I know we all had a good discussion on the effects of pH and/or calcium on
sex ratios in Rainbowfish fry some time back but a chance conversation
yesterday has raised another factor.
I was talking to Marque Crozman about Sea Turtle conservation and the fact
that rookery temperature determines sex ratios and that they have to ensure
a proper ratio of mainland to island rookeries to allow for this and he
volunteered the info that he felt that he had noticed the same phenomenon
with his fish i.e. all other factors were as equal as possible but a
change in temperature of some 4 C (I think) had reversed the sex ratios in
his fry from one particular species.
I wonder if any other listmember has had any experiences along these lines?
Bruce Hansen
ANGFA
email: bhansen at ozemail.com.au
Don't miss the ANGFA web pages at -
http://www.ozemail.com.au/~fisher/angfa.htm