RE: Aggies unfertilised spawn.

[Ken Laidlaw <kl@roe.ac.uk>]

Eggs initially being white does not definately indicate that they are
unfertilised.  Eggs can be produced in different colours from whitish to
bright red.  They should start to change colour as the embryos develop.  If
they are unfertilised they will remain white, fungus and be eaten by the
female.
Ken.

-----Original Message-----
From: Steph & Dave [mailto:caligula@tig.com.au]
Sent: Monday, January 31, 2000 10:34
To: Apisto Mailing List
Subject: Aggies unfertilised spawn.


I have just had a 'weird' occurance happen.  I have a pair of A.
agassizi in a breeding tank spawn (yeah finally !) however when I look
at the eggs tonight they are all white, which to me indicates that they
have not been fertilised.

The male is definately fertile, as he has successfully spawned with a
different female and I currently have 15 of his offspring in a growout
tank.  No chance of a mix up either as he is the only male I have.

Why would a female spawn and not let the male in to fertilise the eggs? 
Is there some other factor I havent considered?

Tank is a long and shallow 18 gallons (roughly) with a sponge filter,
some plants, pH 6.0, nitrates nil, carbonate hardness 35-40 ppm.

Thanks

Steph


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