More than 100,000 stocked fish such as bass and catfish are estimated to have died.
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Biologists scrambled Thursday to unravel the mystery behind a massive fish kill in a popular man-made lake in Nevada that draws thousands of anglers each winter for prized game fish such as trout.
More than 100,000 stocked fish such as bass and catfish are estimated to have died in the lake in the northern city of Sparks in recent weeks in an unprecedented die-off that has destroyed the entire fishery, said Chris Healy, spokesman for the state Department of Wildlife.
Testing of water at the Sparks Marina, a city recreation complex whose chief attraction is a 77-acre reservoir, has revealed that it is nearly devoid of oxygen necessary to support aquatic creatures such as fish, he said.