Publications 2019

Dr C Visser

Peer-reviewed articles:

Van der Zwan, H., Visser, C. & Van der Sluis, R. 2019. Plumage colour variations in the Agapornis genus: A review. Ostrich 90(1), 1-10.

Lashmar, S.F., Muchadeyi, F.C. & Visser, C. 2019. Genotype imputation as a cost-saving genomic strategy for South African Sanga cattle: A review. South African Journal of Animal Science 49, 262-280.

Dlamini, N.M., Visser, C., Snyman, M.A., Soma, P. & Muchadeyi, F.C. 2019. Genomic evaluation of resistance to Haemonchus contortus in a South African Dohne Merino flock. Small Ruminant Research 175, 117-125.

Visser, C. 2019. A review on goats in southern Africa: An untapped genetic resource. Small Ruminant Research 176, 11-16.

Van der Zwan, H., Visser, C., Schoonen, M. & Van der Sluis, R. 2019. Development of an SNP‐based parentage verification panel for lovebirds. Animal Genetics. In Press. https://doi.org/10.1111/age.12859.

Conference contributions:

Lashmar, S.F., Berry, D.P., Pierneef, R., Muchadeyi, F.C & Visser, C. 2019. SNP selection methods to optimize imputation accuracy for South African Drakensberger beef cattle. 37th International Society for Animal genetics Conference, 7-12 July, 2019. Lleida, Spain. Oral presentation by C Visser.

Van der Zwan, H., Visser, C., Schoonen, M. & Van der Sluis, R. 2019. Development of a SNP-based parentage verification panel for lovebirds. 37th International Society for Animal genetics Conference, 7-12 July, 2019. Lleida, Spain. Poster presentation.

Grobler, R., Visser, C. & Van Marle-Köster, E. 2019. Mapping the SCURS locus in the South African Bonsmara beef cattle breed. 37th International Society for Animal genetics Conference, 7-12 July, 2019. Lleida, Spain. Poster presentation.

Limper, J., Visser, C. & Van Marle-Köster, E. 2019. Genomic inbreeding and effective population size of four South African dairy breeds. 51st Congress of the South African Society for Animal Science, 10-12 June, Bloemfontein, South Africa.

 

Prof E van Marle-Koster

Peer-reviewed articles:

Malatji, D.P., van Marle-Köster, E. & Muchadeyi, F.C. 2019. Gene expression profiles of the small intestine - of village chickens from an Ascaridia galli infested environment. Veterinary parasitology 2.

Van der Westhuizen, L., Magwaba, T., Grobler, J.P., Bindeman, H., Du Plessis, C., Van Marle-Koster, E., Neser, F.W.C. 2019. Genetic variability in a population of Letelle sheep in South Africa. South African Journal of Animal Science 49 (2).

Zwane, A.A., Schnabel, R.D., Hoff, J., Choudhury, A., Makgahlela, M.L., Maiwashe, A., Van Marle-Koster, E. & Taylor, J.F. 2019 Genome-Wide SNP discovery in indigenous cattle breeds of South Africa. Frontiers in Genetics. doi: 10.3389/fgene.2019.00273

Conference contributions:

Rosenstrauch, J.M, Van Marle-Köster, E. & Janse van Rensburg, C. 2019. Effect of Bacillus probiotics on microbial gut diversity in weaner pigs. 37th International Society for Animal Genetics Conference 2019. 7 - 12 July, Lleida, Spain.

De Vos, J., Van Marle-Kӧster, E & Berry, D.P. 2019. Genome wide association study of carcass quality using Real Time Ultrasound Scans in South African Nguni cattle. 37th International Society for Animal Genetics Conference 2019.7 - 12 July, Lleida, Spain.

Grobler, R., Visser, C. & E. van Marle-Köster, E., 2019. Mapping the SCURS locus in the South African Bonsmara beef cattle breed. 37th International Society for Animal Genetics Conference 2019. 7 -12 July, Lleida, Spain.    

Gresse, A.U., van Marle-Köster, E & Meissner, H. 2019. Production analyses from a TMR and pasture-based automated milking system in South Africa. 11th Large herds conference, 3-5 June 2019. Boardwalk, Port Elizabeth SA.

Joubert, R & van Marle-Köster, E., 2019. Population structure of a South African Holstein herd based on somatic cell count as indicator trait for mastitis. 11th Large herds conference, 3-5 June 2019. Boardwalk, Port Elizabeth SA.

