Browsing by Author "Hutchison, H.G."
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Item Effect of Yarding Cattle at Night without Supplementary Feeding on the Growth of Zebu Heifers(1971/1972) SaIehe, 1.; Hutchison, H.G.; KyomoI, M.L.; Ministry of AgriculturePairs of half-sib heifers belonging to Zebu breed type, and crosses were divided into two group'i. One group was grazed from 6 a.m. to 6 p.m. each day and were kraaled or yarded without supplementary feeding at night. The heifers in the remammg group (grazed group) were left in the paddocks most of the time (day and night). The heifers in the grazed group grew faster than the night yardedor kraaled heifers.Item The value of the tenth rib as a sample joint for the estimation of lean, fat and bone in carcasses of East African zebu cattle(1962) Hutchison, H.G.; Ledger, H.P.; Livestock Research Division, Veterinary Division: Ministry of Agriculture and Co· operative Development, Tanganyika1. Studies of tissues distribution in beef carcasses of East African 'Boran' cattle revealed very high correlations between the separable tissue analysis of the full tenth rib sample joint and of the full side. 2. A comparative study of tenth rib sample joints, from twelve steers and five cows cut at various positions along the length of the rib showed that the full rib sample gave a higher correlation (r = 0•948), with the full side in respect of all tissues except the subcutaneous fat, than any other sample joint. The subcutaneous fat of the whole side could not be predicted with reliability by the use of any rib sample, the highest correlation (r = O• 558) existing between the half-rib sample and the full side. 3. From detailed carcass studies of thirty-two steers and eight cows, including the twelve steers and five cows mentioned above, prediction equations are presented for estimating the percentages of lean, total fat, and butchers' bone in whole carcasses from single complete tenth rib samples. Standard deviations being 1•53 % for lean, 1•34 % for total fat in steers, 1•13 % for total fat in cows and 0•88 % for butchers' bone.Item Variation in Gestation Periods of Zebu Cattle under Ranch Conditions(1958) Hutchison, H.G.; Macfarlane, J.S.; Veterinary Research Laboratory, Mpwapwa, TanganyikaThere have been several published observations of mean gestation periods for various Indian breeds of Zebu cattle, but there is little information available about the gestation periods of the East African Zebu and advantage was therefore taken of facilities afforded by an experiment in reproductive physiology to study the gestation periods of 182 East African Zebu cows in Tanganyika for which unusually accurate data were available.Item Water metabolism of cattle in East Africa I. The problem and the experimental procedure(1963) Payne W. J. A.; Hutchison, H.G.; Ministry of Agriculture, Tanganyika1. The direct and indirect effects of low rainfall on the problems of cattle husbandry in East Africa are discussed, and an example of what these problems mean in practice is described. 2. A co-operative experiment is described that was planned to assess the water requirements of Bos indicus type cattle in a semi-arid region of Tanganyika, and to determine the effect of water deprivation on cattle productivity. 3. Ten sets of identical twin zebu (Bos indicus) or part-zebu cattle were used in this experiment. The basic layout consisted of two treatments, an 'experimental' and a 'control', one twin from each set being placed on one or other of the treatments. Twins in the 'experimental' group were used to determine the effect of watering at 24-, 48- and 72-hr. intervals and of forced walking of 3, 6 and 10 miles per day in addition to normal grazing exercise. The experiment lasted 2 years from 16 April 1960 to 11 May 1962. 4. Climate at the experimental site, the experimental layout, the experimental animals and grazing’s, management of animals and grazing’s and experimental observations are described in detail. 5. Data on seasonal changes in the nutrient content of forage on the grazing’s is given, and the effect of these changes on the nutrition of the experimental cattle is discussed briefly.
