Avian egg collections: museum collection bias driven by shape and size
Avian eggs exhibit substantial intra‐ and interspecific variation in shape, size and colour. Considerable efforts have been made to better understand the evolutionary drivers behind such variation, often using museum egg collections. Usually it is assumed that museum collections accurately represent...
Published in: | Journal of Avian Biology |
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crwiley:10.1111/jav.02507 2024-03-31T07:47:55+00:00 Avian egg collections: museum collection bias driven by shape and size Thompson, Jamie E. Birkhead, Tim R. 2020 http://dx.doi.org/10.1111/jav.02507 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjav.02507 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jav.02507 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jav.02507 en eng Wiley http://creativecommons.org/licenses/by/3.0/ Journal of Avian Biology volume 51, issue 8 ISSN 0908-8857 1600-048X Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2020 crwiley https://doi.org/10.1111/jav.02507 2024-03-05T05:45:51Z Avian eggs exhibit substantial intra‐ and interspecific variation in shape, size and colour. Considerable efforts have been made to better understand the evolutionary drivers behind such variation, often using museum egg collections. Usually it is assumed that museum collections accurately represent the variation seen in natural populations, but this may not be the case if there is collection bias. Collection bias may lead to the over‐representation of certain egg traits in collections, due to the aesthetic (or other) preferences of collectors. The aim of this study is to begin to look for the occurrence of potential collection bias in museum egg collections by comparing three shape indices (pointedness/asymmetry, elongation and polar asymmetry) and egg volume between subsets of eggs in museum collections with those of recently sampled eggs in the field for three different bird species: common guillemot Uria aalge , razorbill Alca torda and northern fulmar Fulmarus glacialis . We found no evidence of collection bias in our sampled razorbill and northern fulmar museum collection eggs, but some evidence for a bias in sampled museum collection eggs of common guillemots. Since the guillemot's egg differs from most bird eggs in being pyriform, we suggest that collection bias by historic egg collectors may be more prevalent in species with extreme egg traits. Researchers using museum egg collections to examine questions relating to egg shape should be aware of collection bias risks and consider how to minimise the effect of these possible biases on accumulated datasets. Article in Journal/Newspaper Alca torda common guillemot Fulmarus glacialis Northern Fulmar Razorbill Uria aalge uria Wiley Online Library Fulmar ENVELOPE(-46.016,-46.016,-60.616,-60.616) Journal of Avian Biology 51 8 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Thompson, Jamie E. Birkhead, Tim R. Avian egg collections: museum collection bias driven by shape and size |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Avian eggs exhibit substantial intra‐ and interspecific variation in shape, size and colour. Considerable efforts have been made to better understand the evolutionary drivers behind such variation, often using museum egg collections. Usually it is assumed that museum collections accurately represent the variation seen in natural populations, but this may not be the case if there is collection bias. Collection bias may lead to the over‐representation of certain egg traits in collections, due to the aesthetic (or other) preferences of collectors. The aim of this study is to begin to look for the occurrence of potential collection bias in museum egg collections by comparing three shape indices (pointedness/asymmetry, elongation and polar asymmetry) and egg volume between subsets of eggs in museum collections with those of recently sampled eggs in the field for three different bird species: common guillemot Uria aalge , razorbill Alca torda and northern fulmar Fulmarus glacialis . We found no evidence of collection bias in our sampled razorbill and northern fulmar museum collection eggs, but some evidence for a bias in sampled museum collection eggs of common guillemots. Since the guillemot's egg differs from most bird eggs in being pyriform, we suggest that collection bias by historic egg collectors may be more prevalent in species with extreme egg traits. Researchers using museum egg collections to examine questions relating to egg shape should be aware of collection bias risks and consider how to minimise the effect of these possible biases on accumulated datasets. |
format |
Article in Journal/Newspaper |
author |
Thompson, Jamie E. Birkhead, Tim R. |
author_facet |
Thompson, Jamie E. Birkhead, Tim R. |
author_sort |
Thompson, Jamie E. |
title |
Avian egg collections: museum collection bias driven by shape and size |
title_short |
Avian egg collections: museum collection bias driven by shape and size |
title_full |
Avian egg collections: museum collection bias driven by shape and size |
title_fullStr |
Avian egg collections: museum collection bias driven by shape and size |
title_full_unstemmed |
Avian egg collections: museum collection bias driven by shape and size |
title_sort |
avian egg collections: museum collection bias driven by shape and size |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/jav.02507 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjav.02507 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jav.02507 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jav.02507 |
long_lat |
ENVELOPE(-46.016,-46.016,-60.616,-60.616) |
geographic |
Fulmar |
geographic_facet |
Fulmar |
genre |
Alca torda common guillemot Fulmarus glacialis Northern Fulmar Razorbill Uria aalge uria |
genre_facet |
Alca torda common guillemot Fulmarus glacialis Northern Fulmar Razorbill Uria aalge uria |
op_source |
Journal of Avian Biology volume 51, issue 8 ISSN 0908-8857 1600-048X |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.1111/jav.02507 |
container_title |
Journal of Avian Biology |
container_volume |
51 |
container_issue |
8 |
_version_ |
1795038304409747456 |