Résultats de la recherche
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Patterns and processes in the distribution and dynamics of Antarctic krill
distribution and dynamics of Antarctic krill population at various spatial and temporal scales. We suggest that ... models of increasing complexity be developed iteratively for variability and patchiness of krill ... critical processes to be added. An analysis of spatial distribution of krill in the Bransfield Strait area ... reveals that purely physical models of turbulent redistribution are not sufficient to explain krill ...
Meeting Document : SC-CAMLR-VII/BG/20 : Auteur(s): United States of America
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Some aspects of spatial–temporal variability of hydrodynamic water circulation and krill distribution in the Scotia Sea
Abstract: The authors considered the inter-annual variability of krill transport factors in the ... analysis were the geostrophic water masses circulation and krill transport factors, including variability ... of water masses (kg / m 3) and krill biomass (g / m3) transporting across the survey area. Obtained ... krill in subareas/SSMUs in the Scotia Sea is in a greater degree a reflection of the dynamics of krill ...
Meeting Document : WG-EMM-16/39 : Auteur(s): S.M. Kasatkina and V.N. Shnar
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Krill biomass and distribution variability in Subarea 48.3 in June 1991
Abstract: Temporal and spatial variability of krill distribution features was investigated at the ... micropolygon of 8 x 6 miles, where eight consecutive hydroacoustic stations were carried out. Krill ... number varied within the broad range from 1918 to 7000 and further to 1554 units. Krill biomass at ... polygon varied spasmodically within the range from 1091 to 6085 t. Krill distribution variability revealed ...
Meeting Document : WG-CEMP-92/35 : Auteur(s): S.M. Kasatkina, E.I. Timokhin, P.P. Fedulov and K.E. Shulgovskiy (Russian Federation)
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NET-BASED VERIFICATION OF ACOUSTIC TECHNIQUES USED TO IDENTIFY ANTARCTIC KRILL
that were collected during two cruises to the South Georgia region in 1996. For each krill aggregation ... identification algorithms for krill: (i) ‘3 freq model’- using the SDWBA to set the acceptance windows for both ... model derived target id window only identified krill in 6 of the 16 nets correctly. The ‘2 freq 2-16 ... ’ algorithm attributed more than 90 % of the total backscatter to krill in all but 1 aggregation with the ‘2 ...
Meeting Document : WG-EMM-08/54 : Auteur(s): J. Watkins and S. Fielding (United Kingdom)
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Effects of sea-ice extent and krill or salp dominance on the Antarctic food web
Abstract: Krill (Euphausia superba) provide a direct link between primary producers and higher ... not a major dietary item for Antarctic vertebrate predators, their blooms can affect adult krill ... reproduction and survival of krill larvae. Here we provide data from 1995 and 1996 that support hypothesized ... relationships between krill, salps and region-wide sea-ice conditions. We have assessed salp consumption as a ...
Meeting Document : WG-EMM-97/73 : Auteur(s): Hewitt, R., Trivelpiece, S., Fraser, W., Holm-Hansen, O., Siegel, V., Trivelpiece, W., Loeb, V.
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KRILL FISHERY REPORT: 2011 UPDATE
and Poland have fished for krill in Area 48. The total catch reported to May 2011 was 110949 t, most ... has been taken by two vessels using the continuous fishing system. The forecast total catch of krill ... for the season falls in the range 153000-214000 t. In 2009/10, 10 vessels fished for krill in Area 48 ... first time, the catches of krill approached the apportioned limit for Subarea 48.1 (25% of the trigger ...
Meeting Document : WG-EMM-11/05 : Auteur(s): Secretariat
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Variation in the distribution of Antarctic krill Euphausia superba around South Georgia
South Georgia. Here we summarize the length-frequency distributions of krill caught on each of these ... cruises and look particularly at differences between krill taken from the eastern and western ends of the ... types with relatively simple biological characteristics: cluster 1 were medium-sized year 2+ krill (mean ... size 39.7 mm); cluster 2 were a mixture of year classes (mean size 37.7 mm); cluster 3 were large krill ...
Meeting Document : WG-EMM-97/47 : Auteur(s): Daly, H.I., Murray, A.W.A., Watkins, J.L.
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Analysis of operating conditions of the fishing vessel in relation to the distribution, biological state and behaviour of Antarctic krill (a contribution to the development of a simulation model)
Abstract: The paper considers peculiarities of krill fishery conducted by a krill fishering and ... processing vessel producting krill meat. The vessel operated in the Commonwealth Sea, the Cosmonaut Sea and ... utilisation of raw krill for processing. The catsh size was regulated by varying haul duration on yhe basis on ... cause was tthe size composition of krill in the catches. Preference was given to larger krill. The ...
Meeting Document : SC-CAMLR-VIII/BG/23 : Auteur(s): Delegation of USSR
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Winter distribution and condition of Antarctic krill in relation to sea-ice and water column production in the South Shetland Islands during Austral Winter 2013
Abstract: Acoustic and net sampling of Antarctic Krill and other euphausiids was conducted at 88 ... . Abundance and demographic patterns revealed that Antarctic krill were concentrated in the southern ... Bransfield Strait, and that these krill were approximately 33mm in length, about 10mm larger than found ... during the 2012 winter survey (Reiss and Jones 2013; WG-EMM 13/40) but similar in size to krill found in ...
Meeting Document : WG-EMM-14/13 : Auteur(s): C.S. Reiss, J. Walsh, K. Dietrich and J.A. Santora (USA)
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A comparison of acoustic targets at South Georgia and the South Orkney Islands during a season of profound krill scarcity
acoustic targets into three biological categories: Antarctic krill; nekton (larger than krill); and ... zooplankton (smaller than krill). To counter the absence of krill length-frequency data from Coronation Island ... conjunction with appropriate 120 kHz data to calculate krill density estimates for both survey areas. Krill ... density; for example one echo-integration interval contained 104 times the mean krill density. An ...
Meeting Document : WG-EMM-95/75 : Auteur(s): Watkins, J.L., Brierley, A.S.