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Spread into Great Lakes through Welland Canal 1835 (Lake Ontario); 1921 (Lake Erie)
Out of the 5 lampreys only 1 is a invasive species, the sea lamprey. also only 2 of the 4 native lampreys are paracitic. The sea lamprey is also paracitic.
The Sea Lamprey
This graph shows the population efect on the Lake Trout with the sea lampreys.
The 4 native species coexest with the fish but the paracitic sea lamprey made the odds uneven
Petromyzon marinus
