUTH ORKNEY ISLANDS REGION (SUBAREA 48.2) DURING THE SEASON 2008-2009
fishing operations for krill in the Convention area. The vessel used both conventional and continuous ... composition of the krill catches, bycatch, spatial distribution and biological condition of krill. This paper ... during the observation period indicate the presence of several types of Antarctic krill aggregations ... of several successive cohorts. The aggregations with dominance of small-, average- and large-size krill have ...
Meeting Document : WG-EMM-09/29 : Author(s): D. Sologub (Russia)
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Acoustic estimates of krill biomass in the Elephant Island area: 1981-1993
Abstract: Acoustic estimates of krill biomass in the vicinity of Elephant Island for the years ... on previous reports adjusted for the recently proposed definition of krill target strength. Biomass estimates ... xl03 t and 52.8 g/m2. Author(s): D.A. Demer and R.P. Hewitt (USA) Title: Acoustic estimates of krill ... Acoustic estimates of krill biomass in the vicinity of Elephant Island for the years 1981-1993 ...
Meeting Document : WG-KRILL-93/49 : Author(s): D.A. Demer and R.P. Hewitt (USA)