Convergent evolution in toothed whale cochleae
Abstract Background Odontocetes (toothed whales) are the most species-rich marine mammal lineage. The catalyst for their evolutionary success is echolocation - a form of biological sonar that uses high-frequency sound, produced in the forehead and ultimately detected by the cochlea. The ubiquity of...
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ftdatacite:10.6084/m9.figshare.c.4713314.v1 2023-05-15T17:59:26+02:00 Convergent evolution in toothed whale cochleae Park, Travis Mennecart, Bastien Costeur, Loïc Grohé, Camille Cooper, Natalie 2019 https://dx.doi.org/10.6084/m9.figshare.c.4713314.v1 https://springernature.figshare.com/collections/Convergent_evolution_in_toothed_whale_cochleae/4713314/1 unknown figshare https://dx.doi.org/10.1186/s12862-019-1525-x https://dx.doi.org/10.6084/m9.figshare.c.4713314 CC BY 4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Biophysics Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Cancer Inorganic Chemistry FOS Chemical sciences Collection article 2019 ftdatacite https://doi.org/10.6084/m9.figshare.c.4713314.v1 https://doi.org/10.1186/s12862-019-1525-x https://doi.org/10.6084/m9.figshare.c.4713314 2021-11-05T12:55:41Z Abstract Background Odontocetes (toothed whales) are the most species-rich marine mammal lineage. The catalyst for their evolutionary success is echolocation - a form of biological sonar that uses high-frequency sound, produced in the forehead and ultimately detected by the cochlea. The ubiquity of echolocation in odontocetes across a wide range of physical and acoustic environments suggests that convergent evolution of cochlear shape is likely to have occurred. To test this, we used SURFACE; a method that fits Ornstein-Uhlenbeck (OU) models with stepwise AIC (Akaike Information Criterion) to identify convergent regimes on the odontocete phylogeny, and then tested whether convergence in these regimes was significantly greater than expected by chance. Results We identified three convergent regimes: (1) True’s (Mesoplodon mirus) and Cuvier’s (Ziphius cavirostris) beaked whales; (2) sperm whales (Physeter macrocephalus) and all other beaked whales sampled; and (3) pygmy (Kogia breviceps) and dwarf (Kogia sima) sperm whales and Dall’s porpoise (Phocoenoides dalli). Interestingly the ‘river dolphins’, a group notorious for their convergent morphologies and riverine ecologies, do not have convergent cochlear shapes. The first two regimes were significantly convergent, with habitat type and dive type significantly correlated with membership of the sperm whale + beaked whale regime. Conclusions The extreme acoustic environment of the deep ocean likely constrains cochlear shape, causing the cochlear morphology of sperm and beaked whales to converge. This study adds support for cochlear morphology being used to predict the ecology of extinct cetaceans. Article in Journal/Newspaper Physeter macrocephalus Sperm whale toothed whale toothed whales DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
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language |
unknown |
topic |
Biophysics Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Cancer Inorganic Chemistry FOS Chemical sciences |
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Biophysics Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Cancer Inorganic Chemistry FOS Chemical sciences Park, Travis Mennecart, Bastien Costeur, Loïc Grohé, Camille Cooper, Natalie Convergent evolution in toothed whale cochleae |
topic_facet |
Biophysics Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Cancer Inorganic Chemistry FOS Chemical sciences |
description |
Abstract Background Odontocetes (toothed whales) are the most species-rich marine mammal lineage. The catalyst for their evolutionary success is echolocation - a form of biological sonar that uses high-frequency sound, produced in the forehead and ultimately detected by the cochlea. The ubiquity of echolocation in odontocetes across a wide range of physical and acoustic environments suggests that convergent evolution of cochlear shape is likely to have occurred. To test this, we used SURFACE; a method that fits Ornstein-Uhlenbeck (OU) models with stepwise AIC (Akaike Information Criterion) to identify convergent regimes on the odontocete phylogeny, and then tested whether convergence in these regimes was significantly greater than expected by chance. Results We identified three convergent regimes: (1) True’s (Mesoplodon mirus) and Cuvier’s (Ziphius cavirostris) beaked whales; (2) sperm whales (Physeter macrocephalus) and all other beaked whales sampled; and (3) pygmy (Kogia breviceps) and dwarf (Kogia sima) sperm whales and Dall’s porpoise (Phocoenoides dalli). Interestingly the ‘river dolphins’, a group notorious for their convergent morphologies and riverine ecologies, do not have convergent cochlear shapes. The first two regimes were significantly convergent, with habitat type and dive type significantly correlated with membership of the sperm whale + beaked whale regime. Conclusions The extreme acoustic environment of the deep ocean likely constrains cochlear shape, causing the cochlear morphology of sperm and beaked whales to converge. This study adds support for cochlear morphology being used to predict the ecology of extinct cetaceans. |
format |
Article in Journal/Newspaper |
author |
Park, Travis Mennecart, Bastien Costeur, Loïc Grohé, Camille Cooper, Natalie |
author_facet |
Park, Travis Mennecart, Bastien Costeur, Loïc Grohé, Camille Cooper, Natalie |
author_sort |
Park, Travis |
title |
Convergent evolution in toothed whale cochleae |
title_short |
Convergent evolution in toothed whale cochleae |
title_full |
Convergent evolution in toothed whale cochleae |
title_fullStr |
Convergent evolution in toothed whale cochleae |
title_full_unstemmed |
Convergent evolution in toothed whale cochleae |
title_sort |
convergent evolution in toothed whale cochleae |
publisher |
figshare |
publishDate |
2019 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.4713314.v1 https://springernature.figshare.com/collections/Convergent_evolution_in_toothed_whale_cochleae/4713314/1 |
genre |
Physeter macrocephalus Sperm whale toothed whale toothed whales |
genre_facet |
Physeter macrocephalus Sperm whale toothed whale toothed whales |
op_relation |
https://dx.doi.org/10.1186/s12862-019-1525-x https://dx.doi.org/10.6084/m9.figshare.c.4713314 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.4713314.v1 https://doi.org/10.1186/s12862-019-1525-x https://doi.org/10.6084/m9.figshare.c.4713314 |
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