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Background Predation by the black rat (Rattus rattus) is threatening the world’s largest population of Mediterranean Shearwaters (Puffinus yelkouan) – 9 991 to 13 424 pairs out of a global population of 15 337 to 30 519 pairs. On Tavolara, Shearwaters can only successfully reproduce at a reduced number of nests, located in caves in rat-free high cliff ...
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