Temperature Affecting Gender

[ginia_leanne]

I recently read in a book that alligator eggs incubated at higher temperatures are males, and eggs incubated at lower temperatures are females, does this work with other reptiles also? such as turtles or snakes?

[daisy]

I know that this is true of most turtles. I posed the same question last year sometime about cornsnakes. I believe the answer was 'no not really'.
Here is a link to that thread FYI:
http://www.cornsnakes.com/forums/showthread.php?t=19371

[Hurley]

I have had clutches all over the board in gender ratios when incubated at the same temps (80-82 degrees). I've had everything from all male to all female clutches at those temps, but on average I get a 1:1 ratio.

One year I had eggs incubate at much cooler temps (in the 70s). They took forever to hatch, as would be expected, and the genders were pretty even at those temps as well.

I don't incubate higher than 82 degrees if I can help it (although there are temp spikes up to 85 for brief periods). I feel that kinking and poor-doing hatchlings are much more prevalent at higher temps, so I can't help much on if TDSD (temperature dependant sex determination) occurs at higher temps. Obviously at higher temps, the eggs hatch much sooner, on average, but I haven't heard of anyone getting much of a difference in sex ratios.