Literaturdatenbank
Literaturdatenbank |
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Girondot, M., Hassine, B. S., Sellos, C., Godfrey, M., & Guillon, J. .-M. (2010). Modeling thermal influence on animal growth and sex determination in reptiles: being closer to the target gives new views. Sexual development : genetics, molecular biology, evolution, endocrinology, embryology, and pathology of sex determination and differentiation, (epub. ahead of print).
Added by: Sarina Wunderlich (28 Feb 2010 12:07:16 UTC) |
| Resource type: Journal Article BibTeX citation key: Girondot2010 View all bibliographic details  |
Categories: General Keywords: Echsen = saurians, Panzerechsen = crocodilia, Schildkröten = turtles + tortoises, Zeitigung = incubation Creators: Girondot, Godfrey, Guillon, Hassine, Sellos Collection: Sexual development : genetics, molecular biology, evolution, endocrinology, embryology, and pathology of sex determination and differentiation |
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| Abstract |
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Many species of oviparous reptiles, including crocodilians, a majority of turtles, some lizards and the 2 closely related species of Sphenodon have been shown to display temperature-dependent sex determination (TSD). Whereas it has been demonstrated very early that TSD also occurs in natural conditions, the relationship between a time series of changing temperatures and sex ratio remains a challenging problem for reptiles. We describe how a physiological model of embryo growth, gonadal development and aromatase activity can produce outputs that mimic well TSD. We provide an enhancement of a previously published model taking into account direct effect of temperature on aromatase activity. The comparison between the original model and the new one suggests that aromatase expression is controlled by a repressor factor expressed at masculinizing temperatures rather than its enhancement at feminizing temperatures.
Added by: Sarina Wunderlich |