In the cooler southern areas of the Great Barrier Reef, the number of female green turtles ranged between 65 and 69 per cent
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Canberra: A new study on Tuesday claimed that the green sea turtles in Australia's Great Barrier Reef might become extinct due to warmer ocean temperatures. Conducted by the National Oceanic and Atmospheric Administration (NOAA) in the US along with Australian scientists from the Department of Environment and Heritage Protection, the study found that male green turtles were rapidly declining for around two decades, reports Xinhua news agency.
In the cooler southern areas of the Great Barrier Reef, the number of female green turtles ranged between 65 and 69 per cent.
While in the warmer northern tip of the Reef, female green turtles accounted for a staggering 87 to 99.8 per cent of the population.
"Considering that sea turtle sex is dependent upon the temperature at which the egg incubates and considering that warmer temperatures produce more female hatchlings, we're concerned climate change might be causing this effect," biological marine researcher at the NOAA, Camryn Allen.
"The pivotal temperature for sea turtle populations where they produce 50 per cent male and 50 per cent female is about 29 degrees Celsius."
"Any variation on that of about one to two degrees, could risk producing all females or perhaps embryonic death."
Average temperatures on the Great Barrier Reef have far exceeded that pivotal temperature, according to Allen.
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