Résultats de la recherche
Can the length composition of krill in predator diets provide information on the age-dependence of krill natural mortality?
of krill is split between predator species. This method uses data on the length distribution of krill ... from predator stomachs. The proportions estimated depend, through the krill yield model, on the ... schedule of krill natural mortality at age. In principle, such a method would allow inferences about this ... ., Butterworth, D.S. Title: Can the length composition of krill in predator diets provide information on the age ...
Meeting Document : WG-EMM-95/40 : Auteur(s): Thomson, R.B., Butterworth, D.S.
Proposal for an acoustic krill biomass survey in CCAMLR Subarea 48.1 in relation to the hydrological environment and in conjunction with carbon cycling and temperature adaptation experiments of krill and salps
Marine Living Resources (CCAMLR), we will conduct an acoustic krill (Euphausia superba) biomass survey in ... ) investigating the role of krill and salps in Southern Ocean carbon cycling and the temperature adaptation ... of the krill habitat. The overall objective of the German contribution is to provide an overarching ... assessment of the effect of climate change on krill and associated ecosystem-processes. The aim of this ...
Meeting Document : WG-EMM-17/39 : Auteur(s): B. Meyer, L. Suberg, S. Fielding, O.R. Godø and C. Reiss
Report from the annual survey of Antarctic krill and apex predators distribution at South Orkney Islands in 2014, and assessing escape mortality of krill in trawls
conducted around the South Orkney Islands, using a commercial krill fishing vessel as research platform. The ... Antarctic krill as well as the occurrence and distribution of krill predators. Author(s): B.A. Krafft ... annual survey of Antarctic krill and apex predators distribution at South Orkney Islands in 2014, and ... assessing escape mortality of krill in trawls Approval: Approved ...
Meeting Document : WG-EMM-14/16 : Auteur(s): B.A. Krafft (Norway), L.A. Krag (Denmark), T.A. Klevjer, G. Skaret and R. Pedersen (Norway)
IMPLEMENTATION OF FOOSA (KPFM) IN THE EPOC MODELLING FRAMEWORK TO FACILITATE VALIDATION AND POSSIBLE EXTENSION OF MODELS USED IN EVALUATING KRILL FISHERY HARVEST STRATEGIES THAT WILL MINIMISE RISK OF LOCALISED IMPACTS ON KRILL PREDATORS
-structured harvest strategies for krill, has been implemented within the EPOC modelling framework. It also ... includes the methods used for implementing environmental variability, the krill population, generic ... predators, the krill fishery and the system for setting catch limits. The process of implementing FOOSA in ... different dynamics that may be present in the krill-predator-fishery system in Area 48. Some of these ...
Meeting Document : WG-SAM-08/15 : Auteur(s): A. Constable (Australia)
-, nano-, and micro-size fractions) during commercial krill operations in the waters north of the South ... Shetland Islands from late December, 1991 to mid-February, 1992. The proportion of green krill had ... the importance of micro- and nano-size phytoplanktons in terms of food source for the Antarctic krill ... krill, the indicator of micro- and nano-size phytoplankton availability to krill Approval: Approved ...
Meeting Document : WG-EMM-98/29 : Auteur(s): S. Kawaguchi, T. Ichii and M. Naganobu (Japan)
Results of scientific observation in Antarctic krill fishery in 2010/11: II. analysis of variability of krill size and fish by-catch
Abstract: We examined spatio-temporal variability of krill body length and number of bycatch fish ... krill length and number of bycatch fish were analyzed by using a hierarchical Bayesian model composed of ... krill length model, some parameters did not converge well in the bycatch fish model. The interaction ... between month and sub-areahas large effects on krill length. Krill length varies among cruises, but there ...
Meeting Document : WG-EMM-12/67 : Auteur(s): T. Okuda and M. Kiyota (Japan)
Intra-annual variability in the abundance of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ krill density estimates
abundance of Antarctic krill continuously between 14 October 2002 and 29 December 2005. A distinct seasonal ... pattern in krill abundance was detected that recurred consistently over all 3 years. Krill densities in ... explained 71% of the observed week-week variation. Mooring estimates of krill abundance were not ... statistically different (P>0.05) from estimates derived from standard ship-based krill surveys in adjacent ...
Meeting Document : WG-EMM-06/25 : Auteur(s): R.A. Saunders, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein, D.G. Bone and A.S. Brierley (United Kingdom)
CONDITIONING SMOM USING THE AGREED CALENDAR OF OBSERVED CHANGES IN PREDATOR AND KRILL ABUNDANCE: A FURTHER STEP IN THE DEVELOPMENT OF A MANAGEMENT PROCEDURE FOR KRILL FISHERIES IN AREA 48
Abstract: The updated version of the Spatial Multi-species Operating Model (SMOM) of krill ... , one with the time series of krill abundance fixed on input, and the other incorporating an explicit ... model of krill dynamics. Additional versions of SMOM that may need to be conditioned are discussed. In ... suggest that penguins respond sooner than other predators to decreasing levels of krill abundance. Given ...
Meeting Document : WG-EMM-08/44 : Auteur(s): É.E. Plagányi and D.S. Butterworth (South Africa)
Linking acoustic scattering coefficient to krill fishery data: feasibility of estimating krill abundance using fishing survey
Abstract: Antarctic krill (Euphausia superba Dana) is a key species in the Southern Ocean ... between the acoustic scattering coefficient of krill swarms and catch, catch per unit effort (CPUE), catch ... per unit fishing area (CPUA) were studied for better understanding the feasibility of assessing krill ... higher than average catch of night trawls. The average thickness of krill swarm in the daytime was ...
Meeting Document : WG-EMM-17/44 : Auteur(s): T. Wang, G.P. Zhu, J.F. Tong and L.X. Xu
Uncertainty in reported geographical distribution and weight of krill catches from Norwegian krill fishing vessels operating continuous fishing systems
time krill enters the trawl mouth and the time the same krill enters the holding tanks where catch ... estimate variability in the conversion from krill holding tank volumes to krill biomass indicated that a ... reported catch time and actual catch time since the krill catch is kept in holding tanks before being ... measurements. We could then estimate a maximum residence time before the accumulated krill catch is recorded on ...
Meeting Document : WG-EMM-18/22 : Auteur(s): G. Skaret, T. Knutsen, F. Grebstad and O.A. Bergstad