You are here: University of Sydney / Faculty of Veterinary Science / Academic Staff / Associate Professor Aaron Cowieson 

Associate Professor Aaron Cowieson

BTechnol(Hons), MSc, PhD
Director - Poultry Research Foundation  

C01A - Jl Shute - Camden
The University of Sydney

Telephone 93511612

Biographical details

Career History
2001-2003 ¿ Scottish Agricultural College. 2003-2008 ¿ Danisco Animal Nutrition. 2008-2010 ¿ AB Vista Feed Ingredients. 2010-present University of Sydney.
Back to Top

Research interests

Related to dietary phytate, exogenous enzyme supplementation, ingredient quality, poultry production, health and nutrition.
Back to Top

Teaching and supervision

Poultry nutrition; Feed technology; Feed additive biochemistry.
Back to Top

Themes

Animal Production; Animal Health

Back to Top

Selected grants

2013

  • Travel Funding for Australian Poultry Science Symposium 2013; Cowieson A; Australian Egg Corporation Ltd/Travel Support.
  • 2013 Australian Poultry Science Symposium Sponsorship; Cowieson A; Rural Industries Research and Development Corporation/Travel Support.

2012

  • Separate feeding of calcium for poultry; Cowieson A; Australian Egg Corporation Ltd/Innovation & Efficiency RD&E Open Call.
  • 2012 Australian Poultry Science Symposium; Cowieson A; Rural Industries Research and Development Corporation/Travel Support.
  • 2012 Australian Poultry Science Symposium; Cowieson A; Australian Egg Corporation Ltd/Travel Support.
  • Baiada Poultry Ltd Cowieson; Cowieson A; Baiada Poultry Ltd/Research Donation.

2011

  • Dislocated calcium alimentation for broilers; Cowieson A; Rural Industries Research and Development Corporation/Research Priorities Program.
  • Sponsorship of 2011 Australian Poultry Science Symposium - invited speaker Prof. Borges (Brazil) and the sorghum session; Cowieson A; Rural Industries Research and Development Corporation/Travel Support.
  • 2011 Australian Poultry Science Symposium - Professors Moran and Angel; Cowieson A; Australian Egg Corporation Ltd/Travel Support.

2010

  • Poultry Research Foundation Directorship and National Poultry R,D&E Capacity Building Project; Cowieson A; Australian Egg Corporation Ltd/Poultry Chair.
  • Part funding of Director Poultry Research Foundation A. Cowieson; Cowieson A; Rural Industries Research and Development Corporation/Research Priorities Program.
Back to Top

