Huge sea turtles coming back from brink of extinction
Washington — Sea turtles are lumbering back from the brink of extinction, a new study says.
Scientists found more populations of the large turtles improving than declining when they looked at nearly 60 regions across the globe. That’s a big change from a decade or two ago, experts said.
Long-living sea turtles have been pushed to endangered levels by hunting, accidentally being caught in fishing nets, habitat loss, plastics pollution and climate change, experts say.
But massive efforts to save the egg-laying turtles by changing fishing nets and creating protected and darkened beaches are working, said study lead author Antonios Mazaris, an ecology professor at Aristotle University of Thessaloniki in Greece.
The research was published Wednesday in the journal Science Advances.
There are seven different species of sea turtles, all but one endangered. The slow creatures live for several decades with some species weighing about 100 pounds and others well over 1,000 pounds.
Mazaris pointed to Hawaiian green sea turtles, once in trouble 40 years ago, as story of success. Maybe too much success.
“They have more turtles than they know what to do with,” said Roderic Mast, a sea turtle advisory group co-chairman at the International Union for Conservation of Nature, which determines the global list of endangered species.
Mazaris and colleagues looked at 299 sets of turtle populations over different lengths of time around the globe, finding 95 of them increased, while 35 went down. The rest didn’t change or there wasn’t enough data.
There were increases in North and South America on the Atlantic coast but setbacks in the Asia Pacific region.
Mast pointed to Kemp’s ridley sea turtles as a good example of what’s happening, especially in the United States. In the 1940s, there about 40,000 of them, mostly in the southern U.S. and Mexico. By the 70s, there were only 1,200 left.
The U.S. and Mexican governments changed laws, fishing practices and set aside dark, quiet areas for turtles to nest. That population is increasing by about 10 to 15 percent annually, Mast said.
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