Re: Sex change in Apistos???

[david <hipchack@yahoo.com>]

I've had this happen with my A. bitaeniata pair. After
the male passed away the female became a beautiful
male(?). I asked on this list what might be the cause
and it seemed that the general consensus was due to
old age. My bits were 2-3 years old. How old were your
fish? 

Also when I asked, dicrossus sp. were mentioned as
having the capability and possibily this trait is
common in apistos. 

but on the whole I dunno :).

david
--- Nuno Prazeres <nprazeres@vodafone.pt> wrote:
> Hi All,
> 
> somebody just shared with me the following:
> 
> after a few unsuccesful spawns of a A. cacatuoides
> couple (the fry was always eaten by cory cats) the
> male died. Sooner afterwards the female start
> growing and getting more colourful until a stage in
> which she looked just like her former mate.
> 
> Now, a new trio was just introduced in the tank and
> the new male just dominated the goup including the
> original fish. Giving behavioural issues we can get
> to the conclusion the original fish seemed to have
> turned into a sexual active male.
> 
> I suggested to take out the dominant fish to see if
> it would be possible to get a viable fertilized
> spawn from a coulple whose male was a spawning
> female a few months ago. That would be something!
> 
> Anyone had such an odd experience?
> 
> I read something like this about Dicrossus
> filamentosus and know apisto's sex is indeed
> influenced to a certain extent by external factors
> but thought that when the fish's sex is determined
> it would be for life. The external influence would
> be acting to drive the fish from a unsexed situation
> to a sexed one and that would be it.
> 
> What are the factors that might cause a fish's body
> to "decide" to change sex? If this case is indeed
> such a thing I would say social or ecological
> factors would apply just like what happens in the
> case of the D. filamentosus.
> 
> Take care all
> 
> Nuno Prazeres
> (Portugal)
> 
> 
>
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