Sperm retention.

[SCI-MCC]

I'm starting this thread to try and get as many different peoples experiences
on sperm retention from one year to the next and not double clutching.
I know cornsnakes can hold sperm from one year to the next but under what
conditions? Has anyone ever had it happen when a corn was brumated,or
only when they have been cooled?

The reason I ask is we've bought a pair corns a few years back as het for
a higher end morph here in Ireland.The breeding should have give a 1 in 4 result this year from a 15 egg clutch but no recessive snakes were produced .At first I thought maybe we've got really bad odds and mother
nature just isn't on our side,so I phone the guy that sold them to us.
He seemed to strongly believe that corns can't hold sperm from one
year to the next,then has changed his mind and said they can't when brumated.
Would any one please post any info they have on this phenomenon to
help us shed a bit more light on the subject?Old threads you were involved in
or any of your experances would be much appreciated.