Abstract
In Wood WarblersPhylloscopus sibilatrix in South-Central Sweden, paired males spend considerable time trying to attract additional females either in outlying parts of their territory or in a secondary territory at some distance from the first. Approximately 20 % of the paired males succeed in attracting an additional female, while the rest stay monogamous. When the eggs hatch males assist in feeding the young. We studied parental care in monogamous pairs and investigated the proportion of males being paired in relation to the hatching of broods. Both feeding frequency and load size increased with age of the young. Feeding frequencies were higher in males than in females, while there was no difference in load size between the sexes. Nestlings are unable to thermoregulate the first days after hatching, and females spent considerable time brooding them. We also show that males do not gain by deserting the family when the broods hatch, since the probability to attract additional females at that time is low.
Zusammenfassung
In einer Population Südschwedens wendeten die Männchen des Waldlaubsängers erhebliche Zeit auf, um entweder in entfernten Teilen ihres Reviers oder in einem zweiten Revier in einiger Entfernung weitere Weibchen anzulocken. Etwa 20 % der Männchen konnte so ein zweites Weibchen an sich binden, die übrigen blieben monogam. Nach dem Schlüpfen halfen die Männchen bei der Jungenfütterung. Die Brutpflege bei monogamen Paaren wurde untersucht, ebenso das Verhältnis der verpaarten Männchen zu geschlüpften Bruten. Fütterfrequenz und Größe einer Futterportion nahmen mit dem Wachstum der Jungen zu. Bei den Männchen war die Fütterfrequenz höher als bei den Weibchen, nicht jedoch die Größe einer Futterportion. Da die Nestlinge während der ersten Tage ihre Körpertemperatur nicht aufrecht erhalten können, werden sie vom Weibchen ausdauernd gehudert. Männchen gewinnen nichts, wenn sie die Familie nach dem Schlüpfen der Jungen verlassen, da die Wahrscheinlichkeit, ein neues Weibchen zu finden, in dieser Zeit gering ist.
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Literature
Alatalo, R. V., K. Gottlander &A. Lundberg (1988): Conflict or cooperation between parents in feeding of nestlings in the pied flycatcher,Ficedula hypoleuca. Ornis Scand. 19: 31–34.
Aschenbrenner, L. (1966): Der Waldlaubsänger (Phylloscopus sibilatrix). N. Brehm-Büch. 386. Wittenberg Lutherstadt.
Best, L. B. (1977): Nestling biology of the field sparrow. Auk 94: 308–319.
Dunn, E. H. (1975): The timing of endothermy in the development of altricial birds. Condor 77: 288–298.
Howe, H. F. (1979): Evolutionary aspects of parental care in the common grackle (Quiscaluus quiscala L.). Evolution 33: 41–51.
Krebs, J. R., &N. B. Davies (1993): An introduction to behavioural ecology. Oxford.
Knapton, R. W. (1984): Parental feeding of nestling Nashville Warblers: The effect of food type, brood-size, nestling age and time of day. Wilson Bull. 96: 594–692.
Lack, D. (1968): Ecological adaptations for breeding in birds. London.
Leffelaar, D., &R. J. Robertson (1986): Equality of feeding roles and the maintenance of monogamy in tree swallows. Behav. Ecol. Sociobiol. 18: 199–206.
Maynard Smith, J. (1977): Parental investment: a prospective analysis. Anim. Behav. 25: 1–9.
Nur, N. (1984): Feeding frequencies of nestling blue tits (Parus caeruleus): costs, benefits and a model of optimal feeding frequency. Oecologia 65: 125–137.
O'Connor, R. J. (1975): The influence of brood size upon metabolic rate and body temperature in nestling blue titsParus caeruleus and house sparrowsPasser domesticus. J. Zool. Lond. 175: 391–403.
Ditto (1980): Energetics of reproduction in birds. Acta XVII Congr. Int. Ornithol.: 306–311.
Pinkowski, B. C. (1978): Feeding of nestling and fledgling Eastern Bluebirds. Wilson Bull. 90: 109–116.
Royama, T. (1966): Factors governing feeding rate, food requirement and brood size of nestling great tits (Parus major). Ibis 108: 313–346.
Seel, D. C. (1969): Food, feeding rates and body temperature in the nestling house sparrowPasser domesticus at Oxford. Ibis 111: 36–47.
Temrin, H. (1986): Singing behaviour in relation to polyterritorial polygyny in the Wood Warbler (Phylloscopus sibilatrix). Anim. Behav. 34: 146–152.
(1989): Female pairing options in polyterritorial Wood WarblersPhylloscopus sibilatrix: are females deceived? Anim. Behav. 37: 579–586.
&S. Stenius (1994): How reliable are behavioral cues for assessment of male mating status in polyterritorial Wood WarblersPhylloscopus sibilatrix. Behav. Ecol. Sociobiol. 35: 147–152.
Tiainen, J,. (1983): Ecological eneregetics of nestling growth in the willow warbler (Phylloscopus trochilus). Ann. Zool. Fennici 20: 13–24.
Whittingham, L. A., &J. T. Lifjeld (1995): High paternal investment in unrelated young: extra-pair paternity and male parental care in house martins. Behav. Ecol. Sociobiol. 37: 103–108.
Winkel, W., &R. Berndt (1972): Beobachtungen und Experimente zur Dauer der Huderperiode beim Trauerschnäpper (Ficedula hypoleuca). J. Orn. 113: 9–20.
Wittenberger, J. F. (1982): Factors affecting how male and female bobolinks apportion parental investments. Condor 84: 22–39.
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Temrin, H., Brodin, A., Åkerström, O. et al. Parental investment in monogamous pairs of Wood Warblers (Phylloscopus sibilatrix). J Ornithol 138, 93–101 (1997). https://doi.org/10.1007/BF01651655
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DOI: https://doi.org/10.1007/BF01651655