Résultats de la recherche
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Histopathology of Antarctic krill, Euphausia superba, bearing black spots
Abstract: Small black spots have been noticed on the cephalothorax of Antarctic krill, Euphausia ... superba, since January, 2001. To study the nature of the black spots, the krill were sampled in the winter ... bacteria or amorphous material. In the 2007 samples, 42% of the krill had melanized nodules. Most of the ... nodules had an opening on the body surface of the krill. A single melanized nodule often contained more ...
Meeting Document : WG-EMM-08/P09 : Auteur(s): S. Miwa, T. Kamaishi, T. Matsuyama, T. Hayashi and M. Naganobu
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Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
krill yields according to decision rules that relate spawning stock status to the median unexploited ... spawning biomass, SB0. The first model has been developed specifically for krill, the krill yield model ... ). The krill yield model uses a biased estimate of SB0 with a method for correcting this bias in the ... correction. This paper examines the implications for estimates of krill yield from using the biased estimate ...
Meeting Document : WG-EMM-97/45 : Auteur(s): de la Mare, W.K., Constable, A.J.
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Net sample validation of acoustic techniques used to identify and size Antarctic krill
Abstract: Acoustic surveys to estimate krill biomass require that sound backscattered by krill be ... collected with an RMT8. Around 80 % of the targets thought to be krill on the basis of their appearance on ... echo-charts were also identified as krill on the basis of their difference in backscatter at 38 and 120 ... kHz (ΔMVBS = MVBSI20- MVBS3S; where ΔMVBS between 2 & 12 dB). Biomass values estimated from krill ...
Meeting Document : WG-EMM-97/46 : Auteur(s): Watkins, J.L., Brierley, A.S.
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Biomass/CCAMLR krill review
Abstract: Current knowledge of the ecology, biology and life history of the Antarctic krill ... which are either directly or indirectly applicable to the effective management of krill exploitation ... distribution of krill on various scales ranging from the global to individual aggregations (e.g., swarms) is ... stock separation considered. Recent attempts to assess the krill standing stock directly are examined ...
Meeting Document : SC-CAMLR-VII/BG/39 : Auteur(s): D.G.M. Miller and I. Hampton (South Africa)
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Some comments on the procedure of krill target strength assessment in echosurveys
in echosurveys is discussed. It is known that krill abundance and biomass estimation should be ... trawl selectivity and catchability. Krill abundance estimation related to TS target strength values ... : assessment of MSBS (MVBS) acoustic parameter distribution and krill length (weight) distribution in the study ... measuring system. However, the information obtained in that case provides not only total krill abundance ...
Meeting Document : WG-EMM-98/21 : Auteur(s): S.M. Kasatkina (Russia)
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Krill density, biomass, proportional recruitment and recruitment index in the elephant island region during the period 1977 to 1997
Abstract: The Elephant Island long-term data set was updated for krill density and proportional ... recruitment. Krill biomass (from net sampling surveys) and absolute recruitment are introduced as additional ... /95 and an average 1995/96 krill year-class (below average for proportional recruitment, average for ... absolute recruitment). After a period of low krill density in the area for almost a decade, krill density ...
Meeting Document : WG-EMM-97/29 : Auteur(s): Loeb, V., Siegel, V., Gröger, J.
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Distribution, biomass and abundance of Antarctic krill in the vicinity of Elephant Island during the 1996 austral summer
during the 1996 austral summer indicate very good krill recruitment from spawning in 1994/5. Areas of ... high krill density were mapped north of King George and Elephant Islands where water depth was greater ... than 200m. One-year old juvenile krill numerically dominated catches during the first survey in January ... adult krill were caught during both surveys north of the islands, but were numerically dominate only ...
Meeting Document : WG-EMM-96/23 : Auteur(s): Demer, D.A., Hewitt, R.P., Loeb, V.
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Distributions and predator-prey interactions of macaroni penguins, Antarctic fur seals, and Antarctic krill near Bird Island, South Georgia
. Simultaneous surveys of marine birds, Antarctic fur seals and Antarctic krill were conducted along a series of ... between the distributions of predators and their prey with respect to the abundance of krill in the water ... correlations with Antarctic krill density across a wide range of spatial scales. Because krill was abundant ... factored out, we were able to demonstrate an additional influence of Antarctic krill abundance at ...
Meeting Document : WG-CEMP-93/12 : Auteur(s): G.L. Hunt, Jr (USA), D. Heinemann (USA) and I. Everson (United Kingdom)
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Antarctic krill populations in the outflow region of the north-western Weddell Sea
Abstract: A meso-scale zooplankton and krill net sampling survey was carried out in the north ... March 2013. The aim of the survey was to study the zooplankton composition and krill abundance and ... survey area was covered by ice during the summer season. Antarctic krill densities were found to be ... highest in the western Peninsula region and lower in ice-covered Weddell Sea waters. Overall krill density ...
Meeting Document : WG-EMM-13/24 : Auteur(s): V. Siegel (European Union)
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Progress by WG-EMM-STAPP in estimating krill consumption by air-breathing predators within CCAMLR areas
Abstract: This paper summarises progress by WG-EMM-STAPP in estimating krill consumption by air ... -breathing predators in CCAMLR management units. There have been significant advances in estimating krill ... are now available for Areas 48, 88 and 58. Krill consumption by crabeater seals, the most important ... krill-consuming seal species, has been estimated in Areas 48 and 58. Large-scale estimates of breeding ...
Meeting Document : WG-EMM-16/68 : Auteur(s): C. Southwell and P. Trathan