LOS BARRILES, MEXICO — This is how you nurture a budding conservationist: Put an hours-old turtle in a 4-year-old girl’s little hand just before it and dozens of its littermates are released to sea. On a quiet stretch of beach on the northern edge of Los Barriles, a fishing village of 1,100 people on the Sea of Cortez in Baja California Sur, Victoria Rivero — the little girl — her father, friends and others were gathered early one October morning for a seasonal ritual: the release of a clutch of newly hatched olive ridley sea turtles. From under her floppy pink hat, Rivero’s eyes grew large as she watched conservationist Omar Araiza Fiol open a plastic bag filled with round turtle eggs that had been dug up the night before. He held one egg up for all to see.