Search results
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Relationship between distribution of Antarctic krill (Euphausia superba) and environmental index MTEM-200 in the Antarctic Ocean throughout the year
Abstract: Antarctic krill (Euphausia superba) is the key species of the Antarctic marine ... ecosystem and human fishing resources. Essentially, relationships between krill distribution ... the entire Antarctic Ocean. To clarify the relationship between krill distribution of krill and oceanographic ... environment, we have analysed two datasets combined. One is krill fishing records from 1973 to 2008 from ...
Meeting Document : WG-EMM-08/32 : Author(s): M. Naganobu, T. Kitamura and K. Hasunuma (Japan)
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Impacts of rising sea temperature on krill increase risks for predators in the Scotia Sea
of Antarctic krill, Euphausia superba, might affect populations of krill and dependent predators (whales ... for predators by curtailing krill fishing at different points in the 21st century. The projected effects ... of ocean warming on krill biomass were strongest in the northern Scotia Sea, with a ≥ 40% decline ... in the mass of individual krill. Projections also suggest a 25% chance that krill biomass will fall below ...
Meeting Document : WG-EMM-18/P02 : Author(s): E.S. Klein, S.L. Hill, J.T. Hinke, T. Phillips and G.M. Watters
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Chinstrap penguins alter foraging and diving behaviour in response to krill size
to changes in prey availability. Chinstrap penguins are dependent predators of Antarctic krill in the Scotia ... Sea region. Both the sizes of krill found in penguin diets and acoustic estimates of krill biomass ... recorders (TDRs) over five seasons: 2002-06. When krill were smaller, chinstrap penguins often exhibited ... the daytime. The average annual size of krill was negatively correlated to the number of penguins foraging ...
Meeting Document : WG-EMM-07/11 : Author(s): A.K. Miller and W.Z. Trivelpiece (USA)
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Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 on the basis of the Soviet mesoscale surveys with Isaacs Kidd midwater trawl
area of krill between Antarctic Peninsula and South Georgia Island are considered. Surveys including ... to the standard method by Isaacs Kidd Midwater Trawl in the layer 0-100 m. Krill biomass distribution (g/1000 m3 ... . The results of surveys confirm modern understanding of general pattern of krill distribution and drift ... -temporal stability of the krill distribution field with more higher biomass of aggregations was observed ...
Meeting Document : WG-EMM-98/32 : Author(s): V.A. Sushin and K.E. Shulgovsky (Russia)
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Multiple acoustic estimates of krill density at South Georgia during 2000/2001 reveal significant intra-annual and spatial variability
Abstract: Three separate acoustic surveys of Antarctic krill (Euphausia superba) were conducted ... extensive coverage around South Georgia. Krill density in the western box in the early-season survey ... that is consistent with observations from previous years, krill density in the western box mid-season was less than ... difference between the mean krill density derived from only those 4 transects surveyed early- and late-season ...
Meeting Document : WG-EMM-01/15 : Author(s): A.S. Brierley, C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst (United Kingdom)
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Measurements of sound-speed and density contrasts of Antarctic krill (Euphausia superba) on board RV Kaiyo Maru
Abstract: In order to calculate the target strength of Antarctic krill (Euphausia superba) using ... contrasts between the animal and the surrounding water are required. Sound-speed and mass-density of krill ... and 2004/2005. Samples of krill were caught by a RMT(1+8). Mass-density of krill was measured by density ... . The corresponding sound-speed contrast of krill with mean total lengths of 44.2mm was 1.011 in the South Shetland ...
Meeting Document : WG-EMM-08/56 Rev. 1 : Author(s): Y. Takao, H. Yasuma, R. Matsukura, K. Amakasu and M. Naganobu (Japan)
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Krill population trends
Abstract: Krill (Euphausia superba) distribution and abundance data are available from a number ... fisheries data and from the distribution of krill predators. Each of these forms of data collection has its ... own biases and limitations and our current understanding of krill distribution and abundance comes ... krill, based mainly on analysis of available scientific net data. There is also evidence of intense ...
Meeting Document : CCAMLR-IWC-WS-08/11 : Author(s): Tarling, G., Watkins, J., Quetin, L., Reiss, C., Atkinson, A., Ross, R., Pakhomov, E., Kawaguchi, S., Nicol, S., Siegel, V.
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Quantifying the escape mortality of trawl caught Antarctic krill (Euphausia superba)
Abstract: Antarctic krill (Euphausia superba) is an abundant fishery resource, the harvest levels ... of which are expected to increase. However, many of the length classes of krill can escape through commonly ... fishing gear. The methods for determining fishing mortality in krill are still poorly developed. We used ... mortality rates of escaped krill. Haul duration, hydrological conditions, maximum fishing depth and catch ...
Meeting Document : WG-EMM-16/04 : Author(s): B.A. Krafft, L.A. Krag, A. Engås, S. Nordrum, I. Bruheim and B. Herrmann
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Preliminary results from the International Synoptic Krill Survey in Area 48, 2019
Abstract: Preliminary results from the International Synoptic Krill Survey in Area 48, 2019 ... results from four (vessels from the Association of Responsible Krill harvesting companies (ARK), Norway ... , which were based on the methods and procedures used in the CCAMLR 2000 krill acoustic survey ... . Backscatter from krill were delineated using the 'swarms' method and integrated to produce ...
Meeting Document : WG-EMM-2019/47 : Author(s): G. Macaulay, G. Skaret, T. Knutsen, O.A. Bergstad, B. Krafft, S. Fielding, S.G. Choi, S. Chung, K. Demianenko, V. Podhornyi, K. Vishnyakova, L. Pshenichnov, A. Chuklin, A. Shishman and M.J. Cox
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Biomass results from the International Synoptic Krill Survey in Area 48, 2019
Abstract: Results from the International Synoptic Krill Survey in Area 48, 2019, are presented ... and procedures used in the CCAMLR 2000 krill acoustic survey. Backscatter from krill were delineated using ... the ‘swarms’ method and integrated to produce distribution maps of krill areal density and survey standing ... stock estimates. Krill areal density for the CCAMLR 2000 strata was 35.2 gm-2, producing a standing ...
Meeting Document : SG-ASAM-2019/08 Rev. 1 : Author(s): G. Macaulay, G. Skaret, T. Knutsen, O.A. Bergstad, B. Krafft, S. Fielding, S. Choi, S. Chung, K. Demianenko, V. Podhornyi, K. Vishnyakova, L. Pshenichnov, A. Chuklin, A. Shishman, X. Wang, X. Zhao and M. Cox