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Photo 7 - Dr. Perry sieving benthic grab

This image above shows Dr. Matthew C. Perry sieving benthic material, as he undertakes a survey on the Restigouche River, New Brunswick, Canada.

This image above shows Dr. Matthew C. Perry sieving benthic material, as he undertakes a survey on the Restigouche River, New Brunswick, Canada.
Photo Credit: Dr. Glenn Olsen, USGS - Patuxent Wildlife Research Center 2004
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