Résultats de la recherche
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Proposal for an acoustic krill biomass survey in CCAMLR Division 58.4.2
Abstract: This document outlines plans by Australia to conduct an acoustic biomass survey for ... data to that used on the CCAMLR2000 survey. The survey will be conducted from a single ship and will ... krill in CCAMLR Division 58.4.2 (the South West Indian Ocean Sector) in January-March 2006. The survey ... : Proposal for an acoustic krill biomass survey in CCAMLR Division 58.4.2 Approval: Approved ...
Meeting Document : WG-EMM-04/37 : Auteur(s): S. Nicol, S. Kawaguchi, T. Jarvis and T. Pauly (Australia)
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Krill physiology and impact of temperature variations: a comparative approach
and should soon focus on data from at least 25 different euphausiid species harvested in the Antarctic ... Status: Content Approved Document Release Consent: No Delegation responsibility for releasing documents ... the physiology of Antarctic krill, with a focus on the response to environmental temperature ... -Taiwanese and French-Chilean collaboration. Author(s): J.-Y. Toullec and C.-Y. Lee Title: Krill physiology ...
Meeting Document : WG-EMM-2019/70 : Auteur(s): J.-Y. Toullec and C.-Y. Lee
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OCEANIC CIRCUMPOLAR HABITATS OF ANTARCTIC KRILL
wider, circumpolar perspective we compiled all available net-based density data on postlarvae: 8137 ... Approval: Approved Secretariat Workflow Status: Content Approved Document Release Consent: No Delegation ... view that krill require high food concentrations, with a distribution often linked to shelves. For a ... , with 70% of the total stock concentrated between 0o and 90oW. Within this Atlantic sector, krill are ...
Meeting Document : WG-EMM-08/P04 - Abstract : Auteur(s): A. Atkinson, V. Siegel, E. A. Pakhomov, P. Rothery, V. Loeb, R.M. Ross, L.B. Quetin, K. Schmidt, P. Fretwell, E.J. Murphy, G.A. Tarling and A.H. Fleming
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Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands
surveyed to investigate mechanisms for the formation of krill concentrations and to estimate acoustic ... biomass of krill in the 1990/91 austral summer. Main krill concentrations occurred in the shelf waters ... north of the islands, as usual. Tracks of drifting buoys (with curtain drogues at 30 m depth where krill ... ground for krill.) High concentrations of chlorophyll a were also measured in the shelf waters, showing a ...
Meeting Document : WG-KRILL-91/22 : Auteur(s): Delegation of Japan
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Possible options for the future management of the Antarctic krill fishery in Subarea 48.2
identifies some of the main data requirements, including oceanographic modelling, predator monitoring, and ... ecological knowledge base, but identify that this will take time. We conclude that if the krill fishery in ... fisheries acoustics. We propose that the experimental framework should be evaluated periodically in order to ... . Godø and S. Hill Title: Possible options for the future management of the Antarctic krill fishery in ...
Meeting Document : WG-EMM-16/18 : Auteur(s): P. Trathan, O.R. Godø and S. Hill
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Factors influencing Antarctic krill distribution in the South Shetlands
Abstract: The influences of biological and physical factors in the environment upon krill ... austral summer. Krill showed a distinct offshore-inshore heterogeneities in abundance and maturity stage ... zone (37.3 g/m2), and the highest along the shelf break (135.1 g/m2) in the inshore zone; krill were ... factors were considered to be responsible for this characteristic distribution of krill. Diatoms were the ...
Meeting Document : WG-KRILL-93/38 : Auteur(s): T. Ichii, H. Ishii and M. Naganobu (Japan)
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Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
Abstract: Shipboard tracking study for krill-eating predators (penguins and female fur seals) at ... . Penguin foraging areas were formed in inshore region, where krill frequently occurred but higher density ... areas of krill (≥250g/m2) were rather limited. In contrast, fur sea! foraging areas were formed in ... offshore region, where krill occurred only occasionally but they tended to form extensive aggregations (ca ...
Meeting Document : WG-KRILL-92/27 : Auteur(s): T. Ichii, H. Ishii (Japan), J.L. Bengtson, P. Boveng, J.K. Jansen (USA) and M. Naganobu (Japan)
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Possible effects of different levels of fishing on krill on predators - some initial modelling attempts
of the parameters of predator survival rates as functions of krill abundance, by considering a krill ... breeding success patterns for certain krill predator species. A "one-way" interaction model is ... developed, in which krill abundance fluctuations impact the predator population, but not vice versa ... . Computations based on this model indicate that variability in the annual recruitment of krill results in ...
Meeting Document : WG-KRILL-93/43 : Auteur(s): D.S. Butterworth and R.B. Thomson (South Africa)
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Krill distribution and biomass variability within Subarea 48.3 in June 1991
Abstract: Temporal and spatial variability of krill distribution characteristics was investigated ... in an 8 x 6 mile micropolygon, where eight consecutive hydroacoustic surveys were carried out. Krill ... 1 554 units. Krill biomass in the polygon varied spasmodically within the range from 1 091 to 6 085 ... tonnes. Krill distribution variability revealed in the polygon suggests an irregular import and export of ...
Meeting Document : WG-KRILL-93/35 : Auteur(s): S.M. Kasatkina, E.N. Tymokhin, P.P. Fedulov and K.E. Shulgovskiy (Russia)
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Target strengths of krill at 136 and 20 kHz
Abstract: Estimation of krill target strength was made by ensonification of encaged live krill ... and using trawling-acoustic method. Ensonification of encaged live krill. For aggregations with mean ... lengths in the range (45,50) mm the mean single-krill target strengths are in the range (-68,-69) dB at ... 136 kHz. For aggregations with mean lengths in the range (43,47)mm the mean single-krill target ...
Meeting Document : WG-KRILL-91/29 : Auteur(s): S.M. Kasatkina (USSR)