Items where Author is "Holroyd, R.G."

Article

Johnston, D.J., Corbet, N.J., Barwick, S.A., Wolcott, M.L. and Holroyd, R.G. (2014) Genetic correlations of young bull reproductive traits and heifer puberty traits with female reproductive performance in two tropical beef genotypes in northern Australia. Animal Production Science, 54 (1). pp. 74-84. ISSN 1836-0939; 1836-5787

Johnston, D. J., Barwick, S. A., Fordyce, G., Holroyd, R.G., Williams, P.J., Corbet, N.J. and Grant, T. P. (2014) Genetics of early and lifetime annual reproductive performance in cows of two tropical beef genotypes in northern Australia. Animal Production Science, 54 (1). pp. 1-15. ISSN 1836-0939; 1836-5787

Barwick, S.A., Johnston, D.J., Holroyd, R.G., Walkley, J.R.W. and Burrow, H.M. (2014) Multi-trait assessment of early-in-life female, male and genomic measures for use in genetic selection to improve female reproductive performance of Brahman cattle. Animal Production Science, 54 (1). pp. 97-109. ISSN 1836-0939; 1836-5787

Burns, B. M., Corbet, N.J., Corbet, D. H., Crisp, J.M., Venus, B., Johnston, D.J., Li, Y., McGowan, M. R. and Holroyd, R.G. (2013) Male traits and herd reproductive capability in tropical beef cattle. 1. Experimental design and animal measures. Animal Production Science, 53 (2). pp. 87-100. ISSN 1836-0939

Corbet, N.J., Burns, B. M., Johnston, D.J., Wolcott, M.L., Corbet, D. H., Venus, B., Li, Y., McGowan, M. R. and Holroyd, R.G. (2013) Male traits and herd reproductive capability in tropical beef cattle. 2. Genetic parameters of bull traits. Animal Production Science, 53 (2). pp. 101-113. ISSN 1836-0939

Burns, B.M., Fordyce, G. and Holroyd, R.G. (2010) A review of factors that impact on the capacity of beef cattle females to conceive, maintain a pregnancy and wean a calf - implications for reproductive efficiency in northern Australia. Animal Reproduction Science, 122 (1/2). pp. 1-22.

Barwick, S.A., Johnston, D.J., Burrow, H.M., Holroyd, R.G., Fordyce, G., Wolcott, M.L., Sim, D. and Sullivan, M. T. (2009) Genetics of heifer performance in 'wet' and 'dry' seasons and their relationships with steer performance in two tropical beef genotypes. Animal Production Science, 49 (6). pp. 367-382.

Hill, B.D., Holroyd, R.G. and Sullivan, M. T. (2009) Clinical and pathological findings associated with congenital hypovitaminosis A in extensively grazed beef cattle. Australian Veterinary Journal, 87 (3). pp. 94-98.

Barwick, S.A., Johnston, D.J., Burrow, H.M., Holroyd, R.G., Fordyce, G., Wolcott, M.L., Sim, D. and Sullivan, M. T. (2009) Erratum: Genetics of heifer performance in 'wet' and 'dry' seasons and their relationships with steer performance in two tropical beef genotypes.(Animal Production Science (2009) 49:5-6 (367-382)). Animal Production Science, 49 (8). p. 727.

Petherick, J.C., Doogan, V.J., Holroyd, R.G., Olsson, P. and Venus, B.K. (2009) Quality of handling and holding yard environment, and beef cattle temperament: 1. Relationships with flight speed and fear of humans. Applied Animal Behabiour Science, 120 (1-2). pp. 18-27.

Petherick, J.C., Holroyd, R.G. and Swain, A.J. (2003) Performance of lot-fed Bos indicus steers exposed to aspects of a feedlot environment before lot-feeding. Australian Journal of Experimental Agriculture, 43 (10). pp. 1181-1191.

Holroyd, R.G., Doogan, V.J., De Faveri, J., Fordyce, G., McGowan, M.R., Bertram, J.D., Vankan, D.M., Fitzpatrick, L.A., Jayawardhana, G.A. and Miller, R.G. (2002) Bull selection and use in northern Australia. 4. Calf output and predictors of fertility of bulls in multiple-sire herds. Animal Reproduction Science, 71 (1-2). pp. 67-79.

Bertram, J.D., Fordyce, G., McGowan, M.R., Jayawardhana, G.A., Fitzpatrick, L.A., Doogan, V.J., De Faveri, J. and Holroyd, R.G. (2002) Bull selection and use in northern Australia: 3. Serving capacity tests. Animal Reproduction Science, 71 (1-2). pp. 51-66.

Fordyce, G., Fitzpatrick, L.A., Cooper, N.J., Doogan, V.J., De Faveri, J. and Holroyd, R.G. (2002) Bull selection and use in northern Australia: 5. Social behaviour and management. Animal Reproduction Science, 71 (1-2). pp. 81-99.