Linde, D.A,  Vos,J., Okpeku, M & van Marle-Köster, E. 2019. The genomic diversity of Nguni cattle populations from South Africa and Swaziland. 51st South African Society for Animal Science (SASAS) Congress 12 to 14 June 2019, Bloemfontein.

Nkadimeng, M., Van Marle-Köster, E., Mphaphathi, M.L., Ramukhithi, F.V., Maqhashu, A., Tshabalala, M. & Makgahlela, M.L. 2019. Preliminary results on the evaluation of cow reproductive performance of market-oriented smallholder and communal farmers in different bioregions of South Africa. 51st South African Society for Animal Science (SASAS) Congress 12 to 14 June 2019, Bloemfontein.

 

Prof A Hassen

Peer-reviewed articles:

Akanmu, A.M., Hassen, A., Adejoro, F.A. 2020. Gas production, digestibility and efficacy of stored or fresh plant extracts to reduce methane production on different substrates. Animals 10, 146.

Adejoro, F.A., Hassen, A., Akanmu, A.M. & Morgavi, D. 2019. Replacing urea with nitrate as a non-protein nitrogen source increases growth and reduces methane production, while Acacia tannin has no effect in lambs. Animal Feed Science and Technology 114360.

Adejoro, F.A., Hassen, A., Akanmu, A.M. & Morgavi, D. 2019. Effect of lipid-encapsulated Acacia tannin extract on feed intake, nutrient digestibility and methane emission in sheep. Animals 25, 9(11).

Leketa, K., Hassen, A. & Donkin, E.F. & Akanmu, A.M. 2019. Effect of replacing oil seed cake meal with Leucaena leucocephala hay on feed intake, digestibility, growth and carcass quality of Saanen dairy goats. South Africa Journal of Animal Science 49(2).

Adisa, O., Ondego, B., Adeola, A., Botai, C., Hassen, A., Darkey, D. Eyob, T.,  Adisa, A.T. &. Adisa, A.F. 2019. Analysis of drought conditions over major maize producing provinces of South Africa. Journal of Agricultural Meteorology. DOI: 10.2480/agrmet.D-18-00049.

Leketa, K., Hassen, A. & Donkin, A.F. 2019.  Effect of Leucaena leucocephala, as a protein source in a total mixed ration, on milk yield and composition of Saanen milk goats. South Africa Journal of Animal Science (4992) 301-309.

Gracinda, G.A., Carmen, C.M., Garrine, A.P., Hassen, A. & Visser, C. 2019. Impact of supplementation of Moringa oleifera and Leucaena leucacepha tree fodder on the production performance of indigenous goats in Mozambique. Black Sea Journal of Agriculture 2(2) 93-102.

Mangani, R., Tesfamariam, E.H., Engelbrecht, C., Bellocchi, G., Hassen, A. & Mangani, T.R. 2019. Potential Impacts of Extreme Weather Events in Main Maize (Zea mays L.) Producing Areas of South Africa. Regional Environmental Change (On-line published) https://doi.org/10.1007/s10113-019-01486-8 (2018): 3.15

Adejoro, F.A., Hassen, A. & Thantsha, M.S. 2019. Characterization of starch and gum Arabic-maltodextrin microparticles encapsulating Acacia tannin extract and evaluation of their potential use in ruminant nutrition. Asia-Australia Journal of Animal Science, (On-line published) DOI:

Adisa, O.M., Botai, J.O., Adeola, A.M., Hassen, A., Botai, C.M., Darkey, D., Tesfamariam, E. 2019. Application of artificial neural network for predicting maize production in South Africa. Sustainability 11(4) 1145.

Conference contributions:

Akanmu, A.M. & Hassen, A. 2019. Plant extracts reduced enteric methane emission with increased growth performance and nutrient digestibility in Merino sheep. Poster presentation at the 7th Greenhouse Gas and Animal Agriculture Conference 4-10th August 2019 Foz do Iguassu, Brazil

Adejoro, F.A., Hassen, A., Akanmu, A.M. & Diego, M. 2019. Replacing urea with nitrate increase growth and reduce enteric methane production in sheep. Poster presentation at the 7th Greenhouse Gas and Animal Agriculture Conference 4-10th August 2019 Foz do Iguassu, Brazil

Akanmu, A.M. & Hassen, A. 2019. Storage did not affect plant extracts potency on methane reduction and in vitro organic matter digestibility, but efficacy is substrate dependent. Poster presentation at the 51st SASAS congress June 10-12, Bloemfontein, South Africa

