Growing up in Wisconsin the Northern Pike was a frequent flyer on the lakes I fished. I can imagine that they would really take hold if given half a chance. Like the walleye did in the Columbia. Lots of fun and very easy to catch (unlike Tiger Muskies). But I do understand the concern - they reproduce like crazy and are quite hardy.
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Mike, Editor
www.washingtonlakes.com "Featuring readers lake and saltwater reports."