oa Madoqua - Preliminary observations on the digestive and renal efficiency of Hartmann's zebra Equus zebra hartmannae
An investigation of the digestive and renal efficiency of Hartmann's zebra has shown that digestive efficiency in these animals does not differ significantly from the domestic horse. The maximum urine osmolality recorded was 1 4655 mOsm and the mean plasma : urine concentration ratio for eight animals was 4,l indicating only moderate urine concentrating ability in this species. Behavioural thermo-regulation, particularly shade-seeking and orientation of the long axis of the body to change the light : dark ratio exposed to solar radiation, appears to be an important adaptive trait to minimise evaporative water loss.
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