Parental investment in two large raptors breeding in a high prey density area.
We investigated the breeding behaviour of Bearded Vulture Gypaetus barbatus and Golden Eagle Aquila chrysaetos between 2008 and 2011 in the Stelvio National Park (the Alps, Italy), which harbours one of highest densities of wild ungulates in the Alps. Parental care behaviours (incubation and chick b...
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Online Access: | https://hdl.handle.net/11567/860047 https://doi.org/10.1007/s10336-016-1407-6 |
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ftunivgenova:oai:iris.unige.it:11567/860047 2024-04-14T08:20:55+00:00 Parental investment in two large raptors breeding in a high prey density area. BASSI E. TROTTI P. BRAMBILLA M. DIANA F. SARTIRANA F. GALLI, LORIS PEDROTTI L. Bassi, E. Trotti, P. Brambilla, M. Diana, F. Sartirana, F. Galli, Lori Pedrotti, L. 2016 ELETTRONICO https://hdl.handle.net/11567/860047 https://doi.org/10.1007/s10336-016-1407-6 eng eng Springer info:eu-repo/semantics/altIdentifier/wos/WOS:000398589200019 volume:158 (2) firstpage:549 lastpage:559 numberofpages:11 journal:JOURNAL OF ORNITHOLOGY https://hdl.handle.net/11567/860047 doi:10.1007/s10336-016-1407-6 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85015748419 Alps Aquila chrysaetos Carrion abundance Gypaetus barbatus Sexual investment info:eu-repo/semantics/article 2016 ftunivgenova https://doi.org/10.1007/s10336-016-1407-6 2024-03-21T02:26:04Z We investigated the breeding behaviour of Bearded Vulture Gypaetus barbatus and Golden Eagle Aquila chrysaetos between 2008 and 2011 in the Stelvio National Park (the Alps, Italy), which harbours one of highest densities of wild ungulates in the Alps. Parental care behaviours (incubation and chick brooding, nest attendance, changeover, food provisioning and nestling feeding) were recorded at nests of both species (four Bearded Vulture and 14 Golden Eagle pairs). Differences in investment between sexes and periods were found in both species: the time spent in incubation and nest attendance was higher in females and decreased with the progress of the breeding season (from incubation to posthatching and to pre-fledging). A significant effect of the interaction between sex and period was also found. Compared to the literature, our results suggest a lower contribution by Bearded Vulture males, whereas Golden Eagle males spent more time in incubation and nestling brooding than reported. The higher investment shown by Golden Eagle males in our study area may be due to the high availability of live prey and ungulate carrion, which could allow males to spend less time in hunting, resulting in more time at the nest. Most changeovers for both species took place in the central hours of the day. No difference in food provisioning was observed between the sexes of the two species, consistent with information available for Bearded Vultures, but not for Golden Eagles. The patterns we found revealed a female-biased investment (unexpected for the Bearded Vulture), although males significantly contributed to nest behaviour, especially during the incubation period (unexpected for Golden Eagles). The large amounts of natural prey and carrion in the study area may contribute to the nest behaviour of these large raptors. Article in Journal/Newspaper Aquila chrysaetos golden eagle Università degli Studi di Genova: CINECA IRIS Journal of Ornithology 158 2 549 559 |
institution |
Open Polar |
collection |
Università degli Studi di Genova: CINECA IRIS |
op_collection_id |
ftunivgenova |
language |
English |
topic |
Alps Aquila chrysaetos Carrion abundance Gypaetus barbatus Sexual investment |
spellingShingle |
Alps Aquila chrysaetos Carrion abundance Gypaetus barbatus Sexual investment BASSI E. TROTTI P. BRAMBILLA M. DIANA F. SARTIRANA F. GALLI, LORIS PEDROTTI L. Parental investment in two large raptors breeding in a high prey density area. |
topic_facet |
Alps Aquila chrysaetos Carrion abundance Gypaetus barbatus Sexual investment |
description |
We investigated the breeding behaviour of Bearded Vulture Gypaetus barbatus and Golden Eagle Aquila chrysaetos between 2008 and 2011 in the Stelvio National Park (the Alps, Italy), which harbours one of highest densities of wild ungulates in the Alps. Parental care behaviours (incubation and chick brooding, nest attendance, changeover, food provisioning and nestling feeding) were recorded at nests of both species (four Bearded Vulture and 14 Golden Eagle pairs). Differences in investment between sexes and periods were found in both species: the time spent in incubation and nest attendance was higher in females and decreased with the progress of the breeding season (from incubation to posthatching and to pre-fledging). A significant effect of the interaction between sex and period was also found. Compared to the literature, our results suggest a lower contribution by Bearded Vulture males, whereas Golden Eagle males spent more time in incubation and nestling brooding than reported. The higher investment shown by Golden Eagle males in our study area may be due to the high availability of live prey and ungulate carrion, which could allow males to spend less time in hunting, resulting in more time at the nest. Most changeovers for both species took place in the central hours of the day. No difference in food provisioning was observed between the sexes of the two species, consistent with information available for Bearded Vultures, but not for Golden Eagles. The patterns we found revealed a female-biased investment (unexpected for the Bearded Vulture), although males significantly contributed to nest behaviour, especially during the incubation period (unexpected for Golden Eagles). The large amounts of natural prey and carrion in the study area may contribute to the nest behaviour of these large raptors. |
author2 |
Bassi, E. Trotti, P. Brambilla, M. Diana, F. Sartirana, F. Galli, Lori Pedrotti, L. |
format |
Article in Journal/Newspaper |
author |
BASSI E. TROTTI P. BRAMBILLA M. DIANA F. SARTIRANA F. GALLI, LORIS PEDROTTI L. |
author_facet |
BASSI E. TROTTI P. BRAMBILLA M. DIANA F. SARTIRANA F. GALLI, LORIS PEDROTTI L. |
author_sort |
BASSI E. |
title |
Parental investment in two large raptors breeding in a high prey density area. |
title_short |
Parental investment in two large raptors breeding in a high prey density area. |
title_full |
Parental investment in two large raptors breeding in a high prey density area. |
title_fullStr |
Parental investment in two large raptors breeding in a high prey density area. |
title_full_unstemmed |
Parental investment in two large raptors breeding in a high prey density area. |
title_sort |
parental investment in two large raptors breeding in a high prey density area. |
publisher |
Springer |
publishDate |
2016 |
url |
https://hdl.handle.net/11567/860047 https://doi.org/10.1007/s10336-016-1407-6 |
genre |
Aquila chrysaetos golden eagle |
genre_facet |
Aquila chrysaetos golden eagle |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000398589200019 volume:158 (2) firstpage:549 lastpage:559 numberofpages:11 journal:JOURNAL OF ORNITHOLOGY https://hdl.handle.net/11567/860047 doi:10.1007/s10336-016-1407-6 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85015748419 |
op_doi |
https://doi.org/10.1007/s10336-016-1407-6 |
container_title |
Journal of Ornithology |
container_volume |
158 |
container_issue |
2 |
container_start_page |
549 |
op_container_end_page |
559 |
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1796299340502794240 |