Knowledge about breeding success is relevant for understanding the trends observed in local and regional breeding populations of waders, terns and gulls. This report compiles results from surveys of breeding success of Oystercatchers and terns breeding on the island of Mandø, and of terns and gulls breeding on the island of Langli. Both islands are located in the Danish Wadden Sea. Oystercatchers were monitored in 2010 and 2011 and bred successfully in one of these. Common Terns and Artic Terns were studied on Mandø mainly in 2009-2011 and they bred with very poor success in all years. Successful breeding of Sandwich Terns was recorded on Langli in most of the years during 2006-2010. The Lesser Black-backed Gulls and Herring Gulls that nested on Langli were fairly successful in raising young to fledging during 2009-2013, whereas Common Gulls suffered from predation by Herring Gulls and they hardly raised any young. It is concluded that a future low cost monitoring programme of breeding success could focus on Oystercatchers on Mandø and Herring Gulls on Langli.
Originalsprog
Engelsk
Antal sider
84
ISBN (Elektronisk)
978-87-7156-153-1
Rekvirerende organ
Naturstyrelsen
Status
Udgivet - 2015
Serietitel
Technical Report from DCE – Danish Centre for Environment and Energy