Sex-determination system - Wikipedia
Yolk steroid hormones and sex determination in …
"Our study demonstrates how moisture may change the incubation conditions inside nests by changing the temperature experienced by eggs, which affects development, growth and sex ratios," said Wyneken. "Furthermore, results of our study highlight the importance of including moisture conditions when predicting embryo growth and sex ratios and in developing proxies of embryonic development. Improving accuracy is particularly important when trying to assess the impact of climate change in species with temperature-dependent sex determination and other forms of environmental determination."
Alligator Gender Determined By Egg Temperature
Media release: A University of Canberra-led research collaboration has discovered the key to how temperature affects sex determination in reptiles.
their sex determined by the temperature of ..
Wow! Thanks for writing this up. This is a topic I’ve been wanting to do research on myself! I’ve known about temperature dependent sex determination for a while – but the additional detail on how it works makes it so much clearer!
99% of Australian Green Sea Turtles Studied Turning …
Unlike humans, turtles and other reptiles like crocodiles who lay their eggs do not have sex chromosomes. In sea turtles, sex is determined by the nest's environment: warmer temperatures produce females and cooler temperatures produce males.
Green sea turtles are turning all-female due to climate change
Re 2: There are many ways in which sea turtles will be affected by climate change. Probably two of the most significant are the potential change in sex ratio and the reduction of nesting habitat.
– The sex of a hatchling turtle is determined by the temperature at which it incubates. Eggs incubating at cooler temperatures turn into male turtles. Eggs incubating at warmer temperatures turn into female turtles. The change in the sex ratio of the nests caused by warmer temperatures can skew the population and lead to population decline.
– With climate change and overall global warming comes the melting of the polar ice caps and resulting sea level rise. Because so much of our coast line is developed and the beaches can’t move back to accommodate the rising oceans, beach habitat will decline. It will become harder and harder for sea turtle females to find suitable beaches on which to build a nest and lay their eggs. More nests will be in danger of washing out. Fewer successful nests leads to fewer turtles and population decline.