Re: [RML] praecox changing colors

Bruce Hansen (bhansen at ozemail.com.au)
Tue, 16 Feb 1999 07:32:22 +1000

Nape flashing or "nuptual stripe" flashing is common in rainbowfish but not
all species do it and although it is usually by males , some females exhibit
it too. There is an interesting article by Gunther Schmida using this as a
grouping characteristic in a reasonably recent issue of FOS as well as some
discussion on this list in the archives

Regards,
Bruce.

Bruce Hansen, A.N.G.F.A., Advancing Australian Aquatics.

Bruce Hansen, ANGFA, caring for our aquatic ecosystems.

Please visit us at http://www.ozemail.com.au/~fisher/angfa.htm

-----Original Message-----
From: Mel Robinson <mrobinsn at hillfirm.com>
To: rainbowfish at pcug.org.au <rainbowfish at pcug.org.au>
Date: Monday, 15 February 1999 23:42
Subject: Re: [RML] praecox changing colors

>This species and some other species of rainbowfish flash a bright color on
>their forehead and back as a signal to other fish. Its usually used a
>challenge for territory or mating rights, as far as I can tell. I found
>that each species flashes a different color, some are orange, some yellow
>and some red. Your right, they can turn it on and off very quickly.
>Mel Robinson
>
>-----Original Message-----
>From: H. Hoekstra <hugo at greed.nl>
>To: rainbowfish at pcug.org.au <rainbowfish at pcug.org.au>
>Date: Tuesday, February 09, 1999 9:56 PM
>Subject: [RML] praecox changing colors
>
>
>>Hello,
>>
>>I noticed my some of my praecox sometimes light a yellow stripe along
their
>>back. They can light this on and off quickly. Also I noticed that 2 or 3
>>of them engaged in somekind of fighting or mating ritual turned their
>>dorsal and anal fins from red to black. Only a small red edge remained.
>>Why do they do this and does this give any clues regarding their gender?
>>
>>Best regards,
>>
>>Hugo Hoekstra
>>
>>
>
>