caa a22 4500 465782051 CHVBK 20180323111958.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF00172088 doi (NATIONALLICENCE)springer-10.1007/BF00172088 Experimental manipulation of the dawn and dusk chorus in the blackbird Turdus merula [Elektronische Daten] [Innes Cuthill, William Macdonald] Summary: We present experimental and correlational data that demonstrate that both the nutritional state of the male and his mate's fertility affect the timing and intensity of dawn and dusk song in the blackbird (Turdus merula). Food supplementation leads to paired males singing earlier, for longer, and at higher peak rate at both dusk and dawn succeeding the treatment. We argue that the timing, not just the intensity, of song conveys information about the male's phenotypic condition. Both dawn and dusk song start earlier and have longer duration as a male's mate reaches peak fertility indicating that, in agreement with literature on the great tit (Parus major), song at this time has particular significance in mate guarding for paired males of monogamous species. We discuss the relative importance of these factors as functional explanations for the dawn chorus. Springer-Verlag, 1990 Cuthill Innes aut Macdonald William Edward Grey Institute of Field Ornithology, Department of Zoology, OX1 3PS, South Parks Road, Oxford, UK aut Behavioral Ecology and Sociobiology Springer-Verlag 26/3(1990-03-01), 209-216 0340-5443 26:3<209 1990 26 265 https://doi.org/10.1007/BF00172088 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00172088 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cuthill Innes aut NATIONALLICENCE 700 1- Macdonald William Edward Grey Institute of Field Ornithology, Department of Zoology, OX1 3PS, South Parks Road, Oxford, UK aut NATIONALLICENCE 773 0- Behavioral Ecology and Sociobiology Springer-Verlag 26/3(1990-03-01), 209-216 0340-5443 26:3<209 1990 26 265 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer