Breeding biology, sexually dimorphic development and nestling testosterone concentrations of the classically polyandrous African black coucal, Centropus grillii

作者: Wolfgang Goymann , Bart Kempenaers , John Wingfield

DOI: 10.1007/S10336-005-0004-X

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摘要: Many internal and environmental factors influence the growth of birds. Here we ask whether reversed sexual dimorphism in classically polyandrous black coucal is reflected differential fledging parameters females males. We also investigate androgen concentrations were higher than males during nestling development, thus, providing a potential mechanism for ‘behavioural masculinization’ female coucals. Furthermore, give detailed description breeding biology this little studied unusual bird species. Black eggs smaller, incubation periods shorter expected that size. In absolute terms coucals grew faster left nest with larger body mass, suggesting are more expensive sex to rear However, relation adult size, slower reached smaller proportion their size upon fledging. ‘Testosterone’ significantly male nestlings, hence not supporting role circulating androgens ontogeny sex-role reversal. To our knowledge, early differences ‘testosterone’ levels represent first evidence such exist nestlings altricial present anecdotal may be related an maturation reproductive organs but males, structural rates.

参考文章(55)
Helen L. Henry, A. W. Norman, Encyclopedia of hormones Academic Press. ,(2003)
Mart R Gross, The evolution of parental care ,(1991)
Eberhard Gwinner, Peter Berthold, Frühe Geschlechtsreife beim Fichtenkreuzschnabel (Loxia curvirostra) Die Vogelwarte. ,vol. 26, pp. 356- 357 ,(1972)
Karen L. Krijgsveld, Cor Dijkstra, G. Henk Visser, Serge Daan, Energy requirements for growth in relation to sexual size dimorphism in marsh harrier Circus aeruginosus nestlings. Physiological and Biochemical Zoology. ,vol. 71, pp. 693- 702 ,(1998) , 10.1086/515983
Roxana Torres, Hugh Drummond, Does large size make daughters of the blue‐footed booby more expensive than sons? Journal of Animal Ecology. ,vol. 68, pp. 1133- 1141 ,(1999) , 10.1046/J.1365-2656.1999.00357.X
H. Schwabl, Yolk is a source of maternal testosterone for developing birds Proceedings of the National Academy of Sciences of the United States of America. ,vol. 90, pp. 11446- 11450 ,(1993) , 10.1073/PNAS.90.24.11446
Marc Naguib, Katharina Riebel, Alfonso Marzal, Diego Gil, Nestling immunocompetence and testosterone covary with brood size in a songbird. Proceedings of The Royal Society B: Biological Sciences. ,vol. 271, pp. 833- 838 ,(2004) , 10.1098/RSPB.2003.2673
David J. Anderson, Jo Reeve, Juan E. Martinez Gomez, Wesley W. Weathers, Siobhan Hutson, Heather V. Cunningham, David M. Bird, Sexual size dimorphism and food requirements of nestling birds Canadian Journal of Zoology. ,vol. 71, pp. 2541- 2545 ,(1993) , 10.1139/Z93-347