Sexual Size Dimorphism and Bohemian Waxwings, Bombycilla garrulus
Sexual size dimorphism is common among birds, with males generally being larger than females. Sexual size dimorphism is typically more extreme in polygynous species; socially monogamous males are typically only 5% larger than females. However, cryptic sexual size dimorphism has been found in some so...
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ftjcfn:oai:canadianfieldnaturalist.ca:article/695 2023-05-15T15:45:29+02:00 Sexual Size Dimorphism and Bohemian Waxwings, Bombycilla garrulus Ludlow, Sarah M. 2009-04-01 application/pdf https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/695 https://doi.org/10.22621/cfn.v123i2.695 eng eng The Ottawa Field-Naturalists' Club https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/695/695 https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/695 doi:10.22621/cfn.v123i2.695 The Canadian Field-Naturalist; Vol. 123 No. 2 (2009); 165-167 0008-3550 Bohemian Waxwing Bombycilla garrulus sexual size dimorphism Saskatchewan info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Short Article 2009 ftjcfn https://doi.org/10.22621/cfn.v123i2.695 2021-09-02T18:54:00Z Sexual size dimorphism is common among birds, with males generally being larger than females. Sexual size dimorphism is typically more extreme in polygynous species; socially monogamous males are typically only 5% larger than females. However, cryptic sexual size dimorphism has been found in some socially monogamous species. I used standard external measurements as well as two internal measurements (keel length and pectoral muscle mass) to determine whether, or to what extent, Bohemian Waxwings (Bombycilla garrulus) exhibit sexual size dimorphism. Males were only slightly larger than females in all of the characters measured except keel and tarsus length. Keel and tarsus length were 0.6% and 1% longer, respectively, in females than in males. The similar size exhibited by males and females may be related to the amount of parental care provided by males. Smaller body size in males may reflect a trade-off between selection for increased male size and energetic constraints imposed by parental care. Article in Journal/Newspaper Bohemian Waxwing Bombycilla garrulus The Canadian Field-Naturalist (E-Journal) The Canadian Field-Naturalist 123 2 165 |
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Open Polar |
collection |
The Canadian Field-Naturalist (E-Journal) |
op_collection_id |
ftjcfn |
language |
English |
topic |
Bohemian Waxwing Bombycilla garrulus sexual size dimorphism Saskatchewan |
spellingShingle |
Bohemian Waxwing Bombycilla garrulus sexual size dimorphism Saskatchewan Ludlow, Sarah M. Sexual Size Dimorphism and Bohemian Waxwings, Bombycilla garrulus |
topic_facet |
Bohemian Waxwing Bombycilla garrulus sexual size dimorphism Saskatchewan |
description |
Sexual size dimorphism is common among birds, with males generally being larger than females. Sexual size dimorphism is typically more extreme in polygynous species; socially monogamous males are typically only 5% larger than females. However, cryptic sexual size dimorphism has been found in some socially monogamous species. I used standard external measurements as well as two internal measurements (keel length and pectoral muscle mass) to determine whether, or to what extent, Bohemian Waxwings (Bombycilla garrulus) exhibit sexual size dimorphism. Males were only slightly larger than females in all of the characters measured except keel and tarsus length. Keel and tarsus length were 0.6% and 1% longer, respectively, in females than in males. The similar size exhibited by males and females may be related to the amount of parental care provided by males. Smaller body size in males may reflect a trade-off between selection for increased male size and energetic constraints imposed by parental care. |
format |
Article in Journal/Newspaper |
author |
Ludlow, Sarah M. |
author_facet |
Ludlow, Sarah M. |
author_sort |
Ludlow, Sarah M. |
title |
Sexual Size Dimorphism and Bohemian Waxwings, Bombycilla garrulus |
title_short |
Sexual Size Dimorphism and Bohemian Waxwings, Bombycilla garrulus |
title_full |
Sexual Size Dimorphism and Bohemian Waxwings, Bombycilla garrulus |
title_fullStr |
Sexual Size Dimorphism and Bohemian Waxwings, Bombycilla garrulus |
title_full_unstemmed |
Sexual Size Dimorphism and Bohemian Waxwings, Bombycilla garrulus |
title_sort |
sexual size dimorphism and bohemian waxwings, bombycilla garrulus |
publisher |
The Ottawa Field-Naturalists' Club |
publishDate |
2009 |
url |
https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/695 https://doi.org/10.22621/cfn.v123i2.695 |
genre |
Bohemian Waxwing Bombycilla garrulus |
genre_facet |
Bohemian Waxwing Bombycilla garrulus |
op_source |
The Canadian Field-Naturalist; Vol. 123 No. 2 (2009); 165-167 0008-3550 |
op_relation |
https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/695/695 https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/695 doi:10.22621/cfn.v123i2.695 |
op_doi |
https://doi.org/10.22621/cfn.v123i2.695 |
container_title |
The Canadian Field-Naturalist |
container_volume |
123 |
container_issue |
2 |
container_start_page |
165 |
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1766379898634502144 |