May have been answered by this comment from Mr. Harper:
>I have a cabin on a lake in southeastern Ontario which
>contains Lake Trout, Lake Herring, Northern Pike, Walleyes, Largemouth bass,
>Smallmouth Bass, Yellow Perch, Bullheads, Rock Bass, Bluegill Sunfish,
Many if not most are direct competitors for resources (space, food), and
such competitive interactions are "natural elements". None of those are
native to the western US. There aren't many freshwater piscivores in the
west-- no catfish, sunfish or percids-- and the ones that are (pikeminnow,
dolly varden) are present in low numbers as adults in the streams that
salmon fry live in.
-- Jay DeLong Olympia, WA /----------------------------------------------------------------------------- /"Unless stated otherwise, comments made on this list do not necessarily / reflect the beliefs or goals of the North American Native Fishes / Association" / This is the discussion list of the North American Native Fishes Association / nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word / subscribe, unsubscribe, or help in the body (not subject) of an email to / nanfa-request_at_aquaria.net. For a digest version, send the command to / nanfa-digest-request_at_aquaria.net instead. / For more information about NANFA, visit our web page, http://www.nanfa.org </x-flowed>