Abstract
In this study we examine male song output as a measure of nest site quality in blackcaps (Sylvia atricapilla). Song rate, breeding success, predation on nests and reaction to playbacks were investigated in individual males. Habitat features determining nest site and song post quality in terms of vegetation cover were compared between successful nests and nests that had suffered predation. We then related song rate of unmated males to habitat factors in territories and nesting sites in order to examine a possible predictor function of blackcap song for habitat quality. Several habitat features are responsible for variation in nesting success. These features also correlate with song rate of unmated males. The study indicates a potential role of song rate in the advertisement of territory quality. Furthermore, the data suggest that females use song rates rather than territory quality in mating decisions. The information females may gain about male quality in relation to territory quality are also discussed.
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Communicated by G.M. Klump
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Hoi-Leitner, M., Nechtelberger, H. & Hoi, H. Song rate as a signal for nest site quality in blackcaps (Sylvia atricapilla). Behav Ecol Sociobiol 37, 399–405 (1995). https://doi.org/10.1007/BF00170587
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DOI: https://doi.org/10.1007/BF00170587