Jackdaw (Coloeus monedula) Science Article 2
Variation in size and shape of the jackdaw (Corvus monedula) eggs was studiedon egg’s museum collection data from Bardejov region, NE Slovakia, from1961 to 1964. Mean clutch size was 4.14 1.29 (n = 125). Coecients of variationfor clutch means ranged from 1.67 (breadth) to 4.85 (volume). Meanrepeatability estimates were 0.54, 0.64, 0.60, 0.57 for length, breadth, volumeand elongation index, respectively. The results suggest, that in the studiedpopulation, one should expect relatively low or intermediate heritability ofegg dimensions.
Piotr Tryjanowski, Lechoslaw Kuczynski, Marcin Antczak, Maciej Skoracki & Martin Hromada, Biologia, Bratislava, 56/2: 213-217, 2001