Three in vivo techniques were evaluated in terms of their suitability for determination of the apparent ileal amino acid digestibility (AID) of protein sources for piglets. The techniques were: ileo-rectal anastomosis (IRA), cannulation at the distal ileum and a slaughter…
The effect of night cropping (shooting the animal in the head with a light calibre rifle) on the pH45, pH24 and rate of pH decline in the M. longissimus thoracis of 10 Grey duikers was investigated. A mean pH45 of…
The yield, nutritional value and production potential of silage made from twenty one maize hybrids were compared. The digestibility of organic matter and predicted intake, mean retention time and milk production potential were found to differ between hybrids (p <…
Nineteen Holstein steers were randomly assigned to one of four treatments; no implant (CON); 36 mg zeranol (Ralgro) on d 0 and 20 mg estradiol benzoate plus 200 mg progesterone (Synovex S) on d 84 and 169 (RSS); Ralgro on…
Ewe lambs born to group pen-fed Karakul ewes in the summer (February), winter (June) or spring (October) respectively, were raised to study the influence of season of birth on the onset of sexual maturity. Lambs were exposed to fertile rams…
Data involving monthly records of egg production (EP), chick production (CP), hatchability (H), mean egg weight (MEW) and mean day-old chick weight (MCW) were analysed using REML procedures. All traits were treated as hen traits. Egg production of young birds…
A representative sample of mature dry maize plants from a 3-ha stand were separated into the components grain, leaf, stem, cob-sheath, and cob. In addition, a sample representing the total plant was composited. Dry matter (DM) yields, component proportions and…
The effect of grain source (wheat or maize), sex (boars or gilts) and live mass (85 or 120 kg) on the fatty acid composition of backfat was studied on 40 ad lib. fed Landrace x Large White pigs. A highly…
The first part of the investigation included a study of the frequency of blood factors in different goat breeds from Europe and South Africa using sheep blood typing reagents detecting related red cell antigens in the goat. It appeared that…
The experiment was conducted to study the effects of organic selenium (Se-enriched yeast) and vitamin E (α-tocopheryl acetate) supplementation, alone or together, on the performance and antioxidant status of broilers fed diets enriched in n-3 PUFAs using fish oil. Day-old…
Data of 1483 birth and 1209 weaning records of Dorper lambs in a commercial flock were used to investigate the effects of environmental factors on birth and weaning mass, and on pre-weaning growth and survival. Preweaning survival was relatively high…
A sample of the 1984/85 wool clip was analysed to determine the physical properties affecting price. Clean yield percentage and fibre diameter were found to be by far the most important. The importance of the other properties varied between ports…
The use of the CIDR (controlled internal drug release) dispenser as a progestagen-synchronizing agent was evaluated in 37 Karakul ewes during the breeding season, using the intravaginal progestagen sponge as a control (30 ewes). Although there was no significant differences…
Data from 188 sows were used in the current study to examine the effects of high mobility group AT-hook1 (HMGA1), transcription factor 7-like-2 (TCF7L2) and insulin-like growth factor binding protein 3 (IGFBP3) genes on leg action and fat deposition traits,…
This study was designed to investigate impact of tannins on in vitro ruminal fermentation parameters as well as relationships between concentration and in vitro biological activity of tannins present in tree fruits. Dry and mature fruits of known phenolic content…
The present study was conducted to investigate the effects of the supplementation of an antibiotic growth promoter or novel feed additives with or without a xylanase-based enzyme complex to wheat-based diets on the growth performance, carcass yields and quality and…
In order to determine the amino acid digestibility of artemia meal, five-week old male broiler chicks were given a semi-purified diet in which artemia meal was the sole source of protein. Apparent amino acid digestibility values of the assay diet,…
The objective of this study was to determine the fitness of Quadratic, Cubic, Gompertz and Logistic functions to the growth curves of Konya Merino lambs obtained by using monthly records of live weight from birth to 480 days of age…
Male broiler breeders were photostimulated at different ages (56, 77, 98, 119, 147 and 161 d) during the period of growth prior to achieving sexual maturity to observe their response to photoperiod stimulation. Birds were sampled at regular intervals to…
Records of the Tygerhoek Merino resource flock were used to estimate genetic, phenotypic and environmental parameters for subjectively assessed wool and conformation traits. The database consisted of records of 4 495 animals, the progeny of 449 sires and 1 831…
