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A converted ferryboat is used in the Potomac River by the Virginia Institute of Marine Science to test the efficiency of a midwater trawl in catching  Picture

A converted ferryboat is used in the Potomac River by the Virginia Institute of Marine Science to test the efficiency of a midwater trawl in catching

A converted ferryboat is used in the Potomac River by the Virginia Institute of Marine Science to test the efficiency of a midwater trawl in catching alewives as they migrate upstream to spawn.

Photo Location: Virginia, Potomac River

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Author: NOAA Central Library Historical Fisheries Collection; P. 108 of "Our Changing Fisheries" 1970 Centenary NMFS centenary volume/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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Added On
17th October 2015
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