Applications scientifiques

Multifrequency echo sounder operation: Krill

The echograms below are a recording of a layer of krill using 18, 38, 780, 120 and 120 kHz. As opposed to the mackerel, the strongest echo from krill is obtained at 70 kHz. The frequency responses of mackerel and krill are clearly different and can be used to identify and discriminate these species.

Echogram examples:

Simrad EK60: Five frequencies on krill

 
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