A comparative analysis of marine mammal tracheas
In 1940, Scholander suggested that stiffened upper airways remained open and received air from highly compressible alveoli during marine mammal diving. There are few data available on the structural and functional adaptations of the marine mammal respiratory system. The aim of this research was to i...
Published in: | Journal of Experimental Biology |
---|---|
Main Authors: | , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Company of Biologists
2014
|
Subjects: | |
Online Access: | http://jeb.biologists.org/cgi/content/short/217/7/1154 https://doi.org/10.1242/jeb.093146 |
id |
fthighwire:oai:open-archive.highwire.org:jexbio:217/7/1154 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:jexbio:217/7/1154 2023-05-15T16:33:08+02:00 A comparative analysis of marine mammal tracheas Moore, Colby Moore, Michael Trumble, Stephen Niemeyer, Misty Lentell, Betty McLellan, William Costidis, Alexander Fahlman, Andreas 2014-04-01 00:00:00.0 text/html http://jeb.biologists.org/cgi/content/short/217/7/1154 https://doi.org/10.1242/jeb.093146 en eng Company of Biologists http://jeb.biologists.org/cgi/content/short/217/7/1154 http://dx.doi.org/10.1242/jeb.093146 Copyright (C) 2014, Company of Biologists RESEARCH ARTICLES TEXT 2014 fthighwire https://doi.org/10.1242/jeb.093146 2015-03-01T01:18:56Z In 1940, Scholander suggested that stiffened upper airways remained open and received air from highly compressible alveoli during marine mammal diving. There are few data available on the structural and functional adaptations of the marine mammal respiratory system. The aim of this research was to investigate the anatomical (gross) and structural (compliance) characteristics of excised marine mammal tracheas. Here, we defined different types of tracheal structures, categorizing pinniped tracheas by varying degrees of continuity of cartilage (categories 1–4) and cetacean tracheas by varying compliance values (categories 5A and 5B). Some tracheas fell into more than one category along their length; for example, the harbor seal ( Phoca vitulina ) demonstrated complete rings cranially, and as the trachea progressed caudally, tracheal rings changed morphology. Dolphins and porpoises had less stiff, more compliant spiraling rings while beaked whales had very stiff, less compliant spiraling rings. The pressure–volume ( P – V ) relationships of isolated tracheas from different species were measured to assess structural differences between species. These findings lend evidence for pressure-induced collapse and re-inflation of lungs, perhaps influencing variability in dive depth or ventilation rates of the species investigated. Text harbor seal Phoca vitulina HighWire Press (Stanford University) Scholander ENVELOPE(-66.954,-66.954,-66.365,-66.365) Journal of Experimental Biology |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
RESEARCH ARTICLES |
spellingShingle |
RESEARCH ARTICLES Moore, Colby Moore, Michael Trumble, Stephen Niemeyer, Misty Lentell, Betty McLellan, William Costidis, Alexander Fahlman, Andreas A comparative analysis of marine mammal tracheas |
topic_facet |
RESEARCH ARTICLES |
description |
In 1940, Scholander suggested that stiffened upper airways remained open and received air from highly compressible alveoli during marine mammal diving. There are few data available on the structural and functional adaptations of the marine mammal respiratory system. The aim of this research was to investigate the anatomical (gross) and structural (compliance) characteristics of excised marine mammal tracheas. Here, we defined different types of tracheal structures, categorizing pinniped tracheas by varying degrees of continuity of cartilage (categories 1–4) and cetacean tracheas by varying compliance values (categories 5A and 5B). Some tracheas fell into more than one category along their length; for example, the harbor seal ( Phoca vitulina ) demonstrated complete rings cranially, and as the trachea progressed caudally, tracheal rings changed morphology. Dolphins and porpoises had less stiff, more compliant spiraling rings while beaked whales had very stiff, less compliant spiraling rings. The pressure–volume ( P – V ) relationships of isolated tracheas from different species were measured to assess structural differences between species. These findings lend evidence for pressure-induced collapse and re-inflation of lungs, perhaps influencing variability in dive depth or ventilation rates of the species investigated. |
format |
Text |
author |
Moore, Colby Moore, Michael Trumble, Stephen Niemeyer, Misty Lentell, Betty McLellan, William Costidis, Alexander Fahlman, Andreas |
author_facet |
Moore, Colby Moore, Michael Trumble, Stephen Niemeyer, Misty Lentell, Betty McLellan, William Costidis, Alexander Fahlman, Andreas |
author_sort |
Moore, Colby |
title |
A comparative analysis of marine mammal tracheas |
title_short |
A comparative analysis of marine mammal tracheas |
title_full |
A comparative analysis of marine mammal tracheas |
title_fullStr |
A comparative analysis of marine mammal tracheas |
title_full_unstemmed |
A comparative analysis of marine mammal tracheas |
title_sort |
comparative analysis of marine mammal tracheas |
publisher |
Company of Biologists |
publishDate |
2014 |
url |
http://jeb.biologists.org/cgi/content/short/217/7/1154 https://doi.org/10.1242/jeb.093146 |
long_lat |
ENVELOPE(-66.954,-66.954,-66.365,-66.365) |
geographic |
Scholander |
geographic_facet |
Scholander |
genre |
harbor seal Phoca vitulina |
genre_facet |
harbor seal Phoca vitulina |
op_relation |
http://jeb.biologists.org/cgi/content/short/217/7/1154 http://dx.doi.org/10.1242/jeb.093146 |
op_rights |
Copyright (C) 2014, Company of Biologists |
op_doi |
https://doi.org/10.1242/jeb.093146 |
container_title |
Journal of Experimental Biology |
_version_ |
1766022841595068416 |