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Re: only male fry

To: <apisto@v2.listbox.com>
Subject: Re: only male fry
From: António Vitor <antonio.vitor@sapo.pt>
Date: Wed, 3 Dec 2003 20:25:00 -0000
List-software: listbox.com v2.0
I said anti-breeding genes, when what I was trying to say was
anti-inbreeding genes...

Of course anti-breeding genes make no sense...
:)

Only the less inbreed animals could turn into females, so there are no
chances of defected animals to occur on those tiny places.

This is a clever way to potect all the gene diversity...
:)

Regards!
António Vitor

----- Original Message -----
From: "António Vitor" <antonio.vitor@sapo.pt>
To: <apisto@v2.listbox.com>
Sent: Wednesday, December 03, 2003 8:15 PM
Subject: Re: only male fry


> hops sorry folks!
> I thought that I was only replying to Nuno prazeres, so it was in
> portuguese...sorry about my mistake...
> :(
>
> I was saying that there could  be some anti-breeding genes that could turn
> active when too much equal copies of some genes are detected, it make
sense
> in the evolutionary view.
>
> if some apistos evolved in tiny places, inbreeding could make more non
> viable fish, so a gene that could prevent this and make more viable fish
> make sense...
>
> what you think about this?
>
> Sorry about my english...
> Regards!
> António Vitor
>
>
> ----- Original Message -----
> From: "António Vitor" <antonio.vitor@sapo.pt>
> To: <apisto@v2.listbox.com>
> Sent: Wednesday, December 03, 2003 8:06 PM
> Subject: Re: only male fry
>
>
> > andei a pensar...
> > e se existirem genes anti inbreeding?
> >
> > como o inbreeding é mau para a espécie pode haver genes que detectem
> quando
> > há muitas cópias iguais de genes.
> >
> > Geralmente o inbreeding gera animais defeituosos, um gene que podesse
> > previnir isto faz sentido a nivel evolucionário, já que se os apistos se
> > reproduzirem em ambientes fechados e pequenos (charcos), pode ser útil
um
> > gene deste tipo (mais alevins viáveis).
> >
> > que achas?
> > se for uma ideia estúpida não mando para a lista...
> > :)
> >
> >
> > ----- Original Message -----
> > From: "Nuno Prazeres" <nprazeres@vodafone.pt>
> > To: <apisto@v2.listbox.com>
> > Sent: Wednesday, December 03, 2003 7:36 PM
> > Subject: Re: only male fry
> >
> >
> > I read somewhere (maybe Romer) that very selected lineages tend to
produce
> > skewed sex ratios and temp and pH become less of an issue in those
> > particular cases. If your friend's apistos are a result of intense
> selective
> > breeding this might explain the fact.
> >
> > In my humble opinion your friend should try to spawn the apistos at 25C
> and
> > then during larval period lower one degree per day until it gets down to
> 22.
> > It might be helpful to move pH up a bit if it is too low. After about
600
> > hours over the birthtime temp can go up again because sex is formed. I
am
> > basing this on reading material and not experience. Generaly the higher
> the
> > tem the more males you get. Is some species the same happens with pH but
> to
> > a lower extent aand the lower the pH is the more males you get. Since
sex
> is
> > formed in teh first weeks and not determined at spawn time spawning
> > temperature can be confortably the very same.
> >
> >
> > Sorry for my mispell about m and micro Siemens. 1 milli = 1000 micro :-)
> >
> >
> >
> >
> > -----Mensagem original-----
> > De: owner-apisto@v2.listbox.com em nome de Dániel Gergely Faragó
> > Enviada: qua 03-12-2003 18:31
> > Para: apisto@v2.listbox.com
> > Cc:
> > Assunto: Re: only male fry
> >
> > Hi,
> >
> > Thanks for the answers. Though I am getting a bit confused. As live in
> > Europe TDS is not a common thing to measure. But we have gH and kH. So
> could
> > you tell me if there is a correlation between dH and gH. Now I have a
> total
> > hardness about 6-7° gH.
> >
> > Second, if I get it right the rules Mike wrote do not apply as the
water's
> > getting harder. So 7 microsiemens do not equal 7° dH (and 7° gH I
> suppose).
> >
> > And last, if the temperature is kept under 26 C, what can be the cause
of
> > having no females in the fry? (I ask this quite theoratically, as my
> friend
> > keeps telling me that temperatures couldn't rise higher than 26 C, but
> > egglaying happened in summer, and it is not easy to cool the water.)
> >
> > Thanks again
> >
> > Daniel Faragó
> > ----- Original Message -----
> > From: Mike & Diane Wise <apistowise@bewellnet.com>
> > Date: Wed, 03 Dec 2003 09:53:41 -0700
> > To: apisto@v2.listbox.com
> > Subject: Re: only male fry
> >
> > > Of course you are correct, Lee.  That is why I wrote, "At low levels
of
> > > total dissolved solids, 1 ppm TDS "roughly" equals an electrical
> > > conductivity of 1µS (microsiemen)." For almost all intended purposes
in
> > > the soft water end of the hobby they can be considered equivalent. If
> > > you look at common inexpensive aquarium conductivity meters there is
no
> > > difference in range between those measuring ppm TDS and µS/cm. They
are
> > > the same instrument reading the same values. It probably would have
been
> > > more accurate to say that 1µS roughly equals 1ºdH.
> > >
> > > Mike Wise
> > >
> > > LeeH920226@aol.com wrote:
> > >
> > > >In a message dated 12/2/03 11:32:56 AM, apistowise@bewellnet.com
> writes:
> > > >
> > > ><< TW I think there was a typographical error in the answer you
> received
> > > >
> > > >about ppm. At low levels of total dissolved solids, 1 ppm TDS roughly
> > > >
> > > >equals an electrical conductivity of 1µS (microsiemen). 1 mS
> > > >
> > > >(millisiemen), or 1000 µS, roughly equals 1000 ppm. It is not an
> unusual
> > > >
> > > >mistake on emails. Many do not know how to type a micron symbol (µ)
&
> > > >
> > > >mistakenly use an "m" instead. The use of an "m", of course,
represents
> > > >
> > > >"milli" in metric units. >>
> > > >
> > > >No, the TDS in ppm does not equal the conductivity in
microsiemens/cm.
> > The
> > > >relationship is variable depending on the exact composition of the
> > dissolved
> > > >ions. It ranges from 1.5 to 2.0 /1 Conductance/TDS. Most common water
> > supplies
> > > >are at a 1.7/1.0 ratio.
> > > >
> > > >Lee Harper
> > > >Media, PA
> > > >
> > >
>-----------------------------------------------------------------------
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> > > >
> > > >
> > > >
> > >
> > >
> >
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>
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References:
- Re: only male fry
  - From: "Nuno Prazeres" <nprazeres@vodafone.pt>
- Re: only male fry
  - From: António Vitor <antonio.vitor@sapo.pt>
- Re: only male fry
  - From: António Vitor <antonio.vitor@sapo.pt>
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