Artikel-Suche

Szabolcs Nagy, Tom Langendoen, Teresa M. Frost, Gitte Høj Jensen, Nele Markones, Johan H. Mooij, Jean-Yves Paquet, Marie Suet

Verbesserte Schätzungen der Populationsgrösse von überwinternden Wasservögeln.

2022

119

348–361

Key words
(von 1994 bis 2006 vergeben)

Bestandsentwicklung, Wasservogelzählung, Bestandsschätzung, Populationstrend

Schlagwort_Vogelart
(wissenschaftlich)

Cygnus olor, Tadorna tadorna, Aythya ferina, Spatula clypeata, Mareca strepera, Mareca penelope, Anas platyrhynchos, Anas crecca, Tachybaptus ruficollis, Podiceps cristatus, Fulica atra, Phalacrocorax carbo, Haematopus ostralegus, Recurvirostra avosetta, Pluvialis squatarola, Numenius arquata, Numenius arquata, Limosa lapponica, Limosa limosa, Arenaria interpres, Calidris canutus, Calidris alba, Calidris alpina, Tringa totanus

Schlagwort_Vogelart
(deutsch)

Enten, Schwäne, Taucher, Blässhuhn, Kormoran

Europa

englisch

Abhandlung

Towards improved population size estimates for wintering waterbirds. – Wintering population size estimates of waterbirds are often based on simply adding up the counts from the International Waterbird Census. This approach implicitly assumes that the whole population has been censused, which is an invalid assumption for many species. Consequently, the population sizes of wintering waterbird populations both at national and flyway levels are underestimated. This has serious implications for population trend analyses, population status assessments, and for management of huntable species. To illustrate how different approaches are used in different EU Member States, we compared the estimates reported to the European Commission under Article 12 of the Birds Directive with the IWC national totals from the same countries and from the same years. To stimulate the use of more reliable population size estimates, we provide a review of the existing methods and make some recommendations for their use in Europe.