The “dawn chorus” and incubation in the coot (Fulica atra L.)
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It has been proposed that both acoustic and non-acoustic factors could explain the dawn peak of territorial advertisement in birds. The coot is a territorial waterbird which does not use vocal advertisement either to attract mates or defend territory boundaries. In spite of the absence of acoustic factors affecting the time budgeting of advertisement, this species shows a dawn peak of display and aggressive behaviours. This trend occurs both in the presence and absence of non-territorial ‘prospecting’ birds, but the trends are quantitatively different in these two cases (Fig. 1). Males participate in display and fighting more often than females, probably because of their greater size and effectiveness in defence. This asymmetry in defence abilities governs the time budgeting of incubation, the male tending to take time off the nest when territorial defence is most necessary (Fig. 2).
KeywordsAggressive Behaviour Defend Time Budget Great Size Territorial Defence
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- Cramp S, Simmons KEL (1980) Handbook of the birds of Europe, the Middle East, and North Africa: the birds of the western palearctic, vol 2. Oxford University Press, LondonGoogle Scholar
- Dixon WJ (ed) (1981) BMDP statistical software 1981. University of California Press, Berkeley Los Angeles LondonGoogle Scholar
- Hinde R (1952) The behaviour of the Great Tit (Parus major) and other related species. Behaviour (Suppl) 1:1–201Google Scholar
- Henwood K, Fabrick A (1979) A quantitative analysis of the dawn chorus: temporal selection for communicatory optimization. Am Nat 114:260–274Google Scholar
- Kacelnik A (1979) The foraging efficiency of the Great Tit (Parus major L.) in relation to light intensity. Anim Behav 27:237–242Google Scholar
- Kacelnik A, Krebs JR (1983) The dawn chorus in the Great Tit (Parus major): proximate and ultimate causes. Behaviour 83:287–308Google Scholar
- Kirk RE (1968) Experimental design: proceedures for the behavioural sciences. Brooks/Cole, Belmont, CalifGoogle Scholar
- Kornowski G (1957) Beiträge zur Ethologie des Blesshuhns. J Ornithol 98:318–355Google Scholar
- Morton ES (1975) Ecological sources of selection on avian sounds. Am Nat 109:17–34Google Scholar
- Waser P, Waser MS (1977) Experimental studies of primate vocalization: specializations for long distance propagation. Z Tierpsychol 43:239–263Google Scholar