The following paper became available on-line in /Deep Sea Research I/: Inter-basin movements of Mediterranean sperm whales provide insight into their population structure and conservation *A. Frantzis, S. Airoldi, G. Notarbartolo-di-Sciara, C. Johnson and S. Mazzariol* /Deep-Sea Research I /58 (2011) 454--459. doi:10.1016/j.dsr.2011.02.005 *Abstract: *The sperm whale is one of the very few deep diving mammal species in the Mediterranean Sea. Following a rare mass stranding of male sperm whales in the Adriatic Sea in December 2009, photoidentification methods were used in order to investigate previous sightings of the stranded whales in the region. Fluke photos of the stranded whales were compared with those of 153 and 128 free-ranging individuals photographed in the western and eastern Mediterranean basins, respectively. Three out of the seven stranded whales had been previously photo-identified and some of them more than once. To reach the stranding place, two of these re-identified whales performed long-range inter-basin movements of about 1600--2100 km (in a straight line) either through the Strait of Sicily or the Strait of Messina. In addition, comparisons among all whales photographed in the two Mediterranean basins revealed that one more individual first photographed in the western basin (1991) was re-identified 13 years later in the eastern basin (2004). These three cases provide the first conclusive evidence of interbasin movement of sperm whales in the Mediterranean Sea. Inter-basin gene flow is important for the survival of the small and endangered Mediterranean sperm whale population. Mitigating the disturbance created by human activities in the straits area is crucial for its conservation. © 2011 Elsevier Ltd. All rights reserved. For those having access to Deep Sea Research I the link for full paper download is: http://dx.doi.org/10.1016/j.dsr.2011.02.005 Otherwise please contact me for a copy at:afrantzis@otenet.gr <mailto:ana.pinela@gmail.com> Best wishes (and hope to see some of you in Cadiz), Alexandros <mailto:anapinela@ub.edu> -- ___________________________________________ Dr. Alexandros Frantzis Scientific director Pelagos Cetacean Research Institute Terpsichoris 21 16671 Vouliagmeni, GREECE Tel.: +30-210-8960108 e-mail: afrantzis@otenet.gr website: http://www.pelagosinstitute.gr ___________________________________________