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lake herring

Caviar, climate change and a Great Lakes fish

Dec 6, 2016
Lake herring
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.

Rebecca Williams / Michigan Radio

Lake Superior is the largest freshwater lake in the world by surface area, and it has something the other Great Lakes don’t — stable populations of mostly native fish species.

But scientists say a key fish in Superior’s food web is now in trouble because of mild winters and an appetite for caviar in Europe.