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The Yelkouan shearwater (Puffinus yelkouan) is a vulnerable species endemic to the Mediterranean Region, but there is little information of its ecology particularly when at sea. In this study, we assessed the habitat use by Yelkouan shearwater in the Black Sea during the breeding (March–July) and non-breeding (August–February) periods of 2013, using boat-based surveys and shore-based counts. We created...
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