| Titre : | Results of the conservation programme for Black Tern Chlidonias niger at Lake Dummer (Lower Saxony, Germany) from 1992-2004. |
| Auteurs : | Frank Koerner, Auteur ; Ulrike Marxmeier, Auteur |
| Type de document : | Article |
| Dans : | Vogelwelt (Die) (126(3) 2005) |
| Article en page(s) : | 227-234 |
| Résumé : | Between 1950 and 1980 the breeding population of the Black Tern at the hypertrophic shallow Lake Dummer decreased from almost 200-250 pairs to about 20-30 pairs. Tile main reason for this decline was the continuous decrease of proper nesting sites. Since 1987 breeding rafts have been offered and the population started to increase oil up to 102 pairs in 2004. The average Clutch size was 2.64 eggs and the mean rate of reproduction was 1.37 fledglings per pair. |



