Document Detail

Static inflation and deflation pressure-volume curves from excised lungs of marine mammals.
MedLine Citation:
PMID:  22031747     Owner:  NLM     Status:  MEDLINE    
Excised lungs from eight marine mammal species [harp seal (Pagophilus groenlandicus), harbor seal (Phoca vitulina), gray seal (Halichoerus grypush), Atlantic white-sided dolphin (Lagenorhynchus acutus), common dolphin (Delphinus delphis), Risso's dolphin (Grampus griseus), long-finned pilot whale (Globicephala melas) and harbor porpoise (Phocoena phocoena)] were used to determine the minimum air volume of the relaxed lung (MAV, N=15), the elastic properties (pressure-volume curves, N=24) of the respiratory system and the total lung capacity (TLC). Our data indicate that mass-specific TLC (sTLC, l kg(-1)) does not differ between species or groups (odontocete vs phocid) and agree with that estimated (TLC(est)) from body mass (M(b)) by applying the equation: TLC(est)=0.135 M(b)(0.92). Measured MAV was on average 7% of TLC, with a range from 0 to 16%. The pressure-volume curves were similar among species on inflation but diverged during deflation in phocids in comparison with odontocetes. These differences provide a structural basis for observed species differences in the depth at which lungs collapse and gas exchange ceases.
Andreas Fahlman; Stephen H Loring; Massimo Ferrigno; Colby Moore; Greg Early; Misty Niemeyer; Betty Lentell; Frederic Wenzel; Ruth Joy; Michael J Moore
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  The Journal of experimental biology     Volume:  214     ISSN:  1477-9145     ISO Abbreviation:  J. Exp. Biol.     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-10-27     Completed Date:  2012-02-15     Revised Date:  2013-06-27    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  3822-8     Citation Subset:  IM    
Woods Hole Oceanographic Institution, 266 Woods Hole Road, MS 50, Woods Hole, MA 02543, USA.
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MeSH Terms
Diving / physiology*
Dolphins / physiology*
Lung / physiology
Phocoena / psychology*
Seals, Earless / physiology*
Total Lung Capacity
Whales, Pilot / physiology
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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