Kivonat:

Egg laying date, egg volumes, hatching weight and guarding females in tending periods were recorded for Lapwing (Yanellus vanellus L.), Redshank (Tringa totanus L.) and Black-tailed Godwit (Gimosa limosa L.) breeding on meadows in Kiskunsagi National Park, 50 km south of Budapest ( 19° 07' E; 47° 08' N). The meadows were flooded artificially in autumn but no water management or agricultural activities were carried out during the period of the breeding season. Longest time interval and greatest nest distance between first and replacement clutches was 17 days and 94 m for Lapwing, 17 days and 85 m for Redshank and 20 days and 120 m for Godwit. Egg sizes were smaller in replacement clutches than in first clutches. Positive correlation was found between the egg volumes, hatching weight and chick survival.