Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/4984
Title: Nonrandom pattern of vigilance by preening black-headed gulls
Authors: Novčić, I. 
Vidović, Z.
Hauber, M. E.
Keywords: Chroicocephalus ridibundus;Poisson process;Antipredator behaviour;Scanning
Issue Date: 11-May-2022
Rank: M22
Publisher: Brill
Journal: Behaviour
Volume: 159
Issue: 12
Start page: 1101
End page: 1114
Abstract: 
Classic models of vigilance assume instantaneous and sequential randomness in the scanning process, implying negative exponential distribution of interscan durations and no interdependence among successive interscans. We examined whether vigilance pattern by preening black-headed gulls, Chroicocephalus ridibundus, meets these assumptions. Out of 54 behavioural sequences, 50 departed from the expected negative exponential distribution, whereas the focal interscan duration was significantly affected by the interaction of the preceding scan and the interscan interval. These results reveal departures from randomness in the scanning process by gulls, which may be a consequence of the hunting strategies of their predators or due to the trade-off between the needs for feather maintenance and antipredator vigilance.
URI: https://biore.bio.bg.ac.rs/handle/123456789/4984
ISSN: 0005-7959
DOI: 10.1163/1568539X-bja10167
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