Respiratory and Cardiovascular Adjustments to Exercise in Reptiles

Gleeson, Todd T.; Bennett, Albert A.

doi:10.1007/978-3-642-70610-3_2

Cited by 4 publications

(1 citation statement)

References 53 publications

(71 reference statements)

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“…lactate and hydrogen ions) accumulate in the bloodstream. The resulting activity-induced acid-base disturbance is buffered through ventilatory adjustments which serve to release bicarbonate-derived CO 2 from the lungs (Gleeson and Bennett, 1985). As a consequence, snakes and other reptiles routinely exhibit VĊ O2 values that exceed VȮ 2 during physical activity, resulting in RQ values that surpass 1.0 (Gleeson and Bennett, 1982).…”

Section: Fasting Exhaustive Activitymentioning

confidence: 99%

Patterns of oxygen consumption during simultaneously occurring elevated metabolic states in the viviparous snake,Thamnophis marcianus

Jackson

Leu

Ford

et al. 2015

Journal of Experimental Biology

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Snakes exhibit large factorial increments in oxygen consumption during digestion and physical activity, and long-lasting sub-maximal increments during reproduction. Under natural conditions, all three physiological states may occur simultaneously, but the integrated response is not well understood. Adult male and female checkered gartersnakes (Thamnophis marcianus) were used to examine increments in oxygen consumption (i.e. V O2 ) and carbon dioxide production (i.e. V CO2 ) associated with activity (Act), digestion (Dig) and post-prandial activity (Act+Dig). For females, we carried out these trials in the non-reproductive state, and also during the vitellogenic (V) and embryogenic (E) phases of a reproductive cycle. Endurance time (i.e. time to exhaustion, TTE) was recorded for all groups during Act and Act +Dig trials. Our results indicate that male and non-reproductive female T. marcianus exhibit significant increments in V O2 during digestion (∼5-fold) and activity (∼9-fold), and that Act+Dig results in a similar increment in V O2 (∼9-to 10-fold). During reproduction, resting V O2 increased by 1.6-to 1.7-fold, and peak increments during digestion were elevated by 30-50% above non-reproductive values, but values associated with Act and Act+Dig were not significantly different from non-reproductive values. During Act+Dig, endurance time remained similar for all of the groups in the present study. Overall, our results indicate that prioritization is the primary pattern of interaction in oxygen delivery exhibited by this species. We propose that the metabolic processes associated with digestion, and perhaps reproduction, are temporarily compromised during activity.

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Section: Fasting Exhaustive Activitymentioning

confidence: 99%

Patterns of oxygen consumption during simultaneously occurring elevated metabolic states in the viviparous snake,Thamnophis marcianus

Jackson

Leu

Ford

et al. 2015

Journal of Experimental Biology

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Vertebrate Cardiovascular Systems

Burggren¹,

Farrell²,

Lillywhite³

1997

Comprehensive Physiology

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The sections in this article are: Diversity of Vertebrate Cardiovascular Patterns Vertebrate Origins and Driving Forces behind Cardiovascular Evolution Cardiovascular Patterns in Vertebrates Functional Properties of Vertebrate Hearts Overview Electrical Properties of Cardiac Cells Excitation–Contraction Coupling Mechanical Properties of Cardiac Muscle Cardiac Output and Cardiac Performance Coronary Circulations, Myocardial O 2 Consumption, and Myocardial O 2 Supply Peripheral Circulation and Hemodynamics Arterial Blood Pressure and Its Regulation Blood Volume and Its Regulation Cardiovascular Performance Under Special Conditions Aerobic Exercise Breath Holding and Diving Reduced Metabolism Digestive State Responses to Gravity Development of Cardiovascular Systems Conclusions and Future Directions Mechanistic Unknowns Adaptive Unknowns Integrative Unknowns Developmental Unknowns

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Thermal insensitivity of oxygen pulse in spontaneously-active juvenile alligators

Phelps

Gatten

1991

Journal of Thermal Biology

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Respiratory and Cardiovascular Adjustments to Exercise in Reptiles

Cited by 4 publications

References 53 publications

Patterns of oxygen consumption during simultaneously occurring elevated metabolic states in the viviparous snake,Thamnophis marcianus

Patterns of oxygen consumption during simultaneously occurring elevated metabolic states in the viviparous snake,Thamnophis marcianus

Vertebrate Cardiovascular Systems

Thermal insensitivity of oxygen pulse in spontaneously-active juvenile alligators

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