Fitzpatrick, L.A., Fordyce, G., McGowan, M.R., Bertram, J.D., Doogan, V.J., De Faveri, J., Miller, R.G. and Holroyd, R.G. (2002) Bull selection and use in northern Australia: Part 2. Semen traits. Animal Reproduction Science, 71 (1-2). pp. 39-49.

McGowan, M.R., Bertram, J.D., Fordyce, G., Fitzpatrick, L.A., Miller, R.G., Jayawardhana, G.A., Doogan, V.J., De Faveri, J. and Holroyd, R.G. (2002) Bull selection and use in northern Australia. 1. Physical traits. Animal Reproduction Science, 71 (1). pp. 25-37.

Petherick, J.C., Holroyd, R.G., Doogan, V.J. and Venus, B.K. (2002) Productivity, carcass and meat quality of lot-fed Bos indicus cross steers grouped according to temperament. Australian Journal of Experimental Agriculture, 42 (4). pp. 389-398.

Holroyd, R.G., Petherick, J.C., Swain, A.J. and Jeffery, M.R. (1998) Relationships between behavioural traits and liveweight performance of Brahman steers in a feedlot. Animal Production in Australia. Proceedings of the Australian Society of Animal Production, 22 . p. 317. ISSN 0728-5965

Klieve, A.V., Holroyd, R.G., Turner, A.F. and Lindsay, J.A. (1998) Rumen bacterial and protozoal populations in cattle being relocated in tropical Queensland. Australian Journal of Agricultural Research, 49 (7). pp. 1153-1159.

Fordyce, G., Howitt, C.J., Holroyd, R.G., O'Rourke, P.K. and Entwistle, K.W. (1996) The performance of Brahman-Shorthorn and Sahiwal-Shorthorn beef cattle in the dry tropics of northern Queensland. 5. Scrotal circumference, temperament, ectoparasite resistance, and the genetics of growth and other traits in bulls. Australian Journal of Experimental Agriculture, 36 (1). pp. 9-17.

O'Rourke, P.K., Fordyce, G., Holroyd, R.G. and Loxton, I.D. (1995) Mortality, wastage, and lifetime productivity of Bos indicus cows under extensive grazing in northern Australia. 1. Seasonal mating in the speargrass region. Australian Journal of Experimental Agriculture, 35 (3). pp. 285-295. ISSN 0816-1089

O'Rourke, P.K., Fordyce, G., Holroyd, R.G. and Sullivan, R.M. (1995) Mortality, wastage, and lifetime productivity of Bos indicus cows under extensive grazing in northern Australia. 3. Comparison of culling strategies. Australian Journal of Experimental Agriculture, 35 (3). pp. 307-316. ISSN 0816-1089

Mayer, R. J., Fordyce, G., Loxton, I.D. and Holroyd, R.G. (1993) The performance of Brahman-Shorthorn and Sahiwal-Shorthorn cattle in the dry tropics of northern Queensland. 4. Postweaning growth and carcass traits. Australian Journal of Experimental Agriculture, 33 (5). pp. 531-539.

Holroyd, R.G., Entwistle, K.W. and Shepherd, R.K. (1993) Effects on reproduction of estrous cycle variations, rectal temperatures and liveweights in mated Brahman cross heifers. Theriogenology, 40 (3). pp. 453-464.

Fordyce, G., James, T.A., Holroyd, R.G., Beaman, N.J., Mayer, R. J. and O'Rourke, P.K. (1993) The performance of Brahman-Shorthorn and Sahiwal-Shorthorn beef cattle in the dry tropics of northern Queensland. 3. Birth weights and growth to weaning. Australian Journal of Experimental Agriculture, 33 (2). pp. 119-127.

Holroyd, R.G., James, T.A., Doogan, V.J., Fordyce, G. and O'Rourke, P.K. (1990) The performance of Brahman-Shorthorn and Sahiwal-Shorthorn beef cattle in the dry tropics of northern Queensland. 1. Reproductive rates and liveweights of F1 and backcross females. Australian Journal of Experimental Agriculture, 30 (6). pp. 717-725.

Holroyd, R.G., James, T.A., Doogan, V.J., Fordyce, G., Tyler, R. and O'Rourke, P.K. (1990) The performance of Brahman-Shorthorn and Sahiwal-Shorthorn beef cattle in the dry tropics of northern Queensland. 2. Reproductive rates and liveweights of F2et seq. females. Australian Journal of Experimental Agriculture, 30 (6). 727 -733.

Conference or Workshop Item

Doogan, V.J., Swain, A.J., Petherick, J.C. and Holroyd, R.G. (2000) A Comparison of Methods for Describing Irregular Animal Growth and Testing for Treatment Effects. In: Animal Production for a Consuming World. AAAP-ASAP Conference, 2nd - 7th July, Sydney, Australia.

Petherick, J.C., Venus, B.K., Doogan, V.J. and Holroyd, R.G. (2000) Effect of Grouping Feedlot Steers by Temperament on Performance and Carcass Traits. In: Animal Production for a Consuming World. AAAP-ASAP Conference, 2nd - 7th July, Sydney, Australia.