Selected publications

Download citations: PDF RTF Endnote

Journals

  • Wilkerson, S., Walk, C., Bedford, M., Cowieson, A. (2013). Influence of conditioning temperature on the postpellet recovery and efficacy of 2 microbial phytases for broiler chicks. The Journal of Applied Poultry Research, 22, 308-313.
  • Courtney Jones, S., Cowieson, A., Williamson, S., Munn, A. (2013). No effect of short-term exposure to high fibre diets on the gastrointestinal morphology of layer hens (Gallus gallus domesticus) : body reserves are used to manage energy deficits in favour of phenotypic plasticity. Journal of Animal Physiology and Animal Nutrition.
  • Courtney Jones, S., Cowieson, A., Williamson, S., Munn, A. (2013). No effect of short-term exposure to high-fibre diets on the gastrointestinal morphology of layer hens (Gallus gallus domesticus): Body reserves are used to manage energy deficits in favour of phenotypic plasticity. Journal of Animal Physiology and Animal Nutrition.
  • Gehring, C., Bedford, M., Cowieson, A., Dozier 111, W. (2012). Effects of corn source on the relationship between in vitro assays and ileal nutrient digestibility. Poultry Science, 91(8), 1908-1914.
  • Bedford, M., Cowieson, A. (2012). Exogenous Enzymes and their effects on Intestinal microbiology. Animal Feed Science and Technology, 173(1-2), 76-85.
  • Wilkerson, S., Selle, P., Bedford, M., Cowieson, A. (2012). Exploiting Calcium-specific appetite in poultry nutrition. Worlds Poultry Science Journal, 67(4), 587-598.
  • Yu, S., Cowieson, A., Gilbert, C., Plumstead, P., Dalsgaard, S. (2012). Interactions of phytate and myo-inositol phosphate esters (IP1-5) including IP5 isomers with dietary protein and iron and inhibition of pepsin. Journal of Animal Science: leading source of new knowledge and perspectives in animal science, 90(6), 1824-1832.
  • Olukosi, O., Bolarinwa, O., Cowieson, A., Adeola, O. (2012). Marker type but not concentration influenced apparent ileal amino acid digestibility in phytase-supplemented diets for broiler chickens and pigs. Journal of Animal Science: leading source of new knowledge and perspectives in animal science, 90(12), 4414-4420.
  • Selle, P., Cowieson, A., Cowieson, N., Ravindran, V. (2012). Protein-phytate interactions in pig and poultry nutrition: a reappraisal. Nutrition Research Reviews, 25(1), 1-17.
  • Selle, P., Liu, S., Cai, J., Cowieson, A. (2012). Steam-pelleting and feed form of broiler diets based on three coarsely ground sorghums influences growth performance, nutrient utilisation, starch and nitrogen digestibility. Animal Production Science, 52(9), 842-852.
  • Adeola, O., Cowieson, A. (2011). BOARD-INVITED REVIEW: Opportunities and challenges in using exogenous enzymes to improve nonruminant animal production. Journal of Animal Science: leading source of new knowledge and perspectives in animal science, 89, 3189-3218.
  • Walk, C., Cowieson, A., Remus, J., Novak, C., McElroy, A. (2011). Effects of dietary enzymes on performance and intestinal goblet cell number of broilers exposed to a live coccidia oocyst vaccine. Poultry Science, 90(1), 91-98.
  • Wilkinson, S., Selle, P., Bedford, M., Cowieson, A. (2011). Exploiting calcium-specific appetite in poultry nutrition. Worlds Poultry Science Journal, 67, 587-598.
  • Cowieson, A., Bedford, M., Ravindran, V., Selle, P. (2011). Increased dietary sodium chloride concentrations reduce endogenous amino acid flow and influence the physiological response to the ingestion of phytic acid by broiler chickens. British Poultry Science, 52(5-6), 613-624.
  • Cowieson, A., Wilcock, P., Bedford, M. (2011). Super-dosing effects of phytase in poultry and other monogastrics. Worlds Poultry Science Journal, 67(2), 225-235.
  • Cowieson, A., Bedford, M., Ravindran, V. (2010). Interactions between xylanase and glucanase in maize-soy-based diets for broilers. British Poultry Science, 51(2), 246-257.
  • Cowieson, A. (2010). Stategic Selection of Exogenous Enzymes for Corn/soy-based Poultry Diets. Journal of Poultry Science, 47(1), 1-7.
  • Selle, P., Cowieson, A., Ravindran, V. (2009). Consequences of calcium interactions with phytate and phytase for poultry and pigs. Livestock Science, 124(1-3), 126-141.
  • Woyengo, T., Cowieson, A., Adeola, O., Nyachoti, C. (2009). Ileal digestibility and endogenous flow of minerals and amino acids: responses to dietary phytic acid in piglets. The British Journal of Nutrition, 102(3), 428-433.
  • Shakouri, M., Iji, P., Mikkelsen, L., Cowieson, A. (2009). Intestinal function and gut microflora of broiler chickens as influenced by cereal grains and microbial enzyme supplementation. Journal of Animal Physiology and Animal Nutrition, 93(5), 647-658.
  • Cowieson, A., Bedford, M., Selle, P., Ravindran, V. (2009). Phytate and microbial phytase: implications for endogenous nitrogen losses and nutrient availability. Worlds Poultry Science Journal, 65(3), 401-418.
  • Cowieson, A., Bedford, M. (2009). The effect of phytase and carbohydrase on ileal amino acid digestibility in monogastric diets: Complimentary mode of action? Worlds Poultry Science Journal, 65(4), 609-624.
  • Liu, N., Ru, Y., Li, F., Cowieson, A. (2008). Effect of diet containing phytate and phytase on the activity and messenger ribonucleic acid expression of carbohydrase and transporter in chickens. Journal of Animal Science: leading source of new knowledge and perspectives in animal science, 86(12), 3432-3439.
