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dc.contributor.author Geist, Nicholas R. en
dc.date.accessioned 2012-06-21T19:14:29Z en
dc.date.available 2012-06-21T19:14:29Z en
dc.date.issued 2000 en
dc.identifier.citation Geist, N. R. 2000. Nasal Respiratory Turbinate Function in Birds. Physiol. Biochem. Zool. 73:581-589 en
dc.identifier.issn 1522-2152 en
dc.identifier.uri http://hdl.handle.net/10211.1/1481 en
dc.description Published by and copyright by Physiological and Biochemical Zoology en
dc.description.abstract Nasal respiratory turbinates are complex, epithelially lined structures in nearly all birds and mammals that act as intermittent countercurrent heat exchangers during routine lung ventilation. This study examined avian respiratory turbinate function in five large bird species (115-1, 900 g) inhabiting mesic temperate climates. Evaporative water loss and oxygen consumption rates of birds breathing normally (nasopharyngeal breathing) and with nasal turbinates experimentally bypassed (oropharyngeal breathing) were measured. Water and heat loss rates were calculated from lung tidal volumes and nasal and oropharyngeal exhaled air temperatures (T ex)' Resulting data indicate that respiratory turbinates are equally adaptive across a range of avian orders, regardless of environment, by conserving significant fractions of the daily water and heat budget. Nasal Tex of birds was compared to that of lizards, which lack respiratory turbinates. The comparatively high nasal Tex of the lizards in similar ambient conditions suggests that their relatively low metabolic rates and correspondingly reduced lung ventilation rates may have constrained selection on similar respiratory adaptations. en
dc.language.iso en_US en
dc.publisher Physiological and Biochemical Zoology en
dc.subject nasal respiratory turbinates in birds en
dc.subject avian metabolic rates en
dc.subject avian lung ventilation en
dc.title Nasal Respiratory Turbinate Function in Birds en
dc.type Article en
dc.relation.journal Physiological and Biochemical Zoology en
dc.contributor.sonomaauthor Geist, Nicholas R. en

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