Here's a relevant article from Science Daily. No surprises there, but I'm glad to know it's being studied on a global scale.
Freshwater Fish Invasions The Result of Human Activity

Freshwater Fish Invastions The Result of Human Activity
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Guest_schambers_*
, Feb 05 2008 01:58 PM
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Guest_schambers_*
Posted 05 February 2008 - 01:58 PM
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