Metadata language
Breeding in calcium-poor habitats: are there any extra costs?
Subtitle:Acta Ornithologica, vol. 34, no. 2 ; Gniazdowanie ptaków w środowiskach ubogich w wapń
Creator:Tilgar, Vallo (1973– ) ; Mänd, Raivo (1954– ) ; Leivits, Agu
Contributor:Polska Akademia Nauk. Muzeum i Instytut Zoologii ; Meeting of the European Ornithologists' Union (2 ; 1999 ; Gdańsk)
Publisher:Muzeum i Instytut Zoologii PAN
Place of publishing: Date issued/created: Description:Referat wygłoszony na Second Meeting of the European Ornithologists' Union ; Bibliogr. s. 217-218 ; S. [215]-218 ; 27 cm ; Streszcz. pol.
Type of object: Subject and Keywords:Bogatka -- jaja -- Estonia -- konferencje [KABA] ; Muchołówka żałobna -- jaja -- Estonia -- konferencje [KABA] ; środowiska ubogie w wapń ; dostępność wapnia ; skorupki jajowe ; muchołówki ; sikory ; ptaki ; Ficedula hypoleuca ; Muscicapidae ; Parus major ; Paridae ; Aves
Abstract: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.
Relation: Volume: Issue: Start page: End page: Resource type: Detailed Resource Type:Artykuł ; Materiały konferencyjne
Format: Source:MiIZ PAN, patrz sygn. czas. P.257, Vol. 34, No 2 ; MiIZ PAN, patrz sygn. czas. P.4568, Vol. 34, No 2 ; click here to follow the link
Language: Rights:Prawa zastrzeżone - dostęp ograniczony
Terms of use: Digitizing institution:Muzeum i Instytut Zoologii Polskiej Akademii Nauk
Original in:Biblioteka Muzeum i Instytutu Zoologii PAN
Projects co-financed by:Program Operacyjny Innowacyjna Gospodarka, lata 2010-2014, Priorytet 2. Infrastruktura strefy B + R ; Unia Europejska. Europejski Fundusz Rozwoju Regionalnego
Access: