Re: Re: [RML] Sex change in desert gobies

Bruce Hansen (bhansen at
Mon, 11 Aug 1997 08:02:41 +1000


We had a small interchange on the RML on this subject previously but in
answer to your question - I had a group of 6 or 7 with only one male that I
could detect and he regularly seemed to spawn with all the females. He died
and a few weeks later another male was evident ( not as well coloured or as
flat in the head) and a couple of weeks later he was spawning too with some
young appearing.

I am quite sure it wasn't a young male from the fry - but it could have
been a sub-dominant male. I have heard of other instances where this has
happened with DG's

While we are on this species - does anyone have any experiences to share on
the influences of pH, salinity, temperature etc on the sex ratios in the

bhansen at

> From: Harro Hieronimus <Harro.Hieronimus at>
> To: rainbowfish at
> Subject: RE: Re: [RML] Sexing desert gobies
> Date: Monday, 11 August 1997 5:00
> Bruce wrote:
> >DG's can change sex too - but I have only seen females change to males
> >not vice versa.
> Do you mean this biologically or just regarding colour? Have you ever had
a spawning female which later
> turned into a male with 100% guarantee?
> Harro