A study shows that the temperature of the incubation environment could influence the sexualization of the gonads (reproductive organs) in sea turtles earlier than what is currently recognized. Researchers developed a new way to integrate the effect of thermal fluctuations on embryonic sex determination and predict sex ratios with much better accuracy than prior models. By measuring the strength of masculinization or feminization of temperatures using novel parameters, they have uncovered how temperature-sensitive sex determination works. These findings could be similar for other reptiles with temperature-dependent sex determination because similar molecular determinants and enzymatic mechanisms are at play.
Scientists have developed a new minimally invasive technique that greatly enhances the ability to measure neonate turtle sex ratios. This is the first time that differences in sex-specific protein expression patterns have been identified in blood samples of hatchlings with temperature-dependent sex determination. The technique is a crucial step in assessing the impact of climate change on imperiled turtle species and will enable more accurate estimates of hatchling sex ratios at a population level and on a global scale.
Men are more prone to competitive risk taking and violent behavior, so what happens when the number of men is greater than the number of women in a population? According to research by Florida State University Professor of Psychology Jon Maner, the answers might not be what you expect.