Résultats de la recherche
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A model at the level of the foraging trip for the indirect effects of krill (Euphausia superba) fisheries on krill predators
Abstract: 1. Although the development of fisheries for krill in the southern oceans has prompted ... considerable work on the indirect effects of fisheries on krill predators, to date all work has focused on ... the effects of a fishery on krill predators, using the Adelie penguin (Pygoscelis adeliae) as a model ... krill, ii) the effects of the fishery on the krill, iii) the description of penguin breeding and iv) the ...
Meeting Document : WG-EMM-96/20 : Auteur(s): Switzer, P.V., Mangel, M.
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Using the EPOC modelling framework to assess management procedures for Antarctic krill in Statistical Area 48: evaluating spatial differences in productivity of Antarctic krill
evaluate management procedures for the Antarctic krill fishery. The key issues to be resolved in the ... development of a harvest strategy are whether (i) spatial differences in the productivity of krill give rise ... to differential affects on predators in different locations, (ii) movement of krill between locations ... ameliorate any local fluctuations in krill abundance and (iii) fishery behaviour could be constrained by ...
Meeting Document : WG-EMM-06/38 Rev. 1 : Auteur(s): A.J. Constable (Australia)
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Indicators of krill flux at various spatial-temporal based on the data of multi-year research carried out in the Scotia Sea. Comments on krill fishery management
distribution of krill density, intensity of water flows (m³/s) and krill biomass (g/m³) transported by water ... understanding of krill biomass dynamic. It has been shown that the formation of transport of krill in the ... Scotia Sea requires both favorable dynamic conditions and krill influx from the Antarctic Pacific and the ... Weddell Sea. The data obtained demonstrate that the dynamics of krill biomass in a given area is more ...
Meeting Document : WG-EMM-2019/58 : Auteur(s): S. Kasatkina and V. Shnar
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A model at the level of the foraging trip for the indirect effects of krill (Euphausia superba) fisheries on krill predators
krill (Euphausia superba) predators, using the Adelie penguin (Pygoscelis adeliae) as a model organism ... . The model involves: (i) the description of the biomass and spatial distribution of krill; (ii) the ... effects of the fishery on the krill; (iii) the description of penguin breeding; and (iv) the indirect ... biomass of krill appropriate for the predators (and the fishery) fluctuates from one year to the next ...
Meeting Document : WG-EMM-98/48 : Auteur(s): M. Mangel and P.V. Switzer (USA)
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Winter habitat selection by Antarctic krill will increase krill-predator-fishery interactions during ice free years
Antarctic krill (Euphausia superba), a key forage species (Laws 1977; Smetacek and Nicol 2005) and a target ... et al. 2014; Atkinson et al. 2004) and is likely to increase krill-predator-fishery interactions ... estimates of krill biomass, habitat use, and association with top predators to examine these likely ... interactions. Krill were virtually absent in offshore waters of the Drake Passage during all three winters ...
Meeting Document : WG-EMM-15/05 : Auteur(s): C.S. Reiss, A. Cossio, C.D. Jones, A. Murray, G. Mitchell, J. Santora, K. Dietrich, E. Weiss, C. Gimpel, J. Walsh and G.M. Watters (USA)
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Do krill and salp compete? Contrary evidence from the krill fisheries
Abstract: Salp by-catch and krill discolouration ('green' krill) caused by active ... feeding on phytoplankton were analysed using logbook data from Japanese krill trawlers operating near the ... blooms and the presence of green krill were analysed. No relationship between salp density and the ... proportion of green krill in the catches was evident when both salps and krill were taken together. In the ...
Meeting Document : WS-AREA 48-98/4 Rev. 1 : Auteur(s): S. Kawaguchi (Japan), W.K. de la Mare (Australia), T. Ichii and M. Naganobu (Japan)
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On the need to determine the level of krill escapement mortality in the Antarctic krill fishery
Abstract: The krill escapement mortality and the methods to determine it are closely connected ... with the need to have systematic observer coverage in the Antarctic krill fishery. Experiments to ... estimate krill escapement mortality should be introduced on all krill fishing vessels that carry scientific ... observers onboard. To provide krill escapement mortality experiments it is proposed that data on speed of ...
Meeting Document : WG-EMM-10/10 : Auteur(s): L. Pshenichnov and G. Milinevsky (Ukraine)
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Proposal for a krill biomass survey for krill monitoring and management in CCAMLR Division 58.4.2-East
Abstract: Australia plans to conduct a krill biomass survey in Division 58.4.2 East during 23 ... January to 25 March 2021. The survey will estimate krill biomass with a view to update the precautionary ... catch limit for krill. A krill observatory mooring system will also be deployed during the survey to ... further monitor seasonal dynamics of krill in the seasonally ice covered area. The survey is also designed ...
Meeting Document : WG-EMM-2019/03 : Auteur(s): S. Kawaguchi, M. Cox, N. Kelly, L. Emmerson and D. Welsford
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Investigations of krill transport factors in the local areas in the Scotia Sea: variability of krill distribution in the fishing grounds under the transport impact
Georgia West), analysing variability of krill transport and distribution characteristics in the local ... each study areas were accompanied with pulsatory pattern of krill transport, i.e. krill transported ... value (in our case, CV biomass=57%) is important, but also the observed changes in krill aggregation ... patterns forming the transported biomass portions (in our case, CV swarms/mile 2 =63%). Therefore, krill ...
Meeting Document : WG-EMM-07/17 : Auteur(s): S.M. Kasatkina and V.N. Shnar (Russia)
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Features of spatial and temporally distribution patterns of krill flux in the Scotia Sea: some comments on the development of a krill fishery management in Area 48.
Abstract: The spatial variability of krill flux in the Scotia Sea calculated by using the ... distribution of krill density, water flow intensity (m 3 /s) and krill biomass (g/m3) transported by water flow ... to the Scotia Sea, were a subject of study. It is clearly illustrated that the geostrophic krill ... flux in the Scotia Sea requires both favorable dynamic conditions and availability of krill transported ...
Meeting Document : WG-EMM-18/21 : Auteur(s): S. Kasatkina, V. Shnar and A. Malyshko