Functional Analysis of Mate-Feeding in the Lesser Kestrel Falco naumanni

Publication Type:	Journal Article
Year of Publication:	1992
Authors:	Donázar, JAntonio, NEGRO, JUANJOSÉ, Hiraldo, F
Journal:	Ornis Scandinavica
Volume:	23
Issue:	2
Date Published:	1992
ISBN Number:	00305693
Keywords:	Falco, Falco naumanni, Falco tinnunculus, Falconidae
Abstract:	Mate-feeding was studied at 13 nests in a colony of Lesser Kestrels Falco naumanni. Additionally, the seasonal variation in body mass of males and females was investigated throughout the breeding cycle. On average, mate-feedings (n = 783) began 54 d after the pair's first copulation and 16.5 d before the laying of the first egg, and lasted 23.7 d. Body mass of females increased from the beginning of the mate-feeding period and peaked at egg-laying. Males' body masses were less variable and tended to decrease from the mate-feeding period to the end of the breeding cycle. Our results suggest that mate-feeding is not relevant to pair formation, although it cannot be discounted that this behaviour may be important in tightening the pair-bond. The most evident function of mate-feeding in the Lesser Kestrel seems to be to increase the female's body mass, possibly to allow the laying of earlier and larger clutches. In fact, the start of the mate-feedings was correlated with laying date, and the earlier the laying, the larger the clutch.
URL:	http://www.jstor.org/stable/3676448
Short Title:	Ornis Scandinavica

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