A new study has found the largest population of more than 200,000 nesting females off Australia's Queensland coast could drastically fall without males to reproduce with. The temperature which produces the flawless ratio of half females and half males serves as the "pivotal temperature" marker.
Unlike humans and most mammals, a green sea turtle's sex is determined by outside temperatures while they're still growing inside the egg.
"Finding that there are next to no males among young northern green turtles should ring alarm bells, but all is not lost for this important population".
Scientists said: 'Combining our results with temperature data show that the (warmer) northern GBR (Great Barrier Reef) green turtle rookeries have been producing primarily females for more than two decades and that the complete feminisation of this population is possible in the near future'.More news: President Oprah? Golden Globes speech sparks rumours of 2020 run
The new research paper was published in journal Current Biology, and it was conducted by the National Oceanic and Atmosphere Administration, California State University and Worldwide Fund for Nature Australia. They live around the Great Barrier Reef and in it. The warmer the eggs remain, the more are the chances of female hatchlings. A few up or down into the temperature can affect the natural balance of this species. The research includes the study of two genetically different population of turtles on the reef. Of the older adult-sized turtles analyzed, 86.8% were female, the study said. Notwithstanding influencing sex result of the turtles, higher temperatures additionally increment death rate sums turtle posterity.
Without males, green sea turtles, already endangered in parts of the world due to pollution, fishing nets and other variable, face deep jeopardy.
"Realizing what the sex proportions in the grown-up reproducing populace are today, and what they may look like five, 10 and quite a while from now when these youthful turtles grow up and move toward becoming grown-ups, will be extraordinarily profitable". While there was a moderate female sex bias of 65%-69% in turtles originating from the cooler nesting beaches in the south, turtles originating from warmer northern beaches were extremely female-biased. The species and ecosystems in the world more affected by Climate change. Sea turtle gender is dependent on the incubation temperature while a turtle is an embryo, a characteristic common in some reptiles.