Search results
-
KRILL DENSITY ESTIMATES IN CCAMLR SUBAREA 48.6 BASED ON ACOUSTIC DATA COLLECTED DURING JANUARY–MARCH 2008
of the Antarctic Krill and Ecosystem Studies (AKES) from January to March 2008. Acoustical data were sampled ... S in the sparsely studied CCAMLR subarea 48.6. The mean density of Antarctic krill, integrated to 270 m depth ... was 4.42 g/m2. The krill were mainly found in strong aggregations and were patchily distributed ... . The majority of the detected krill was distributed between 40 and 80 m depth, and approximately 14 ...
Meeting Document : WG-EMM-09/45 : Author(s): G. Skaret, B.A. Krafft and R. Korneliussen (Norway)
-
A multiple-frequency method for identifying and assessing the Antarctic krill stock in the Ross Sea (1989/90, 1997/98 and 1999/2000)
in the Italian expeditions to the Ross Sea to discriminate Euphausia superba (krill) aggregations from Euphausia ... and applied to estimate krill biomass in the area of Ross Sea (22000 nm2), investigated from 19 to 26 December ... 1997. It results that krill biomass estimated by the criteria based on multiple frequency method ... is 8.87% lower than krill biomass estimated using conventional methods (net samplings and/or echogram ...
Meeting Document : WG-EMM-00/37 : Author(s): M. Azzali, J. Kalinowski and G. Lanciani (Italy)
-
A summary of scientific observer deployments and data collection in the krill fishery during the 2011, 2012 and 2013 seasons
Abstract: The level of observer coverage in the krill fishery and the scientific sampling ... undertaken are summarised. During 2012 all 12 of the vessels that participated in the krill fishery carried ... observations of krill length measurements were collected on 375 ‘days’ and fish bycatch was measured on 554 ... ‘days’. Krill length-frequency distributions showed that the greatest variability in size structure ...
Meeting Document : WG-EMM-13/38 : Author(s): CCAMLR Secretariat
-
Summary of notifications for krill fisheries in 2010/11
Abstract: Seven Members submitted notifications for a total 15 vessels for krill fisheries ... submitted for exploratory fisheries for krill in 2010/11. The total notified, expected level of catch ... of krill in 2010/11 is 410000 tonnes. Author(s): Secretariat Title: Summary of notifications for krill ... Seven Members submitted notifications for a total 15 vessels for krill fisheries in Subareas 48.1 ...
Meeting Document : WG-EMM-10/06 : Author(s): Secretariat
-
Uncertainty in acoustic surveys of Antarctic krill
Abstract: Studied were four primary sources of uncertainty in krill density estimates from ... with a standard sphere were estimated as-1.2 dB and ±0.3 dB, respectively. Uncertainty in estimating krill TS ... (Demer and Martin, 1995). Therefore, the accuracy and precision krill TS estimates were conservatively ... contributed to a positive bias in the krill density estimates of 0.6 dB. Finally, uncertainty due to the diel ...
Meeting Document : WG-EMM-95/72 : Author(s): Demer, D.A.
-
Surface water masses, primary production, krill distribution and predator foraging in the vicinity of Elephant Island during the 1989-90 austral summer
and primary productivity, the distribution and demography of krill, and the foraging patterns of krill ... as the western end of the Weddell-Scotia Confluence. Krill abundance increased approximately 5-fold over ... of the study area. Krill sampled throughout the observation period were reproductively mature and exhibited ... , overall mean size increased from 41.8 mm in January to 44.3 mm in February. Krill composed 99% of the diet ...
Meeting Document : WG-CEMP-90/11 : Author(s): A.F. Amos, J.L. Bengtson, O. Holm-Hansen, V.J. Loeb, M.C. Macaulay and J.H. Wormuth (USA)
-
Krill distribution patterns in the Atlantic sector of the Antarctic during the CCAMLR-2000 Survey
of the large scale krill biomass in the South Atlantic Sector of the Antarctic. Four vessels from Japan, Russia ... targets. Analyses on the combined data sets from the net sampling program indicate that krill distribution ... juvenile and subadult krill mainly occurred east of the South Orkney Islands. Adult krill predominately ... krill larger than 50 mm mean size was found to the north of cluster 2, but at the same time was mostly ...
Meeting Document : WG-EMM-00/6 Rev. 1 : Author(s): V. Siegel (Germany), S. Kawaguchi (Japan), F. Litvinov (Russia), V. Loeb (USA) and J. Watkins (United Kingdom)
-
Krill CPUE standardisation and comparison with acoustic data based on data collected from Chinese fishing vessels in Subarea 48.1
Abstract: The usability of CPUE data as Antarctic krill abundance index was a widely discussed ... per day data. The veridical distribution and movement of krill could be important source ... to indicate the krill stock abundance should be very caution. However, the dynamics of CPUE could indicate ... the changing trends of the density of krill in the water close to sea surface, which may be concerned by krill ...
Meeting Document : WG-EMM-17/41 : Author(s): Y. Ying, X. Wang, J. Zhu and X. Zhao
-
Revised outline of the dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season by the Japanese survey vessel, Kaiyo-maru
Abstract: A dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season ... will be conducted by Japanese research vessel, Kaiyo-maru. No krill biomass has been estimated in the Division since ... Australia carried out BROKE in 1996. There are two main objectives of our survey: (1) estimation of krill ... changes if any. The krill survey (echosounder–EK80 and RMT) and subsequent biomass estimation will follow ...
Meeting Document : SG-ASAM-18/03 : Author(s): H. Murase, K. Abe, R. Matsukura, H. Sasaki and T. Ichii
-
Swarm characteristics of Antarctic krill Euphausia superba relative to the proximity of land during summer in the Scotia Sea
and swarming characteristics of Antarctic krill across the Scotia Sea in January and February 2003. Krill ... zone compared to <80 m 2 further offshore. The packing concentration of krill within inshore swarms ... number of swarms per km and krill acoustic biomass per km was found in the 50 to 100 km zone. However ... regions. Krill are likely to move between inshore and offshore environments continuously over ...
Meeting Document : WG-EMM-10/P09 : Author(s): T. Klevjer, G.A. Tarling and S. Fielding