| water quality trends in the delaware river basin (usa) from 1980 to 2005. | in 1940, the tidal delaware river was "one of the most grossly polluted areas in the united states." during the 1950s, water quality was so poor along the river at philadelphia that zero oxygen levels prevented migration of american shad leading to near extirpation of the species. since then, water quality in the delaware basin has improved with implementation of the 1961 delaware river basin compact and 1970s federal clean water act amendments. at 15 gages along the delaware river and major tri ... | 2011 | 20665109 |
| new fish-killing alga in coastal delaware produces neurotoxins. | ten fish mortality events, involving primarily atlantic menhaden, occurred from early july through september 2000 in several bays and creeks in delaware, usa. two events involved large mortalities estimated at 1-2.5 million fish in bald eagle creek, rehoboth bay. samples from indian inlet (bethany beach), open to the atlantic, as well as from an enclosed area of massive fish kills at nearby bald eagle creek and torque canal were collected and sent to our laboratory for analysis. microscopic exam ... | 2002 | 12003749 |