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Lanzetti A, Crouch N, Portela Miguez R, Fernandez V, Goswami A. Developing echolocation: distinctive patterns in the ontogeny of the tympanoperiotic complex in baleen and toothed whales (Cetacea). Biol J Linn Soc Lond 2021. [DOI: 10.1093/biolinnean/blab160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Cetaceans (baleen and toothed whales) present a unique set of adaptations for life in water. Among other abilities, the two living groups can hear and produce different sound frequencies: baleen whales use low frequencies primarily for communication, whereas toothed whales acquired the ability to echolocate using high-frequency sounds. Both groups exhibit modifications to the morphology of the ear bones (tympanic bulla and periotic) that closely track their behaviour and ecology. The evolution of sound reception in whales is being investigated thoroughly, whereas the changes in prenatal development (ontogeny) that generate these disparate ear bone morphologies remain mostly unknown. In this study, we characterize the ontogeny of the ear bones in Cetacea by looking at the progression of ossification and associated changes in morphology using a combination of traditional measurements and an innovative landmark-free method to quantify shape on a newly assembled three-dimensional dataset spanning the ontogeny and phylogeny of extant Cetacea. We have found that the two groups of Cetacea share some aspects of ear ontogeny, such as a common growth trajectory of the periotic. However, differences in ossification, allometry and growth trajectory, particularly in the periotic bone, reflect their divergent inner ear morphology and hearing abilities.
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Affiliation(s)
- Agnese Lanzetti
- Department of Life Sciences, Natural History Museum, Cromwell Road, Kensington, London, UK
| | - Natasha Crouch
- Department of Life Sciences, Natural History Museum, Cromwell Road, Kensington, London, UK
| | - Roberto Portela Miguez
- Department of Life Sciences, Natural History Museum, Cromwell Road, Kensington, London, UK
| | - Vincent Fernandez
- Imaging and Analysis Centre, Natural History Museum, Cromwell Road, Kensington, London, UK
| | - Anjali Goswami
- Department of Life Sciences, Natural History Museum, Cromwell Road, Kensington, London, UK
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Kuroda M, Miki N, Matsuishi TF. Determinants of echolocation click frequency characteristics in small toothed whales: recent advances from anatomical information. Mamm Rev 2020. [DOI: 10.1111/mam.12212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Mika Kuroda
- Faculty of Fisheries Sciences Hokkaido University 3‐1‐1 Minato‐cho Hakodate Hokkaido041‐8611Japan
| | - Nobuhiro Miki
- Future University Hakodate 116‐2 Kamedanakano‐cho Hakodate Hokkaido041‐8655Japan
| | - Takashi Fritz Matsuishi
- Faculty of Fisheries Sciences Hokkaido University 3‐1‐1 Minato‐cho Hakodate Hokkaido041‐8611Japan
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