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Volume backscattering strength (Sv in dB re 1m−1) of ice krill (Euphausia crystallorophias) was observed at two frequencies (38 and 120kHz) with a calibrated split-beam echosounder system in the Amundsen Sea coastal polynya. The horizontal and vertical scattering layers in the upper 200m of the water column were known with the existence of predominant ice krill (>95%) in this region. Acoustic identification...
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