dc.contributor.author | Maloiy, GMO | |
dc.date.accessioned | 2013-05-20T09:16:15Z | |
dc.date.available | 2013-05-20T09:16:15Z | |
dc.date.issued | 1973-11 | |
dc.identifier.citation | Proceedings of the Royal Society of London. Series B, Containing papers of a Biological character.1973 Nov 27;184(75):167-78. | en |
dc.identifier.issn | 0080-4649 | |
dc.identifier.uri | http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/23885 | |
dc.description | Journal article | en |
dc.description.abstract | 1. In controlled laboratory experiments, rectal temperature, cutaneous moisture evaporation, and respiratory rate were studied in the dik-dik. The water balance of the dik-dik was investigated when the antelope were either fully hydrated or dehydrated at the environ- mental temperature of 22 0C or at temperatures alternating between 22 0C and 40 0C at 12 h intervals. 2. Faecal, urinary and evaporative water losses were all reduced by varying degrees during dehydration at 22 0C and 22 to 40 'C. The highest urine osmolality recorded was 4318 + 105 mosmol/kg H20 which occurred when the antelopes were severely dehydrated. 3. At the high air temperatures (40 to 45 ?C) cutaneous evaporation measured with a non- ventilated sweat capsule was 19 g H20 rn-2 h-1 and the respiratory rate over 360/min. Thus the respiratory tract seems to be the major avenue for dissipating excess heat in dik-dik exposed to thermal stress. Injection of adrenaline, intravenously, stimulated sweat dis- charges similar to those observed in the small gazelles, and sheep and goats. 4. The low-water exchange and an efficient kidney helps explain the ability of this small antelope to inhabit hot arid areas. | en |
dc.language.iso | en | en |
dc.subject | Water metabolism | en |
dc.subject | Small East African antelope | en |
dc.subject | Dik-dik. | en |
dc.title | The water metabolism of a small East African antelope: the dik-dik | en |
dc.type | Article | en |
local.publisher | Department of Veterinary Anatomy and Physiology, University of Nairobi | en |