La Tour du Valat

Article

Do birds behave in order to avoid disclosing their nest site?

S. Bures, Auteur ; V. Pavel, Auteur

Dans Bird Study (50 JUL 2003)

Capsule Three similarly sized passerine species with various breeding strategies behaved differently in the presence of models of mammalian and avian predators. Aims We tested whether solitary breeders behave in the presence of a predator in ord[...]

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Article

Do pipits use experimentally supplemented rich sources of calcium more often in an acidified area?

S. Bures, Auteur ; K. Weidinger, Auteur

Dans Journal of Avian Biology (32(2) JUN 2001)

How birds respond to the recent phenomenon of calcium deficiency in acidified areas is still poorly known. This study, carried out in the Jeseniky Mountains (heavily polluted, acidified area in the Czech Republic), in alpine ecosystems of centra[...]

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Article

Estimation of calcium intake by Meadow Pipit nestlings in an acidified area

S. Bures, Auteur ; K. Weidinger, Auteur

Dans Journal of Avian Biology (31(3) September, 2000)

Calcium availability might Limit reproductive output in birds either by effects on eggshell formation or on skeletal growth of nestlings. Quantitative data on calcium intake by nestlings of free-living passerines are needed to test the second hy[...]

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