Résultats de la recherche
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Analysis of the krill fishery in Subarea 48.1 considering trawl fishing method used (2010–2016)
Abstract: An analysis of spatio-temporal variability of CPUE indices in the krill fishery in ... using the standardized CPUE indices as krill biomass density indices for monitoring the variability of ... krill biomass in SSMU during the fishing season is discussed. Variability of monthly average ... standardized CPUE estimates in the Bransfield strait shows that despite intensive fishery the density of krill ...
Meeting Document : WG-EMM-17/27 : Auteur(s): S. Kasatkina S. and L. Boronina
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SELECTIVITY OF CONVENTIONAL AND CONTINUOUS TECHNIQUES OF KRILL FISHERY
Abstract: Combination of conventional and continuous techniques during krill fishery at the ... Antarctic krill (Euphausia superba) caught by these two techniques. Results of comparison are discussed in ... relation to the selectivity of fishing gears and the space-time variability of krill. Differences between ... size composition of krill caught by conventional and continuous techniques of fishery which could be ...
Meeting Document : WG-EMM-11/14 : Auteur(s): D. Sologub (Russia)
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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 ... thermal conditions, krill and baleen whale distributions. The oceanography of the surface layer was ... 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 : Auteur(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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Near-shore acoustic surveys for Antarctic krill at South Georgia, January 2004
the surveys was to determine krill density near shore, in regions that have not traditionally been ... speeds of up to 7 knots. Echo intensity data were scaled to krill density using a target strength ... determined from the length distribution of krill sampled from fur seal scats at Bird Island (mean krill ... length 53.13 mm, TS =-38.43 dB kg-1). Mean krill densities were 7.1 g m-2 off the Barff Peninsula and 5.7 ...
Meeting Document : WG-EMM-04/35 : Auteur(s): A.S. Brierley, P.N. Trathan, J. Poncet and A. Morton (United Kingdom)
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Are penguins and seals in competition for Antarctic krill at South Georgia?
, respectively, the main mammal and bird consumers of Antarctic krill (Euphausia superba). In recent years the ... krill of similar size ranges, dive to similar depths and are restricted in their foraging range at least ... 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 : Auteur(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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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 : Auteur(s): D.A. Demer and S. G. Conti (USA)
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An acoustic estimation of krill densities to the north of South Georgia in January 1994
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 ... provide further evidence of an extreme krill paucity around South Georgia in the 1993/4 season. Author(s ... ): Watkins, J.L., Brierley, A.S. Title: An acoustic estimation of krill densities to the north of South ...
Meeting Document : WG-EMM-95/74 : Auteur(s): Watkins, J.L., Brierley, A.S.
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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 : Auteur(s): 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
, accordingly, form the fishing process influence on ecosystem components, such as juvenile fish, larvae ... relationships to fish, birds and mammals. It was discussed the potential major sources and scenarios of ... (seals, fish, for instance), though not fished by trawl, can be exposed to ecological pressing at a ... Abstract: It was shown that potential increase in krill fishery in the immediate future ...
Meeting Document : WG-EMM-06/27 : Auteur(s): 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 : Auteur(s): R.P. Hewitt, D.A. Demer and J.H. Emery (USA)