Natura Croatica, Vol. 17 No. 1, 2008.
Kratko priopćenje
Intraseasonal variation of clutch size in female tree sparrows Passer montanus
Zdravko Dolenec
; Department of Zoology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
Sažetak
In 2005 the variation of clutch size of tree sparrows Passer montanus was investigated in the Mokrice rural area, north-western Croatia. Average clutch size of first clutches was 5.00 eggs (SD = 0.62), of the second 5.36 eggs (SD = 0.66) and of the third 4.86 eggs (SD = 0.71). Repeatability (r) of clutch size in first, second and third clutches (within-year) was significant (p = 0.005). This means that 33% of the variation in clutch size is due to intraindividual variation of genetic factors (intrinsic »female quality«).
Ključne riječi
Tree Sparrow; Passer montanus; clutch size; repeatability; north-western Croatia
Hrčak ID:
28937
URI
Datum izdavanja:
31.3.2008.
Posjeta: 1.352 *