  • Cowieson, A., Ravindran, V. (2008). Effect of exogenous enzymes in maize-based diets varying in nutrient density for young broilers: Growth performance and digestibility of energy, minerals and amino acids. British Poultry Science, 49(1), 37-44.
  • Liu, N., Ru, Y., Cowieson, A., Li, F., Cheng, X. (2008). Effects of phytate and phytase on the performance and immune function of broilers fed nutritionally marginal diets. Poultry Science, 87(6), 1105-1111.
  • Olukosi, O., Cowieson, A., Adeola, O. (2008). Energy utilization and growth performance of broilers receiving diets supplemented with enzymes containing carbohydrase or phytase activity individually or in combination. The British Journal of Nutrition, 99(3), 682-690.
  • Ravindran, V., Cowieson, A., Selle, P. (2008). Influence of dietary electrolyte balance and microbial phytase on growth performance, nutrient utilization, and excreta quality of broiler chickens. Poultry Science, 87(4), 677-688.
  • Cowieson, A., Ravindran, V., Selle, P. (2008). Influence of dietary phytic acid and source of microbial phytase on ileal endogenous amino acid flows in broiler chickens. Poultry Science, 87(11), 2287-2299.
  • Olukosi, O., Cowieson, A., Adeola, O. (2008). Influence of enzyme supplementation of maize-soyabean meal diets on carcase composition, whole-body nutrient accretion and total tract nutrient retention of broilers. British Poultry Science, 49(4), 436-445.
  • Cowieson, A., Ravindran, V. (2008). Sensitivity of broiler starters to three doses of an enzyme cocktail in maize-based diets. British Poultry Science, 49(3), 340-346.
  • Olukosi, O., Cowieson, A., Adeola, O. (2007). Age-related influence of a cocktail of xylanase, amylase, and protease or phytase individually or in combination in broilers. Poultry Science, 86(1), 77-86.
  • Cowieson, A., Ravindran, V. (2007). Effect of phytic acid and microbial phytase on the flow and amino acid composition of endogenous protein at the terminal ileum of growing broiler chickens. The British Journal of Nutrition, 98(4), 745-752.
  • Cowieson, A., Hruby, M., Pierson, E. (2006). Evolving enzyme technology: Impact on commercial poultry nutrition. Nutrition Research Reviews, 19(1), 90-103.
  • Cowieson, A., Acamovic, T., Bedford, M. (2006). Phytic acid and phytase: Implications for protein utilization by poultry. Poultry Science, 85(5), 878-885.
  • Cowieson, A., Singh, D., Adeola, O. (2006). Prediction of ingredient quality and the effect of a combination of xylanase, amylase, protease and phytase in the diets of broiler chicks. 2. Energy and nutrient utilisation. British Poultry Science, 47(4), 490-500.
  • Cowieson, A., Acamovic, T., Bedford, M. (2006). Supplementation of corn-soy-based diets with an Eschericia coli-derived phytase: Effects on broiler chick performance and the digestibility of amino acids and metabolizability of minerals and energy. Poultry Science, 85(8), 1389-1397.
  • Cowieson, A., Acamovic, T., Bedford, M. (2006). Using the precision-feeding bioassay to determine the efficacy of exogenous enzymes-A new perspective. Animal Feed Science and Technology, 129(1-2), 149-158.
  • Cowieson, A., Adeola, O. (2005). Carbohydrases, protease, and phytase have an additive beneficial effect in nutritionally marginal diets for broiler chicks. Poultry Science, 84(12), 1860-1867.
  • Cowieson, A. (2005). Factors that affect the nutritional value of maize for broilers. Animal Feed Science and Technology, 119(3-4), 293-305.
  • Cowieson, A., Hruby, M., Faurschou Isaksen, M. (2005). The effect of conditioning temperature and exogenous xylanase addition on the viscosity of wheat-based diets and the performance of broiler chickens. British Poultry Science, 46(6), 717-724.
  • Shanmugavelu, S., Brooker, J., Acamovic, T., Cowieson, A. (2004). Effect of thyme oil and garlic powder on microbial fermentation in various sections of the gastrointestinal tract of broilers. British Poultry Science, 45(S1), S9-S10.
  • Shanmugavelu, S., Acamovic, T., Cowieson, A. (2004). Effect of thyme oil and garlic powder on the nutritive value of soybean meal. British Poultry Science, 45(SUP 1), S54-S55.
  • Cowieson, A., Acamovic, T., Bedford, M. (2004). The effects of phytase and phytic acid on the loss of endogenous amino acids and minerals from broiler chickens. British Poultry Science, 45(1), 101-108.
  • Cowieson, A., Acamovic, T., Bedford, M. (2004). The effects of supplementation of maize-based diets with exogenous phytase on amino acid digestibility and nitrogen retention by young broiler chicks. British Poultry Science, 45(Sup 1), S5-S6.
  • Cowieson, A., Acamovic, T., Bedford, M. (2003). Phytic acid and the implications for protein utilisation by poultry. British Poultry Science, 44(SUP 1), S36-S37.
  • Cowieson, A., Acamovic, T., Bedford, M. (2003). Supplementation of diets containing pea meal with exogenous enzymes: Effects on weight gain, feed conversion, nutrient digestibility and gross morphology of the gastrointestinal tract of growing broiler chicks. British Poultry Science, 44(3), 427-437.
  • Cowieson, A., Acamovic, T., Bedford, M. (2003). The effect of phytase and phytic acid on endogenous losses from broiler chickens. British Poultry Science, 44(1), 23-24.
  • Cowieson, A., Acamovic, T. (2001). Effect of enzyme supplementation on the nutritional value of Camelina sativa meal for broilers. British Poultry Science, 42(SUP 1), S88-S89.
  • Cowieson, A., Acamovic, T. (2001). Metabolisable energy and digestibility coefficients of DM and N, of pea (Pisum sativum) and lupin (Lupinus albus) meals for broilers. British Poultry Science, 42(Sup 1), S86-S87.

