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   Oxyura (stiff-tailed ducks) 
   Oxyura jamaicensis (gray teal) 
 
 
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1.  A morphometric analysis of the lungs of high-altitude ducks and geese.LinkIT
Bakkeren C, Smith E, York JM, Chua B, McCracken KG, Milsom WK
Journal of anatomy J. Anat. A morphometric analysis of the lungs of high-altitude ducks and geese. 188-196 10.1111/joa.13180 We examined the morphology of the lungs of five species of high-altitude resident ducks from Lake Titicaca in the Peruvian Andes (yellow-billed pintail [Anas georgica], cinnamon teal [Anas cyanoptera orinomus], puna teal [Anas puna], speckled teal [Anas flavirostris oxyptera], and ruddy duck [Oxyura jamaicensis ferruginea]) and compared them with those of the high-altitude migratory bar-headed goose (Anser indicus) and the low-altitude migratory barnacle goose (Branta leucopsis). We then determined the relationship between mass-specific lung volume, the volume densities of the component parts of the lung, and previously reported hypoxia-induced increases in pulmonary O2 extraction. We found that the mass-specific lung volumes and the mass-specific volume of the exchange tissue were larger in the lungs of high-altitude resident birds. The bar-headed goose had a mass-specific lung volume that fell between those of the low-altitude species and the high-altitude residents, but a mass-specific volume of exchange tissue that was not significantly different than that of the high-altitude residents. The data suggest that the mass-specific volume of the lung may increase with evolutionary time spent at altitude. We found an inverse relationship between the percentage increase in pulmonary O2 extraction and the percentage increase in ventilation across species that was independent of the volume density of the exchange tissue, at least for the resident Andean birds. © 2020 Anatomical Society. Bakkeren Ciska C https://orcid.org/0000-0002-1485-2728 Department of Zoology, University of British Columbia, Vancouver, BC, Canada. Smith Emily E Department of Zoology, University of British Columbia, Vancouver, BC, Canada. York Julia M JM Department of Integrative Biology, University of Texas at Austin, Austin, TX, USA. Chua Beverly B Department of Zoology, University of British Columbia, Vancouver, BC, Canada. McCracken Kevin G KG Department of Biology, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Coral Gables, FL, USA. Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Coral Gables, FL, USA. Human Genetics and Genomics, University of Miami Miller School of Medicine, University of Miami, Coral Gables, FL, USA. University of Alaska Museum and Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, USA. Milsom William K WK https://orcid.org/0000-0002-0866-7489 Department of Zoology, University of British Columbia, Vancouver, BC, Canada. eng NSERC of Canada IOS-0949439 National Science Foundation University of Miami Journal Article 2020 03 15 England J Anat 0137162 0021-8782 IM altitude birds hypoxia lungs morphometry pulmonary O2 extraction pulmonary exchange tissue 2019 11 15 2020 02 12 2020 02 18 2020 3 17 6 0 2020 3 17 6 0 2020 3 17 6 0 ppublish 32173858 10.1111/joa.13180 REFERENCES, 2020</i></font><br><font color=#008000>http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=0<br></font></span><br></table></tr></table></td><script src="http://www.google-analytics.com/urchin.js" type="text/javascript"> </script> <script type="text/javascript"> _uacct = "UA-634822-1"; urchinTracker(); </script> </BODY> </HTML>