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dc.contributor.authorDenk, Michael  Concept link
dc.contributor.authorFahlman, Andreas  Concept link
dc.contributor.authorDennison-Gibby, Sophie  Concept link
dc.contributor.authorSong, Zhongchang  Concept link
dc.contributor.authorMoore, Michael J.  Concept link
dc.date.accessioned2020-03-24T15:12:43Z
dc.date.available2021-04-01T15:55:54Z
dc.date.issued2020-02-10
dc.identifier.citationDenk, M. A., Fahlman, A., Dennison-Gibby, S., Song, Z., & Moore, M. (2020). Hyperbaric tracheobronchial compression in cetaceans and pinnipeds. Journal of Experimental Biology, 223, jeb217885.en_US
dc.identifier.urihttps://hdl.handle.net/1912/25566
dc.descriptionAuthor Posting. © Company of Biologists, 2020. This article is posted here by permission of Company of Biologists for personal use, not for redistribution. The definitive version was published in Journal of Experimental Biology 223 (2020): jeb217885, doi:10.1242/jeb.217885.en_US
dc.description.abstractAssessment of the compressibility of marine mammal airways at depth is crucial to understanding vital physiological processes such as gas exchange during diving. Very few studies have directly assessed changes in cetacean and pinniped tracheobronchial shape, and none have quantified changes in volume with increasing pressure. A harbor seal, gray seal, harp seal, harbor porpoise and common dolphin were imaged promptly post mortem via computed tomography in a radiolucent hyperbaric chamber. Volume reconstructions were performed of segments of the trachea and bronchi of the pinnipeds and bronchi of the cetaceans for each pressure treatment. All specimens examined demonstrated significant decreases in airway volume with increasing pressure, with those of the harbor seal and common dolphin nearing complete collapse at the highest pressures. The common dolphin bronchi demonstrated distinctly different compression dynamics between 50% and 100% lung inflation treatments, indicating the importance of air in maintaining patent airways, and collapse occurred caudally to cranially in the 50% treatment. Dynamics of the harbor seal and gray seal airways indicated that the trachea was less compliant than the bronchi. These findings indicate potential species-specific variability in airway compliance, and cessation of gas exchange may occur at greater depths than those predicted in models assuming rigid airways. This may potentially increase the likelihood of decompression sickness in these animals during diving.en_US
dc.description.sponsorshipThis research received no specific grant from any funding agency in the public, commercial or not-for-profit sectors.en_US
dc.publisherCompany of Biologistsen_US
dc.relation.urihttps://doi.org/10.1242/jeb.217885
dc.subjectComputed tomographyen_US
dc.subjectMarine mammalen_US
dc.subjectTracheaen_US
dc.subjectBronchien_US
dc.subjectAirway compressionen_US
dc.titleHyperbaric tracheobronchial compression in cetaceans and pinnipedsen_US
dc.typeArticleen_US
dc.description.embargo2021-02-10en_US
dc.identifier.doi10.1242/jeb.217885


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