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Effects of Food Supplementation and Habitat Selection on Timing of Lesser Kestrel Breeding

2002; Wiley; Volume: 83; Issue: 3 Linguagem: Inglês

10.2307/3071888

1939-9170

José Miguel Aparicio, Raúl Bonal,

Bird parasitology and diseases

EcologyVolume 83, Issue 3 p. 873-877 Note EFFECTS OF FOOD SUPPLEMENTATION AND HABITAT SELECTION ON TIMING OF LESSER KESTREL BREEDING José Miguel Aparicio, José Miguel Aparicio Museo Nacional de Ciencias Naturales (CSIC), Departamento de Ecología Evolutiva, J. Gutiérrez Abascal 2, E-28006 Madrid, Spain Present address: Instituto de Investigación en Recursos Cinegéticos (CSIC, UCLM, JCCM), Ronda de Toledo s/n, E-13005 Ciudad Real, Spain. E-mail: [email protected]Search for more papers by this authorRaúl Bonal, Raúl Bonal Museo Nacional de Ciencias Naturales (CSIC), Departamento de Ecología Evolutiva, J. Gutiérrez Abascal 2, E-28006 Madrid, Spain Present address: Departamento de Ciencias Ambientales, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, E-45071 Toledo, Spain.Search for more papers by this author José Miguel Aparicio, José Miguel Aparicio Museo Nacional de Ciencias Naturales (CSIC), Departamento de Ecología Evolutiva, J. Gutiérrez Abascal 2, E-28006 Madrid, Spain Present address: Instituto de Investigación en Recursos Cinegéticos (CSIC, UCLM, JCCM), Ronda de Toledo s/n, E-13005 Ciudad Real, Spain. E-mail: [email protected]Search for more papers by this authorRaúl Bonal, Raúl Bonal Museo Nacional de Ciencias Naturales (CSIC), Departamento de Ecología Evolutiva, J. Gutiérrez Abascal 2, E-28006 Madrid, Spain Present address: Departamento de Ciencias Ambientales, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, E-45071 Toledo, Spain.Search for more papers by this author First published: 01 March 2002 https://doi.org/10.1890/0012-9658(2002)083[0873:EOFSAH]2.0.CO;2Citations: 44 Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Numerous experimental studies providing extra food have concluded that food availability at the beginning of the breeding season constrains the start of egg-laying for female birds (Food Supply Hypothesis) because supplemented females usually lay earlier than nonsupplemented ones. This conclusion has recently been questioned because food addition studies may be confounded by ordered habitat selection. Ordered habitat selection occurs when territories or nests provided with extra food are chosen by individuals of higher quality that may be able to initiate breeding early, regardless of food supply (Habitat Selection Hypothesis). To test these two hypotheses, we performed an experiment using the Lesser Kestrel (Falco naumanni). To reveal effects of ordered habitat selection, extra food was provided to half of the nests in two colonies in which the other nests remained unsupplemented (mixed colonies). We provided extra food to all nests in two colonies (all-fed colonies) and to no nests in three colonies (all-unfed colonies). In these colonies, ordered habitat selection could not occur because all nests received equal treatment. In mixed colonies, fed pairs laid earlier than unfed ones. In contrast to the prediction of the Habitat Selection Hypothesis, there was no significant difference in mean laying date between unfed pairs of mixed colonies and pairs in all-unfed colonies, or between fed pairs of mixed colonies and pairs in all-fed colonies. Moreover, laying date was significantly earlier in all-fed than in all-unfed colonies. Therefore, the results support the Food Supply Hypothesis and refute the Habitat Selection Hypothesis. Literature Cited Aparicio, J. M. 1994. The seasonal decline in clutch size: an experiment with supplementary food in the kestrel, Falco tinnunculus. Oikos 71: 451– 458. Aparicio, J. M. 1997. 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