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Quagga mussels blamed for whitefish declines in Great Lakes

A tub of commercially-caught lake whitefish, a rarity these days on the Great Lakes due to the presence of quagga mussels, is shown. Whitefish populations in some areas of the Great Lakes are in peril, according to recent research. (Photo courtesy Michigan Sea Grant)

The bi-national Great Lakes Fisheries Commission (GLFC) was formed in 1955 to eradicate the invasive sea lamprey and to provide guidance for Great Lakes fisheries management.
According to the GLFC, lake whitefish populations have declined as much as 80% in the Great Lakes since the late 1990s. This family of fishes have historically been decimated by overfishing, pollution, dead zones, habitat degradation, and invasive fish, including sea lamprey (parasitism), rainbow smelt (predation and competition) and alewife (competition).

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