Conferences

  • Wilkinson, S., Bradbury, E., Thomson, P., Simpson, S., Cowieson, A. (2013). Calcium and phosphorus interactions in broiler nutrition: a Geometric framework approach. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Wilkinson, S., Bradbury, E., Thomson, P., Simpson, S., Cowieson, A. (2013). Calcium and phosphorus interactions in broiler nutrition: A geometric framework approach. 24th Annual Australian Poultry Science Symposium, Sydney: N/A.
  • Selle, P., Celi, P., Cowieson, A. (2013). Effects of organic selenium on growth performance, nutrient utilisation and selenium tissue concentrations in broiler chickens. 24th Annual Australian Poultry Science Symposium, Sydney: N/A.
  • Wilkinson, S., Ruth, B., Cowieson, A. (2013). Mineral composition of calcium sources used by the Australian Poultry feed industry. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Wilkinson, S., Ruth, B., Cowieson, A. (2013). Mineral composition of calcium sources used by the Australian poultry industry. 24th Annual Australian Poultry Science Symposium, Sydney: N/A.
  • Bradbury, E., Wilkinson, S., Cronin, G., Walk, C., Cowieson, A. (2013). The Effect of marine calcium source on broiler leg integrity. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Celi, P., Selle, P., Cowieson, A. (2013). The effects of dietary supplementation with different organic selenium sources on oxidative stress in broilers. 24th Annual Australian Poultry Science Symposium, Sydney: N/A.
  • Bradbury, E., Wilkinson, S., Cronin, G., Thomson, P., Sacranie, A., Cowieson, A. (2013). Using the geometric framework to explore calcium and phosphorus interactions and the effect on broiler welfare. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Bao, Y., Romero, L., Cowieson, A. (2012). A Systematic Geometric Approach to the Prediction of Feed Enzyme Efficiency in Broilers. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Durali, T., Groves, P., Cowieson, A. (2012). Comparison of Performance of Commercial Conventional and Free Range Broilers. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Wilkinson, S., Selle, P., Bedford, M., Cowieson, A. (2012). Exploiting the Calcium Specific Appetite of Broilers. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Cowieson, A., Wilkinson, S., Bradbury, E., Bedford, M. (2012). Exploration of calcium and phosphorus interactions in broilers through nutritional geometry. New Zealand Poultry Industry Conference,, N/A: N/A.
  • Liu, S., Selle, P., Peron, A., Cadogan, D., Gill, R., Cowieson, A. (2012). Microbial Phytase Influences Kinetics of Starch -Protein Digestion in Broiler Chickens. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Liu, S., Selle, P., Cowieson, A. (2012). Prediction of in vivo Starch Digestability Responses to Phytase Supplimentation by in vitro Starch Hydrolysis. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Bradbury, E., Wilkinson, S., Cronin, G., Walk, C., Cowieson, A. (2012). The effect of a marine calcium source on broiler leg integrity. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Browning, L., Antipatis, C., Cowieson, A. (2012). The Interactive Effects of Vitamin D, Phytase, Calcium, and Phosphorus in Broiler Performance and Skeletal Integrity. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Cowieson, A., Cowieson, N. (2011). Phytate and the Thermodynamics of Water. 22nd Annual Poultry Science Symposium, Sydney: Poultry Research Foundation, University of Sydney.
  • Cowieson, A., Selle, P. (2011). The Environmental Impact of low Feed Conversion Ratios in Poultry. Recent Advances in Animal Nutrition - Australia (RAAN 2011), University of New England: University of New England.

