That's the fear of scientists who have been studying turtle-hatching patterns on the USA's East Coast, where the world's biggest population of loggerheads reproduces.
The sex of a turtle is affected by the temperature at which an egg incubates. Recent studies established that, in warmer conditions now prevailing on beaches in Florida, 90 per cent of hatchlings were female. This could increase even further as things get hotter.
Further north, in North Carolina, gender proportion was more even. But it is thought that this could change as temperatures rise.
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