Résultats de la recherche
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Changes observed in krill length frequency distribution during repeated sampling on the South Georgia shelf in 2000 January–February
collaborative venture AtlantNIRO-BAS on 5-8 January and 10-13 January and then during fish bottom trawl survey ... Abstract: Krill sampling were carried out Northwest and Northeast South Georgia, first during ... difference in krill inhabiting Northwest and Northeast South Georgian waters. According to the data available ... the difference do not disappear in time, instead certain increase of krill length was observed in both ...
Meeting Document : WG-EMM-01/40 : Auteur(s): V.A. Sushin and F.F. Litvinov (Russia)
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Assessment of fishable krill biomass on the basis of the acoustic surveys results using geostatistical methods
krill density based on the acoustic survey data is demonstrated. The results obtained indicate ... usefulness of these methods in studying the structure of krill density field for biomass assessment in ... compliance with different thresholds of their fishery importance. The structure of krill density field in ... Subarea 48.3 based on the surveys 2000 and 2002 indicates that krill fishable biomass is concentrated in ...
Meeting Document : WG-SAM-10/07 Rev. 1 : Auteur(s): S.M. Kasatkina and P.S. Gasyukov (Russia)
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Chinstrap penguins alter foraging and diving behaviour in response to krill size
these patterns, we suggest that when krill were small, penguins foraged more on myctophid fish. The ... fish, mean nighttime dive depths, and the proportion of foraging trips occurring overnight. Based on ... that penguins made this switch to fish with a cost: more time was spent at sea foraging. Author(s ... changes in prey availability. Chinstrap penguins are dependent predators of Antarctic krill in the Scotia ...
Meeting Document : WG-EMM-07/11 : Auteur(s): A.K. Miller and W.Z. Trivelpiece (USA)
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The US commercial krill fishery in Area 48: development, fishing patterns, and decision making
for krill (Euphausia superba) in Area 48 in July, 2000. This fishery has continued and expanded each ... decision making processes involved in harvesting krill by the U.S. fishery. Because the Captain of the Top ... Ocean had no prior experience fishing for krill, anecdotal and historical information served as the ... , and the decision making processes involved in prosecuting the U.S. commercial fishery for krill by ...
Meeting Document : WG-EMM-02/18 : Auteur(s): C.D. Jones and M. Hull (USA)
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Net-based verification of acoustic techniques used to identify Antarctic krill
Distorted Wave Approximation (SDWBA) krill target strength model, are assessed. Three frequency acoustic ... data and concurrent net information, from 16 net hauls through krill aggregations, were collected ... . Using the SDWBA model, dB difference identification ranges based on the length-frequencies of krill in ... identified only 6 of the 16 krill aggregations sampled the nets. contrast the '2 freq model' and ...
Meeting Document : SG-ASAM-09/04 : Auteur(s): J. Watkins and S. Fielding (United Kingdom)
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Preliminary results on the composition and abundance of the krill stock in the southern Bellingshausen Sea (Antarctic, CCAMLR Subarea 88.3)
Abstract: Krill sampling was carried out onboard RV ‘Polarstem’ from January 25 to March 11, 1994 ... south of 66°S, between 68°W and 120°W. Krill Euphausia superba abundance and biomass was in the lower ... spatial separation for size groups was observed for krill, with small size groups being more abundant in ... . The overall krill length frequency distribution was similar to the composition reported from the South ...
Meeting Document : WG-EMM-95/18 : Auteur(s): Siegel, V.
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Broadbandwidth sound scattering and absorption from krill (Meganyctiphanes norvegica), Mysids (Praunus flexuousus and Neomysis integer) and shrimp (Crangon crangon)
Abstract: Sound scattering and absorption measurements were made of Northern krill ... measurements made of Antarctic krill (Euphausia superba; Demer and Conti, 2003a). The measurements of total ... krill, indicating its validity for other euphausiids species with similar size and shape. However, the ... derived with the generic krill shape and scaled to animal length (L). This implies that crustacean target ...
Meeting Document : WG-EMM-04/40 : Auteur(s): S.G. Conti, D.A. Demer (USA) and A.S. Brierley (United Kingdom)
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Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 on the basis of the Soviet mesoscale surveys with Isaacs Kidd midwater trawl
area of krill between Antarctic Peninsula and South Georgia Island are considered. Surveys including ... standard method by Isaacs Kidd Midwater Trawl in the layer 0-100 m. Krill biomass distribution (g/1000 m3 ... investigated. The results of surveys confirm modern understanding of general pattern of krill distribution and ... ). The most spatial-temporal stability of the krill distribution field with more higher biomass of ...
Meeting Document : WG-EMM-98/32 : Auteur(s): V.A. Sushin and K.E. Shulgovsky (Russia)
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Assessment of krill biomass in fishing grounds using the data on fishing intensity and hydroacoustic method
fishing intensity based on actual fishing effort and estimating the initial krill biomass prior to ... beginning of the fishery. Application of the statistical method for assessment of the initial krill biomass ... krill biomass estimate produced by the echo integrating apparatus used in the layer fished with the ... trawl. As applied to the estimate of trawl catchability in the krill fishery, this method is reliable ...
Meeting Document : SC-CAMLR-VIII/BG/10 : Auteur(s): USSR
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Impacts of rising sea temperature on krill increase risks for predators in the Scotia Sea
, penguins, seals, and fish) in the Scotia Sea. We also investigated the potential to mitigate depletion risk ... Antarctic krill, Euphausia superba, might affect populations of krill and dependent predators (whales ... for predators by curtailing krill fishing at different points in the 21st century. The projected ... effects of ocean warming on krill biomass were strongest in the northern Scotia Sea, with a ≥ 40% decline ...
Meeting Document : WG-EMM-18/P02 : Auteur(s): E.S. Klein, S.L. Hill, J.T. Hinke, T. Phillips and G.M. Watters