Adult leatherbacks feed mainly on jellyfish and other soft-bodied species (9). They are exceptional amongst reptiles because they are partly able to maintain an elevated body temperature via thermal inertia and a specially organized blood supply system in their shoulders (10). These features allow leatherback turtles to travel to cold waters and to dive to depths greater than 1,000 meters in search of prey (11). To nest, females emerge at night on nesting beaches to lay their eggs. Using their rear flippers they excavate deep 'boot shaped' nests into which roughly 100 eggs are laid. Around 20 percent of the eggs in each nest are small and yolkless (2). Individuals return to nest every few years, but within one season a female can lay four to ten clutches of eggs (2). The sex of the hatchlings is influenced by incubation temperatures: hotter nests produce all females; cooler nests produce all males (12).
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