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Food supply and external cues limit the clutch size and hatchability in the White Stork Ciconia ciconia
Département de Biologie, Université Farhat Abbes, Sétif, Algeria. (Biologi)
Univ Cordoba, Dept Zool, Cordoba, Spain. (Biologi)
University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för naturvetenskap. (Biologi)
Ecole Nationale Supérieure d'Agronomie, El Harrach, Algeria. (Biologi)
2008 (English)In: Acta Ornithologica, ISSN 0001-6454, E-ISSN 1734-8471, Vol. 43, no 2, p. 145-150Article in journal (Refereed) Published
Abstract [en]

Clutch size is an important life history trait and factors such as nest predation and food availability can both be of crucial importance for its variation in nature. The aim of the present study was to evaluate the effects of extra food on clutch size, laying date and hatching success in the White stork Ciconia ciconia. Three different colonies of White stork were studied over a three-year period where there was difference in both food availability and precipitation. This study demonstrated that an extra food supply during the pre-laying period had a positive effect on clutch size - nests with extra food had a larger clutch size. There was also an advance in laying date and a higher hatching success in nests with access to extra food. In addition to food supply, clutch size was independently affected by rainfall, which suggests that parents additionally also were sensitive to other external cues than to the extra food. Furthermore, this study also suggests that an extra food during the incubation period could probably help the parents to solve the conflict between incubation behaviour and minimizing the time off the nest, i.e. increasing nest attentiveness in nests with extra food.

Place, publisher, year, edition, pages
2008. Vol. 43, no 2, p. 145-150
Keywords [en]
life history, clutch size, laying date, white stork, extra feeding
National Category
Ecology
Identifiers
URN: urn:nbn:se:hig:diva-1851DOI: 10.3161/000164508X395252ISI: 000262817800004Scopus ID: 2-s2.0-62149149821OAI: oai:DiVA.org:hig-1851DiVA, id: diva2:118513
Available from: 2008-05-28 Created: 2008-05-28 Last updated: 2018-03-13Bibliographically approved

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Hillström, Lars

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CiteExportLink to record
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