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As with many other reptiles, the sex of a marine turtle embryo is determined by the temperature of the nest in which the eggs incubate. Warmer sand temperatures (>29°C) produce mostly female hatchlings, whilst cooler temperatures produce predominately males (<29°C). Scientists are concerned that due to human induced climate change, there will be an increase in female hatchlings, known as feminisation, leading to a decline in overall population due to the lack of male production.