2013

  • Wilkinson, S., Bradbury, E., Thomson, P., Simpson, S., Cowieson, A. (2013). Calcium and phosphorus interactions in broiler nutrition: a Geometric framework approach. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Wilkinson, S., Bradbury, E., Thomson, P., Simpson, S., Cowieson, A. (2013). Calcium and phosphorus interactions in broiler nutrition: A geometric framework approach. 24th Annual Australian Poultry Science Symposium, Sydney: N/A.
  • Selle, P., Celi, P., Cowieson, A. (2013). Effects of organic selenium on growth performance, nutrient utilisation and selenium tissue concentrations in broiler chickens. 24th Annual Australian Poultry Science Symposium, Sydney: N/A.
  • Wilkerson, S., Walk, C., Bedford, M., Cowieson, A. (2013). Influence of conditioning temperature on the postpellet recovery and efficacy of 2 microbial phytases for broiler chicks. The Journal of Applied Poultry Research, 22, 308-313.
  • Wilkinson, S., Ruth, B., Cowieson, A. (2013). Mineral composition of calcium sources used by the Australian Poultry feed industry. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Wilkinson, S., Ruth, B., Cowieson, A. (2013). Mineral composition of calcium sources used by the Australian poultry industry. 24th Annual Australian Poultry Science Symposium, Sydney: N/A.
  • Courtney Jones, S., Cowieson, A., Williamson, S., Munn, A. (2013). No effect of short-term exposure to high fibre diets on the gastrointestinal morphology of layer hens (Gallus gallus domesticus) : body reserves are used to manage energy deficits in favour of phenotypic plasticity. Journal of Animal Physiology and Animal Nutrition.
  • Courtney Jones, S., Cowieson, A., Williamson, S., Munn, A. (2013). No effect of short-term exposure to high-fibre diets on the gastrointestinal morphology of layer hens (Gallus gallus domesticus): Body reserves are used to manage energy deficits in favour of phenotypic plasticity. Journal of Animal Physiology and Animal Nutrition.
  • Bradbury, E., Wilkinson, S., Cronin, G., Walk, C., Cowieson, A. (2013). The Effect of marine calcium source on broiler leg integrity. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Celi, P., Selle, P., Cowieson, A. (2013). The effects of dietary supplementation with different organic selenium sources on oxidative stress in broilers. 24th Annual Australian Poultry Science Symposium, Sydney: N/A.
  • Bradbury, E., Wilkinson, S., Cronin, G., Thomson, P., Sacranie, A., Cowieson, A. (2013). Using the geometric framework to explore calcium and phosphorus interactions and the effect on broiler welfare. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.

