Steffen
> Von: Jeffrey Fullerton <tcmajorr_at_westol.com>
> Antworten an: nanfa_at_aquaria.net
> Datum: Tue, 16 Sep 2003 00:51:17 -0400
> An: "nanfa_at_aquaria.net" <nanfa at aquaria.net>
> Betreff: Re: NANFA-- Bluenose shiner news
>
> Good Evening everyone.
>
> My own two cents regarding sensitive or difficult species.
> The Pteranotropis are really neat species. I'm trying to get Sailfin
> Shiners to establish in my greenhouse pond. So far none of the luck like
> I had with the Coastal Shiners that bred in there last season. I'm
> guessing I got them maybe a bit late in the year and they were already
> spawned out. Hopefully they will spawn next year after wintering over.
> If not- it will be a toss-up between retrying or maybe going for a
> different theme. Maybe try some hardy Mexican livebearers that can
> handle 50 degree water in the winter- if such fishes exist.
>
> Back to the issue of keeping species that are considered rare but not
> officially protected by law. If a species is easy to propagate there is
> no reason why we should not encourage someone with dedication to keep
> and breed it. Most fish species are very prolific because females often
> release hundreds of eggs in a single spawning. Just a small group can
> give rise to a huge population in a very short time.
>
> However, when a species is difficult to maintain and the wild population
> is small enough to merrit concern for the future well being- the risk
> may outweigh the benefits of captive breeding. Then again maybe not.
> Succeeding with a difficult species may just be a matter of finding out
> what the optimum husbandry requirements are. If a breakthrough can be
> achieved- it could help save the species in the future. Better for the
> pospects of success and the viability of the wild population that such
> experimentation take place before the numbers are down so far that it
> would jeopardize the population even if a few specimens were removed for
> a breeding project.
>
> Rather than threatening sanctions against people who keep Bluenose
> Shiners- maybe we ought to offer recommendation that only those who are
> seriously interested in captive breeding as opposed to someone who just
> wants a few unusual fish to add flash to a community tank - attempt
> them. As others have said- there are plenty of other fish that are much
> better suited for that purpose.
>
> If I had my druthers- I'd rather go with the Bluehead Shiners- they look
> much prettier and might even be a little sturdier than welaka- though
> I've heard they are somewhat difficult to breed also.
>
> My own personal suggestion- maybe a colony tank or pond approach might
> work. Put the fish into the most spacious and naturalistic setups as
> possible and let nature take it's course. It works with alot of other
> species. A small pond might work the best since it gives plenty of room
> and also exposure to a natural seasonal cycle which might help condition
> them better.
>
> Jeff
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/-----------------------------------------------------------------------------
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/ reflect the beliefs or goals of the North American Native Fishes
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/ For more information about NANFA, visit our web page, http://www.nanfa.org