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Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa
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SYSNO ASEP 0369550 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa Author(s) Hořák, D. (CZ)
Sedláček, O. (CZ)
Tószögyová, A. (CZ)
Albrecht, Tomáš (UBO-W) RID, SAI, ORCID
Ferenc, M. (CZ)
Jelínek, V. (CZ)
Storch, D. (CZ)Number of authors 7 Source Title Ostrich - ISSN 0030-6525
Roč. 82, č. 3 (2011), s. 175-183Number of pages 14 s. Language eng - English Country ZA - South Africa Keywords home-range size ; Passerine birds ; hypothesis ; edge ; community ; forest ; sites Subject RIV EG - Zoology R&D Projects GAP505/11/1617 GA ČR - Czech Science Foundation (CSF) LC06073 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z60930519 - UBO-W (2005-2011) UT WOS 000299427600003 EID SCOPUS 84857842040 DOI 10.2989/00306525.2011.607863 Annotation Geographic variation in avian clutch size is thought to be related to the variation in nest predation rate and food availability. We studied predation on artificial ground nests along a large-scale geographic gradient in South Africa, and calculated mean clutch sizes of birds occurring in atlas quadrates surrounding our study sites. Clutch sizes generally increased with increasing productivity and seasonality. The least productive desert site was characterised also by the highest predation rate, whereas all the other sites located in savannas revealed much lower and more or less constant predation rate. We found no evidence for relationship between nest predation rates and clutch sizes of ground-nesting birds. This indicates that food availability is the major factor responsible for geographical variation in bird clutch sizes across South Africa, though high predation rate might also contribute to low clutch size in least productive arid environments. Workplace Institute of Vertebrate Biology Contact Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Year of Publishing 2012
Number of the records: 1