Object

Prolonged incubation of non-viable eggs in the Bearded Vulture Gypaetus barbatus
This publication is protected by copyright. Check the terms of use in the publication description.
This publication is protected by copyright. Check the terms of use in the publication description.

Title: Prolonged incubation of non-viable eggs in the Bearded Vulture Gypaetus barbatus

Creator:

Margalida, Antoni ; Bertran, Joan

Date issued/created:

2006

Resource Type:

Journal

Subtitle:

Inkubowanie martwych jaj u orłosępów brodatych ; Short notes

Contributor:

Museum and Institute of Zoology, Polish Academy of Sciences

Publisher:

Museum and Institute of Zoology, Polish Academy of Sciences

Place of publishing:

Warsaw

Description:

pg(s) 181–184

Abstract:

We present the frequency and duration of prolonged incubation in the Bearded Vulture and test different hypotheses on the possible adaptive significance of this behaviour. The mean and median prolonged incubation lasted 29 and 25 days respectively (n = 10), i.e., 54% and 46% respectively longer than the average incubation period. There was a negative correlation between the duration of prolonged incubation and the egg-laying date: prolonged incubation lasted longer in earlier clutches than in later ones, and territories with many breeding attempts showed short incubation prolongations. On the other hand, no correlation was found between the duration of prolonged incubation and productivity or breeding success. The results suggest that more experienced birds, which occupy higher quality territories and lay their eggs earlier, prolonged their incubation to a greater extent. Although prolonged incubation may constitute an example of adaptive behaviour, the extensive periods documented in some cases do not appear to support this assumption.

Relation:

Acta Ornithologica

Volume:

41

Issue:

2

Start page:

181

End page:

184

Format:

text/xml

Resource Identifier:

oai:rcin.org.pl:55613 ; oai:rcin.org.pl:55613 ; 10.3161/068.041.0204

Source:

MiIZ PAN, call no. P.257 ; MiIZ PAN, call no. P.4568 ; click here to follow the link

Language:

eng

Language of abstract:

pol ; eng

Rights:

Rights Reserved - Restricted Access

Terms of use:

Copyright-protected material. Access only on terminals at the Museum and Institute of Zoology of the Polish Academy of Sciences, may be used within the limits of statutory user freedoms.

Digitizing institution:

Museum and Institute of Zoology of the Polish Academy of Sciences

Original in:

Library of the Museum and Institute of Zoology of the Polish Academy of Sciences

Projects co-financed by:

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