Search results
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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 ... was 47.48mm and 0.873g. Author(s): Delegation of Japan Title: Target strength estimation of Antarctic krill ...
Meeting Document : SC-CAMLR-VIII/BG/30 : Author(s): Delegation of Japan
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Orientation of Antarctic krill in an aquarium
Abstract: Acoustic methods appear to be the best way to estimate Antarctic krill abundance ... directly. Information on body orientation, however, is needed to obtain reliable krill acoustic target ... strength (TS) values, since TS varies with body orientation. Krill body orientation was measured ... (s): Y. Endo (Japan) Title: Orientation of Antarctic krill in an aquarium Approval: Approved ...
Meeting Document : WG-KRILL-93/24 : Author(s): Y. Endo (Japan)
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An acoustic estimation of krill densities to the north of South Georgia in January 1994
strength between the two frequencies (δMVBS = MVBS 120 kHz- MVBS 38 kHz) was used to discriminate krill ... from other acoustic targets. A generic target strength to weight relationship was used to derive krill ... densities from 120 kHz signals attributed krill. At less than 1 g m-2, mean weighted krill densities in both ... evidence of an extreme krill paucity around South Georgia in the 1993/4 season. Author(s): Watkins, J.L ...
Meeting Document : WG-EMM-95/74 : Author(s): Watkins, J.L., Brierley, A.S.
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Interaction between oceanography, krill and baleen whales in the Ross Sea and adjacent waters, Antarctica in 2004/05
conditions, and the distribution of krill as prey and baleen whales as predators in the Ross Sea and its ... the thermal conditions, krill and baleen whale distributions. The oceanography of the surface layer ... with distribution patterns of each species. Antarctic krill (Euphausia superb) mainly distributed in the Antarctic ... -200 =-1°C). Ice krill (Euphausia crystallorophias) clearly distributed in SW but not ASW. Humpback ...
Meeting Document : WG-EMM-07/07 : Author(s): M. Naganobu, S. Nishiwaki, H. Yasuma, R. Matsukura, Y. Takao, K. Taki, T. Hayashi, Y. Watanabe, T. Yabuki, Y. Yoda, Y. Noiri, M. Kuga, K. Yoshikawa, N. Kokubun, H. Murase, K. Matsuoka and K. Ito (Japan)
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Are penguins and seals in competition for Antarctic krill at South Georgia?
they are, respectively, the main mammal and bird consumers of Antarctic krill (Euphausia superba). In recent years ... on krill of similar size ranges, dive to similar depths and are restricted in their foraging range at least ... but the concentrations of foraging activity were significantly segregated spatially. The size of krill taken by both ... species was very similar, but over the last 12 years the prevalence of krill in their diets has diverged ...
Meeting Document : WG-EMM-02/22 : Author(s): K.E. Barlow, I.L. Boyd, J.P. Croxall, K. Reid, U.J. Staniland and A.S. Brierley (United Kingdom)
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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)
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How many krill should we measure?
Abstract: We have no standard as to how many krill we should measure to obtain reliable estimates ... on its body length distribution. Krill samples collected from layers in the northern waters of Livingston ... on cumulative frequency distributution. Author(s): Y. Endo (Japan) Title: How many krill should we measure ... We have no standard as to how many krill we should measure to obtain reliable estimates on its body ...
Meeting Document : WG-KRILL-90/26 : Author(s): Y. Endo (Japan)
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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 ... with an 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-tank ...
Meeting Document : WG-EMM-02/49 : Author(s): D.A. Demer and S. G. Conti (USA)
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On the examining of krill flux
Abstract: In connection with future calculation of volume of krill immigration/emigration (flux ... ) in the choosen polygones, the proves of active long-distance migrations of krill are considered. These proves ... , is the valuation of krill retention time. To make it more correct and natural it is necessary to take into account ... the biological characteristics of krill, especially for the regions outside the shelf and slope areas ...
Meeting Document : WG-EMM-95/19 : Author(s): Makarov, R.
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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 ... will be accompanied with krill biomass transport across the boundaries of the SSMUs. Our estimates of krill flux out ... . It is shown that total krill biomass of 3.392 mln.t. transported by water mass out three SSMUs is comparable ... to the total precautionary yield value in the Scotia Sea comprising 3.17 mln.t. It is concluded that krill ...
Meeting Document : WG-EMM-05/41 : Author(s): S.M. Kasatkina, V.N. Shnar and O.V. Berezhinsky (Russia)