La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Population growth and range expansion of the oystercatchers (Haematopus ostralegus) breeding in Italy
Auteurs :	Francesco Scarton, Auteur ; Roberto Valle, Auteur ; Renzo Rusticali, Auteur ; Paolo Utmar, Auteur ; Marcello Grussu, Auteur
Type de document :	Article
Dans :	Vogelwarte (39(3) Feb., 1998)
Article en page(s) :	190-196
Langues:	Allemand
Résumé :	Over the last 20 years the Oystercatchers Italian population, one of the largest along the Mediterranean coasts, has been rapidly growing up, from 20-30 pairs estimated at the beginning of the 1980s to 63 pairs censused in 1996. The year annual growth has been 7.2%, with a much higher growth (11.2%) in the very last years. The species has both increased in the traditional breeding sites (the Po Delta) and colonised new areas (Lagoon of Grado-Marano and Lagoon of Venice). Artificial sites, such as dredge spoil islands, has been rapidly occupied by breeding pairs. Among the possible causes of increase higher adult survival in the breeding grounds and provision of new sites are considered the most important.

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