Bob
----- Original Message -----
From: "Christopher Scharpf" <ichthos_at_charm.net>
To: "NANFA Mailing List" <nanfa_at_aquaria.net>
Sent: Monday, May 28, 2001 12:05 AM
Subject: NANFA-- brown trout (was Spawning in high water...)
> Dan wrote:
>
> > I still beleive brown trout are not a problem in any way, shape, or
form.
>
> It's well-documented in the literature that brownies have reduced native
> salmonid populations -- especially brook trout -- through displacement,
food
> competition, and outright predation. I direct your attention to one study
in
> particular: Fausch & White, 1981, Competition between brook trout and
brown
> trout for positions in a Michigan stream, Canadian Journal of Fisheries
and
> Aquatic Sciences 38: 1220-1227. This study showed that brownies pushed out
> native brookies from the best habitats.
>
> In addition, brownies have been implicated in the decline of Dolly Varden,
> golden trout, and Modoc sucker in California, and the near-extinction of
> Lahontan cutthroat trout in Lake Tahoe.
>
> Comparatively speaking, brown trout are probably not as dangerous and
invasive
> as other exotics. In fact, they have failed to establish reproducing
populations
> in most areas into which they've been introduced. But to say that they are
a
> benign presence is a gross underestimate of their destructive record and
> potential. They clearly should not be sanctified.
>
> Chris Scharpf
> Baltimore
>
>
/---------------------------------------------------------------------------
-- > /"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
/----------------------------------------------------------------------------- /"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