Climate change could leave sea turtles without mates

Sea turtles might be facing an unusual problem: too many girls.

Unlike a human baby, whose X and Y chromosomes determine whether it will be born a boy or a girl, a sea turtle’s sex is defined during egg incubation periods. Warmer temperatures lead to a higher proportion of females while cooler conditions result in more males.

A new Florida Atlantic University study published by Endangered Species Research finds that conditions such as heavier rains and temperature shifts are impacting loggerhead sea turtle sex ratios, potentially influencing future reproduction rates for the species.

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