Resultados de la búsqueda
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Orientation of Antarctic krill in an aquarium
Abstract: Acoustic methods appear to be the best way to estimate Antarctic krill abundance directly. Information on body orientation, however, is needed to obtain reliable krill acoustic target strength (TS) values, since TS varies with body orientation. Krill body orientation was measured in an
Meeting Document : WG-KRILL-93/24 : Autor(es): Y. Endo (Japan)
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A note on the chlorophyll measurement by satellite remote sensing in the Antarctic Ocean
Abstract: This paper describes the usefulness of satellite ocean color remote sensing in the Antarctic Ocean by making a comparison between CZCS chlorophyll images and ship-measured chlorophyll concentrations in the sea area off Enderby Land, Antarctica. In addition, some characteristics of the
Meeting Document : WG-KRILL-93/33 : Autor(es): T. Ogishima, M. Naganobu and S. Matsumura (Japan)
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Peak mortality of krill, fished with midwater trawls and feasible criteria of krill trawls ecological safety
Abstract: The mathematical model of a fishery object contact against a mesh, while escaping through a trawl chafer, is presented. Based on it t the equations are provided to calculate the object elimination probability caused by cath and mortality in fishery operations. The coefficient of trawl
Meeting Document : WG-KRILL-93/34 : Autor(es): Yu. V. Kadilnikov (Russia)
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Estimation of chlorophyll distributions obtained from satellite images (Nimbus-7/CZCS) in the Antarctic Ocean
Abstract: Previous studies have established that ocean color information from Nimbus-7/CZCS{Coastal Zone Color Scanner) could be related to distribution of phytoplankton pigment (Chlorophyll-a + pheopigments) concentrations. CZCS data from polar regions have been utilized only a limited number
Meeting Document : WG-KRILL-93/39 : Autor(es): N. Kimura, Y. Okada, S. Matsumura and Y. Sugimori (Japan)
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Krill length and age at maturity
calculate length and age at maturity for the Antarctic krill Euphausia superba. L50 values of 34.62 to 35.90 ... later at a length between L50 = 43.33 and 43.79 mm. Length at maturity, and length at first spawning are ... identical for krill. Comparisons with length at age data show that females mature in the third year of the ... age at maturity Approval: Approved ...
Meeting Document : WG-KRILL-93/40 : Autor(es): V. Siegel (Germany) and V. Loeb (USA)
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Antarctic krill, Euphausia superba Dana, demography studies in the seas of Sodruzhestvo and Cosmonauts (Indian Ocean sector of Antarctica)
Abstract: The materials on Euphausia superba biological state and size composition in the Indian Antarctic seas for the period from 1985 to 1990 are analyzed to form an opinion about its growth, life duration, as well as about the interannual variability in the above parameters. According to our
Meeting Document : WG-KRILL-93/45 : Autor(es): E.A. Pakhomov (Ukraine)
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Vacant
Title: Vacant Approval: Approved
Meeting Document : WG-KRILL-93/46
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Penguin foraging behavior in relation to the distribution of prey
migration pattern, being dispersed in the upper portion of the water column at night and more concentrated ... which has been found to be variable in different study locations at different times may in part be ...
Meeting Document : WG-KRILL-93/47 : Autor(es): D.A. Croll, R.P. Hewitt, D.A. Demer and J.K. Jansen (USA)
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Bias in acoustic biomass estimates of Euphausia superba Dana to diel vertical migration
Abstract: The diel vertical migration of Antarctic krill (Euphausia superba) can greatly bias the results of qualitative and quantitative hydroacoustic surveys which are conducted with a down-looking sonar and independent of the time of day. To demonstrate and quantify these negative biases on
Meeting Document : WG-KRILL-93/48 : Autor(es): D.A. Demer and R.P. Hewitt (USA)
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Acoustic estimates of krill biomass in the Elephant Island area: 1981-1993
Abstract: Acoustic estimates of krill biomass in the vicinity of Elephant Island for the years 1981-1993 (with the exception of 1982 and 1986) are presented. Estimates for 1981-1991 are based on previous reports adjusted for the recently proposed definition of krill target strength. Biomass
Meeting Document : WG-KRILL-93/49 : Autor(es): D.A. Demer and R.P. Hewitt (USA)