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A 153kHz narrowband acoustic Doppler current profiler (ADCP) was used to measure volume backscattering strength (S v ) during a deepwater oceanographic survey of cetacean and seabird habitat in the northeastern Gulf of Mexico. S v was positively related to zooplankton and micronekton biomass (wet displacement volume) in 'sea-truth' net hauls made with a 1m 2 Multiple Opening-Closing...
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