99% of These Sea Turtles Are Turning Female

A new scientific paper has warned the northern population, believed to be the largest in the world and consisting of more than 200,000 nesting females, could eventually drastically fall without males.

Any temperature over 30 degrees will produce all females. Cooler temperatures produce more males in sea turtles, while warmer temperatures produce more females.

Warming seas are turning male turtles into females, scientists have discovered. The warmer the eggs remain, the more are the chances of female hatchlings.

The study analyzed more than 400 turtles and was conducted by researchers from the U.S. National Oceanic and Atmospheric Administration, as well as the Queensland Department of Environment and Heritage Protection in Australia. Just a few degrees can tip a delicate natural balance. Using a combination of endocrinology and genetic tests, researchers identified the turtles' sex and nesting origin. In contrast, the southern region, where it is fairly colder, females accounted for only 65-69% of the population. Of the older adult-sized turtles analyzed, 86.8% were female, the study said.

They worked in an area where two different populations of green sea turtles (Chelonia mydas) forage, one from a warmer area and the other from a cooler area. Notwithstanding influencing sex result of the turtles, higher temperatures additionally increment death rate sums turtle posterity.

They say the artificial rain is going to cool the sand and shift the sex ratio towards an increase in males.

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Green sea turtles are considered endangered throughout much of the world, under siege from coastal debris, loss of habitat, fishing nets, and pollution, according to the International Union for Conservation of Nature.

For many reptiles, sex is determined not by chromosomes, but by the temperature at which their eggs are incubated.

"Australia must adopt ambitious climate change targets that will save the Reef and its unique creatures".

"These results suggest that increased sand temperatures affect the sex ratios of the (northern Great Barrier Reef) population such that virtually no male turtles are now being produced from these nesting beaches", the study said.

Warming temperatures are turning one of the world's largest sea turtle populations in Australia's Great Barrier Reef nearly entirely female, running the risk that the colony may not sustain itself in coming decades, a study has found. Sand temperatures determine the sex of turtle hatchlings, with warmer temperatures resulting in more females.

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