Résultats de la recherche
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Evaluation of krill transport factor results in Subarea 48.2 in summer period of 1996
Abstract: The methods and preliminary data on evaluation of krill transfer factors results in ... Weddell Sea waters. The experiment was carried out in two stages: evaluation of krill transport through ... the polygon boundaries; hydroacoustic evaluation of krill biomass and distribution in the polygon and ... researches of krill transport peculiarities through the polygon depending on water dinamics. Krill transport ...
Meeting Document : WG-EMM-96/37 : Auteur(s): Sushin, V.A., Kasatkina, S.M., Shnar, V.N., Abramov, A.M., Polischuk, M.I.
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Predicting changes in the Antarctic krill Euphausia superba population at South Georgia
of Antarctic krill Euphausia superba and subsequent effects on dependent predators. However, the ... nature and consequences of changes in krill population dynamics that accompany l1uctuations in its ... abundance are essentially unknown. A conceptual model, developed froll1 quantitative measures of krill ... the abundance and population structure of krill in 1998 and the consequences for predators. Consistent ...
Meeting Document : WG-EMM-99/37 : Auteur(s): K. Reid, K.E. Barlow, J.P. Croxall and R.I. Taylor (UnitedKingdom)
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Krill biomass and distribution in Subarea 48.2 during summer 1996
Abstract: The results of hydroacoustic survey of krill biomass assessment in Subarea 48.2 ... presented. Taking in account close relation of krill and oceanographic structure of waters and currents ... , hydrorological conditions during surveys are also discussed in the paper. Average weighed density of krill in the ... study area amounted to 17 g/sq.m, obtained on the basis of diurnal surveys, and average weighted krill ...
Meeting Document : WG-EMM-97/49 : Auteur(s): Kasatkina, S.M., Abramov, A.M., Polischuk, M.I., Sushin, V.A.
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On influence of acoustic survey methodology improvement on krill biomass estimation. (A comparison of results of acoustic surveys based on single-frequency and double-frequency algorithms)
krill surveys have taken place for the recent twenty years. It has been attempted to determine the ... influence of such improvements on krill biomass estimation. The letter seems to become useful in comparative ... analysis of krill biomass data from the results of different acoustic surveys. There have been presented ... the results of krill biomass comparative estimation by single-frequency and double-frequency ...
Meeting Document : WG-EMM-01/41 : Auteur(s): S.M. Kasatkina and A.P. Malyshko (Russia)
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Conservation of Antarctic pack-ice seals with increasing krill fishing and environmental change
Abstract: The management of Antarctic krill and conservation of its predators requires ... . For Antarctic pack-ice seals, a main group of krill predators, we report the spatial density and krill ... consider long-term changes in suitable pack-ice habitat, increased fishing pressure and potential krill ... and in the entire area, over 3 million crabeater seals can consume over 12 million tonnes of krill ...
Meeting Document : WS-MPA-11/24 : Auteur(s): J. Forcada, P.N. Trathan (UK), P.L. Boveng (USA), I.L. Boyd (UK), D.P. Costa (USA), M. Fedak (UK), T.L. Rogers and C.J. Southwell (Australia)
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Characteristics of krill aggregations in 48.4 subdivision during January–February 2000
Abstract: It has been showed that krill spatial distribution in 48.4 Subarea was characterized by ... have been revealed differences between spatial distribution patterns of krill aggregations of different ... characteristics of some 2400 krill swarms detected and sized acoustically in the study area have been described ... been made an analysis of krill biomass horizontal and vertical distributions in the study area in ...
Meeting Document : WG-EMM-01/42 : Auteur(s): S.M. Kasatkina, A.P. Malyshko, V.N.Shnar and O.A. Berezhinskiy (Russia)
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Feeding behaviour of Antarctic krill on salps
Abstract: Feeding behavior of Antarctic krill (Euphausia superba) on salps was observed through ... 1 salp/krill/day. Among 4 items of ethanol extracts; salps, phytoplankton, krill, and polychaets ... , krill preferred salps best. This evidence implies that the substances extracted from salps were most ... attractive to krill. The result of our experiment might indicate a tight ecological relationship between ...
Meeting Document : WG-EMM-95/57 : Auteur(s): Takahashi, Y., Kawaguchi, S.
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On the possibility of practical utilisation of krill target strength TS in situ obtained on the basis of EK-500 measurements
Abstract: Comparative analysis of krill length distribution in the echosurvey area, obtained with ... trawl and acoustic methods is presented. Besides, the acoustic estimate of krill length composition was ... situ at the frequency of 120 kHz as measured with echosounder EK-500 (split-beam) principle). Krill was ... caught with the commercial trawl RT 741448. It was shown that differences between krill length ...
Meeting Document : WG-EMM-98/19 : Auteur(s): S.M. Kasatkina (Russia)
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Size and stage composition of age class 0 Antarctic krill (Euphausia superba) in the ice-water interface layer during winter/early spring
Abstract: The condition and survival of Antarctic krill (Euphausia superba) strongly depends on ... sea ice during winter. How krill utilize sea ice depends on several factors such as region and ... developmental stage. A comprehensive understanding of sea ice habitat use by krill, however, remains largely ... unknown. The aim of this study was to improve the understanding of the krill's interaction with the ...
Meeting Document : WG-EMM-16/P16 : Auteur(s): F. Schaafsma, C. David, E. Pakhomov, B. Hunt, B. Lange, H. Flores, J.A. van Franeker
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Characteristics of interannual variation in aggregation and diurnal vertical migration of Antarctic krill at South Georgia during winter
index and diurnal vertical distribution for Antarctic krill in krill fishing grounds (hotspots) at South ... Georgia during winter based on Japanese krill fishery data during the period 1990-2012. High density and ... follows: Median CPUEs did not show particularly low values in winter even when krill abundance and ... predator performance were poor in the previous summer. Krill recruitment index at South Georgia suggested ...
Meeting Document : WG-EMM-18/34 : Auteur(s): T. Ichii, Y. Mori, P.N. Trathan, K. Mahapatra, M. Okazaki, T. Hayashi and T. Okuda