The relationship between rate of oxygen consumption, heart rate and thermal conductance of the dik-dik antelope (Rhynchotragus kirkii) at various ambient temperatures.
Abstract
1. The extent of cardiovascular adjustments to heat and cold were investigated between ambient temperatures of 5 and 45 degrees C by measuring conductance and the rates of oxygen consumption and heart beats. 2. Minimum heart rate was observed at 25 degrees C (114 +/- 9 beats/min). In the heat at 45 degrees C heart rate was observed to increase only slightly (127 +/- 12 beats/min) but in the cold -5 degrees C heart rate nearly doubled that at 25 degrees C. 3. Thermal conductance was on average 0.031 mlO2 (g. hr. degrees C)-1 below 25 degrees C but increased by more than 20 times at 40 degrees C. 4. A positive correlation between heart rate and rate of oxygen consumption was demonstrated below 25 degrees C and the relation may be of practical use.
URI
http//www.sciencedirect.com/sciencejournal/03009629http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/23642
Citation
Comparative biochemistry and physiology. A, Comparative physiology. 1982;73(1):21-4.Publisher
Department of Veterinary Anatomy and Physiology, University of Nairobi
Subject
Oxygen consumptionHeart rate
Thermal conductance
Dik-dik antelope (Rhynchotragus kirkii)
Ambient temperatures.
Description
Journal article