In Malaysia, warmer temperatures mean fewer male turtles, hurting conservation efforts

KUALA LUMPUR, Malaysia – On a secluded Malaysian beach, a group of volunteers carefully retrieved newly laid sea turtle eggs in the sand and moved them to a shady, cooler location, in response to fears by researchers that warmer weather is leading to fewer male hatchlings.

The temperature of the developing turtle eggs is what determines sex. Observers at the Chagar Hutang Turtle Sanctuary on Redang Island believe they are already seeing fewer males being hatched due to climate change – with the situation made worse this year by prolonged hot and dry spells caused by the El Niño weather phenomenon.

Animal, Reptile, Sea Life — TOGETHER. Hatchlings are placed in a container for nursing before being released into the South China Sea at a turtle conservation center on Redang Island, Malaysia, on May 22, 2024. Photo by Hasnoor Hussain/Reuters

Adult, Female, Person — CONSERVATION. A conservationist measures the length of a turtle after it laid eggs at the shore of the South China Sea at Redang Island, Malaysia, on May 22, 2024. Photo by Hasnoor Hussain/ Reuters

Nature, Outdoors, Water — TOURISM. Tourists swim with turtles at the South China Sea off Redang Island, Malaysia, on May 23, 2024. Photo by Hasnoor Hussain/Reuters

“Sea turtle conservationists were concerned that uncontrolled global warming in the future, in the next 15, 20, 30 years, will be detrimental…because it will feminize sea turtle hatchling populations,” Nicholas Tolen, a researcher at University of Malaysia Terengganu said.

Moving nests to shadier spots or irrigating them with water has been proven to help lower incubation temperatures, though the success of the sanctuary’s program was still being measured.

Such methods were also preferable to artificial incubators, which could disrupt sea turtle hatchlings’ understanding of the earth’s magnetic field, affecting their orientation and ability to nest, the researchers said. – Rappler.com

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