While aromatase activity remains low for much of development in individuals that exhibit TSD, during the thermosensitive period, variations in temperature increase the activity of aromatase. Functional Ecology. One remarkable finding is that the injection of an aromatase inhibitor into the eggs of an all-female parthenogenetic species of lizards causes the formation of males Wibbels and Crews The consequences of TSD on fitness, or reproductive success, are largely unknown.
Journal of Animal Ecology. It is assumed that the function of dmy in the male embryo during the sex-determining period is to control the proliferation of primordial germ cells [ 39 ]. The gsdf Y gene is located downstream to dmy in O.
Molecular cloning and mRNA expression pattern of Sox9 during sex reversal in orange-spotted grouper Epinephelus coioides Aquaculture. It is the most popular and most studied type of environmental sex determination ESD. Fisher, R. Physiological and Biochemical Zoology.
In the s, David Crews, a biologist at the University of Texas at Austinand colleagues found that some environmental pollutants caused sex-altering effects in turtles and other reptiles. In birds and reptiles, estrogen is essential for ovarian development. Current research suggests that warming trends due to climate change may result in more female turtles being born!
Scientific Data. Zoological Science.
Retrieved April 16, — via ETI. Clear Turn Off Turn On. Between these extremes, males predominate.