Davis, J.M., Hassen, A. & Akanmu, A.M. 2019. In vitro methane and gas production characteristics of Eragrostis curvula hay supplemented with seven South African plant extract additives. Oral presentation at the 51st SASAS congress June 10-12, Bloemfontein, South Africa

Selzer, K., Hassen, A. & Akanmu, A.M. 2019. Effect of supplementing different proportions of cellulase and xylanase enzyme mixtures on intake and digestibility of high forage total mixed ration by sheep. Oral presentation at the 51st SASAS congress June 10-12, Bloemfontein, South Africa

Ahmed, O.M., Hassen, A. & Lehloenya, K.C. 2019. Effect of β-carotene supplementation on production and reproduction traits in Merino (Ovis aries) ewes. Poster presentation at the 51st SASAS congress June 10-12, Bloemfontein, South Africa

Ibrahim, S.L.  & Hassen, A. 2019 Influence of purified Black wattle (Acacia mearnsii) tannin on in vitro gas, methane and organic matter digestibility of Eragrostis curvula hay. Oral presentation at the 51st SASAS congress June 10-12, Bloemfontein, South Africa

Svinurai, W., Hassen, A. Tesfamariam, E. & Ramoelo, A. 2019. Parameterisation and evaluation of the Sustainable Grazing Systems pasture simulation model for predicting native grass growth in a southern African savanna. Oral paper presented during the Grassland Society of Southern Africa 43rd conference held from 30 June - 04 July 2019, in 1 Olifantshoek Road, Keidebees, Upington, Northern Cape, South Africa

Mlaza, N., Tefera, S. & Hassen, A. 2019. Vegetation, soil, and cattle blood mineral status in severely and less severely degraded semi-arid communal rangelands of the Eastern Cape, South Africa (2019). Poster paper presented during the Grassland Society of Southern Africa 43rd conference held from 30 June - 04 July 2019, in 1 Olifantshoek Road, Keidebees, Upington, Northern Cape, South Africa

Mazule, L., Tefera, S., Hassen, A. & Tilllard, E. 2019. Predicting the variability and chemical composition of fresh forage by using three different devices of near-infrared spectroscopy. Poster paper presented during the Grassland Society of Southern Africa 43rd conference held from 30 June - 04 July 2019, in 1 Olifantshoek Road, Keidebees, Upington, Northern Cape, South Africa

Magandana, T., Hassen, A. & Tesfamariam, E. 2019. Effect of rainfall interception, resting and season on rangeland productivity in the semi-arid grasslands of South Africa. Oral paper presented during the Grassland Society of Southern Africa 43rd conference held from 30 June - 04 July 2019, in 1 Olifantshoek Road, Keidebees, Upington, Northern Cape, South Africa

 

Dr C Jansen van Rensburg

Peer-reviewed articles:

Ramlucken, U., Ramchuran, S.O., Moonsamy G., Lalloo R., Thantsha, M.S. & Jansen van Rensburg, C. 2019. A novel Bacillus based multi-strain probiotic improves growth performance and intestinal properties of Clostridium perfringens challenged broilers. Poultry Science. Published online: 19 August 2019: https://doi.org/10.3382/ps/pez496. In Press

Conference contributions:

Rosenstrauch, J.M., Van Marle-Köster, E. & Jansen van Rensburg, C. 2019. Effect of Bacillus probiotics on microbial gut diversity in weaner pigs. 37th International Society for Animal Genetics Conference, July, 2019, Lleida, Spain

 

Prof EC Webb

Peer-reviewed articles:

McCrindle, C.M.E., Maime, M.J., Botha, E.A., Webb, E.C., & Smuts, M.P. 2019. Scrotal tick damage as a cause of infertility in communal bulls in Moretele, South Africa. Journal of the South African Veterinary Association 90.

Agbeniga, B. & Webb, E.C. 2019. Effects of timing and duration of low voltage electrical stimulation on selected meat quality characteristics of light and heavy bovine carcasses. Animal Production Science (Accepted).

Biraimah, A.D.A., Mohammed, A.M. & Webb, E.C. 2019. Effects of electrical stimulation and age at slaughter on carcass and meat quality of two Sudanese Baggara beef types. South African Journal of Animal Science 49(5).

Van Marle-Koster, E., Pretorius, S.J. & Webb, E.C. 2019. Morphological and physiological characteristics of claw quality in South African Bonsmara cattle. South African Journal of Animal Science 49 (5).

Tanganyika, J., Webb, E.C. 2019. Sensory characteristics of native Muscovy duck meat in Malawi. Livestock Research for Rural Development 31(5).

