04-12-2014, 11:34 PM
found this interesting. it's an older report, but there are a lot of good general facts...and gee, it comes from north Dakota.
[url "http://www.und.nodak.edu/org/ndwild/perch.html"]http://www.und.nodak.edu/org/ndwild/perch.html[/url]
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[url "http://www.und.nodak.edu/org/ndwild/perch.html"]http://www.und.nodak.edu/org/ndwild/perch.html[/url]
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