Search results
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Natural fluctuations in the abundance of krill with due regard to global climate changes in the southern hemisphere: forecasting possibilities
" in the reproduction of krill (Euphausia superba) and salp (Salpa tompsoni) (SC-CAMLR-XVI4; SC ... the strong year-classes of krill and severe winters when the ice-cover extended itself northwards ... generations of krill were formed during the years when the winter position of the ice edge was south ... of the average multiannual level. The abundance of salp went up sharply in the areas of krill distribution ...
Meeting Document : WG-EMM-98/52 : Author(s): K. Shust (Russia)
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Two decades of variability in krill predators at Bird Island, South Georgia and their potential as ecosystem indicators
included foraging performance, offspring survival, offspring mass, the contribution of Antarctic krill ... survival and mass). Krill in the diet was correlated across the three bird species (gentoo, Pygoscelis ... penguins. Offspring survival and hence PRP were largely independent of krill in the diet for macaroni ... the variability associated with krill availability. This was characterised by skewed anomalies with more ...
Meeting Document : WG-EMM-12/16 : Author(s): S.L. Hill, C.M. Waluda, H.J. Peat and S. Fielding (United Kingdom)
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Are penguins and seals in competition for Antarctic krill at South Georgia?
of Antarctic krill. In recent years the population of fur seals has increased whereas that of macaroni penguins ... has declined. Both species feed on krill of similar size ranges, dive to similar depths ... activity were significantly spatially segregated. Over the last 12 years the prevalence of krill ... in the diet of the two predators differed with less krill in the diet of macaroni penguins than Antarctic fur ...
Meeting Document : WG-EMM-01/22 : Author(s): K.E. Barlow, I.L. Boyd, J.P. Croxall, I.J. Staniland, K. Reid and A.S. Brierley (United Kingdom)
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A revised assessment of the impact of the krill fishery on penguins in the South Shetlands
krill (Euphausia superba) fishery and penguins (WG-Krill-93/7). Main fishing areas were confined ... with areas of high krill abundance. The overlap between trawling depth and foraging dive depth of penguins ... was also insignificant. Furthermore, less similarity between krill caught by trawlers and those captured ... and penguins. Krill biomass was estimated to be as large as 200-1500 xl03 tonnes within the preferred fishing ...
Meeting Document : WG-Joint-94/17 : Author(s): T. Ichii, M. Naganobu and T. Ogishima (Japan)
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Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts
krill fishery data for understanding reasons of this ‘high CPUE’ regime. The authors present ... the analysis of spatial- temporal variability of krill fishery based on CPUE trends, trawling duration, catch ... the reason for the changes in sea ice locations and krill abundance and distribution affecting fishery ... in long-term fishery. We suggest that information on variability of krill fishable biomass distribution ...
Meeting Document : WG-EMM-14/21 : Author(s): S. Kasatkina and P. Gasyukov (Russia)
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Distribution and size-age composition of Antarctic krill in the South Orkney Islands region (CCAMLR Subarea 48.2)
Abstract: This paper describes distribution and size-age composition of Antarctic krill ... /2009 and 2009/2010 seasons. All age cohorts of krill passed spawning during the season 2008/2009, while ... in anomalous cold 2009/2010 season significant proportion of krill of cohort 2+ skipped spawning. Individuals ... of Antarctic krill in age 1+ were absent in catches in both 2008/2009 and 2009/2010 seasons. Possible reasons ...
Meeting Document : WG-EMM-10/16 : Author(s): D.O. Sologub and A.V. Remeslo (Russia)
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Estimating Antarctic krill density from multi-beam observations using distance sampling methods
and processing of acoustic data from fishing vessels. Some krill fishing vessels are equipped with scanning ... sampling theory- that provides a general means for estimating krill density and biomass from vertically ... to the constraints of krill target strength models, acoustic instrument stability, and survey design allow the use ... of data observed with horizontally oriented multi-beam and scanning sonars to contribute to krill ...
Meeting Document : SG-ASAM-12/05 : Author(s): M.J. Cox (Australia)
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Describing krill: swarms or integration intervals?
Abstract: CCAMLR anticipates that acoustic data collected from krill fishing vessels ... will be incorporated into krill feed back management. Acoustic data collected from fishing vessels may have different ... may contain seabed aliased echoes and instrument cross-talk. Analysing acoustic data on a krill-swarm ... , I estimated mean areal krill density for a small (65 km by 60 km) survey conducted in the waters off Mawson ...
Meeting Document : SG-ASAM-17/02 : Author(s): M.J. Cox
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A proposal for a Krill Ageing Inter-laboratory Calibration Workshop
Abstract: The Working Group stressed the urgency of standardising ageing method for krill ... . Information on krill age is fundamental to establishing an accurate growth curve and to calculate ... to standardise krill ageing protocol, as outlined in WG-EMM-19/45. We seek Scientific Committee’s endorsement ... of the draft terms of reference and the budget for the Krill Ageing workshop as described in this paper. Author ...
Meeting Document : SC-CAMLR-38/13 : Author(s): Delegations of Australia, China, Japan, Norway and the USA
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A RE-ANALYSIS AND UPDATE OF THE ANTARCTIC KRILL BIOMASS IN THE SOUTH SHETLAND ISLANDS, THROUGH 2011
Abstract: Acoustically based estimates of Antarctic krill (Euphausia superba) biomass, and net ... -based estimates of krill density and recruitment are recalculated for the years 1996 through 2011 ... . The time series of acoustic biomass indicate that krill have varied by more than an order of magnitude over ... that 2011 was a year of good recruitment, following two years of low recruitment. Krill biomass ...
Meeting Document : WG-EMM-11/26 : Author(s): A. Cossio, C. Reiss and R. Driscoll (USA)