Individual niche trajectories in nesting green turtles on Rocas Atoll, Brazil: an isotopic tool to assess diet shifts over time

Abstract In this study, multi-tissue (yolk and carapace) stable isotope analysis was used to assess individual isotopic niche trajectories of nesting green turtles on Rocas Atoll, off northeastern Brazil, reveal a diet shift in the temporal dimension. The were highly directional, with stronger component towards decreasing values ?15N from carapace yolk. When are their foraging sites (temporal window measured by yolk samples), they more herbivores. Conversely, broader window, demonstrate carnivore-omnivore strategy, such as represented heavier carapace. This finding confirms shift. is first study that applies trophic for sea turtles, adding new tool understand ecology these migrant animals.