𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Temperature-sensitive periods of sex determination in emydid turtles

✍ Scribed by Bull, J. J. ;Vogt, R. C.

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
551 KB
Volume
218
Category
Article
ISSN
0022-104X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

In many turtles sex differentiation is controlled by the incubation temperature of the embryo, with low temperatures producing males, high temperatures producing females. This study investigates the developmental period of temperature‐sensitivity in two species of emydid turtles, using different combinations of incubation at a male‐determining temperature (25°C) and at a female‐determining temperature (31°C). The sensitive period extends throughout much of the middle third of development. Sex is more readily influenced by 25° than by 31°, however, so that maleness can be determined much earlier in development than can femaleness. Comparison of these results with a previous study of snapping turtles indicates that the sensitive period occupies somewhat the same developmental interval in these different turtles. However, in snapping turtles, the female‐determining temperature used (30°) is more influential than the male‐determining temperature (26°), in contrast with these results from emydids.

📜 SIMILAR VOLUMES

Temperature-sensitive periods of sex det
Temperature-sensitive periods of sex determination in a lizard: Similarities with turtles and crocodilians
✍ Bull, J. J. 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 530 KB

The sex of leopard geckoes is determined by incubation temperature. This study identified their temperature-sensitive period of sex determination by incubating embryos at a male-producing temperature (32 "C) and a female-producing temperature (26 "C) for various intervals of development and comparin

Whole-body and plasma concentrations of
Whole-body and plasma concentrations of steroids in the turtle,Trachemys scripta, before, during, and after the temperature-sensitive period for sex determination
✍ White, Richard B. ;Thomas, Peter 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 893 KB

## Abstract To examine endogenous steroid levels during early sexual differentiation in a reptile, we measured whole‐body and plasma steroid concentrations in a turtle (__Trachemys scripta__) throughout embryogenesis using radioimmunoassays. Whole embryos contained testosterone, estradiol, progeste

Sex-determining potencies vary among fem
Sex-determining potencies vary among female incubation temperatures in a turtle
✍ Bull, J. J. ;Wibbels, T. ;Crews, D. 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 302 KB

## Abstract Reptiles whose sex is determined by incubation temperature typically exhibit all‐male or all‐female sex ratios over a wide range of incubation temperatures. The question arises as to whether the various all‐female temperatures (or the various all‐male temperatures) are equivalent in the

Temperature-dependent sex determination
Temperature-dependent sex determination in the red-eared slider turtle,Trachemys scripta
✍ Wibbels, Thane; Cowan, Jon; LeBoeuf, Robert 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 125 KB 👁 1 views

Temperature-dependent sex determination (TSD) in the red-eared slider turtle, Trachemys scripta, has been the subject of a variety of past studies. Incubation temperature appears to affect sex determination in a dose-dependent fashion. This suggests that temperature could be affecting a dosage-sensi

Synergism between temperature and estrad
Synergism between temperature and estradiol: A common pathway in turtle sex determination?
✍ Wibbels, Thane ;Bull, J. J. ;Crews, David 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 443 KB

## Abstract In many reptiles, the temperature at which the eggs are incubated determines the sex of the hatchlings. Administration of estradiol will counteract the masculinizing effects of a male‐producing temperature, resulting in female hatchlings. To address whether temperature and estrogen are