Browsing Research Articles (Animal Sciences) by Title
Now showing items 1-20 of 116
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Across flock genetic parameter estimation for yearling body weight and fleece traits in the South African Dohne Merino population
(South African Society for Animal Science, 2008)Accurate genetic parameter estimates are needed upon which to perform multiple-trait across flock breed analyses. Genetic parameters for yearling body weight (BW), clean fleece weight (CFW) and mean fibre diameter (MFD) ... -
The adaption of the South Africa sheep industry to new trends in animal breeding and genetics : a review
(South African Society for Animal Science, 2014-10-11)The history of sheep breeding research in South Africa can be divided roughly into four eras, namely the research and development phase, the commencement of recording and evaluation, the expansion of recording schemes, ... -
Amino acid requirements of South African Mutton Merino lambs 3. Duodenal and whole empty body essential amino acid profile
(South African Society for Animal Science, 1999)The duodenal and whole empty body essential amino acid (EAA) profile of South African Mutton Merino lambs fed a standard growth diet was investigated. The data of 20 lambs were used. With the exception of phenylalanine, ... -
Anti-nutritional factors in canola produced in the Western and Southern Cape areas of South Africa
(South African Society for Animal Science, 2007)ABSTRACT: The development of low erucic acid, low glucosinolate cultivars of canola seed has led to the availability of a feed ingredient with considerable potential to replace soyabean meal in diets for all classes of ... -
Carcass and muscle yields of ostriches as influenced by genotype
(South African Society for Animal Science, 2007)ABSTRACT: Live, carcass, leg and muscle weight (kg) as well as dressing percentage were compared between South African Black (Struthio camelus var. domesticus) ostriches, purebred Zimbabwean Blue Neck (Struthio camelus ... -
Carcass traits and cutting yields of entire and immunocastrated pigs fed increasing protein levels with and without ractopamine hydrochloride supplementation
(American Society of Animal Science, 2015)The objective of this study was to determine the effects of increasing balanced protein, with and without ractopamine hydrochloride (RAC), in the finisher diets of immunocastrates on their carcass cutting yields and ... -
Castration of male livestock and the potential of immunocastration to improve animal welfare and production traits : invited review
(South African Society for Animal Science, 2017-09-15)Growing consumer awareness about animal welfare has led to the assessment of the impact of common farming practices, such as physical castration, on animal well-being under production conditions. Physical castration is ... -
Characterization of pigeon paramyxoviruses (Newcastle disease virus) isolated in South Africa from 2001 to 2006
(AOSIS OpenJournals, 2008)Pigeon paramyxovirus type 1 (PPMV-1), a variant of Newcastle disease virus that primarily affects doves and pigeons has been isolated in South Africa since the mid-1980s. Phylogenetic evidence indicates that pigeon ... -
Chemical characteristics of red hartebeest (Alcelaphus buselaphus caama) meat
(South African Society for Animal Science, 2010)The aim of this study was to determine the effect of region (Qua-Qua, Maria Moroka, Sandveld and Tussen die Riviere) and gender on carcass characteristics and chemical composition of meat from the red hartebeest. The ... -
Chemical composition, true metabolisable energy content and amino acid availability of grain legumes for poultry
(South African Society for Animal Science, 2004)Samples of sweet yellow lupins (Lupinus luteus; n = 4), broad leaf lupins (Lupinus albus; n = 12), narrow leaf lupins (Lupinus angustifolius; n = 8), faba beans (Vicia faba; n = 2), field peas (Pisum sativum; n = 4) and ... -
A comparison between the body composition, carcass characteristics and retail cuts of South African mutton Merino and Dormer sheep
(South African Society for Animal Science, 2004)The body composition, carcass characteristics and retail cuts of 61 Dormers (21 rams and 40 ewes) and 35 South African Mutton Merinos (SAMM) (17 rams and 18 ewes) were determined. A range of carcass measurements was recorded. ... -
A comparison between the effects of two cropping methods on the meat quality of impala (Aepyceros melampus)
(South African Society for Animal Science, 2003)Impala (Aepyceros melampus) constitute one of the most commercially important species in game farming in South Africa. The purpose of this study was to compare the effects of day and night cropping on the meat quality ... -
Comparison of shear force tenderness, drip and cooking loss, and ultimate muscle pH of the loin muscle among grass-fed steers of four major beef crosses slaughtered in Namibia
(South African Society for Animal Science, 2016)The authors investigated the effects of breed (Brahman, Bonsmara, Simbrah and Simmental crosses) and post-mortem ageing on meat tenderness, purge, cooking loss and ultimate pH of the longissimus muscle under commercial ... -
Conception rate and fecundity of Dohne Merino ewes in a continuous mating system
(South African Society for Animal Science, 2014-08-24)A study was conducted to evaluate the conception rate and fecundity of Dohne Merino ewes in an intensive sheep production system, where continuous mating was applied. The study was conducted at the Kromme Rhee research ... -
Conservation of indigenous cattle genetic resources in Southern Africa’s smallholder areas : turning threats into opportunities - A review
(Asian-Australasian Association of Animal Production Societies, 2017)The current review focuses on characterization and conservation efforts vital for the development of breeding programmes for indigenous beef cattle genetic resources in Southern Africa. Indigenous African cattle breeds ... -
Dead-in-shell positions of near-term ostrich embryos
(South African Society for Animal Science, 2016-12-06)The patterns of embryonic development in ostriches, especially in the last stage of hatching, are still not well understood. This study examined between 3468 and 3484 dead-in-shell (DIS) eggs with chicks that died between ... -
Direct PCR offers a fast and reliable alternative to conventional DNA isolation methods for gut microbiomes
(American Society for Microbiology, 2017)The gut microbiome of animals is emerging as an important factor influencing ecological and evolutionary processes. A major bottleneck in obtaining microbiome data from large numbers of samples is the time-consuming ... -
The earliest known Palaeozoic ensiferan insect from africa, Afroedischia oosthuizeni gen. et sp. nov. (Orthoptera: Oedischiidae)
(Academy of Science for South Africa, 1999)An oedischiid orthopteran insect from the Lower Permian of southern Africa is described as Afroedischia oosthuizeni gen. et sp. nov. This is the only member of the family Oedischiidae known in the Southern Hemisphere, if ... -
The effect of age on in sacco estimates of rumen dry matter and crude protein degradability in veal calves
(South African Society for Animal Science, 2000)This study was conducted to determine whether rumen dry matter and crude protein degradability in calves aged 8-10 weeks differs from that in mature cows. Five Holstein bull calves were rumen-fistulated at six weeks of age ... -
The effect of age on the carcass composition, portion yield and proximate composition of two rabbit genetic types in South Africa
(Universidad Politécnica de Valencia, 2017)This study investigated the carcass component yields and meat proximate composition of 2 rabbit genetic types (Californian and hybrid New Zealand Red×Californian), with 5 rabbits per genetic type being slaughtered every 2 ...
