Re: [Killietalk] Commercial imports; what to label them?

["Keith Cook" <kcook at sdgdocs_com>]

John, 

>From a genetic standpoint, different locations may contain gene pools that
are "incompatible" with each other, and crossing them would be akin to
producing a hybrid much like a donkey even though the adult fish look very
much alike and are considered the same "species" (whatever that is).  

When you maintain a location in your tanks, the fish does not "evolve" and
develop a different set of genes.  You may lose some genetic variability
here and there, but there genes stay pretty much the same until your last
fish finally jumps out of the tank and dries up on the floor.  Once a
Misaje, always a Misaje.  Keeping them in your tanks for generations does no
more to change their gene pool than does cutting off your right ear changes
yours.  Even if you cut off right ears for generations, the genes stay the
same.  Again, you may lose some diversity over time as you bottleneck the
gene pool, but essentially you have the same fish.  You can recapture some
of this lost diversity, assuming there really is diversity to lose, by
introducing some fresh stock with the same location.  With locations, you
know a "Misaje" is compatible with another "Misaje" as they are essentially
genetically the same, whereas a "Misaje" crossed with an "N'Sukka" may
produce a donkey, so to speak, even though they are technically the same
species.  At least on this side of the pond these two fish are considered
the same species.

Whew.

Keith

-----Original Message-----
From: killietalk-bounces at aka_org [mailto:killietalk-bounces at aka_org] On
Behalf Of John Jabba
Sent: Thursday, August 02, 2007 8:39 PM
To: killietalk at aka_org
Subject: Re: [Killietalk] Commercial imports; what to label them?

David et al;
      Okay, there are other fish that have collection codes. I'll give you
that. But nobody has addressed one of my questions and the one I feel is
most important. Why should a given pair of killies kept and bred in a
hobbyists tank keep a collection code from a location that they are
extremely remote from in terms of generations of fish. They have bee bred
and have grown up in a far different biotope than the original pair of
imported fish.  For example, a pair out of your tanks, if a collection code
is given, should be DL01. Your initials and  sequence number. Actually from
things I have heard in the past some of the codes really weren't that valid
because the importers didn't like to advertise some of their collecting
sites. And in a lot of cases in this day and age the importers are not even
with the collectors and who knows if they are really giving a location or
just satisfying us with some numbers and letters...   

Maybe I have too much time on my hands and thinking too much. But I believe
these are valid points for discussion. we did get alopng for a lot of years
without collecting codes and it didn't seem to harm the hobby...

John J.
Date: Thu, 2 Aug 2007 11:33:40 -0700
From: "David Lains" 
Subject: Re: [Killietalk] Commercial imports; what to label them?
To: "'killifish discussion list'" 

Hi John

I would argue that many cichlids have locations and well not guppies but
species livebearers have both collection codes and locations.

It's true we'll likely never return fish to the wild but at least we can try
to maintain distinct populations.

Best Fishes
David  



 
       
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