Fossil Phalacrocorax aristotelis (Linnaeus, 1761) from beach of the isotopic substage 5e of Majorca (Balearic Islands, Western Mediterranean)

Abstract not availabl

Els ocells del Pleistocè superior de la Cova Nova (Capdepera, Mallorca). III.

Abstract not availabl

Rècord de longevitat per a virot (Calonectris diomedea diomedea)

Longevity record for Cory's Shearwater (Calonectris diomedea diomedea). An adult Cory's Shearwater of the Mediterranean subspecies Calonectris diomedea diomedea of more than 22 years of age has been controlled in the Cabrera National Park (Balearic Islands). This bird whas ringed as a pullus on 9th August 1974 on the islet of s'Estell Xapat (Cabrera). It was controlled on 20th August 1988 on the islet na Plana and again on 14th August 1996 on the same islet. The elapsed time beetwen the date of ringing and the second control was 8.041 days. This recovery is, without daubt, the maximum longevity known for this subspecies, reaching 22 years

Climate change drives migratory range shift via individual plasticity in shearwaters.

How individual animals respond to climate change is key to whether populations will persist or go extinct. Yet, few studies investigate how changes in individual behavior underpin these population-level phenomena. Shifts in the distributions of migratory animals can occur through adaptation in migratory behaviors, but there is little understanding of how selection and plasticity contribute to population range shift. Here, we use long-term geolocator tracking of Balearic shearwaters (Puffinus mauretanicus) to investigate how year-to-year changes in individual birds' migrations underpin a range shift in the post-breeding migration. We demonstrate a northward shift in the post-breeding range and show that this is brought about by individual plasticity in migratory destination, with individuals migrating further north in response to changes in sea-surface temperature. Furthermore, we find that when individuals migrate further, they return faster, perhaps minimizing delays in return to the breeding area. Birds apparently judge the increased distance that they will need to migrate via memory of the migration route, suggesting that spatial cognitive mechanisms may contribute to this plasticity and the resulting range shift. Our study exemplifies the role that individual behavior plays in populations' responses to environmental change and highlights some of the behavioral mechanisms that might be key to understanding and predicting species persistence in response to climate change