Caviar, climate change and a Great Lakes fish 
By Sam Corden US Source: michigan radio 12/16/2016
Sam Corden
Credit: Peter Payette
Scientists have been worried about the herring population in Lake Superior recently. In fact, last year they warned it might collapse.

Lake Superior is the only one of the Great Lakes with a large population of this native fish.

This fall, new rules protecting herring took effect in Wisconsin and Minnesota and things appear more stable.

But there may still be a big problem lying beneath the surface
 

Lake herring are also called cisco. They thrive in Lake Superior like few other places in the world.

Seth Moore is a biologist for the Grand Portage Band of Chippewa Indians. He says that without cisco, the entire lake would suffer.

That’s because cisco is a keystone species.

“So all the other species of both prey and predators that are in that food web change around in their proportions of the lake and you may see very, very long lasting repercussions of the crash of a stock like that,” says Moore.

 
Lake Superior Herring, Lake Continue...

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