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Browsing Research Articles (Animal Sciences) by Title

Browsing Research Articles (Animal Sciences) by Title

Now showing items 1-20 of 21

Anti-nutritional factors in canola produced in the Western and Southern Cape areas of South Africa

Brand, T. S. Smith, N. Hoffman, L. C. (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

Hoffman, L. C. Brand, M. M. Muller, M. Cloete, S. W. P. (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 ...
Characterization of pigeon paramyxoviruses (Newcastle disease virus) isolated in South Africa from 2001 to 2006

Abolnik, C. Gerdes, G. H. Kitching, J. Swanepoel, S. Romito, M. Bisshchop, S. P. R (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 ...
A comparison between the body composition, carcass characteristics and retail cuts of South African mutton Merino and Dormer sheep.

Cloete, J. J .E. Hoffman, L. C. Cloete, S. W. P. Fourie, J. E. (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. ...
Effect of dietary vitamin E on the performance of broilers and quality of broiler meat during refrigerated and frozen storage

Coetzee, G. J. M. Hoffman, L. C. (South African Society for Animal Science, 2001)

Experiment 1 was carried out with 220 one-day-old broiler chicks to evaluate the effect of 11 different levels of vitamin E supplementation (viz. 0 to 200 mg a-tocopheryl acetate/kg diet) on the production performance ...
Effect of hot-deboning on the physical quality characteristics of ostrich meat

Botha, S. St. C. Hoffman, L. C. Britz, T. J. (South African Society for Animal Science, 2006)

The effects of hot-deboning on the physical meat quality characteristics and shelf-life of ostrich m. gastrocnemius, pars interna (gastroc) and m. iliofibularis (iliof) were investigated during 42 days (d) of refrigeration. ...
The effect of rumen inert fat supplementation and protein degradability in starter and finishing diets on veal calf performance

Cruywagen, C. W. Lategan, E. L. Hoffman, L. C. (South African Society for Animal Science, 2003)

Thirty six Holstein bull calves were divided into six groups to determine the effect of protein degradability and rumen inert fat supplementation in starter and finishing diets on nutrient digestibility and veal production. ...
Effect of slaughter age and breed on the carcass traits and meat quality of beef steers finished on natural pastures in the arid subtropics of South Africa

Du Plessis1, I. Hoffman, L. C. (South African Society for Animal Science, 2007)

ABSTRACT: Simmentaler cross (SX), Bonsmara cross (BX) and Nguni (NG) steers were raised on natural sweet veld pastures and slaughtered at 18 or 30 months of age. Slaughtering occurred at the end of the wet summer season. ...
The effects of dietary energy and protein concentrations on ostrich skin quality

Cloete, S. W. P. Van Schalkwyk, S. J. Brand, T. S. Hoffman, L. C. Nel, C. J. (South African Society for Animal Science, 2006)

ABSTRACT: The effects were investigated of energy and protein concentrations (with associated amino acid concentrations) in ostrich diets on leather quality of the skins of 50 ostriches. Energy concentrations were 9.0, ...
Effects of post mortem temperature on rigor tension, shortening and pH in ostrich muscle

Botha, S. StC. Hoffman, L. C. Britz, T. J. (South African Society for Animal Science, 2008)

ABSTRACT: Fully developed rigor mortis in muscle is characterised by maximum loss of extensibility. The course of post mortem changes in ostrich muscle was studied by following isometric tension, shortening and change in ...
Evaluation of subjectively assessed nodule traits of ostrich skins as influenced by slaughter age

Van Schalkwyk, S. J. Cloete, S. W. P. Hoffman, L. C. Meyer, A. (South African Society for Animal Science, 2005)

ABSTRACT: Ostrich skins (n = 214) were assessed by 28 participants involved in the ostrich leather production and marketing chain. The participants were from various sectors in the ostrich industry, including producers, ...
Genetic variation in nodule size at different sites on the skins of slaughter ostriches

Cloete, S. W. P. Van Schalkwyk, S. J. Engelbrecht, A. Hoffman, L. C. (South African Society for Animal Science, 2006)

ABSTRACT: Nodule size is an important indicator of leather quality in the ostrich leather trade. The present study investigated genetic variation in nodule size at five sites on the skin, namely the neck, back, upper leg, ...
A high incidence of species substitution and mislabelling detected in meat products sold in South Africa

Cawthorn, Donna-Maree Steinman, Harris A. Hoffman, Louwrens C. (Elsevier, 2013)

Due to their high market value, meat products are often targets for species substitution and adulteration. DNA-based methods are recognized as the most appropriate means to detect such fraudulent practices, however, these ...
Influence of reproduction traits and pre-weaning growth rate on herd efficiency of different beef breed types in an arid sub-tropical environment

Du Plessis, I. Hoffman, L. C. Calitz, F. J. (South African Society for Animal Science, 2006)

ABSTRACT: The efficiency of Simmentaler cross (SX), Bonsmara cross (BX), Afrikaner (AF) and Nguni (NG) cowherds to produce weaner calves under natural sweetveld conditions was investigated. The respective cowherds were ...
Live weight and reproduction performance of Zimbabwean blue and South African black ostriches

Cloete, S. W. P. Brand, M. M. Hoffman, L. C. Muller, M. (South African Society for Animal Science, 2008)

Data obtained from a pair-mated ostrich flock located at Oudtshoorn in South Africa were used to derive line differences for live weight and reproduction performance in sexually mature ostriches of the Zimbabwean Blue (ZB) ...
Meat quality attributes of night-cropped Impala (Aepyceros melampus)

Hoffman, L. C. (South African Society for Animal Science, 2000)

ABSTRACT:The aim of this experiment was to determine the effect of using a heavy or a light calibre rifle for night cropping of impala (Aepyceros melampus) on meat quality (pH, colour, cooking and drip loss, tenderness). ...
An overview of disease-free buffalo breeding projects with reference to the different systems used in South Africa

Laubscher, Liesel L. Hoffman, Louwrens C. (MDPI AG, 2012-11)

This paper describes the successful national program initiated by the South African government to produce disease-free African buffalo so as to ensure the sustainability of this species due to threats from diseases. ...
Post-mortem changes in the physical meat quality characteristics of refrigerated impala M. longissimus dorsi

Hoffman, L. C. (South African Society for Animal Science, 2004)

The effect of aging the M. longissimus dorsi of 13 impala at 4ºC over a ten-day period was investigated. Large variation between animals was observed for the percentages drip and cooking loss as well as for the CIELab ...
Relative performance and efficiency of five Merino and Merino-type dam lines in a terminal crossbreeding system with Dormer or Suffolk sires

Cloete, S. W. P. Cloete, J. J. E. Herselman, M. J. Hoffman, L. C. (South African Society for Animal Science, 2004)

ABSTRACT: The production performance of ewes was assessed in a terminal crossbreeding experiment involving five Merino and Merino-type dam lines and two terminal crossbreeding sire breeds. Dam lines were SA Mutton Merino ...
Scale effects between body size and limb design in quadrupedal mammals

Kilbourne, Brandon M. Hoffman, Louwrens C. (PLoS, 2013-11)

Recently the metabolic cost of swinging the limbs has been found to be much greater than previously thought, raising the possibility that limb rotational inertia influences the energetics of locomotion. Larger mammals have ...