Evolution of cetacean backbone in light of phylogenetic and ecological constraints
editorial reviewed With approximately 90 living species, whales, dolphins and porpoises represent the most diverse clade of extant marine tetrapods. This high level of taxonomic diversity has been often related to ocean restructuring that resulted in an explosive radiation of oceanic dolphins within...
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Online Access: | https://orbi.uliege.be/handle/2268/238522 https://doi.org/10.1002/jmor.21003 |
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ftorbi:oai:orbi.ulg.ac.be:2268/238522 2024-10-13T14:06:16+00:00 Evolution of cetacean backbone in light of phylogenetic and ecological constraints Gillet, Amandine Frederich, Bruno Parmentier, Eric FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège 2019-07-22 https://orbi.uliege.be/handle/2268/238522 https://doi.org/10.1002/jmor.21003 en eng https://orbi.uliege.be/handle/2268/238522 info:hdl:2268/238522 doi:10.1002/jmor.21003 info:pmid:31157460 restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess 12th International Congress of Vertebrate Morphology, Prague, Czechia [CZ], from 21-07-2019 to 25-07-2019 Vertebral column Ecomorphology Phylogenetic comparative methods Marine Mammals Life sciences Zoology Sciences du vivant Zoologie conference paper not in proceedings http://purl.org/coar/resource_type/c_18cp info:eu-repo/semantics/conferencePaper editorial reviewed 2019 ftorbi https://doi.org/10.1002/jmor.21003 2024-09-27T07:01:40Z editorial reviewed With approximately 90 living species, whales, dolphins and porpoises represent the most diverse clade of extant marine tetrapods. This high level of taxonomic diversity has been often related to ocean restructuring that resulted in an explosive radiation of oceanic dolphins within the past 10 Ma. However, this hypothesis does not entirely explain how organisms have faced environmental constraints suggesting other factors could also explain this burst of diversification. In marine taxa such as sharks and ichthyosaurs, morphological variations have been linked to several life-styles which have sustained their diversification in different adaptive zones. The aim of our study is to establish the relationship between the morphology of the axial skeleton of cetaceans, their ecology and their diversification. By combining the most extensive morphological dataset describing the axial skeleton of 73 cetacean species with cutting-edge phylogenetic comparative methods, we demonstrate that extant cetaceans have followed two distinct evolutionary pathways in relation to their ecology. Most oceanic species evolved towards an increased body size leading to gigantism in baleen whales. Interestingly, dolphins have evolved another way. While riverine and coastal species exhibit a small body size, lengthened vertebrae and a low vertebral count, small oceanic dolphins show an extremely high number of short vertebrae. We discuss how these modifications have operated as key innovations that contributed to the explosive radiation of dolphins. Conference Object baleen whales University of Liège: ORBi (Open Repository and Bibliography) Journal of Morphology 280 S1 S1 S244 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Vertebral column Ecomorphology Phylogenetic comparative methods Marine Mammals Life sciences Zoology Sciences du vivant Zoologie |
spellingShingle |
Vertebral column Ecomorphology Phylogenetic comparative methods Marine Mammals Life sciences Zoology Sciences du vivant Zoologie Gillet, Amandine Frederich, Bruno Parmentier, Eric Evolution of cetacean backbone in light of phylogenetic and ecological constraints |
topic_facet |
Vertebral column Ecomorphology Phylogenetic comparative methods Marine Mammals Life sciences Zoology Sciences du vivant Zoologie |
description |
editorial reviewed With approximately 90 living species, whales, dolphins and porpoises represent the most diverse clade of extant marine tetrapods. This high level of taxonomic diversity has been often related to ocean restructuring that resulted in an explosive radiation of oceanic dolphins within the past 10 Ma. However, this hypothesis does not entirely explain how organisms have faced environmental constraints suggesting other factors could also explain this burst of diversification. In marine taxa such as sharks and ichthyosaurs, morphological variations have been linked to several life-styles which have sustained their diversification in different adaptive zones. The aim of our study is to establish the relationship between the morphology of the axial skeleton of cetaceans, their ecology and their diversification. By combining the most extensive morphological dataset describing the axial skeleton of 73 cetacean species with cutting-edge phylogenetic comparative methods, we demonstrate that extant cetaceans have followed two distinct evolutionary pathways in relation to their ecology. Most oceanic species evolved towards an increased body size leading to gigantism in baleen whales. Interestingly, dolphins have evolved another way. While riverine and coastal species exhibit a small body size, lengthened vertebrae and a low vertebral count, small oceanic dolphins show an extremely high number of short vertebrae. We discuss how these modifications have operated as key innovations that contributed to the explosive radiation of dolphins. |
author2 |
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège |
format |
Conference Object |
author |
Gillet, Amandine Frederich, Bruno Parmentier, Eric |
author_facet |
Gillet, Amandine Frederich, Bruno Parmentier, Eric |
author_sort |
Gillet, Amandine |
title |
Evolution of cetacean backbone in light of phylogenetic and ecological constraints |
title_short |
Evolution of cetacean backbone in light of phylogenetic and ecological constraints |
title_full |
Evolution of cetacean backbone in light of phylogenetic and ecological constraints |
title_fullStr |
Evolution of cetacean backbone in light of phylogenetic and ecological constraints |
title_full_unstemmed |
Evolution of cetacean backbone in light of phylogenetic and ecological constraints |
title_sort |
evolution of cetacean backbone in light of phylogenetic and ecological constraints |
publishDate |
2019 |
url |
https://orbi.uliege.be/handle/2268/238522 https://doi.org/10.1002/jmor.21003 |
genre |
baleen whales |
genre_facet |
baleen whales |
op_source |
12th International Congress of Vertebrate Morphology, Prague, Czechia [CZ], from 21-07-2019 to 25-07-2019 |
op_relation |
https://orbi.uliege.be/handle/2268/238522 info:hdl:2268/238522 doi:10.1002/jmor.21003 info:pmid:31157460 |
op_rights |
restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/jmor.21003 |
container_title |
Journal of Morphology |
container_volume |
280 |
container_issue |
S1 |
container_start_page |
S1 |
op_container_end_page |
S244 |
_version_ |
1812812328858550272 |