Category Archive: Invasive Species

Aug 21

A “ruffe” road ahead for the Great Lakes

An aggressive little fish is threatening to disturb ecosystems throughout the Great Lakes. The Eurasian Ruffe is recognizable by its long spiny dorsal fin and frowning mouth. It’s native to Northern Europe and Asia, and made its first appearance in Lake Superior in the 1980s, probably after catching a ride on a freighter from Europe. …

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Permanent link to this article: http://www.currentcast.org/creature-features/a-ruffe-road-ahead-for-the-great-lakes/

Aug 16

Some big fish to fry in midwestern rivers

Bighead and silver carp can grow up to four feet long and gobble up food that native fish rely on. These invasive fish are in the Mississippi, Missouri, and Illinois rivers. And if they get into the Great Lakes, they could do enormous damage. John Dettmers, of the Great Lakes Fishery Commission, says one strategy …

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Permanent link to this article: http://www.currentcast.org/sustainable-fisheries/5040/

Jul 29

Lake trout stocking

A fishy tale: In the 1800s, lake trout were abundant in Lake Superior. Then, in the early to mid 1900s… Hansen: “… populations began to decline rapidly.” That’s biologist Michael Hansen. He says overfishing and predatory invaders known as sea lampreys were to blame. By the time an effective way to control lampreys was discovered, …

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Permanent link to this article: http://www.currentcast.org/water-and-energy/lake-trout-stocking/

Jul 26

A Super Highway for Aquatic Invaders

The system of locks and canals that allowed ships to bypass Niagara Falls suddenly created a path for invasive species. Tune in to this highway of info: When locks and canals began allowing ocean-going vessels to by-pass Niagara Falls, they did more than open new trade routes to the west. Suddenly… Campbell: “Things like sea …

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Permanent link to this article: http://www.currentcast.org/industrial-and-corporate-water-use/a-super-highway-for-aquatic-invaders/

Jul 16

Ciscoes: A Great Snack for Great Lakes Fish

A middle-of-the-food-web fish: Ciscoes were once abundant in the Great Lakes. But these native fish were depleted by overfishing, invasive species, and pollution. Ellen George, a grad student in the Cornell Department of Natural Resources, wants to see them come back. She says some of the invasive fish that replaced ciscoes in the food chain …

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Permanent link to this article: http://www.currentcast.org/sustainable-fisheries/ciscoes-a-great-snack-for-great-lakes-fish/

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