Search results
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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 ... of krill consumption by penguins to be developed in all Areas in the near future. Work to partition krill ...
Meeting Document : WG-EMM-16/68 : Author(s): C. Southwell and P. Trathan
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Observation on interactions between marine mammals and krill mid-water trawl
Abstract: An observation on the interaction between marine mammal and krill midwater trawl ... was carried out onboard the Chinese krill fishing vessel Fu Rong Hai during the 2018/19 fishing season ... observed either. The observation found the Antarctic fur seals would be attracted by the codend of krill ... . Future researches on the interaction between marine mammals and krill fishing gears would be helpful ...
Meeting Document : SC-CAMLR-38/BG/20 : Author(s): Y. Ying, G. Fan, X. Zhao, J. Zhang, X. Wang and J. Zhu
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Observer activities on Japanese krill fishing vessels in the CCAMLR Convention Area
Abstract: Unlike toothfish fishery, IUU fishery is not a serious concern in krill fishery ... . Although the increase of expected catch of krill notified in recent years has caused concerns among some ... there is no urgent management concern related to krill fishery. In addition, CCAMLR XXV agreed “that the priorities ... for scientific observers (for krill fishery) were to collect data to: (i) compare fishing methods, (ii) determine ...
Meeting Document : CCAMLR-XXVI/BG/41 Rev. 1 : Author(s): Delegation of Japan
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Target strength estimation of Antarctic krill, Euphausia superba by cooperative experiments with commercial trawlers
Abstract: An estimate of target strength of Antarctic krill, Euphausia superba was obtained ... by a series of cooperative experiments between research vessel and commercial krill trawler. Estimated target ... strength per 1g wet weight of Antarctic krill was-66.ldB a t the frequency of 200kHz. Average size of krill ... was 47.48mm and 0.873g. Author(s): Delegation of Japan Title: Target strength estimation of Antarctic krill ...
Meeting Document : SC-CAMLR-VIII/BG/30 : Author(s): Delegation of Japan
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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 : Author(s): S. Miwa, T. Kamaishi, T. Matsuyama, T. Hayashi and M. Naganobu
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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 ... 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 identified using ...
Meeting Document : WG-EMM-97/46 : Author(s): Watkins, J.L., Brierley, A.S.
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Orientation of Antarctic krill in an aquarium
Abstract: Acoustic methods appear to be the best way to estimate Antarctic krill abundance ... directly. Information on body orientation, however, is needed to obtain reliable krill acoustic target ... strength (TS) values, since TS varies with body orientation. Krill body orientation was measured ... (s): Y. Endo (Japan) Title: Orientation of Antarctic krill in an aquarium Approval: Approved ...
Meeting Document : WG-KRILL-93/24 : Author(s): Y. Endo (Japan)
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An acoustic estimation of krill densities to the north of South Georgia in January 1994
strength between the two frequencies (δMVBS = MVBS 120 kHz- MVBS 38 kHz) was used to discriminate krill ... from other acoustic targets. A generic target strength to weight relationship was used to derive krill ... densities from 120 kHz signals attributed krill. At less than 1 g m-2, mean weighted krill densities in both ... evidence of an extreme krill paucity around South Georgia in the 1993/4 season. Author(s): Watkins, J.L ...
Meeting Document : WG-EMM-95/74 : Author(s): Watkins, J.L., Brierley, A.S.
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Krill biomass estimates for two survey boxes to the north east and north-west of South Georgia in January 1996: the beginning of a five-year monitoring program
variability in the abundance of the Antarctic krill Euphausia superba in the South Georgia region ... , and to provide krill biomass estimates for management purposes. Survey box 1 was located to the north-east ... numerous observations of elevated krill abundance have been made. Box 2 was located to the north of Bird ... Island, within a foraging area of prime importance for breeding krill predators. Together the two boxes ...
Meeting Document : WG-EMM-96/18 : Author(s): Watkins, J.L., Murray, A.W.A., Brierley, A.S.
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The structure and spatial distribution of Antarctic krill aggregations from acoustic observation in the South Georgia area
significant distinctions in spatial distribution patterns of krill in the northwestern and the northeastern ... -attractive to fishery. The observed grounds with krill density exceeding the threshold value 100 g/m2 ... of krill aggregations structure in the northwestern and the northeastern parts of South Georgia area allows ... of dependent predators than krill distribution in the form of dense swarms or patches, which on the contrary ...
Meeting Document : WG-EMM-04/66 Rev. 1 : Author(s): S.M. Kasatkina (Russia)