Animal breeding research in South Africa. During the 1979/80 financial year R310 million or 0,64 % of the GNP was spent on research. Of this amount 89,28 % was spent on research in the natural sciences and 10,72 % on…
National planning and coordination of animal research in South Africa. The Department of Agriculture makes the biggest financial inputs into animal research in South Africa. It is therefore appropriate to examine the organization and objective management system of the Department…
Embryo micromanipulation techniques and their potential genetic impact in dairy cattle are discussed. In addition, some aspects of gene transfer are mentioned. Only the technique of splitting bovine embryos and the subsequent transfer of half-embryos has reached a stage which…
Nutrition research with grazing ruminants. Native pasture is still the main source of feed supply for the sheep and beef cattle industries. Apparently an inadequate intake of digestible nutrients puts a limitation on animal production. Due to the seasonal pattern…
This study aimed to determine the fatty acid and composition and cholesterol concentration of horsemeat, and to evaluate its taste acceptability by the Brazilian population. Horsemeat samples were obtained from a Paraná State slaughterhouse. The chemical composition revealed a low…
The PR domain containing the 16 (PRDM16) gene, also known as the MDS1/EVI1-like gene (MEL1), may act as a bidirectional switch between brown fat and skeletal muscle in mice. The molecular characteristics and possible biological function of porcine PRDM16 gene…
Three wether lambs of the Mutton Merino type were kept confined in metabolism cages confined to either a calorimeter or a structure resembling the plant, from about birth to about 36 weeks. Measurements over regular intervals with aid of the…
The effect of protein : energy ratio's in milk replacers based on whey powder as the main energy source was studied. In a digestion-balance trial 9 milk replacers containing decreasing levels of crude protein but increasing levels of high fat…
The optimum level of inclusion of high fat whey (HFW) in calf milk replacers was investigated. In a set of 9 treatments 45 Friesian bull calves( 5 per treatment) were randomly allocated and subjected to a digestion-balance tr al. A…
In order to develop improved lamb production systems off the Dohne Sourveld qualitative and quantitative changes were brought about by either, (l) veld fertilization. (2) mowing or, (3) sod-seeding of lucerne. The production response of lactating ewes which received either…
The apparent and true metabolizable energy concentrations of 22 cultivars of sorghum grains, differing in their tannic ac id content, were determined by feeding samples of the different varieties to adult roosters. A highly significant negative correlation was found to…
Diets containing 3 levels of heated full fat soya bean meal (15, 18 and 21%) each supplemented at 5 lysine levels (0,70; 0,75; 0,80; 0,85 and 0.90%) were fed to 60 porkers (30 gilts and 30 boars) in diets, formulated…
Five diets, containing equal amounts (23 %) of crude protein, and different energy concentrations, ranging from 11,5 to 17,0 MJ ME/kg DM, were fed ad lib to 52 Landrace X LargeWhite barrows. Dietary energy content was manipulated by replacing maize…
Observations of 5 production traits on 4 000 individuals in the Dohne Merino Development Programme were used to estimate correction factors for the influence of age of dam, type of birth (single or twin) and sex of lamb on 5…
Production data of 366 individuals in the Dohne Merino Development programme at the Dohne Agricultural Research Institute, were used for the estimation of the heritabilities of 15 production traits. Halfsib analyses were applied to data corrected for identifiable environmental factors…
The chemically determined fat content (ether extract) and the cuticular structure of the fibres (barbules) of ostrich plumes were related to the 5 standardized categories of subjectively evaluated fatty appearance as used in practice. With regard to the quality traits…
Eighteen beef heifers, representing the Bos taurus (Shorthorn), Bos indicus (Afrikaner) and intermediate (Bonsmara) types, were confined to a pen with floor space of 4,6 m2 per heifer. A similar number of heifers on the veld served as a control…
The object of the study was to determine diet combinations consisting of soybean flour, whey powder and colostrum that can be employed in practice to decrease the pre-weaning rearing costs of dairy calves. In a mixture design experiment the soybean…
