Résultats de la recherche
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Design of the Italian acoustic survey in the Ross Sea for the Austral summer 2003/04
-2004. The research consists of three core activities: (1) Acoustic sampling on krill (E. superba and E ... . crystallorophias) populations and concurrent censuses of their top predators for estimating krill distribution and ... abundance, and the effects of predators on altering them; (2) Net sampling for describing krill demography ... masses which influence krill ecological behaviour. All these activities will be undertaken synoptically ...
Meeting Document : WG-EMM-02/31 : Auteur(s): M. Azzali, A. Sala and S. Manoukian (Italy)
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Acoustic visualization of the three-dimensional prey field of foraging chinstrap penguins
Antarctic krill, a keystone prey species in the Southern Ocean food web. It has been difficult to evaluate ... these concerns because of problems associated with determining the availability of krill to their ... natural predators. Here, we report a novel method for assessing prey availability to an important krill ... -dimensional distribution of krill within a 1852 X 1852 X 100 m volume of ocean. Our study revealed the ...
Meeting Document : WG-Joint-94/12 : Auteur(s): J.E. Zamon, C.H. Greene, E. Meir, D.A. Demer, R.P. Hewitt and S. Sexton (USA)
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What’s the catch? Profiling the risks and costs associated with marine protected areas and displaced fishing in the Scotia Sea
evaluated two MPA scenarios and associated displacements of the Antarctic krill fishery in the Scotia Sea by ... quantifying their potential to affect risks of depleting krill-dependent predators and costs to the fishery ... of krill fishing and krill-dependent predators) and a dynamic risk assessment (based on a minimally ... displaced catches. We found that neither MPA scenario increased the risks of depleting krill predators when ...
Meeting Document : WS-SM-18/P03 : Auteur(s): E.S. Klein and G.M. Watters
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Some notes on by-catch of fishes and salps caught by the fishery vessel Niitaka Maru in the vicinity of the South Shetland Islands (January to February 1999)
Abstract: Scientific observations on fishes and salps incidentally caught during commercial krill ... hauls and those estimated value was 20 to 3560 ind./t of krill. By-catch fishes fed on Thysanoessa ... macrura and Euphausia superba was not found in their stomachs. Abundance of salps in krill catches could ... have been depended on the density of krill concentration. At least, the large incidental catch of salps ...
Meeting Document : WG-EMM-00/54 : Auteur(s): T. Iwami, S. Kawaguchi and M. Naganobu (Japan)
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Report of the Workshop for the International Coordinated Survey in conjunction with CCAMLR-2000 Survey
krill density; near the east end of Elephant Island, mid-way between Elephant and King George Islands ... krill move closer to the shelf break as the season progresses. This apparent movement is complemented by ... a change in the demographic structure of the population. The smaller size modes disappear and krill ... measurement errors, then the consistency between the four other surveys suggests low variability in krill ...
Meeting Document : WG-EMM-01/68 : Auteur(s): Delegations of Japan, Rep. of Korea, USA and Peru
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MULTIPLE INDICATORS SUGGEST A STRONG ECOSYSTEM ANOMALY AT SOUTH GEORGIA IN 2009
metrics for birds, seals and fish seems to be connected with the availability of Antarctic krill ... , surveys of krill and mackerel icefish, and monitoring of land-based predators. Each of these data sources ... warm water inflow were followed by reduced icefish catches, a paucity of krill in icefish and penguin ... diets and low krill biomass in the regularly surveyed “Western Core Box”. Consequently many of the ...
Meeting Document : WG-EMM-09/23 : Auteur(s): S. Hill, M. Belchier, M. Collins, S. Fielding, E. Murphy, P. Trathan, H. Venables and C. Waluda (United Kingdom)
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Relationships between distribution of two euphausiid species and oceanographic characteristics in the Ross Sea (January–February 2000)
, devoted to study two krill species (Euphausia superba and Euphausia crystallorophias), was carried out in ... samples were considered the ground truth data, being compared to the acoustic estimates of krill species ... and size. Characteristics (dimensions, volume, weight, krill mean length) for each krill swarm were ... determined, and the krill average biomass per squared nautical miles was computed along the ship route track ...
Meeting Document : WG-EMM-02/38 : Auteur(s): A. Russo, M. Azzali, E. Biffi, G. Lanciani and E. Paschine (Italy)
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Analysis of the diet of Champsocephalus gunnari in Subarea 48.3, Dr E. Holmberg survey, February 1995
Subarea 48.3 in February 1995, were analyzed using the frequency of occurrence (%) method. Krill ... %), followed in importance by the mysid Thysanoessa sp. (35%) and krill (24%). The picture around SG was found ... krill availability indicated by frequency of occurrence, but, on the other hand, high proportions of ... empty stomachs (also at Shag Rocks), close to the values reported for years of krill scarcity. While no ...
Meeting Document : WG-FSA-95/36 : Auteur(s): Marschoff, E., Barrera-Oro, E., Casaux, R.
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Population subdivision and distribution of Euphausia superba in the region of the Antarctic Peninsula and adjacent waters in relation to fishery development
krill and the waters of two major circulation systems- those of the Weddell Sea and the Bellingshausen ... while the proportion of the Weddell Sea krill increases eastward, primarily in the Bransfield Strait but ... result from the fact that waters of each of the two major modifications carry out krill into the eastern ... part of the region at different times. Isaacs-Kidd trawl surveys yielded krill biomass values of 1233 ...
Meeting Document : SC-CAMLR-VIII/BG/21 : Auteur(s): Delegation of USSR
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Integrating Climate and Ecosystem Dynamics in the Southern Ocean (ICED) programme: Report of the ICED–CCAMLR Projections Workshop, 5 to 7 April 2018
modellers and fisheries scientists to consider the potential impacts of climate change on Antarctic krill in ... reduction in the abundance and biomass of krill in northern areas of the Scotia Sea but an increase in ... capacity of krill to withstand such changes is poorly determined; The combined effects of changing sea ice ... and krill abundance will result in shifts in the distribution of the various krill-dependent species ...
Meeting Document : SC-CAMLR-XXXVII/BG/16 : Auteur(s): E. Murphy, N. Johnston, S. Corney and K. Reid