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Originally Posted by foshizzle11
well I have heard that some eastern Europeans released the Prussian Carp in Alberta/Canada because they liked fishing for those fish back home. Not sure that is malicious but it could and is likely very bad for the fisheries here.
And Troutman is right, those were all introduced to Alberta as well. What makes it ok to do it? Who decides what is invasive or not?
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Well specifically in the case of Brooks and Rainbows a piece of the issue is that they spawn at the same time as our native Cutthroats and Bulls. So that is how you end up with these hybridized fish like the Cut-bow. The major problem with that isn't that they don't seem like nice enough fish to catch, but there are genetic issues. The predominant concern is that these hybrids are almost always sterile, and cannot reproduce. So basically these hybrids die out, ending the genetic strain and leaving fewer fish down the road.