3   Artículos

 
en línea
Per Lunde    
Finite-amplitude (nonlinear) sound propagation effects in seawater may cause measurement errors in fish and zooplankton abundance estimation and species identification for accessible echo sounder transmit electrical power levels and operating frequencies... ver más
Revista: Journal of Marine Science and Engineering    Formato: Electrónico

 
en línea
Per Lunde and Rolf J. Korneliussen    
Acoustic methods used in fish abundance estimation constitute a key part of the analytic assessment that makes the basis for abundance estimation of marine resources. The methods rely on power-budget equations and calibrated systems. Different formulatio... ver más
Revista: Journal of Marine Science and Engineering    Formato: Electrónico

 
en línea
Hideaki Tanoue, Teruhisa Komatsu, Alabsi Natheer, Isamu Mitani, Shinichi Watanabe, Yuuki Watanabe, Akira Hamano and Nobuyuki Miyazaki    
The body tilt angle of a fish has a large effect on the acoustic target strength. For an accurate estimation of fish abundance using acoustic methods, it is necessary to measure body tilt angles in free-ranging fish. We measured diurnal body tilt angle d... ver más
Revista: Journal of Marine Science and Engineering    Formato: Electrónico

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