Summer stress blamed for catfish kill on Shell Rock River - KWWL - Eastern Iowa Breaking News, Weather, Closings

Summer stress blamed for catfish kill on Shell Rock River


The Iowa Department of Natural Resources says summer stress is to blame for killing catfish in the Shell Rock River.

The DNR says on Monday they investigated reports of dead catfish in the Shell Rock River from the Marble Rock Impoundment in Floyd County to above Clarksville in Butler County.

"The live channel catfish we found in the area showed signs of stress which means the fish kill is likely on-going and may have been occurring since last week," said Theresa Shay, fisheries technician with the Iowa DNR, in a written statement.

Shay added that investigators found live fish of other species in the same areas that looked to be in good condition.

"It would appear that this is a natural kill caused by several weeks of extremely hot water temperatures, little rainfall, a moderate green algae bloom and low flow conditions on the river and is only affecting channel catfish with the majority of dead fish in the 9-13 inch range," Shay said in a written statement.

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