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Birds of Indian Subcontinent

Kleptoparasitism during courtship in Sterna hirundo and its relationship with female reproductive performance

Publication Type:Journal Article
Year of Publication:2011
Authors:García, G, Becker, P, Favero, M
Journal:Journal of Ornithology
Volume:152
Issue:1
Date Published:2011
ISBN Number:2193-7192
Keywords:Hirundo, Laridae, Sterna, Sterna hirundo
Abstract:Kleptoparasitism is a well-known foraging tactic used opportunistically by many seabird species. However, little is known about this behaviour during the early stages of the breeding cycle and its effects on breeding performance. Here, we investigated the relationship between kleptoparasitism during the courtship period and female reproductive performance in Common Terns ( Sterna hirundo ). All identified kleptoparasites were males, and none of their mates performed such behaviour. We compared two groups of tern pairs, one where the males performed kleptoparasitism (kleptoparasitic group, n = 10), the other one where both mates were non-kleptoparasitic (honest group, n = 22). The body mass of kleptoparasitic females was between 8 and 15% higher than that of honest females. In kleptoparasitic females, the third egg was significantly bigger than in honest birds, and the egg-volume was not significantly different between the three eggs of the clutch in contrast to honest birds. We found no differences in the comparison among hatching success between both groups. The reproductive output, however, was significantly higher in the kleptoparasitic than in the honest group. Hence, we are providing the first evidence that kleptoparasitism during early stages of the breeding cycle has a strong link with egg size and reproductive output in Common Terns.
URL:http://dx.doi.org/10.1007/s10336-010-0554-4
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith