Re: NANFA-- Pike could devastate fisheries (article)

Jay DeLong (
Sun, 02 Feb 2003 22:07:56 -0800

At 07:30 AM 1/31/2003 -0500, you wrote:
>Perhaps other species are more adept at eating their eggs/fry?

Also, esocids don't show parental care like centrarchids and
ictalurids. I've been thinking about fish-eating fish and why there aren't
many in western US and Canadian freshwater habitats. We have lots and lots
of birds here that eat fish-- herons, cormorants, mergansers, terns,
several species of kingfisher, eagles, and more-- but few fish that eat
fish. I wonder that this isn't partially because so much of the biomass in
streams is of anadromous fishes and their fry-- salmonids, osmerids,
clupeids mostly. So a fish-eating fish would have slim pickings during
portions of the year, and they'd have to chow on minnows and suckers and
sculpins and such. That's likely a limiting factor on the numbers of these
fish, which would be restricted to the immediate area, moreso than birds,
which can fly elsewhere for food.

I'm also wondering a few things about the threat of the northern pike in
Lake Davis:
Is it really a threat to the endangered salmonids or is it a threat to
lucrative fisheries there? California has been promoting fisheries on
intentionally introduced fishes like largemouth bass and striped bass as
long as I can remember. I wish someone could shed some light on that.

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
/ To subscribe, unsubscribe, or get help, send the word
/ subscribe, unsubscribe, or help in the body (not subject) of an email to
/ For a digest version, send the command to
/ instead.
/ For more information about NANFA, visit our web page,