caa a22 4500 605514313 CHVBK 20210128100704.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s00360-015-0927-3 doi (NATIONALLICENCE)springer-10.1007/s00360-015-0927-3 The relationship between body temperature, heart rate, breathing rate, and rate of oxygen consumption, in the tegu lizard ( Tupinambis merianae ) at various levels of activity [Elektronische Daten] [Joanna Piercy, Kip Rogers, Michelle Reichert, Denis Andrade, Augusto Abe, Glenn Tattersall, William Milsom] The present study determined whether EEG and/or EMG recordings could be used to reliably define activity states in the Brazilian black and white tegu lizard (Tupinambis merianae) and then examined the interactive effects of temperature and activity states on strategies for matching O2 supply and demand. In a first series of experiments, the rate of oxygen consumption ( $$\dot{V}_{{{\text{O}}_{ 2} }}$$ V ˙ O 2 ), breathing frequency (f R), heart rate (f H), and EEG and EMG (neck muscle) activity were measured in different sleep/wake states (sleeping, awake but quiet, alert, or moving). In general, metabolic and cardio-respiratory changes were better indictors of the transition from sleep to wake than were changes in the EEG and EMG. In a second series of experiments, the interactive effects of temperature (17, 27 and 37°C) and activity states on f R, tidal volume (V T), the fraction of oxygen extracted from the lung per breath (FIO2-FEO2), f H, and the cardiac O2 pulse were quantified to determine the relative roles of each of these variables in accommodating changes in $$\dot{V}_{{{\text{O}}_{ 2} }}$$ V ˙ O 2 . The increases in oxygen supply to meet temperature- and activity-induced increases in oxygen demand were produced almost exclusively by increases in f H and f R. Regression analysis showed that the effects of temperature and activity state on the relationships between f H, f R and $$\dot{V}_{{{\text{O}}_{ 2} }}$$ V ˙ O 2 was to extend a common relationship along a single curve, rather than separate relationships for each metabolic state. For these lizards, the predictive powers of f R and f H were maximized when the effects of changes in temperature, digestive state and activity were pooled. However, the best r 2 values obtained were 0.63 and 0.74 using f R and f H as predictors of met abolic rate, respectively. Springer-Verlag Berlin Heidelberg, 2015 Body temperature nationallicence Heart rate nationallicence Breathing rate nationallicence Metabolic rate nationallicence Tegu lizard nationallicence Piercy Joanna Department of Zoology, University of British Columbia, 6270 University Boulevard, V6T 1Z4, Vancouver, BC, Canada aut Rogers Kip Department of Zoology, University of British Columbia, 6270 University Boulevard, V6T 1Z4, Vancouver, BC, Canada aut Reichert Michelle Department of Zoology, University of British Columbia, 6270 University Boulevard, V6T 1Z4, Vancouver, BC, Canada aut Andrade Denis Depto de Zoologia, Instituto Nacional de Ciência e Tecnologia em Fisiologia Comparada, Univ Estadual Paulista-Rio Claro, Rio Claro, SP, Brazil aut Abe Augusto Depto de Zoologia, Instituto Nacional de Ciência e Tecnologia em Fisiologia Comparada, Univ Estadual Paulista-Rio Claro, Rio Claro, SP, Brazil aut Tattersall Glenn Department of Biological Sciences, Brock University, St Catharines, ON, Canada aut Milsom William Department of Zoology, University of British Columbia, 6270 University Boulevard, V6T 1Z4, Vancouver, BC, Canada aut Journal of Comparative Physiology B Springer Berlin Heidelberg 185/8(2015-12-01), 891-903 0174-1578 185:8<891 2015 185 360 https://doi.org/10.1007/s00360-015-0927-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00360-015-0927-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Piercy Joanna Department of Zoology, University of British Columbia, 6270 University Boulevard, V6T 1Z4, Vancouver, BC, Canada aut NATIONALLICENCE 700 1- Rogers Kip Department of Zoology, University of British Columbia, 6270 University Boulevard, V6T 1Z4, Vancouver, BC, Canada aut NATIONALLICENCE 700 1- Reichert Michelle Department of Zoology, University of British Columbia, 6270 University Boulevard, V6T 1Z4, Vancouver, BC, Canada aut NATIONALLICENCE 700 1- Andrade Denis Depto de Zoologia, Instituto Nacional de Ciência e Tecnologia em Fisiologia Comparada, Univ Estadual Paulista-Rio Claro, Rio Claro, SP, Brazil aut NATIONALLICENCE 700 1- Abe Augusto Depto de Zoologia, Instituto Nacional de Ciência e Tecnologia em Fisiologia Comparada, Univ Estadual Paulista-Rio Claro, Rio Claro, SP, Brazil aut NATIONALLICENCE 700 1- Tattersall Glenn Department of Biological Sciences, Brock University, St Catharines, ON, Canada aut NATIONALLICENCE 700 1- Milsom William Department of Zoology, University of British Columbia, 6270 University Boulevard, V6T 1Z4, Vancouver, BC, Canada aut NATIONALLICENCE 773 0- Journal of Comparative Physiology B Springer Berlin Heidelberg 185/8(2015-12-01), 891-903 0174-1578 185:8<891 2015 185 360