2012

  • Bao, Y., Romero, L., Cowieson, A. (2012). A Systematic Geometric Approach to the Prediction of Feed Enzyme Efficiency in Broilers. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Durali, T., Groves, P., Cowieson, A. (2012). Comparison of Performance of Commercial Conventional and Free Range Broilers. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Gehring, C., Bedford, M., Cowieson, A., Dozier 111, W. (2012). Effects of corn source on the relationship between in vitro assays and ileal nutrient digestibility. Poultry Science, 91(8), 1908-1914.
  • Bedford, M., Cowieson, A. (2012). Exogenous Enzymes and their effects on Intestinal microbiology. Animal Feed Science and Technology, 173(1-2), 76-85.
  • Wilkerson, S., Selle, P., Bedford, M., Cowieson, A. (2012). Exploiting Calcium-specific appetite in poultry nutrition. Worlds Poultry Science Journal, 67(4), 587-598.
  • Wilkinson, S., Selle, P., Bedford, M., Cowieson, A. (2012). Exploiting the Calcium Specific Appetite of Broilers. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Cowieson, A., Wilkinson, S., Bradbury, E., Bedford, M. (2012). Exploration of calcium and phosphorus interactions in broilers through nutritional geometry. New Zealand Poultry Industry Conference,, N/A: N/A.
  • Yu, S., Cowieson, A., Gilbert, C., Plumstead, P., Dalsgaard, S. (2012). Interactions of phytate and myo-inositol phosphate esters (IP1-5) including IP5 isomers with dietary protein and iron and inhibition of pepsin. Journal of Animal Science: leading source of new knowledge and perspectives in animal science, 90(6), 1824-1832.
  • Olukosi, O., Bolarinwa, O., Cowieson, A., Adeola, O. (2012). Marker type but not concentration influenced apparent ileal amino acid digestibility in phytase-supplemented diets for broiler chickens and pigs. Journal of Animal Science: leading source of new knowledge and perspectives in animal science, 90(12), 4414-4420.
  • Liu, S., Selle, P., Peron, A., Cadogan, D., Gill, R., Cowieson, A. (2012). Microbial Phytase Influences Kinetics of Starch -Protein Digestion in Broiler Chickens. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Liu, S., Selle, P., Cowieson, A. (2012). Prediction of in vivo Starch Digestability Responses to Phytase Supplimentation by in vitro Starch Hydrolysis. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Selle, P., Cowieson, A., Cowieson, N., Ravindran, V. (2012). Protein-phytate interactions in pig and poultry nutrition: a reappraisal. Nutrition Research Reviews, 25(1), 1-17.
  • Selle, P., Liu, S., Cai, J., Cowieson, A. (2012). Steam-pelleting and feed form of broiler diets based on three coarsely ground sorghums influences growth performance, nutrient utilisation, starch and nitrogen digestibility. Animal Production Science, 52(9), 842-852.
  • Bradbury, E., Wilkinson, S., Cronin, G., Walk, C., Cowieson, A. (2012). The effect of a marine calcium source on broiler leg integrity. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.
  • Browning, L., Antipatis, C., Cowieson, A. (2012). The Interactive Effects of Vitamin D, Phytase, Calcium, and Phosphorus in Broiler Performance and Skeletal Integrity. 23rd Annual Australian Poultry Science Symposium, Sydney, Australia: Poultry Research Foundation, University of Sydney.

2011

  • Adeola, O., Cowieson, A. (2011). BOARD-INVITED REVIEW: Opportunities and challenges in using exogenous enzymes to improve nonruminant animal production. Journal of Animal Science: leading source of new knowledge and perspectives in animal science, 89, 3189-3218.
  • Walk, C., Cowieson, A., Remus, J., Novak, C., McElroy, A. (2011). Effects of dietary enzymes on performance and intestinal goblet cell number of broilers exposed to a live coccidia oocyst vaccine. Poultry Science, 90(1), 91-98.
  • Wilkinson, S., Selle, P., Bedford, M., Cowieson, A. (2011). Exploiting calcium-specific appetite in poultry nutrition. Worlds Poultry Science Journal, 67, 587-598.
  • Cowieson, A., Bedford, M., Ravindran, V., Selle, P. (2011). Increased dietary sodium chloride concentrations reduce endogenous amino acid flow and influence the physiological response to the ingestion of phytic acid by broiler chickens. British Poultry Science, 52(5-6), 613-624.
  • Cowieson, A., Cowieson, N. (2011). Phytate and the Thermodynamics of Water. 22nd Annual Poultry Science Symposium, Sydney: Poultry Research Foundation, University of Sydney.
  • Cowieson, A., Wilcock, P., Bedford, M. (2011). Super-dosing effects of phytase in poultry and other monogastrics. Worlds Poultry Science Journal, 67(2), 225-235.
  • Cowieson, A., Selle, P. (2011). The Environmental Impact of low Feed Conversion Ratios in Poultry. Recent Advances in Animal Nutrition - Australia (RAAN 2011), University of New England: University of New England.

