Description of cochlear morphology and hair cell variation in the beluga whale
Environmental change and decreased ice cover in the Arctic make new areas accessible to humans and animals. It is important to understand how these changes impact marine mammals, such as beluga whales (Delphinapterus leucas Pallas, 1776). Hearing is crucial in the daily lives of cetaceans. Consequen...
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Canadian Science Publishing
2018
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ftdoajarticles:oai:doaj.org/article:492afa3d165b424eaab67db9145f2921 2023-05-15T14:23:40+02:00 Description of cochlear morphology and hair cell variation in the beluga whale Cassandra D. Girdlestone Marina A. Piscitelli-Doshkov Sonja K. Ostertag Maria Morell Robert E. Shadwick 2018-09-01T00:00:00Z https://doi.org/10.1139/as-2017-0031 https://doaj.org/article/492afa3d165b424eaab67db9145f2921 EN FR eng fre Canadian Science Publishing https://doi.org/10.1139/as-2017-0031 https://doaj.org/toc/2368-7460 doi:10.1139/as-2017-0031 2368-7460 https://doaj.org/article/492afa3d165b424eaab67db9145f2921 Arctic Science, Vol 4, Iss 3, Pp 279-291 (2018) beluga (delphinapterus leucas) cochlea inner ear odontocetes organ of corti Environmental sciences GE1-350 Environmental engineering TA170-171 article 2018 ftdoajarticles https://doi.org/10.1139/as-2017-0031 2022-12-31T07:38:27Z Environmental change and decreased ice cover in the Arctic make new areas accessible to humans and animals. It is important to understand how these changes impact marine mammals, such as beluga whales (Delphinapterus leucas Pallas, 1776). Hearing is crucial in the daily lives of cetaceans. Consequently, we need normal baselines to further understand how anthropogenic noise affects these animals. Relatively little is known about the inner ear morphology of belugas, particularly the organ of Corti, or hearing organ, found within the cochlea. The base of the cochlea encodes for high-frequency sounds, while low frequencies are detected in the apex. We showed differences between the apex, or centremost point of the cochlea, and the base, the region closest to the stapes. Our results showed that average outer hair cell density changed from 148 cells/mm in the apex to 117 cells/mm in the base. Cell width varied between the two regions, from 5.8 µm in the apex to 8.4 µm in the base. These results revealed variation throughout the cochlea, and thus the need to understand the basic morphology, to give further insight on hearing function in belugas and allow us to recognize damage if or when we find it. Article in Journal/Newspaper Arctic Arctic Beluga Beluga whale Beluga* Delphinapterus leucas Directory of Open Access Journals: DOAJ Articles Arctic Arctic Science |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
beluga (delphinapterus leucas) cochlea inner ear odontocetes organ of corti Environmental sciences GE1-350 Environmental engineering TA170-171 |
spellingShingle |
beluga (delphinapterus leucas) cochlea inner ear odontocetes organ of corti Environmental sciences GE1-350 Environmental engineering TA170-171 Cassandra D. Girdlestone Marina A. Piscitelli-Doshkov Sonja K. Ostertag Maria Morell Robert E. Shadwick Description of cochlear morphology and hair cell variation in the beluga whale |
topic_facet |
beluga (delphinapterus leucas) cochlea inner ear odontocetes organ of corti Environmental sciences GE1-350 Environmental engineering TA170-171 |
description |
Environmental change and decreased ice cover in the Arctic make new areas accessible to humans and animals. It is important to understand how these changes impact marine mammals, such as beluga whales (Delphinapterus leucas Pallas, 1776). Hearing is crucial in the daily lives of cetaceans. Consequently, we need normal baselines to further understand how anthropogenic noise affects these animals. Relatively little is known about the inner ear morphology of belugas, particularly the organ of Corti, or hearing organ, found within the cochlea. The base of the cochlea encodes for high-frequency sounds, while low frequencies are detected in the apex. We showed differences between the apex, or centremost point of the cochlea, and the base, the region closest to the stapes. Our results showed that average outer hair cell density changed from 148 cells/mm in the apex to 117 cells/mm in the base. Cell width varied between the two regions, from 5.8 µm in the apex to 8.4 µm in the base. These results revealed variation throughout the cochlea, and thus the need to understand the basic morphology, to give further insight on hearing function in belugas and allow us to recognize damage if or when we find it. |
format |
Article in Journal/Newspaper |
author |
Cassandra D. Girdlestone Marina A. Piscitelli-Doshkov Sonja K. Ostertag Maria Morell Robert E. Shadwick |
author_facet |
Cassandra D. Girdlestone Marina A. Piscitelli-Doshkov Sonja K. Ostertag Maria Morell Robert E. Shadwick |
author_sort |
Cassandra D. Girdlestone |
title |
Description of cochlear morphology and hair cell variation in the beluga whale |
title_short |
Description of cochlear morphology and hair cell variation in the beluga whale |
title_full |
Description of cochlear morphology and hair cell variation in the beluga whale |
title_fullStr |
Description of cochlear morphology and hair cell variation in the beluga whale |
title_full_unstemmed |
Description of cochlear morphology and hair cell variation in the beluga whale |
title_sort |
description of cochlear morphology and hair cell variation in the beluga whale |
publisher |
Canadian Science Publishing |
publishDate |
2018 |
url |
https://doi.org/10.1139/as-2017-0031 https://doaj.org/article/492afa3d165b424eaab67db9145f2921 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Beluga Beluga whale Beluga* Delphinapterus leucas |
genre_facet |
Arctic Arctic Beluga Beluga whale Beluga* Delphinapterus leucas |
op_source |
Arctic Science, Vol 4, Iss 3, Pp 279-291 (2018) |
op_relation |
https://doi.org/10.1139/as-2017-0031 https://doaj.org/toc/2368-7460 doi:10.1139/as-2017-0031 2368-7460 https://doaj.org/article/492afa3d165b424eaab67db9145f2921 |
op_doi |
https://doi.org/10.1139/as-2017-0031 |
container_title |
Arctic Science |
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1766296161980776448 |