Correspondence
doi:10.1111/j.1469-7998.2008.00447.x Food supply is a major source of variation in breeding success for predators, and to what extent individuals are able to cope with temporal variability in food availability remains an outstanding question in life-history studies. We confronted the natural variati...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.535.7651 2023-05-15T15:56:36+02:00 Correspondence A. Millon B. E. Arroyo V. Bretagnolle The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.535.7651 http://www.cebc.cnrs.fr/publipdf/2008/MJZ349.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.535.7651 http://www.cebc.cnrs.fr/publipdf/2008/MJZ349.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cebc.cnrs.fr/publipdf/2008/MJZ349.pdf clutch size Microtus arvalis vole cycle text 2007 ftciteseerx 2016-01-08T10:48:42Z doi:10.1111/j.1469-7998.2008.00447.x Food supply is a major source of variation in breeding success for predators, and to what extent individuals are able to cope with temporal variability in food availability remains an outstanding question in life-history studies. We confronted the natural variation in clutch size and breeding success with results from a food supplementation experiment during egg formation, conducted over several con-trasted years of natural food supply in an avian specialist predator, the Montagu’s harrier Circus pygargus. This raptor mainly preys on common vole Microtus arvalis a cyclic microtine under temperate latitudes. Vole abundance together with timing of breeding accounted for most of the variance in clutch size and number of fledglings. Results from empirical and experimental data were overall in agree-ment. Fed pairs consistently increased clutch size compared with controls in all experimental years, whereas no effect of food supplementation on egg volume was detected. Supplemented pairs, however, did not fledge significantly more chicks than controls. The costs entailed by the increase in clutch size appear nevertheless to be limited compared with previous studies. Food supply seemed therefore to display sufficient predictability throughout a breeding season to afford individuals the opportunity to adjust their breeding effort to an optimal number of offspring, in agreement with Lack’s anticipation hypothesis. Text Common vole Microtus arvalis Unknown |
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ftciteseerx |
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English |
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clutch size Microtus arvalis vole cycle |
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clutch size Microtus arvalis vole cycle A. Millon B. E. Arroyo V. Bretagnolle Correspondence |
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clutch size Microtus arvalis vole cycle |
description |
doi:10.1111/j.1469-7998.2008.00447.x Food supply is a major source of variation in breeding success for predators, and to what extent individuals are able to cope with temporal variability in food availability remains an outstanding question in life-history studies. We confronted the natural variation in clutch size and breeding success with results from a food supplementation experiment during egg formation, conducted over several con-trasted years of natural food supply in an avian specialist predator, the Montagu’s harrier Circus pygargus. This raptor mainly preys on common vole Microtus arvalis a cyclic microtine under temperate latitudes. Vole abundance together with timing of breeding accounted for most of the variance in clutch size and number of fledglings. Results from empirical and experimental data were overall in agree-ment. Fed pairs consistently increased clutch size compared with controls in all experimental years, whereas no effect of food supplementation on egg volume was detected. Supplemented pairs, however, did not fledge significantly more chicks than controls. The costs entailed by the increase in clutch size appear nevertheless to be limited compared with previous studies. Food supply seemed therefore to display sufficient predictability throughout a breeding season to afford individuals the opportunity to adjust their breeding effort to an optimal number of offspring, in agreement with Lack’s anticipation hypothesis. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
A. Millon B. E. Arroyo V. Bretagnolle |
author_facet |
A. Millon B. E. Arroyo V. Bretagnolle |
author_sort |
A. Millon |
title |
Correspondence |
title_short |
Correspondence |
title_full |
Correspondence |
title_fullStr |
Correspondence |
title_full_unstemmed |
Correspondence |
title_sort |
correspondence |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.535.7651 http://www.cebc.cnrs.fr/publipdf/2008/MJZ349.pdf |
genre |
Common vole Microtus arvalis |
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Common vole Microtus arvalis |
op_source |
http://www.cebc.cnrs.fr/publipdf/2008/MJZ349.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.535.7651 http://www.cebc.cnrs.fr/publipdf/2008/MJZ349.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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