Resultados de la búsqueda
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Chinstrap penguins alter foraging and diving behaviour in response to krill size
changes in prey availability. Chinstrap penguins are dependent predators of Antarctic krill in the Scotia ... Sea region. Both the sizes of krill found in penguin diets and acoustic estimates of krill biomass ... recorders (TDRs) over five seasons: 2002-06. When krill were smaller, chinstrap penguins often exhibited a ... daytime. The average annual size of krill was negatively correlated to the number of penguins foraging on ...
Meeting Document : WG-EMM-07/11 : Autor(es): A.K. Miller and W.Z. Trivelpiece (USA)
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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 : Autor(es): Siegel, V.
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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 : Autor(es): C.D. Jones and M. Hull (USA)
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Direct ageing of Antarctic krill (Euphausia superba) – potential utility of eyestalk sections for age determination
Abstract: We outline a method for the direct determination of age in Antarctic krill (Euphausia ... proof of concept study using several known age krill grown under controlled conditions at the Australian ... performed. First, longitudinal sections of the eyestalk from known age krill (2+ and 3+ years old) were ... . Second, six krill were aged (blind to the reader) from samples collected during summer and winter (2013 ...
Meeting Document : WG-EMM-15/45 : Autor(es): C. Reiss (USA), R. Kilada (Canada) and S. Kawaguchi (Australia)
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Impacts of rising sea temperature on krill increase risks for predators in the Scotia Sea
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 ... in the mass of individual krill. Projections also suggest a 25% chance that krill biomass will fall ...
Meeting Document : WG-EMM-18/P02 : Autor(es): E.S. Klein, S.L. Hill, J.T. Hinke, T. Phillips and G.M. Watters
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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 : Autor(es): V.A. Sushin and K.E. Shulgovsky (Russia)
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A conceptual model of Japanese krill fishery
Abstract: The behaviour patterns of Japanese krill fishery vessels in Area 48 were analysed using ... , krill density, krill, size, ice condition, transshipment, and salp-by catch accounted for 95.6% of the ... changes. Although low krill density was the primary reason for changing fishing grounds, other seasonal ... succession of the Japanese krill fishing operation revealed that they tend to utilize fishing grounds close ...
Meeting Document : WG-EMM-05/30 : Autor(es): S. Kawaguchi, S. Nicol (Australia), K. Taki and M. Naganobu (Japan)
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A conceptual model of the krill fishery
Abstract: The behaviour patterns of Japanese krill fishery vessels in Area 48 were analysed using ... , krill density, krill, size, ice condition, transshipment, and salp-by catch accounted for 95.6% of the ... changes. Although low krill density was the primary reason for changing fishing grounds, other seasonal ... succession of the Japanese krill fishing operation revealed that they tend to utilize fishing grounds close ...
Meeting Document : WG-EMM-04/51 : Autor(es): S. Kawaguchi, S. Nicol (Australia), K. Taki and M. Naganobu (Japan)
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Measurements of sound-speed and density contrasts of Antarctic krill (Euphausia superba) on board RV Kaiyo Maru
Abstract: In order to calculate the target strength of Antarctic krill (Euphausia superba) using ... of krill were measured during the Antarctic surveys conducted by the Japanese RV Kaiyo Maru in 1999 ... /2000 and 2004/2005. Samples of krill were caught by a RMT(1+8). Mass-density of krill was measured by ... . The corresponding sound-speed contrast of krill with mean total lengths of 44.2mm was 1.011 in the ...
Meeting Document : WG-EMM-08/56 Rev. 1 : Autor(es): Y. Takao, H. Yasuma, R. Matsukura, K. Amakasu and M. Naganobu (Japan)
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Krill biomass estimates for South Georgia, December and January 1996/97
Georgia during December/January 1996/97. Netting suggested that the mean lengths of krill within the ... box-specific krill target strength (TS) values of-38.89 and-38.59 dB kg-1. Acoustic signals believed ... to be attributable to krill were identified on the basis of the difference between mean volume ... backscattering strength at 120 and 38kHz (mvbsl20 kHz- mvbs38kHz between 2 and 12 dB indicative of krill). Mean ...
Meeting Document : WG-EMM-97/48 : Autor(es): Goss, C., Watkins, J.L., Brierley, A.S.