| Titre : | The experimental reintroduction of Ospreys Pandion haliaetus from Scotland to England |
| Auteurs : | Roy Dennis, Auteur ; Helen Dixon, Auteur |
| Type de document : | Article |
| Dans : | Vogelwelt (Die) (122(3-4) 2001) |
| Article en page(s) : | 147-154 |
| Résumé : | The Osprey has been absent as a breeding species in England for about 150 years but birds occur regularly on migration. The Scottish population has increased from one pair in the 1950s to at least 130 pairs in 1998. It has been subject to an intensive programme of conservation, management and research. In 1996, an experimental project was started to reintroduce Ospreys to England. A detailed project appraisal was undertaken before the necessary government licences were approved. Eight young from Scotland were translocated in 1996 and 1997, and twelve in 1998 to Rutland water Nature Reserve, a very large man-made reservoir in central England. In order to minimise effects on the wild population, attempts were made in 1996 to take 'runt chicks' which were likely to die but this was not very successful because of problems associated with salmonella infections. Out of eight young, six were released from specially built release cages on towers and four of them migrated. In the following two years, a total of 20 young were translocated and successfully released. Chicks were kept in captivity in broods of three and fed fresh fish in secluded cages over-looking the lake. After release young birds were fed at artificial nest platforms, to mimic food supply by adult male Ospreys, for over a month and all young set off on migration in a manner similar to wild birds in Scotland. Two of the young have subsequently been recovered dead in West Africa, one in Senegal in February and the other in Guinea in August, and one was observed on migration 200 km due south of the release site. The project team have refined the techniques of Osprey translocation and intend to release 12 young in 1999 and 2000, by which time it is hoped the first birds will have returned to breed. |
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