2010

  • Cowieson, A., Bedford, M., Ravindran, V. (2010). Interactions between xylanase and glucanase in maize-soy-based diets for broilers. British Poultry Science, 51(2), 246-257.
  • Cowieson, A. (2010). Stategic Selection of Exogenous Enzymes for Corn/soy-based Poultry Diets. Journal of Poultry Science, 47(1), 1-7.

2009

  • Selle, P., Cowieson, A., Ravindran, V. (2009). Consequences of calcium interactions with phytate and phytase for poultry and pigs. Livestock Science, 124(1-3), 126-141.
  • Woyengo, T., Cowieson, A., Adeola, O., Nyachoti, C. (2009). Ileal digestibility and endogenous flow of minerals and amino acids: responses to dietary phytic acid in piglets. The British Journal of Nutrition, 102(3), 428-433.
  • Shakouri, M., Iji, P., Mikkelsen, L., Cowieson, A. (2009). Intestinal function and gut microflora of broiler chickens as influenced by cereal grains and microbial enzyme supplementation. Journal of Animal Physiology and Animal Nutrition, 93(5), 647-658.
  • Cowieson, A., Bedford, M., Selle, P., Ravindran, V. (2009). Phytate and microbial phytase: implications for endogenous nitrogen losses and nutrient availability. Worlds Poultry Science Journal, 65(3), 401-418.
  • Cowieson, A., Bedford, M. (2009). The effect of phytase and carbohydrase on ileal amino acid digestibility in monogastric diets: Complimentary mode of action? Worlds Poultry Science Journal, 65(4), 609-624.

2008

  • Liu, N., Ru, Y., Li, F., Cowieson, A. (2008). Effect of diet containing phytate and phytase on the activity and messenger ribonucleic acid expression of carbohydrase and transporter in chickens. Journal of Animal Science: leading source of new knowledge and perspectives in animal science, 86(12), 3432-3439.
  • Cowieson, A., Ravindran, V. (2008). Effect of exogenous enzymes in maize-based diets varying in nutrient density for young broilers: Growth performance and digestibility of energy, minerals and amino acids. British Poultry Science, 49(1), 37-44.
  • Liu, N., Ru, Y., Cowieson, A., Li, F., Cheng, X. (2008). Effects of phytate and phytase on the performance and immune function of broilers fed nutritionally marginal diets. Poultry Science, 87(6), 1105-1111.
  • Olukosi, O., Cowieson, A., Adeola, O. (2008). Energy utilization and growth performance of broilers receiving diets supplemented with enzymes containing carbohydrase or phytase activity individually or in combination. The British Journal of Nutrition, 99(3), 682-690.
  • Ravindran, V., Cowieson, A., Selle, P. (2008). Influence of dietary electrolyte balance and microbial phytase on growth performance, nutrient utilization, and excreta quality of broiler chickens. Poultry Science, 87(4), 677-688.
  • Cowieson, A., Ravindran, V., Selle, P. (2008). Influence of dietary phytic acid and source of microbial phytase on ileal endogenous amino acid flows in broiler chickens. Poultry Science, 87(11), 2287-2299.
  • Olukosi, O., Cowieson, A., Adeola, O. (2008). Influence of enzyme supplementation of maize-soyabean meal diets on carcase composition, whole-body nutrient accretion and total tract nutrient retention of broilers. British Poultry Science, 49(4), 436-445.
  • Cowieson, A., Ravindran, V. (2008). Sensitivity of broiler starters to three doses of an enzyme cocktail in maize-based diets. British Poultry Science, 49(3), 340-346.

2007

  • Olukosi, O., Cowieson, A., Adeola, O. (2007). Age-related influence of a cocktail of xylanase, amylase, and protease or phytase individually or in combination in broilers. Poultry Science, 86(1), 77-86.
  • Cowieson, A., Ravindran, V. (2007). Effect of phytic acid and microbial phytase on the flow and amino acid composition of endogenous protein at the terminal ileum of growing broiler chickens. The British Journal of Nutrition, 98(4), 745-752.

