|Type||Journal Article - South African Journal of Animal Science|
|Title||Responses of Tswana goats to various lengths of water deprivation|
The aim of this trial was to determine the water intake of Tswana goats and investigate the effects of short term water
deprivation in summer or winter (6000 ml water offered either once every 72 h, 48 h, 24 h or ad libitum) on feed intake,
dry matter digestibility, growth rate and health. Goats were fed a diet comprising 60% Cenchrus ciliaris hay and 40%
Medicago sativa hay. Feed intake per kg metabolic weight was inversely related to water intake. Body weight gains
decreased with longer watering intervals, rectal temperatures were unaffected but respiratory rate, packed cell volume,
pulse rate, haemoglogin level and mean corpuscular haemoglobin concentration was highest with the 72 h watering interval.
Feed intake and daily weight gains were higher in winter than summer, but animals drank more water in summer than in
winter, and showed more signs of dehydration in summer. Dry matter digestibilities (%) were 66.8, 66.7, 64.2 and 65.2 for
water intake intervals of ad lib, 24 h, 48 h and 72 h respectively; digestibilities of organic matter, crude protein and crude
fibre followed the same trend. Urine output, faecal output per kg metabolic weight and faecal moisture content decreased
with increased length of water deprivation. It was concluded that Tswana goats are well adapted to semi-arid zones and can
be watered once in 72 h without severe dehydration.
|»||Botswana - Agricultural Census 2004|