Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 343-350 |
| Number of pages | 8 |
| Journal | Comparative Biochemistry and Physiology -- Part A: Physiology |
| Volume | 64 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1979 |
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Allometry of respiratory and haematological parameters of arctic mammal. / Withers, P. C.; Casey, T.M.; Casey, K.K.
In: Comparative Biochemistry and Physiology -- Part A: Physiology, Vol. 64, No. 3, 1979, p. 343-350.Research output: Contribution to journal › Article
TY - JOUR
T1 - Allometry of respiratory and haematological parameters of arctic mammal
AU - Withers, P. C.
AU - Casey, T.M.
AU - Casey, K.K.
PY - 1979
Y1 - 1979
N2 - 1. 1. The allometric relationships for minimum oxygen consumption and resting minute volume of summer acclimatized Arctic mammals were: V ̇o2 = 0.18 M0.62, V ̇min = 1.93 M0.77, and the exponents of these relationships decreased with decreasing ambient temperature. 2. 2. Oxygen extraction of small mammals in thermoneutrality was 4-5% and decreased at low Ta. Oxygen extraction of large mammals was lowest at high Ta. 3. 3. Expired air temperatures decreased with decreasing air temperatures and differed substantially for different species. 4. 4. Calculated evaporative heat loss in thermoneutrality varied from about 5-16% in different species due to differences in oxygen extraction and expired air temperature. 5. 5. Blood of Arctic mammals has high red cell count, high haemoglobin concentration and low red cell volume compared to temperature zone mammals suggesting hemoconcentration as a mechanism of cold adaptation. © 1979.
AB - 1. 1. The allometric relationships for minimum oxygen consumption and resting minute volume of summer acclimatized Arctic mammals were: V ̇o2 = 0.18 M0.62, V ̇min = 1.93 M0.77, and the exponents of these relationships decreased with decreasing ambient temperature. 2. 2. Oxygen extraction of small mammals in thermoneutrality was 4-5% and decreased at low Ta. Oxygen extraction of large mammals was lowest at high Ta. 3. 3. Expired air temperatures decreased with decreasing air temperatures and differed substantially for different species. 4. 4. Calculated evaporative heat loss in thermoneutrality varied from about 5-16% in different species due to differences in oxygen extraction and expired air temperature. 5. 5. Blood of Arctic mammals has high red cell count, high haemoglobin concentration and low red cell volume compared to temperature zone mammals suggesting hemoconcentration as a mechanism of cold adaptation. © 1979.
U2 - 10.1016/0300-9629(79)90453-5
DO - 10.1016/0300-9629(79)90453-5
M3 - Article
VL - 64
SP - 343
EP - 350
JO - Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology
JF - Comparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology
SN - 1095-6433
IS - 3
ER -