Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology
The large interspecific variation in marine mammal skull and dental morphology reflects ecological specialisations to foraging and communication. At the intraspecific level, the drivers of skull shape variation are less well understood, having implications for identifying putative local foraging ada...
Published in: | Zoology |
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Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2022
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Online Access: | https://pure.au.dk/portal/da/publications/rangewide-variation-in-grey-seal-halichoerus-grypus-skull-morphology(000b6ad1-517b-430e-bb9e-f05ded5605c9).html https://doi.org/10.1016/j.zool.2022.126023 https://pure.au.dk/ws/files/333407585/1_s2.0_S0944200622000241_main.pdf http://www.scopus.com/inward/record.url?scp=85132224291&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/000b6ad1-517b-430e-bb9e-f05ded5605c9 2023-08-27T04:11:08+02:00 Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology Galatius, Anders Svendsen, Michelle Strecker Messer, Dolores Valtonen, Mia McGowen, Michael Sabin, Richard Dahl, Vedrana Andersen Dahl, Anders Bjorholm Olsen, Morten Tange 2022-08 application/pdf https://pure.au.dk/portal/da/publications/rangewide-variation-in-grey-seal-halichoerus-grypus-skull-morphology(000b6ad1-517b-430e-bb9e-f05ded5605c9).html https://doi.org/10.1016/j.zool.2022.126023 https://pure.au.dk/ws/files/333407585/1_s2.0_S0944200622000241_main.pdf http://www.scopus.com/inward/record.url?scp=85132224291&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Galatius , A , Svendsen , M S , Messer , D , Valtonen , M , McGowen , M , Sabin , R , Dahl , V A , Dahl , A B & Olsen , M T 2022 , ' Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology ' , Zoology , vol. 153 , 126023 . https://doi.org/10.1016/j.zool.2022.126023 Foraging strategy Geometric morphometrics Intraspecific variation Populations Subspecies article 2022 ftuniaarhuspubl https://doi.org/10.1016/j.zool.2022.126023 2023-08-02T22:58:20Z The large interspecific variation in marine mammal skull and dental morphology reflects ecological specialisations to foraging and communication. At the intraspecific level, the drivers of skull shape variation are less well understood, having implications for identifying putative local foraging adaptations and delineating populations and subspecies for taxonomy, systematics, management and conservation. Here, we assess the range-wide intraspecific variation in 71 grey seal skulls by 3D surface scanning, collection of cranial landmarks and geometric morphometric analysis. We find that skull shape differs slightly between populations in the Northwest Atlantic, Northeast Atlantic and Baltic Sea. However, there was a large shape overlap between populations and variation was substantially larger among animals within populations than between. We hypothesize that this pattern of intraspecific variation in grey seal skull shape results from balancing selection or phenotypic plasticity allowing for a remarkably generalist foraging behaviour. Moreover, the large overlap in skull shape between populations implies that the separate subspecies status of Atlantic and Baltic Sea grey seals is questionable from a morphological point of view. Article in Journal/Newspaper Northeast Atlantic Northwest Atlantic Aarhus University: Research Zoology 153 126023 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Foraging strategy Geometric morphometrics Intraspecific variation Populations Subspecies |
spellingShingle |
Foraging strategy Geometric morphometrics Intraspecific variation Populations Subspecies Galatius, Anders Svendsen, Michelle Strecker Messer, Dolores Valtonen, Mia McGowen, Michael Sabin, Richard Dahl, Vedrana Andersen Dahl, Anders Bjorholm Olsen, Morten Tange Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology |
topic_facet |
Foraging strategy Geometric morphometrics Intraspecific variation Populations Subspecies |
description |
The large interspecific variation in marine mammal skull and dental morphology reflects ecological specialisations to foraging and communication. At the intraspecific level, the drivers of skull shape variation are less well understood, having implications for identifying putative local foraging adaptations and delineating populations and subspecies for taxonomy, systematics, management and conservation. Here, we assess the range-wide intraspecific variation in 71 grey seal skulls by 3D surface scanning, collection of cranial landmarks and geometric morphometric analysis. We find that skull shape differs slightly between populations in the Northwest Atlantic, Northeast Atlantic and Baltic Sea. However, there was a large shape overlap between populations and variation was substantially larger among animals within populations than between. We hypothesize that this pattern of intraspecific variation in grey seal skull shape results from balancing selection or phenotypic plasticity allowing for a remarkably generalist foraging behaviour. Moreover, the large overlap in skull shape between populations implies that the separate subspecies status of Atlantic and Baltic Sea grey seals is questionable from a morphological point of view. |
format |
Article in Journal/Newspaper |
author |
Galatius, Anders Svendsen, Michelle Strecker Messer, Dolores Valtonen, Mia McGowen, Michael Sabin, Richard Dahl, Vedrana Andersen Dahl, Anders Bjorholm Olsen, Morten Tange |
author_facet |
Galatius, Anders Svendsen, Michelle Strecker Messer, Dolores Valtonen, Mia McGowen, Michael Sabin, Richard Dahl, Vedrana Andersen Dahl, Anders Bjorholm Olsen, Morten Tange |
author_sort |
Galatius, Anders |
title |
Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology |
title_short |
Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology |
title_full |
Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology |
title_fullStr |
Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology |
title_full_unstemmed |
Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology |
title_sort |
range-wide variation in grey seal ( halichoerus grypus ) skull morphology |
publishDate |
2022 |
url |
https://pure.au.dk/portal/da/publications/rangewide-variation-in-grey-seal-halichoerus-grypus-skull-morphology(000b6ad1-517b-430e-bb9e-f05ded5605c9).html https://doi.org/10.1016/j.zool.2022.126023 https://pure.au.dk/ws/files/333407585/1_s2.0_S0944200622000241_main.pdf http://www.scopus.com/inward/record.url?scp=85132224291&partnerID=8YFLogxK |
genre |
Northeast Atlantic Northwest Atlantic |
genre_facet |
Northeast Atlantic Northwest Atlantic |
op_source |
Galatius , A , Svendsen , M S , Messer , D , Valtonen , M , McGowen , M , Sabin , R , Dahl , V A , Dahl , A B & Olsen , M T 2022 , ' Range-wide variation in grey seal ( Halichoerus grypus ) skull morphology ' , Zoology , vol. 153 , 126023 . https://doi.org/10.1016/j.zool.2022.126023 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.zool.2022.126023 |
container_title |
Zoology |
container_volume |
153 |
container_start_page |
126023 |
_version_ |
1775353646794407936 |