The sex of baby turtles is defined by eggs incubation temperature. Above a certain temperature, hatchlings will be female. Below, they will be males.
This « pivot » temperature is observed at around 28.5°C for green turtles. The hatchlings in the lower part of the nest where temperature is cooler, will therefore more frequently be males and the emerging turtles located in the upper warmer part of the nest will mostly be females.
𝘞𝘩𝘢𝘵 𝘤𝘰𝘶𝘭𝘥 𝘣𝘦 𝘵𝘩𝘦 𝘪𝘮𝘱𝘢𝘤𝘵 𝘰𝘧 𝘨𝘭𝘰𝘣𝘢𝘭 𝘸𝘢𝘳𝘮𝘪𝘯𝘨?
A warmer temperature would result in a disproportion of the male/female ratio with a dominance of females.
In Polynesia, this phenomenon has not yet been proven. However, in some countries the results are alarming!
A study conducted in Australia on Raine Island by Dr. Camryn Allen, demonstrated a ratio of 116 females to 1 male in a population of adult green turtles.