La Tour du Valat

Article

Calcium shortage as a constraint on reproduction in great tits Parus major: a field experiment

V. Tilgar, Auteur ; R. Mand, Auteur ; M. Magi, Auteur

Dans Journal of Avian Biology (33(4) DEC 2002)

Several bird species breeding in acidified habitats face serious problems caused by lowered availability of calcium-rich foods. Moreover, recent studies have revealed that calcium shortage causes phenotypic variation in certain reproductive para[...]

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Article

Effect of calcium availability and habitat quality on reproduction in Pied Flycatcher Ficedula hypoleuca and Great Tit Paras major

V. Tilgar, Auteur ; R. Mand, Auteur ; A. Leivits, Auteur

Dans Journal of Avian Biology (30(4) DEC 1999)

Recent studies have demonstrated that wild birds breeding in acidified areas may have difficulties in obtaining sufficient calcium for their eggshells, and that a shortage of land snails may be the cause. Here we present experimental evidence th[...]

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Article

Physiological costs of egg production and effects of habitat indicated by state of hernatological health in incubating Great Tits

P. Kilgas, Auteur ; R. Mand, Auteur ; V. Tilgar, Auteur ; M. Magi, Auteur ; A. Leivits, Auteur

Dans Journal of Ornithology (147(5, Suppl. 1) AUG 2006)

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Article

Providing nest boxes for birds: Does habitat matter?

R. Mand, Auteur ; V. Tilgar, Auteur ; A. Lohmus, Auteur ; A. Leivits, Auteur

Dans Journal of Ornithology (147(5, Suppl. 1) AUG 2006)

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