La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	[Population trend of the Osprey Pandion haliaetus in Germany in the late 20th century]
Auteurs :	Daniel Schmidt, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (122(3-4) 2001)
Article en page(s) :	117-128
Résumé :	The nesting population of the Osprey in Germany was investigated in the years 1988-1998 by an inquiry to the co-ordinators for the monitoring of birds of prey in the federal states of Germany. Due to minor gaps in the provided data sets, population size in a few areas had to be estimated for the years 1989-1991. Data from different federal states were not always consistent, so results have to be regarded as preliminary. The population of nesting Ospreys increased from 147 to 346 pairs with an average of 77% successful pairs. The number of young in the years 1992-1998 grew from 356 to 608 with an average of 1.7 (range: 1.6-1.8) young per pair with eggs and an average of 2.18+-0.04 young per pair with young. Along with the population growth the abundance of nesting pairs increased in the core areas, gaps in the breeding range were filled and a westward and southward range expansion took place. In 1988,

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