pl23_fish7977.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23fish7977jpgDescription
A converted ferryboat is used in the Potomac River by the Virginia Institute ofMarine Science to test the efficiency of a midwater trawl in catching alewivesas they migrate upstream to spawn.
Credit
NOAA Central Library Historical Fisheries Collection; P. 108 of Our Changing Fisheries 1970 Centenary NMFS centenary volume
Location
Virginia, Potomac River
Collection
Historic Fisheries