Mkhize, F.N., Webb, E.C. & Scholtz, M.M. 2019. Effects of non-genetic factors on the inter-calving period of Nguni cows in South Africa. South African Journal of Animal Science 48(6).

Conference contributions:

Du Preez, A.M., Webb, E.C. & Van Niekerk, W.A. 2019. Effects of extensive-intensive feeding system on gonadal development, scrotal fat deposition and semen quality of Döhne Merino, Merino and SA Mutton Merino rams – Presentation at 51st SASAS annual conference, 11 June 2019, Bloemfontein, South Africa

Du Preez, A.M., Webb, E.C. & Van Niekerk, W.A. 2019. Effects of feeding systems on thermoregulation and semen quality of Merino and SA Mutton Merino rams – Poster at EAAP 70th annual conference, 26 August 2019, Ghent, Belgium

Du Preez, A.M., Webb, E.C. & Van Niekerk, W.A., 2019. Effects of feeding systems on gonadal development, scrotal fat accumulation and semen quality of rams of different Merino breed types – Presentation at ISRP conference, 3 September 2019, Leipzig, Germany

 

Prof LJ Erasmus

Peer-reviewed articles:

Du Toit, C.J.L., Van Niekerk, W.A., Meissner, H.H., Erasmus, L.J. & Morey, L. 2019. Methanogenic potential of commonly utilised South African subtropical and temperate grass species as influenced by nitrogen fertilisation. Crop and Pasture Science 70(1) 68-76 https://doi.org/10.1071/CP182930.

Van Wyngaard, J.D.V., Meeske, R. & Erasmus, L.J.  2019. Effect of dietary nitrate on enteric methane emissions, production performance and rumen fermentation of dairy cows grazing ryegrass pasture during spring. Animal Feed Science and Technology 2(June 2019) 64-73.

Conference contributions:

Erasmus, L.J. & de Vos, C. 2019. Effect of feed additive on rumen bacterial amino acid profiles in dairy cows. Presentation at the 51st SASAS congress June 10-12, Bloemfontein South Africa

Mynhardt, H., Van Niekerk, W.A., Erasmus, L.J., Coertse, R.J. & Du Toit, C.J.L. 2019. Supplementation of sheep fed low-quality Eragrostis curvula: a meta-analytical study. 70th Annual meeting of the European federation of Animal Science. Ghent, Belgium 26th to 30th August 2019

 

Dr T Nkukwana

Conference contributions:

Mbukwane, M.J., Nkukwana, T.T. & Plumstead, P.W. 2019. Variability on sunflower meal and the effect of exogenous enzymes on broiler chickens. The 3rd International Symposium on Alternatives to Antibiotics (ATA) 2019. Challenges and Solutions in Animal Health and Production, 16-18 December 2019, The Berkeley Hotel, Bangkok, Thailand

 

Dr CJL du Toit

Peer-reviewed articles:

Cornelius, J.L., Du Toit, M., Van Niekerk, W.A., Meissner, H.H., Erasmus, L.J. & Morey, L. 2019. Methanogenic potential of commonly utilised South African subtropical and temperate grass species as influenced by nitrogen fertilisation. Crop and Pasture Science 70(1) 68-76 https://doi.org/10.1071/CP18293.

Conference contributions:

Lynch, K., Du Toit, C.J.L, Van Niekerk, W.A. & Coertse, R. 2019. Surface methane and nitrous oxide emissions from a commercial beef feedlot in South Africa. 70th Annual meeting of the European federation of Animal Science. Ghent, Belgium 26th to 30th August 2019

Mynhardt, H., Van Niekerk, W.A., Erasmus, L.J., Coertse, R.J. & Du Toit, C.J.L. 2019. Supplementation of sheep fed low-quality Eragrostis curvula: a meta-analytical study. 70th Annual meeting of the European federation of Animal Science. Ghent, Belgium 26th to 30th August 2019

 

Dr A Akanmu

Peer-reviewed articles:

Akanmu, A.M., Hassen, A. & Adejoro, F.A. 2020. Gas production, digestibility and efficacy of stored or fresh plant extracts to reduce methane production on different substrates. Animals 10, 146.

Adejoro, F.A., Hassen, A., Akanmu, A.M. & Morgavi, D.P. 2020. Replacing urea with nitrate as a non-protein nitrogen source, with or without tannin, increase growth and reduce methane production in merino lambs. Animal Feed Science and Technology 2020, 114360.

