Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F11%3A10100932" target="_blank" >RIV/00216208:11310/11:10100932 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081766:_____/11:00369550

Výsledek na webu

<a href="http://dx.doi.org/10.2989/00306525.2011.607863" target="_blank" >http://dx.doi.org/10.2989/00306525.2011.607863</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2989/00306525.2011.607863" target="_blank" >10.2989/00306525.2011.607863</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa.

Popis výsledku v původním jazyce

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 meanclutch 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, whereasall 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.

Název v anglickém jazyce

Geographic variation in avian clutch size and nest predation risk along a productivity gradient in South Africa.

Popis výsledku anglicky

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 meanclutch 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, whereasall 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EG - Zoologie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ostrich

ISSN

0030-6525

e-ISSN

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Svazek periodika

82

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

ZA - Jihoafrická republika

Počet stran výsledku

14

Strana od-do

175-183

Kód UT WoS článku

000299427600003

EID výsledku v databázi Scopus

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