Tilgar, Vallo (1973– ) ; Mänd, Raivo (1954– ) ; Leivits, Agu
Acta Ornithologica, vol. 34, no. 2 ; Gniazdowanie ptaków w środowiskach ubogich w wapń
Polska Akademia Nauk. Muzeum i Instytut Zoologii ; Meeting of the European Ornithologists' Union (2 ; 1999 ; Gdańsk)
Muzeum i Instytut Zoologii PAN
Referat wygłoszony na Second Meeting of the European Ornithologists' Union ; Bibliogr. s. 217-218 ; S. [215]-218 ; 27 cm ; Streszcz. pol.
Wild birds breeding in acidified areas may have difficulties obtaining sufficient calcium for their eggshells, and shortage of land snails is shown to be the cause. The study found experimental evidence that Ca deficiency may affect reproductive traits also in birds breeding in non-acidified but naturally base-poor habitats. Positive effects of calcium supplementation on the egg volume, shell thickness, start of laying and fledglings' parameters of Great Tits Parus major and Pied Flycatchers Ficedula hypoleuca breeding in base-poor pine forests in Estonia were revealed. The adverse effects of calcium shortage seem to be more pronounced in the years with the most unfavourable breeding conditions. Authors suggest that in such years birds may respond to calcium shortage by postponing egg-laying. The cost of egg formation in base-poor areas might be much higher than has been estimated on the basis of the energy and protein content of eggs. This fact should be considered more seriously in life history models of wild birds.
Artykuł ; Materiały konferencyjne
MiIZ PAN, patrz sygn. czas. P.257, Vol. 34, No 2 ; MiIZ PAN, patrz sygn. czas. P.4568, Vol. 34, No 2 ; kliknij tutaj, żeby przejść
Prawa zastrzeżone - dostęp ograniczony
Muzeum i Instytut Zoologii Polskiej Akademii Nauk
Biblioteka Muzeum i Instytutu Zoologii PAN
Program Operacyjny Innowacyjna Gospodarka, lata 2010-2014, Priorytet 2. Infrastruktura strefy B + R ; Unia Europejska. Europejski Fundusz Rozwoju Regionalnego
2 paź 2020
20 maj 2014
76
https://rcin.org.pl./publication/61254
Nazwa wydania | Data |
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Breeding in calcium-poor habitats: are there any extra costs? / Tilgar, Vallo (1973- ) | 2 paź 2020 |
Kilgas, Priit Tilgar, Vallo Mägi, Marko Mänd, Raivo
Sánchez, Sara Javier Cuervo, José Moreno, Eulalia
Margalida, Antoni Bertran, Joan
Typiak, Jakub Typiak, Marlena
Margielewski, Włodzimierz
Shore, R. F. Balment, R. J. Yalden, D. W.
Maran, T. Kruuk, H. Macdonald, D. W. Polma, M.