Article: Prey fish dwindling in Lake Michigan; Population halved as invasive mussels rule

Water isn't the only thing disappearing from Lake Michigan.

The federal government's annual lakewide prey fish survey shows the volume of little fish that sustain big fish such as salmon and lake trout has dropped by half in just the last year. Meanwhile -- and perhaps not coincidentally -- the volume of invasive mussels has ballooned to levels that biologists never would have predicted even five years ago. Those mussels make their living on the plankton upon which the lake's fish species directly or indirectly depend.

The situation has scientists flummoxed and anglers fretting about the future of a fishery that helps sustain a multibillion-dollar Great Lakes fishing industry.

"We may not be ...

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