But it is hard to make those special males. Unlike
where you breed a strain in captivity that can not
make certain enzymes. These once made you can breed
normally in captivity as long as you feed them with a
diet rich in the enzyme they are missing. Those
special male tilapia they make sell for $500 each. So
that option is out for a wide spread distribution.
Later, John
--- anutej-in-loxinfo.co.th wrote:
> At least one big company had tried making its own
> sterile big red
> strain of tilapia to use for their business [sortha
> like making the
> strain avaliable from their company only]. As said
> in Jurassic Park
> "Life will find a way" some fish won't become
> sterile and in a few
> years the company has to give up its monopoly.
>
> Tony
>
>
> "J. C." wrote:
> >
> > I think he was refering to a simular problem in
> > another type animal(I know they do this with fruit
> > flies). Some animals they sceintist have found a
> way
> > of making a animal so that they can breed but all
> the
> > offspring are infertile. I think it was done with
> > fruit flies. So dumping a few of these into a
> system
> > would reduce but not stop the production. I think
> it
> > has only been done with different type bugs
> though.
> >
> > Another way is a genetic problem that can be
> given to
> > lab fish sort of like what was talked about on
> jurasic
> > park movie. You make a GMO which can not make
> > necessary protiens/emzymes and then make sure you
> feed
> > the GMO food laced with this substance. When
> released
> > these breed with the population giving the
> population
> > a disease which is recessive in nature. You can
> wipe
> > out one forth of the population each gestation
> cycle.
> > You never totally get rid of the problem though. I
> > know they were looking into this type program to
> help
> > with cane toads in Australia-in-one time. But with
> > larger animals like frogs you can put tracers on
> them
> > and keep them fed/injected to keep them alive long
> > enough to do alot of damage. But with small fish
> they
> > would only last a week or so after you stop
> feeding
> > them. But I am sure the mosquito fish would be
> able to
> > be mass produced in the captive inviroment enough
> to
> > make a dent in the population of them. But with
> all
> > recessive traits it shows up in one of four of the
> F2s
> > but two of the four F2s would be carriers and one
> fish
> > out of the four would be double dominate for the
> good
> > gene which is why it can help drastically but not
> stop
> > the problem.
> >
> > Later, John
> >
> > --- EELReprah-in-aol.com wrote:
> >
> > > In a message dated 5/11/06 5:58:33 PM,
> > > nanfa-in-bakerweb.biz writes:
> > >
> > > << Would it work to release thousands of sterile
> > > gambusia into a system on
> > >
> > > order to halt the reproduction? >>
> > >
> > > How would that reduce the fertility of those
> already
> > > there?
> > >
> > > Lee Harper
> > > Media, PA
> > >
> >
>
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> >
> > John Cox of Cumberland Killifish
> > Honey Robber beekeeping and removal services
> >
> > Please join A Fishy World my new email group all
> > about fish at
> AFishyWorld-subscribe-in-yahoogroups.com
> > http://mail.yahoo.com
> >
>
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> Native Fishes
> / Association (NANFA). Comments made on this list do
> not necessarily
> / reflect the beliefs or goals of NANFA. For more
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> / visit http://www.nanfa.org Please make sure all
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>
John Cox of Cumberland Killifish
Honey Robber beekeeping and removal services
Please join A Fishy World my new email group all
about fish-in-AFishyWorld-subscribe-in-yahoogroups.com
http://mail.yahoo.com
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/ Association (NANFA). Comments made on this list do not necessarily
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/ visit http://www.nanfa.org Please make sure all posts to nanfa-l are
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