2006

  • Cowieson, A., Hruby, M., Pierson, E. (2006). Evolving enzyme technology: Impact on commercial poultry nutrition. Nutrition Research Reviews, 19(1), 90-103.
  • Cowieson, A., Acamovic, T., Bedford, M. (2006). Phytic acid and phytase: Implications for protein utilization by poultry. Poultry Science, 85(5), 878-885.
  • Cowieson, A., Singh, D., Adeola, O. (2006). Prediction of ingredient quality and the effect of a combination of xylanase, amylase, protease and phytase in the diets of broiler chicks. 2. Energy and nutrient utilisation. British Poultry Science, 47(4), 490-500.
  • Cowieson, A., Acamovic, T., Bedford, M. (2006). Supplementation of corn-soy-based diets with an Eschericia coli-derived phytase: Effects on broiler chick performance and the digestibility of amino acids and metabolizability of minerals and energy. Poultry Science, 85(8), 1389-1397.
  • Cowieson, A., Acamovic, T., Bedford, M. (2006). Using the precision-feeding bioassay to determine the efficacy of exogenous enzymes-A new perspective. Animal Feed Science and Technology, 129(1-2), 149-158.

2005

  • Cowieson, A., Adeola, O. (2005). Carbohydrases, protease, and phytase have an additive beneficial effect in nutritionally marginal diets for broiler chicks. Poultry Science, 84(12), 1860-1867.
  • Cowieson, A. (2005). Factors that affect the nutritional value of maize for broilers. Animal Feed Science and Technology, 119(3-4), 293-305.
  • Cowieson, A., Hruby, M., Faurschou Isaksen, M. (2005). The effect of conditioning temperature and exogenous xylanase addition on the viscosity of wheat-based diets and the performance of broiler chickens. British Poultry Science, 46(6), 717-724.

2004

  • Shanmugavelu, S., Brooker, J., Acamovic, T., Cowieson, A. (2004). Effect of thyme oil and garlic powder on microbial fermentation in various sections of the gastrointestinal tract of broilers. British Poultry Science, 45(S1), S9-S10.
  • Shanmugavelu, S., Acamovic, T., Cowieson, A. (2004). Effect of thyme oil and garlic powder on the nutritive value of soybean meal. British Poultry Science, 45(SUP 1), S54-S55.
  • Cowieson, A., Acamovic, T., Bedford, M. (2004). The effects of phytase and phytic acid on the loss of endogenous amino acids and minerals from broiler chickens. British Poultry Science, 45(1), 101-108.
  • Cowieson, A., Acamovic, T., Bedford, M. (2004). The effects of supplementation of maize-based diets with exogenous phytase on amino acid digestibility and nitrogen retention by young broiler chicks. British Poultry Science, 45(Sup 1), S5-S6.

2003

  • Cowieson, A., Acamovic, T., Bedford, M. (2003). Phytic acid and the implications for protein utilisation by poultry. British Poultry Science, 44(SUP 1), S36-S37.
  • Cowieson, A., Acamovic, T., Bedford, M. (2003). Supplementation of diets containing pea meal with exogenous enzymes: Effects on weight gain, feed conversion, nutrient digestibility and gross morphology of the gastrointestinal tract of growing broiler chicks. British Poultry Science, 44(3), 427-437.
  • Cowieson, A., Acamovic, T., Bedford, M. (2003). The effect of phytase and phytic acid on endogenous losses from broiler chickens. British Poultry Science, 44(1), 23-24.

2001

  • Cowieson, A., Acamovic, T. (2001). Effect of enzyme supplementation on the nutritional value of Camelina sativa meal for broilers. British Poultry Science, 42(SUP 1), S88-S89.
  • Cowieson, A., Acamovic, T. (2001). Metabolisable energy and digestibility coefficients of DM and N, of pea (Pisum sativum) and lupin (Lupinus albus) meals for broilers. British Poultry Science, 42(Sup 1), S86-S87.
Back to Top

For support on your academic profile contact Research Support.