Počet záznamů: 1
Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa
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SYSNO ASEP 0369550 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa Tvůrce(i) 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)Celkový počet autorů 7 Zdroj.dok. Ostrich - ISSN 0030-6525
Roč. 82, č. 3 (2011), s. 175-183Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. ZA - Jižní Afrika Klíč. slova home-range size ; Passerine birds ; hypothesis ; edge ; community ; forest ; sites Vědní obor RIV EG - Zoologie CEP GAP505/11/1617 GA ČR - Grantová agentura ČR LC06073 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z60930519 - UBO-W (2005-2011) UT WOS 000299427600003 EID SCOPUS 84857842040 DOI 10.2989/00306525.2011.607863 Anotace 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. Pracoviště Ústav biologie obratlovců Kontakt Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Rok sběru 2012
Počet záznamů: 1