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Natura Croatica : Periodicum Musei Historiae Naturalis Croatici, Vol. 17 No. 1, 2008.

Short communication, Note

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

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Abstract

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«).

Keywords

Tree Sparrow; Passer montanus; clutch size; repeatability; north-western Croatia

Hrčak ID:

28937

URI

https://hrcak.srce.hr/28937

Publication date:

31.3.2008.

Article data in other languages: croatian

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