Intraseasonal variation of clutch size in female tree sparrow Passer montanus (CROSBI ID 143917)
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Podaci o odgovornosti
Dolenec, Zdravko
engleski
Intraseasonal variation of clutch size in female tree sparrow Passer montanus
In 2005 the variation of clutch size of the 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 (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 qulity").
tree sparrow; Passer montanus; clutch size; repeatability; north-western Croatia
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