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Impact of density‐dependent nest destruction on emergence success of Guianan leatherback turtles (Dermochelys coriacea)

To assess the impact of nest covering on a leatherback turtle Dermochelys coriacea nesting beach in French Guiana, we used field study data and a modelling approach. Field results showed that the covering of a pre‐existing nest by a new one causes the destruction of the older nest under some conditions of time and covering area, and almost always causes the destruction of the new nest. We then used field results to parameterize a theoretical model of the nesting beach. This allowed us to obtain a ‘critical carrying capacity for the beach’: the number of nests deposited for which the number of successful nests is maximum; when this number increases, the number of successful nests decreases. With these results, we then concluded that density‐dependent nest destruction plays a role in the functioning of the nesting beach. These results are essential for our understanding of nest‐site selection at the scale of the beach and its consequences.