Actually one the most important thing is to protect their habitat, because as I've heard these turtles once they are born and go out to the sea, no matter how long they swim across or stay in the sea they will always come back to the exact place where they were born to lay their eggs (still a mystery how exactly they do this)!!!!
Anyway... all these areas where they lay eggs must be identified and protected... Sri Lanka is very lucky to have these kind of Bio-Diversity actually!!! Amazing creature!!