Covariation between plumage colour polymorphism and diet in the Barn Owl Tyto alba
Several hypotheses might explain the evolution and maintenance of colour morphs within animal populations. The 'alternative foraging strategy' hypothesis states that alternative colour morphs exploit different ecological niches. This hypothesis predicts that morphs differ in diet, either b...
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ftunivlausanne:oai:serval.unil.ch:BIB_64FF3344F751 2024-02-11T10:05:51+01:00 Covariation between plumage colour polymorphism and diet in the Barn Owl Tyto alba Roulin, A. 2004 application/pdf https://serval.unil.ch/notice/serval:BIB_64FF3344F751 https://doi.org/10.1111/j.1474-919x.2004.00292.x https://serval.unil.ch/resource/serval:BIB_64FF3344F751.P001/REF.pdf eng eng info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1474-919x.2004.00292.x info:eu-repo/semantics/altIdentifier/pissn/0019-1019 https://serval.unil.ch/notice/serval:BIB_64FF3344F751 doi:10.1111/j.1474-919x.2004.00292.x https://serval.unil.ch/resource/serval:BIB_64FF3344F751.P001/REF.pdf info:eu-repo/semantics/restrictedAccess Restricted: indefinite embargo Copying allowed only for non-profit organizations https://serval.unil.ch/disclaimer Ibis, vol. 146, no. 3, pp. 509-517 APOSTATIC SELECTION PREDATION FEMALE DIMORPHISM BEHAVIOR RODENTS ARANEAE MORPHS PREY info:eu-repo/semantics/article article info:eu-repo/semantics/submittedVersion 2004 ftunivlausanne https://doi.org/10.1111/j.1474-919x.2004.00292.x 2024-01-22T01:08:11Z Several hypotheses might explain the evolution and maintenance of colour morphs within animal populations. The 'alternative foraging strategy' hypothesis states that alternative colour morphs exploit different ecological niches. This hypothesis predicts that morphs differ in diet, either because foraging success on alternative prey species is morph-dependent or because differently coloured individuals exploit alternative habitats. I examined this prediction in the Barn Owl Tyto alba, a bird that varies in plumage coloration continuously from dark reddish-brown to white. On the European continent, Owls are light-coloured (subspecies T. a. alba) in the south and reddish-brown (T. a. guttata) in the north; in central Europe the two subspecies interbreed, generating many colour variants. If plumage coloration indicates alternative foraging strategies, in sympatry dark- and light-coloured owls should consume prey species that are typical of the diets of T. a. guttata and T. a. alba in allopatry, respectively. In line with this prediction, both in allopatry and in sympatry in Switzerland T. a. guttata fed primarily upon Common Voles Microtus arvalis and T. a. alba upon Wood Mice Apodemus spp. Statistical analyses suggest that morph-dependent diet did not arise from a non-random habitat distribution of owls with respect to plumage coloration. This suggests that foraging success upon alternative prey is morph-dependent. Article in Journal/Newspaper Microtus arvalis Université de Lausanne (UNIL): Serval - Serveur académique lausannois Ibis 146 3 509 517 |
institution |
Open Polar |
collection |
Université de Lausanne (UNIL): Serval - Serveur académique lausannois |
op_collection_id |
ftunivlausanne |
language |
English |
topic |
APOSTATIC SELECTION PREDATION FEMALE DIMORPHISM BEHAVIOR RODENTS ARANEAE MORPHS PREY |
spellingShingle |
APOSTATIC SELECTION PREDATION FEMALE DIMORPHISM BEHAVIOR RODENTS ARANEAE MORPHS PREY Roulin, A. Covariation between plumage colour polymorphism and diet in the Barn Owl Tyto alba |
topic_facet |
APOSTATIC SELECTION PREDATION FEMALE DIMORPHISM BEHAVIOR RODENTS ARANEAE MORPHS PREY |
description |
Several hypotheses might explain the evolution and maintenance of colour morphs within animal populations. The 'alternative foraging strategy' hypothesis states that alternative colour morphs exploit different ecological niches. This hypothesis predicts that morphs differ in diet, either because foraging success on alternative prey species is morph-dependent or because differently coloured individuals exploit alternative habitats. I examined this prediction in the Barn Owl Tyto alba, a bird that varies in plumage coloration continuously from dark reddish-brown to white. On the European continent, Owls are light-coloured (subspecies T. a. alba) in the south and reddish-brown (T. a. guttata) in the north; in central Europe the two subspecies interbreed, generating many colour variants. If plumage coloration indicates alternative foraging strategies, in sympatry dark- and light-coloured owls should consume prey species that are typical of the diets of T. a. guttata and T. a. alba in allopatry, respectively. In line with this prediction, both in allopatry and in sympatry in Switzerland T. a. guttata fed primarily upon Common Voles Microtus arvalis and T. a. alba upon Wood Mice Apodemus spp. Statistical analyses suggest that morph-dependent diet did not arise from a non-random habitat distribution of owls with respect to plumage coloration. This suggests that foraging success upon alternative prey is morph-dependent. |
format |
Article in Journal/Newspaper |
author |
Roulin, A. |
author_facet |
Roulin, A. |
author_sort |
Roulin, A. |
title |
Covariation between plumage colour polymorphism and diet in the Barn Owl Tyto alba |
title_short |
Covariation between plumage colour polymorphism and diet in the Barn Owl Tyto alba |
title_full |
Covariation between plumage colour polymorphism and diet in the Barn Owl Tyto alba |
title_fullStr |
Covariation between plumage colour polymorphism and diet in the Barn Owl Tyto alba |
title_full_unstemmed |
Covariation between plumage colour polymorphism and diet in the Barn Owl Tyto alba |
title_sort |
covariation between plumage colour polymorphism and diet in the barn owl tyto alba |
publishDate |
2004 |
url |
https://serval.unil.ch/notice/serval:BIB_64FF3344F751 https://doi.org/10.1111/j.1474-919x.2004.00292.x https://serval.unil.ch/resource/serval:BIB_64FF3344F751.P001/REF.pdf |
genre |
Microtus arvalis |
genre_facet |
Microtus arvalis |
op_source |
Ibis, vol. 146, no. 3, pp. 509-517 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1474-919x.2004.00292.x info:eu-repo/semantics/altIdentifier/pissn/0019-1019 https://serval.unil.ch/notice/serval:BIB_64FF3344F751 doi:10.1111/j.1474-919x.2004.00292.x https://serval.unil.ch/resource/serval:BIB_64FF3344F751.P001/REF.pdf |
op_rights |
info:eu-repo/semantics/restrictedAccess Restricted: indefinite embargo Copying allowed only for non-profit organizations https://serval.unil.ch/disclaimer |
op_doi |
https://doi.org/10.1111/j.1474-919x.2004.00292.x |
container_title |
Ibis |
container_volume |
146 |
container_issue |
3 |
container_start_page |
509 |
op_container_end_page |
517 |
_version_ |
1790603043611344896 |