Natura Croatica, Vol. 11 No. 4, 2002.
Izvorni znanstveni članak
Breeding characteristics of the barn swallow (Hirundo rustica) in NW Croatia
Z. Dolenec
Sažetak
The research was carried out in the village of Mokrice (46°00'N, 15°55'E) in NW Croatia during 1998–1999. Egg length averaged 19.16 mm, egg breadth 13.72 mm, egg volume 1840.8 mm3, egg shape index 1.40 and egg weight 1.81 g (during both years). The nests were situated at a height of 1.5–4.5 m above ground (mean = 2.5 m). I found 2–7 eggs per nest, on average 4.56 eggs. A statistically significant positive correlation was found between mean egg volume and egg breadth, as well as length, egg length and egg shape index, egg length and egg breadth; whereas a statistically significant negative correlation was observed between egg breadth and egg shape index. The laying order did not affect egg dimensions (length, breadth, volume, shape index, all p>0.05). The %D-value is 2.31.
Ključne riječi
barn swallow; Hirundo rustica; position of nest; egg characteristics; laying order; NW Croatia
Hrčak ID:
13446
URI
Datum izdavanja:
31.12.2002.
Posjeta: 2.374 *