Diving physiology in marine mammals : significant findings in pinniped muscle physiology and trachea morphology.
The muscular biochemistry and respiratory morphology of diving mammals are closely intertwined through the utilization and allocation of inspired oxygen for metabolism. Marine mammal physiological mechanisms and adaptations are of great intrigue due to the heightened environmental pressures that the...
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ftbayloruniv:oai:baylor-ir.tdl.org:2104/9178 2023-05-15T16:05:18+02:00 Diving physiology in marine mammals : significant findings in pinniped muscle physiology and trachea morphology. Moore, Colby D. Trumble, Stephen John. Biology. Baylor University. Dept. of Biology. 2014-09-05T14:06:53Z application/pdf http://hdl.handle.net/2104/9178 en_US eng Moore, C. D., Crocker, D. E., Fahlman, A., Moore, M. J., Willoughby, D. S., Robbins, K. A., Kanatous, S. B., Trumble, S. J. "Ontogenetic changes in skeletal muscle fiber type, fiber diameter and myoglobin concentration in the Northern elephant seal (Mirounga angustirostris)." Frontiers in Physiology 5 (2014): 217. http://hdl.handle.net/2104/9178 Baylor University theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact librarywebmaster@baylor.edu for inquiries about permission. Worldwide access. Access changed 1/27/17. Marine mammals Diving physiology Thesis 2014 ftbayloruniv 2022-09-05T17:33:14Z The muscular biochemistry and respiratory morphology of diving mammals are closely intertwined through the utilization and allocation of inspired oxygen for metabolism. Marine mammal physiological mechanisms and adaptations are of great intrigue due to the heightened environmental pressures that these animals are routinely subjected. These species also experience varying degrees of ischemia, hypoxemia and gas tissue saturation, which are pathological in terrestrial mammals. Data included in this dissertation suggest a unique skeletal muscle fiber type profile for the deep-diving Northern elephant seal; a profile predominately comprised of enlarged aerobic type I myofibers. In addition, enzymatic data suggest that diving mammals maintain higher levels of aerobic enzymes in primary locomotory muscle and that muscle-based enzymes degrade rapidly and variably with temperature and time. Histological analysis of harbor seal tracheal rings microscopically describes a unique continuity of cartilage that correlates with lung compression, depth at which lungs collapse, as well as maximum dive depth. Cumulatively, biochemical and structural adaptations allow diving mammals to reach extensive depth, while maintaining homeostatic levels of on-board gasses and avoiding dive-related injury. Ultimately, this research highlights the relationship between morphology, physiology and life history of these animals. Ph.D. Thesis Elephant Seal harbor seal Baylor University: BEARdocs |
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Baylor University: BEARdocs |
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English |
topic |
Marine mammals Diving physiology |
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Marine mammals Diving physiology Moore, Colby D. Diving physiology in marine mammals : significant findings in pinniped muscle physiology and trachea morphology. |
topic_facet |
Marine mammals Diving physiology |
description |
The muscular biochemistry and respiratory morphology of diving mammals are closely intertwined through the utilization and allocation of inspired oxygen for metabolism. Marine mammal physiological mechanisms and adaptations are of great intrigue due to the heightened environmental pressures that these animals are routinely subjected. These species also experience varying degrees of ischemia, hypoxemia and gas tissue saturation, which are pathological in terrestrial mammals. Data included in this dissertation suggest a unique skeletal muscle fiber type profile for the deep-diving Northern elephant seal; a profile predominately comprised of enlarged aerobic type I myofibers. In addition, enzymatic data suggest that diving mammals maintain higher levels of aerobic enzymes in primary locomotory muscle and that muscle-based enzymes degrade rapidly and variably with temperature and time. Histological analysis of harbor seal tracheal rings microscopically describes a unique continuity of cartilage that correlates with lung compression, depth at which lungs collapse, as well as maximum dive depth. Cumulatively, biochemical and structural adaptations allow diving mammals to reach extensive depth, while maintaining homeostatic levels of on-board gasses and avoiding dive-related injury. Ultimately, this research highlights the relationship between morphology, physiology and life history of these animals. Ph.D. |
author2 |
Trumble, Stephen John. Biology. Baylor University. Dept. of Biology. |
format |
Thesis |
author |
Moore, Colby D. |
author_facet |
Moore, Colby D. |
author_sort |
Moore, Colby D. |
title |
Diving physiology in marine mammals : significant findings in pinniped muscle physiology and trachea morphology. |
title_short |
Diving physiology in marine mammals : significant findings in pinniped muscle physiology and trachea morphology. |
title_full |
Diving physiology in marine mammals : significant findings in pinniped muscle physiology and trachea morphology. |
title_fullStr |
Diving physiology in marine mammals : significant findings in pinniped muscle physiology and trachea morphology. |
title_full_unstemmed |
Diving physiology in marine mammals : significant findings in pinniped muscle physiology and trachea morphology. |
title_sort |
diving physiology in marine mammals : significant findings in pinniped muscle physiology and trachea morphology. |
publishDate |
2014 |
url |
http://hdl.handle.net/2104/9178 |
genre |
Elephant Seal harbor seal |
genre_facet |
Elephant Seal harbor seal |
op_relation |
Moore, C. D., Crocker, D. E., Fahlman, A., Moore, M. J., Willoughby, D. S., Robbins, K. A., Kanatous, S. B., Trumble, S. J. "Ontogenetic changes in skeletal muscle fiber type, fiber diameter and myoglobin concentration in the Northern elephant seal (Mirounga angustirostris)." Frontiers in Physiology 5 (2014): 217. http://hdl.handle.net/2104/9178 |
op_rights |
Baylor University theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact librarywebmaster@baylor.edu for inquiries about permission. Worldwide access. Access changed 1/27/17. |
_version_ |
1766401203597475840 |