Warming temperatures causing sea turtles to be born female

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Rising temperatures have caused a major downturn in male turtle populations in the northern Great Barrier Reef.

A new study, published in the journal Current Biology, has found that 99 percent of sea turtles in the Pacific Ocean biggest green sea turtle rookery are female. Researchers say this is due to warming global temperatures.

According to the National Oceanic and Atmospheric Administration, a sea turtle's sex is temperature dependent. Males are born at around 27.7 degrees centigrade, while females are born at around 31 degrees centigrade.

According to National Geographic, an area further south holds a ratio of 2 female to 1 males sea turtles. Worldwide is around 3 to 1, reports National Geographic, citing research looking at 75 rookeries worldwide.

RUNDOWN SHOWS:
1. Depiction of turtle and eggs
2. How sea turtles are born male or female
3. Overview of turtle populations

VOICEOVER (in English):

"New research has found that 99 percent of sea turtles in the Pacific Ocean's biggest green sea turtle rookery are female."

"Researchers suspect this is due to warming temperatures."

"A sea turtle's sex is temperature dependent."

"Males are born at around 27.7 degrees centigrade, while females are born at around 31 degrees centigrade."

"An area further south holds a ratio of two females to one male sea turtle."

"According to National Geographic, recent research looking at 75 rookeries from around the globe put the ratio at 3 to 1"

"If rising temperatures continue, male turtles may be wiped out."

SOURCES: NOAA, National Geographic
https://swfsc.noaa.gov/news.aspx?ParentMenuId=147&id=22881
https://oceanservice.noaa.gov/facts/temperature-dependent.html
https://news.nationalgeographic.com/2018/01/australia-green-sea-turtles-turning-female-climate-change-raine-island-sex-temperature/