Hi Jess. I got your email, and thought I had emailed you back, but I got a bounce message today.
Here's what I've been able to dig up:
There is at least one viviparous reptile species that has temperature dependent sex determination (Eublepharis macularius). There is also a species of viviparous skink (Niveoscincus microlepidotus)that is thought to be able to control the ratio of male to female offspring, but no one is really sure how this works. However, these skinks live in extremeley cold climates (they're called snow skinks for a reason) and the ability to allocate gender may be an adaptation to that, so unlikely to be found in tropical species.
In short, I guess I'm saying that I've found no data at all relating to gender allocation in PTS. Of course, these guys are very under-studied, so no surprise there.
I've also been looking into grant possibilities to get the zoogen work done. There are few granting organizations out there that will give money to an individual for work like this. A herp society or any organization with a board of directors and maybe even a 501(3)(C) status would be preferred.
If I get the time to write a grant myself (not likely) I might try to get my old employer (herp department in an AZA accredited zoo) to submit it to a granting agency in their name. Of course, if someone else wanted to do the writing, I would be amenable. Exams are coming up for me shortly and I'm as busy as a schizophrenic on a tilt-a-whirl.
-Z
