Search results
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MULTIPLE TIME SCALES OF VARIABILITY IN THE KRILL POPULATION AT SOUTH GEORGIA
Abstract: The South Georgia region supports a high biomass of krill that is the subject to high ... inter-annual variability. The lack of a self-sustaining krill population at South Georgia means ... ecosystem-based management of any krill fishery in the region. Krill acoustic density data from surveys ... conducted in the early, middle and late period of the summers of 2001 to 2005, together with krill ...
Meeting Document : WG-EMM-08/48 : Author(s): K. Reid, J. Watkins, E. Murphy, P. Trathan, S. Fielding and P. Enderlein (United Kingdom)
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Using carapace measurements to determine the sex of Antarctic krill (Euphausia superba)
Abstract: Krill carapaces measurements have been used to reconstruct krill length frequencies ... allometric equations for calculating total length from carapace length, were derived from South Georgia krill ... have not been validated using locally sampled krill. This study reports on a three year study ... validating the use of discriminant functions to determine sex of krill based on carapace length and width ...
Meeting Document : WG-EMM-05/26 : Author(s): J.D. Lipsky, M.E. Goebel, C.S. Reiss and V. Loeb (USA)
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Possible approaches to the evaluation of the Antarctic krill mortality
on the base of summaryed data on Krill age groups singled out using method of Harding.Parameters obtained were ... used to calculate total Krill mortality using different methods applyed earlier only to the fish ... . The most real values varied from 0.75 to 1,17. No fishery impact on various parameters of the krill ... approaches to the evaluation of the Antarctic krill mortality Approval: Approved ...
Meeting Document : WG-KRILL-92/08 : Author(s): L.G. Maklygin and V.I. Latogursky (Russia)
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Krill population dynamics at South Georgia: implications for ecosystem-based fisheries management
Abstract: The South Georgia region supports a large biomass of krill that is subject to high ... interannual variability. The apparent lack of a locally self-maintaining krill population at South Georgia ... to successful ecosystem-based management of krill fishery in the region. Krill acoustic-density data from ... surveys conducted in the early, middle and late period of the summers of 2001 to 2005, together with krill ...
Meeting Document : WG-EMM-10/P08 : Author(s): K. Reid, J.L. Watkins, E.J. Murphy, P.N. Trathan, S. Fielding and P. Enderlein
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Estimating krill recruitment and its variabiliity
Abstract: A maximum likelihood method is developed for the decomposition of krill density ... of the Southern Ocean give a mean recruitment rate for one year old krill of 0.339 with a standard deviation ... of 0.100. The corresponding results for two year old krill from 9 surveys are 0.552 and standard deviation ... (Australia) Title: Estimating krill recruitment and its variabiliity Approval: Approved ...
Meeting Document : WG-KRILL-93/12 : Author(s): W. de la Mare (Australia)
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CPUEs and body length of Antarctic krill within commercial hauls of polish trawler FV Lepus in the fishing ground off South Orkneys in January and February 1991
Abstract: Length composition of krill in diurnal and night hauls of FV Lepus, off S. Orkneys ... in January and February 1991, generally show similar pattern. The proportion of bigger individuals of krill ... those in January. No larval fish were recorded in krill catches. Only few specimens of Electrona ... and R. Zaporowski (Poland) Title: CPUEs and body length of Antarctic krill within commercial hauls of polish ...
Meeting Document : WG-KRILL-91/37 : Author(s): I. Wójcik and R. Zaporowski (Poland)
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Sounds like more krill
Abstract: Antarctic krill, Euphausia superba, comprise the foundation of the food-web ... in the Southern Ocean and are the target of a large fishery. Recently, the total abundance of krill in the Scotia ... for the Conservation of Antarctic Marine Living Resources (CCAMLR) to revise the precautionary catch level for krill ... energy attributed to krill, scaled by the Greene et al. model of krill acoustical reflectivity or target ...
Meeting Document : WG-EMM-04/41 : Author(s): D.A. Demer and S.G. Conti (USA)
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An evaluation of reduced target strength estimates reported for krill (Euphausia superba)
on the same experiment and report new calculations of the target strength of krill (Euphausia superba ... ) that propose questioning previous measurements of krill target strength and estimates of abundance derived from ... that they are being cited as a basis for increasing the estimates of krill standing stock in the Antarctic ... krill on the number of krill used to measure it), and contain or are likely to contain an error due ...
Meeting Document : WG-KRILL-90/13 : Author(s): M.C. Macaulay (USA)
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Background information to support development of a feedback management strategy for the krill fishery in Subarea 48.1
and information needed to support development of a feedback management strategy for the krill fishery in Subarea ... negatively impacting the krill fishery while simultaneously mitigating risks to krill-dependent predators. We ... . In the second vignette, we examine the influence of oceanic and shelf circulation on the distribution of krill ... mechanisms aggregate krill in fishable quantities above the background concentration. We use a circulation ...
Meeting Document : WG-EMM-16/45 : Author(s): Antarctic Ecosystem Research Division, Southwest Fisheries Science Center and NOAA Fisheries
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Krill population dynamics at South Georgia 1991–1997, based on data from predators and nets
Abstract: Central to understanding krill population dynamics is knowledge of their population ... structure. To examine this we used length-frequency distributions from 142 weeks of sampling (n= 23996 krill ... ) of 3 predator species breeding at South Georgia and 12 weeks of sampling (n = 10 252 krill) from scientific nets ... overall krill population. Greatest similarity results from comparing net samples with samples from ...
Meeting Document : WS-AREA 48-98/15 : Author(s): K. Reid, J. Watkins, J. Croxall and E. Murphy (UK)