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Effects of oxygen concentration and clutch on sex determination and physiology in red-eared slider turtles (Trachemys scripta)

✍ Scribed by Etchberger, Cory R. ;Phillips, John B. ;Ewert, Michael A. ;Nelson, Craig E. ;Prange, Henry D.

Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 928 KB
Volume: 258
Category: Article
ISSN: 0022-104X
DOI: 10.1002/jez.1402580315

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✦ Synopsis

In many species of reptiles, sex is determined by the incubation temperature of the egg. In the red-eared slider turtle (Trachemys scripta), warm incubation temperatures produce females, cool ones produce males, and a narrow range of intermediate temperatures produces both sexes. The mechanism of sex determination has not been established. Some investigators have postulated that both total incubation time and developmental rate during the first third of development are better predictors of sex than is incubation temperature. Here we consider whether various oxygen concentrations might influence sex determination by altering total incubation time. We incubated T . scripta eggs at various oxygen concentrations, and found that while total incubation '84). Thus, oxygen might influence sex by affect-

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