Metadata language
First Breeding Age in Captive and Wild Bearded Vultures Gypaetus barbatus
Subtitle:Wiek orłosępów przystępujących po raz pierwszy do lęgów ; Short notes
Creator:Antor, Ramón J ; Margalida, Antoni ; Frey, Hans ; Heredia, Rafael ; Lorente, Luis ; Sesé, José Antonio
Contributor:Museum and Institute of Zoology, Polish Academy of Sciences
Publisher:Museum and Institute of Zoology, Polish Academy of Sciences ; Natura Optima Dux Foundation
Place of publishing: Date issued/created: Description: Type of object: Subject and Keywords:Bearded Vulture ; Gypaetus barbatus ; age of first breeding ; delayed maturity ; orłosęp ; orłosęp brodaty
Abstract:We present data on the age of first breeding in captive and wild Bearded Vultures. The mean age of first breeding (egg-laying) in the captive population was 7.7 years for females and 8.9 for males. The first offspring was raised on average by 8.3-year-old females and 9.7-year-old males. In wild Bearded Vultures, first-time-paired and territorial individuals were recorded when they were 6.5 years old, on average. The mean age of first breeding was 8.1 years, whereas the mean age of first successful breeding was 11.4. Paired females were recorded at the age of 6.5 years and breeding at 6, whereas the youngest recorded paired males were 6.4 years old and breeding at 7. 39.5% of the marked birds alive over 6 years were recorded as not yet territorial, suggesting the existence of a substantial fraction of adult floaters without breeding territories. Pyrenean Bearded Vultures are characterized by delayed reproduction, with the first breeding attempt taking place well after the acquisition of full adult plumage. We discuss whether deferred breeding in this increasing population could be explained by the increase in density and/or mortality rate in the younger age groups, which could affect the age of maturity.
Relation: Volume: Issue: Start page: End page: Resource type: Detailed Resource Type: Format: Resource Identifier: Source:MiIZ PAN, call no. P.257 ; MiIZ PAN, call no. P.4568 ; click here to follow the link
Language: Language of abstract: Rights: Terms of use:Copyright-protected material. 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
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https://www.bioone.org/doi/pdf/10.3161/068.042.0106