Deployment of the MESSOR towed vehicle, which combines broadband acoustical, optical and environmental sensors. Photo: IMR.

New publication: Material resistance to shear deformation is characterized by shear viscosity

Monday 08 Nov 21

Results from the MEESO project has been published in ICES Journal of Marine Science.

Material resistance to shear deformation is characterized by shear viscosity. Fish flesh shear viscosity affects the backscattered amplitude around the resonance frequencies of swimbladdered fish and using incorrect values biases the estimates obtained from TS around the resonance.

There is limited information about shear viscosity of fish flesh, especially for mesopelagic species. In this study, flesh shear viscosity of mesopelagic fish is estimated from in-situ broadband backscattering measurement by inversion of viscous-elastic backscattering model. A relation between flesh shear viscosity, swimbladder size, and elongation is given. 


Mesopelagic flesh shear viscosity estimation from in situ broadband backscattering measurements by a viscous–elastic model inversion 
Babak Khodabandeloo, Mette Dalgaard Agersted, Thor A Klevjer, Geir Pedersen and Webjørn Melle
ICES Journal of Marine Science
DOI: 10.1093/icesjms/fsab183
Link to the article


Head of MEESO work package 2 
Thor Klevjer, Institute of Marine Research, Norway
3 JULY 2022