Resultados de la búsqueda
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Broadbandwidth total target strength measurements of Antarctic krill (Euphausia superba) from reverberation in a cavity
Abstract: Total scattering cross-sections (st) of Antarctic krill, Euphausia superba, were ... strengths (??10log(??4?) t TTS), were measured from groups of 57 to 1169 krill (average standard length ... omnidirectional emitter into one of three glass carboys containing groups of krill swimming in 9.3, 19.3 or 45.9 l ... of seawater (0.6??temperature??3.6 °C). Between each pulse, the krill moved within the fixed-boundary ...
Meeting Document : WG-EMM-02/49 : Autor(es): D.A. Demer and S. G. Conti (USA)
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Circumpolar connections between Antarctic krill (Euphausia superba Dana) populations: Investigating the roles of ocean and sea ice transport
Abstract: Antarctic krill, Euphausia superba Dana, has a heterogeneous circumpolar distribution ... in the Southern Ocean. Krill have a close association with sea ice which provides access to a ... pathways of krill have until now been on regional scales and have not taken explicit account of sea ice ... potential roles of the ocean and sea ice in maintaining the observed circumpolar krill distribution. We show ...
Meeting Document : WG-EMM-07/P10 : Autor(es): S.E. Thorpe, E.J. Murphy and J.L. Watkins (United Kingdom)
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On possible influence of continuous krill fishing technology with the use of ‘air-bubbling suspension system’ on ecosystem elements
Abstract: It was shown that potential increase in krill fishery in the immediate future ... -krill- fishery interactions. In this case, apart from traditional commercial statistics (vessels ... of studying the krill fishing technology. It is just trawl design and fishing method that will ... , immature and adult krill and other small pelagic species. Obviously, ecological compatibility of krill ...
Meeting Document : WG-EMM-06/27 : Autor(es): S.M. Kasatkina and V.A. Sushin (Russia)
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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
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 for ... variability may be attributed to changes in the spatial distribution of krill relative to the survey area ...
Meeting Document : WG-EMM-03/6 : Autor(es): R.P. Hewitt, D.A. Demer and J.H. Emery (USA)
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Target strength estimation of Antarctic krill, Euphausia superba by cooperative experiments with commercial trawlers
Abstract: An estimate of target strength of Antarctic krill, Euphausia superba was obtained by a ... series of cooperative experiments between research vessel and commercial krill trawler. Estimated target ... strength per 1g wet weight of Antarctic krill was-66.ldB a t the frequency of 200kHz. Average size of krill ... Antarctic krill, Euphausia superba by cooperative experiments with commercial trawlers Approval: Approved ...
Meeting Document : SC-CAMLR-VIII/BG/30 : Autor(es): Delegation of Japan
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An ecological risk assessment of current conservation measures for krill fishing in East Antarctica (CCAMLR Divisions 58.4.1 and 58.4.2)
involved in any redevelopment of a commercial krill (Euphausia superba) fishery in CCAMLR Divisions 58.4.1 ... measures that are relevant to Divisions 58.4.1 and 58.4.2 sufficiently mitigate the risk of a krill fishery ... disproportionately concentrating catches in areas that are also important to krill predators. In particular, this ... , crabeater seals and Adélie penguins, in parallel with the currently agreed krill biomass estimates across ...
Meeting Document : WG-EMM-18/37 : Autor(es): N. Kelly, L. Emmerson, S. Kawaguchi, C. Southwell and D. Welsford
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Interannual and seasonal variability of salp by-catch from Japanese krill fishery around the South Shetland Islands
Abstract: Data on salp by-catch and green krill were analyzed based on Logbook data of Japanese ... krill trawlers. Inter-annual and seasonal variability of the timing, duration and strength of salp bloom ... were indicated. Salp by-catch and occurrence of green krill seemed to show reverse correlation ... , implying the competition for phytoplankton between krill and salps. Author(s): Naganobu, M., Ichii, T ...
Meeting Document : WG-EMM-97/37 : Autor(es): Naganobu, M., Ichii, T., Kawaguchi, S.
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Variability and predictability of Antarctic krill swarm structure
-identification algorithm and then filtering out all non-krill targets. The area, length, height, depth, packing ... describing both the environment and the internal-state of krill (namely maturity, body length, body condition ... significant explanatory power (P<0.05): surface fluorescence, PAR, krill maturity and krill body length ... , when surface fluorescence was low, and when the krill were small and immature. A strong pattern of diel ...
Meeting Document : WG-EMM-10/P10 : Autor(es): G.A.Tarling, T. Klevjer, S. Fielding, J. Watkins, A. Atkinson, E. Murphy, R. Korb, M. Whitehouse and R. Leaper
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Some characteristics of krill transport in the Scotia Sea based on the Russian survey data
Abstract: In this work the characteristics of krill transport across the SSMUs determined on the ... be accompanied with krill biomass transport across the boundaries of the SSMUs. Our estimates of ... krill flux out SSMU during fishing season appeared incomparable neither with the historical annual catch ... years. It is shown that total krill biomass of 3.392 mln.t. transported by water mass out three SSMUs is ...
Meeting Document : WG-EMM-05/41 : Autor(es): S.M. Kasatkina, V.N. Shnar and O.V. Berezhinsky (Russia)
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Krill distribution related to water structure and dynamics on the South Georgia shelf in January 2000 (AtlantNIRO-BAS Core Programme 1999/2000)
Abstract: Research on water structure and dynamics, krill biomass assessment, biology and ... each box. Krill were distributed rather evenly throughout both boxes, but no dense concentrations were ... apparent. In the western box krill density was nearly 0.2 glm3 and in the eastern box was 1.8- 4.7 glm3 ... • Juvenile krill of 30-36 mm length were observed in the shelf zone and larger specimens, including spawning ...
Meeting Document : WG-EMM-00/51 : Autor(es): V.A. Sushin (Russia), P.P. Chernyshkov (Russia), F.F. Litvinov (Russia), J.L. Watkins (United Kingdom) and A.S. Brierley (United Kingdom)