| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | De Andrade, D. V. | |
| dc.creator | Abe, Augusto Shinya | |
| dc.date | 2014-02-26T17:09:15Z | |
| dc.date | 2014-05-20T13:59:10Z | |
| dc.date | 2016-10-25T17:07:23Z | |
| dc.date | 2014-02-26T17:09:15Z | |
| dc.date | 2014-05-20T13:59:10Z | |
| dc.date | 2016-10-25T17:07:23Z | |
| dc.date | 1999-12-01 | |
| dc.date.accessioned | 2017-04-05T21:20:49Z | |
| dc.date.available | 2017-04-05T21:20:49Z | |
| dc.identifier | Journal of Experimental Biology. Cambridge: Company of Biologists Ltd, v. 202, n. 24, p. 3677-3685, 1999. | |
| dc.identifier | 0022-0949 | |
| dc.identifier | http://hdl.handle.net/11449/21033 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/21033 | |
| dc.identifier | WOS:000084783000019 | |
| dc.identifier | http://www.ncbi.nlm.nih.gov/pubmed/10574745 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/866656 | |
| dc.description | The tegu lizard Tupinambis merianae exhibits an episodic ventilatory pattern when dormant at 17 degrees C but a uniform ventilatory pattern when dormant at 25 degrees C. At 17 degrees C, ventilatory episodes were composed of 1-22 breaths interspaced by non-ventilatory periods lasting 1.8-26min, Dormancy at the higher body temperature was accompanied by higher rates of O-2 consumption and ventilation. The increase in ventilation was due only to increases in breathing frequency with no change observed in tidal volume. The air convection requirement for O-2 did not differ at the two body temperatures. The respiratory quotient was 0.8 at 17 degrees C and 1.0 at 25 degrees C. We found no consistent relationship between expired gas composition and the start/end of the ventilatory period during episodic breathing at 17 degrees C. However, following non-ventilatory periods of increasing duration, there was an increase in the pulmonary O-2 extraction that was not coupled to an equivalent increase in elimination of CO2 from the lungs. None of the changes in the variables studied could alone explain the initiation/termination of episodic ventilation in the tegus, suggesting that breathing episodes are shaped by a complex interaction between many variables. The estimated oxidative cost of breathing in dormant tegus at 17 degrees C was equivalent to 52.3% of the total metabolic rate, indicating that breathing is the most costly activity during dormancy. | |
| dc.language | eng | |
| dc.publisher | Company of Biologists Ltd | |
| dc.relation | Journal of Experimental Biology | |
| dc.rights | info:eu-repo/semantics/closedAccess | |
| dc.subject | gas exchange | |
| dc.subject | ventilation | |
| dc.subject | breathing pattern | |
| dc.subject | metabolic rate | |
| dc.subject | cost of breathing | |
| dc.subject | dormancy | |
| dc.subject | tegu lizard | |
| dc.subject | Tupinambis merianae | |
| dc.title | Gas exchange and ventilation during dormancy in the tegu lizard Tupinambis merianae | |
| dc.type | Otro | |
