In many animal mating systems, one male can successfully produce offspring with many females. In red deer for example, a single male fights off other males to gain mating access to a harem of females, at the exclusion of other males. Females can only get pregnant once a year, yet males can get many females pregnant during the rut. It seems as if the population could grow much faster if many more females were produced than males.
Our expectation from sex ratio theory is that the primary sex ratio should be 50:50.
Since turtles have temperature-dependent sex determination, rapidly changing climates can skew the sex ratio. And turtles have been around for a very long time (turtles were around when dinosaurs were around), and have survived through many climate changes in the past. There are several mechanisms by which turtles could adapt to changing climates, but I study how mom's nesting decisions may have played a role in adaptation to local climate.