predetermaning sex of eggs

[exiled reptile]

does anyone know if temperature has any affect on the sex of brood like in crocodiles

[Nate]

No - Temp has no affect on the sex of the snake.

[exiled reptile]

thanx i was just wondering i really appreciate the quick response

[Nate]

no problem. Welcome to the forum

[BPelizabeth]

wow I never knew that temp affected the sex of crocs....that is interesting.

[crusher]

im pretty sure it is also thought that the temperature also affected the sex of dinosaurs...

[Mike Cavanaugh]

It also effects the sex of Leopard Geckos.

[jason79]

Some tortoises too I believe.

[WingedWolfPsion]

Temperature sex determination is present in crocodilians, turtles, and lizards. I'm not sure it's been found in any snakes yet.

As for dinosaurs, I think this is highly unlikely, as they were essentially birds, not reptiles, and as such, they most likely brooded their eggs, either warming them with their bodies, or with rotting vegetation the way Australian scrub fowl do. Their growth rates suggest they were warm-blooded, or semi-warm-blooded the way primitive mammals (such as hedgehogs) are.

Crocodilians may also control the temperature of their nest, but their growth rate is slower than that of the dinosaurs. Dinos have more in common with birds (including some feathers). It would be more accurate to say that birds are dinosaurs, and should be reclassified as such. (Class Dinosauria, not Class Aves).

[Matt K]

I think a lot of Ball breeders wish that Balls exhibited temperature dependent sex determination, haha. I suppose the variability keeps things interesting though, and adds another level of excitement. Getting males where you need them and females where you need them both by chance...well that equals pure satisfaction .

To the original poster--all snakes have sex chromosomes, and thus none of them rely on temperature dependent sex determination. Things like crocs and most turtles lack sex chromosomes, and thus it is the temperature of incubation that determines the sex. Not ALL reptiles that lack sex chromosomes display temperature dependent sex determination, but a bunch certainly do. It's very cool stuff, haha.

Cheers,
-Matt