Adejoro, F.A., Hassen, A., Akanmu, A.M. 2019. Effect of Lipid-Encapsulated Acacia Tannin Extract on Feed Intake, Nutrient Digestibility and Methane Emission in Sheep. Animals 9, 863:1-13.

Leketa, K., Hassen, A., Donkin, E.F. & Akanmu, A.M. 2019. Substitution of Leucaena hay for oil seed cake meal in total mixed rations for goats. .South African Journal of Animal Science 49(2).

Leketa, K., Donkin, E.F., Hassen, A. & Akanmu, A.M., 2019. Effect of Leucaena leucocephala, as a protein source in a total mixed ration, on milk yield and composition of Saanen milk goats. South African Journal of Animal Science 49(2), 301-309.

Conference contributions:

Akanmu, A.M. & Hassen, A. 2019. Plant extracts reduced enteric methane emission with increased growth performance and nutrient digestibility in Merino sheep. Poster presentation at the 7th Greenhouse Gas and Animal Agriculture Conference 4-10th August 2019 Foz do Iguassu, Brazil

Adejoro, F.A., Hassen, A., Akanmu, A.M. & Diego, M. 2019. Replacing urea with nitrate increase growth and reduce enteric methane production in sheep. Poster presentation at the 7th Greenhouse Gas and Animal Agriculture Conference 4-10th August 2019 Foz do Iguassu, Brazil

Akanmu, A.M. & Hassen, A. 2019. Storage did not affect plant extracts potency on methane reduction and in vitro organic matter digestibility, but efficacy is substrate dependent. Poster presentation at the 51st SASAS congress June 10-12, Bloemfontein, South Africa

Davis, J.M., Hassen, A. & Akanmu, A.M. 2019. In vitro methane and gas production characteristics of Eragrostis curvula hay supplemented with seven South African plant extract additives. Oral presentation at the 51st SASAS congress June 10-12, Bloemfontein, South Africa

Selzer, K., Hassen, A. & Akanmu, A.M. 2019. Effect of supplementing different proportions of cellulase and xylanase enzyme mixtures on intake and digestibility of high forage total mixed ration by sheep. Oral presentation at the 51st SASAS congress June 10-12, Bloemfontein, South Africa

 

Dr A Maqhashu

Peer-reviewed articles:

Maqhashu, A., Mphaphathi, M.L., Sebei, P.J., Raphulu, T, Ramukhithi, F.V., Nthakheni, N.D., Bovula, N., Mapholi, N.O., Nephawe, K.A., O’ Neill, H.A. & Nedambale, T.L. 2019. Assessment of genetic variation within Bapedi sheep using microsatellite markers. In press: South African Journal of Animal Sciences.

Conference contributions:

Maqhashu, A., Mphaphathi, M.L., Sebei, P.J., Raphulu, T, Ramukhithi, F.V., Bovula, N., Mapholi, N.O., Nephawe, K.A., O’ Neill, H.A. & Nedambale, T.L. 2019. Reproduction performance of Bapedi ewes following oestrous synchronisation and natural mating in different conservation farms. South African Society for Animal Sciences, Bloemfontein, South Africa from 10-12 June 2019

Maqhashu, A., Mphaphathi, M.L., Sebei, P.J., Raphulu, T, Ramukhithi, F.V., Nthakheni, N.D., Bovula, N., Mapholi, N.O., Nephawe, K.A., O’ Neill, H.A. & Nedambale, T.L. 2019. Influence of age and body condition score on oestrous synchronization response in Bapedi In: Proceedings of All Africa Conference in Animal Agriculture, Accra, Ghana from 28 July to 2nd August 2019.

 

Ms A Du Preez

Conference contributions:

Du Preez, A.M., Webb, E.C. & Van Niekerk, W.A. 2019. Effects of extensive-intensive feeding system on gonadal development, scrotal fat deposition and semen quality of Döhne Merino, Merino and SA Mutton Merino rams – Presentation at 51st SASAS annual conference, 11 June 2019, Bloemfontein, South Africa

Du Preez, A.M., Webb, E.C. & Van Niekerk, W.A. 2019. Effects of feeding systems on thermoregulation and semen quality of Merino and SA Mutton Merino rams – Poster at EAAP 70th annual conference, 26 August 2019, Ghent, Belgium

Du Preez, A.M., Webb, E.C. & Van Niekerk, W.A. 2019. Effects of feeding systems on gonadal development, scrotal fat accumulation and semen quality of rams of different Merino breed types – Presentation at ISRP conference, 3 September 2019, Leipzig, Germany

Published by Gertruida Erasmus

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