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grass carp

Grass carp
USGS

There are several federal agencies in charge of trying to control Asian carp, and they just came out with their latest report to Congress on how those efforts are going.

A grass carp.
Asian Carp Regional Coordinating Committee

Scientists say they've confirmed the discovery of grass carp eggs in a tributary of Lake Erie.

Grass carp are among four species of Asian carp that pose a threat to the Great Lakes. The most feared are silver and bighead carp, which eat plankton and could destabilize food chains. But grass carp are also a problem because they eat huge amounts of valuable plants.

The Great Lakes Fishery Commission says state, federal and university scientists analyzed eggs collected from the Sandusky River in Ohio earlier this summer.

They've now concluded they were grass carp eggs.

USGS

TRAVERSE CITY, Mich. (AP) - Scientists say grass carp have invaded three of the Great Lakes and pose a significant environmental risk. But they say there's still time to prevent them from becoming established.

Grass carp are among four Asian carp species threatening to reach the lakes, where they could upend ecological systems and compete with native fish for food.

A U.S.-Canadian assessment released Friday says grass carp have been found in Lakes Erie, Michigan and Ontario. At least some are reproducing, although most are believed to be sterile.