Holroyd, R.G., Petherick, J.C., Venus, B.K. and Doogan, V.J. (2000) Effects of Grouping Feedlot Steers with a Range of Flight Speeds on Liveweight and Temperament Changes. In: Animal Production for a Consuming World. AAAP-ASAP Conference, 2nd - 7th July, Sydney, Australia.

Venus, B.K., Petherick, J.C., Doogan, V.J. and Holroyd, R.G. (2000) Plasma Biochemical and Haematological Changes in Steers of Different Temperament during Feedlotting. In: Animal Production for a Consuming World. AAAP-ASAP Conference, 2nd - 7th July, Sydney, Australia.

Petherick, J.C., Swain, A.J. and Holroyd, R.G. (2000) Relationships between Patterns of Behaviour and Liveweight Gains of Feedlot Steers. In: Animal Production for a Consuming World. AAAP-ASAP Conference, 2nd - 7th July, Sydney, Australia.

Petherick, J.C., Holroyd, R.G., Doogan, V.J. and Cooper, N.J. (1998) Observations on the influence of repeated sampling procedures on temperament changes of weaner cattle. In: Animal Production in Australia: The Australian Society of Animal Production. Twenty-second Biennial Conference.

Holroyd, R.G., Petherick, J.C., Swain, A.J. and Jeffery, M.R. (1998) Relationships between behavioural traits and liveweight performance of Brahman steers in a feedlot. In: Animal Production in Australia: The Australian Society of Animal Production. Twenty-second Biennial Conference.

Petherick, J.C., Holroyd, R.G., Casey, V.J. and Cooper, N.J. (1998) Timing of weaning and processing: effects on liveweight changes of weaner cattle. In: Animal Production in Australia: The Australian Society of Animal Production. Twenty-second Biennial Conference.

Bertram, J.D., Holroyd, R.G., McGowan, M. R. and Doogan, V.J. (1997) Sheath and mating ability measurements and their interrelationships in Santa Gertrudis bulls. In: Association for the Advancement of Animal Breeding and Genetics, 1997, Dubbo, Australia.

Hasker, P.J.S., Holroyd, R.G. and Doogan, V.J. (1996) Comparison of growth rates of relocated and local steers. In: Animal Production in Australia: The Australian Society of Animal Production. Twenty First Biennial Conference., 8 - 12 July, University of Queensland. Brisbane.

Holroyd, R.G., Petherick, J.C. and Doogan, V.J. (1996) Effects of providing prior experience of a feedlot environment on the performance of feedlot cattle. In: Animal Production in Australia: The Australian Society of Animal Production. Twenty First Biennial Conference, 8 - 12 July, University of Queensland. Brisbane.

Hasker, P.J.S., Holroyd, R.G., Doogan, V.J. and Rowan, K.J. (1996) Variation in liveweight gain of feedlot steers in southern Queensland. In: Animal Production in Australia: The Australian Society of Animal Production, 8 - 12 July, Twenty First Biennial Conference. University of Queensland.

Loxton, I.D., Holroyd, R.G., Bligh, G.W., James, T.A., Mullins, T.J. and Jeffery, M.R. (1992) Protein supplementation and growth enhancer strategies in successive years to maximise growth of Brahman cross steers grazing sown grass pastures on brigalow lands. In: Animal Production in Australia: The Australian Society of Animal Production. Nineteenth Biennial Conference., 5 - 9 July, LaTrobe University, Melbourne, Victoria.

Fordyce, G., Holroyd, R.G., James, T.A. and Reid, D. J. (1988) The effect of post-weaning growth on the fertility of Brahman cross heifers. In: Animal Production in Australia: The Australian Society of Animal Production. 17th Biennial Conference, May 1988, Sydney, New South Wales.

Taylor, W.J., Holroyd, R.G. and Rebgetz, J.G. (1982) Influence of nitrogen based supplements on live weight, fertility and mortality of heifers grazing dry season native pasture. In: Animal Production in Australia: The Australian Society of Animal Production. Fourteenth Biennial Conference.

Holroyd, R.G. and O'Rourke, P.K. (1980) Reproductive performance of F1 brahman-shorthorn and F1 Sahiwal-shorthorn cattle in northern Australia. In: Animal Production in Australia: The Australian Society of Animal Production. Thirteenth Biennial Conference., August, Perth, Western Australia,.

Entwistle, K.W., Winantea, A. and Holroyd, R.G. (1980) Sperm production rates in Bos indicus strain bulls. In: Animal Production in Australia: The Australian Society of Animal Production, August, Thirteenth Biennial Conference. Perth, Western Australia.

Holroyd, R.G. and Dunster, P.J. (1978) The effect of the cattle tick on growth rates and reproductive rates of Bos indicus cross heifers in north Queensland. In: Animal Production in Australia: The Australian Society of Animal Production, February, Twelfth Biennial Conference. Melbourne, Victoria.