In certain reptiles with temperature-dependent sex determination TSD , estrogens act as a signal for female differentiation. Because aromatase produces estrogens from androgens, this enzyme plays a pivotal role in TSD. Whether androgens act as the signal for male differentiation in TSD species in not yet clear. We manipulated the hormonal environment in eggs of the common snapping turtle Chelydra serpentina to determine the effects of an estrogen estradiol beta , an aromatase inhibitor fadrozole; CGS A , and androgens testosterone and dihydrotestosterone on sex determination in this TSD species.
Turtles, Temperature & Sex
Sexing wild snapping turtles - Sand & Silt - Turtle Forum
I am I so jealous of you, I recently had the pleasure of catching a small snapper near Farmville Virginia last September, sure was an angry little thing. This is a great read thank you very very much. Dave UK. I see snappers every once in a while while out birding. I have often wondered how you could tell what sex it is.
Scientists know that temperature determines sex in certain reptiles—alligators, lizards, turtles, and possibly dinosaurs. In many turtles, warm temperatures during incubation, create females; cold temperatures, males. This is one hypothesis that explains dinosaur extinction: a meteor hit, cooling the Earth, producing an all-male population. The reason ancient reptiles like turtles and alligators survived, the hypothesis goes, is that the water regulated drastic temperature changes during incubation. She pursued graduate degrees studying red-eared slider turtles in Indiana and Alabama.
I saw 27 wild snapping turtles on my latest trip to a canal area and just wondered what the sex ratio was. I assume males have much larger tails but when you don't have one to compare it to I'm at a loss. I know how Seriously, I would think that the cloacal opening is farther down the tail on a male. When I see adult snappers on the road, I assume they are females looking for a nesting site.