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Notre Dame research reveals migrating Great Lakes salmon carry contaminants upstream
Date:12/6/2012

ver had measurable levels of contaminants. There's no other way for the contaminants to get there but the salmon. Water doesn't flow uphill."

The conclusion?

Although salmon are an economic benefit to the Great Lakes and perform important ecological functions (such as controlling the population of alewives), we need to consider the impact of salmon on streams where they spawn.

"If we want to remove a dam on a river and that will allow salmon to move upstream we need to realize that the salmon will carry pollutants with them and disperse them into the food web," Lamberti says.

"In sensitive areas with a lot of native fish, we might want to prevent salmon from moving upstream. And in the Great Lakes, maybe we should consider restoring the native populations of lake trout and whitefish rather than encouraging more salmon."


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Contact: Gary Lamberti
lamberti.1@nd.edu
University of Notre Dame
Source:Eurekalert

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