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2014
Induction of delayed-type hypersensitivity reactions to Candida albicans in pasture-based dairy cows, JE, McGowan, BC Hine, BA Mallard, and GA Verkerk , Proceedings of the New Zealand Society of Animal Production, 06/2014, Volume 74, Napier, p.233-238, (2014)
2009
Identification of potential impacts of New Zealand dairy housing systems on dairy cow welfare : Brief Communication, NA, Arnold, GA Verkerk, R Gregory, and LR Matthews , Proceedings of the New Zealand Society of Animal Production, Jun, Volume 69, Christchurch, p.54-56, (2009)
2005
Animal welfare in large dairy herds: a survey of current practices, CB, Tucker, GA Verkerk, BH Small, IS Tarbotton, and JR Webster , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 65, Christchurch, p.127-131, (2005)
2004
Use of breeding values for live weight to calculate individual live weight targets for dairy heifers, JR, Bryant, CW Holmes, N Lopez-Villalobos, LR McNaughton, IM Brookes, GA Verkerk, and JE Pryce , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 64, Hamilton, p.118-121, (2004)
2003
Metabolic responses to glucose challenge in New Zealand and overseas Holstein-Friesian dairy cows, LM, Chagas, BA Clark, FM Rhodes, D Blache, ES Kolver, and GA Verkerk , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 63, Queenstown, p.31-34, (2003)
Postpartum anoestrous intervals and reproductive performance of three genotypes of Holstein-Friesian dairy cattle managed in a seasonal pasture-based dairy system., LR, McNaughton, GA Verkerk, TJ Parkinson, KA MacDonald, and CW Holmes , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 63, Queenstown, p.77-81, (2003)
2002
Factors influencing inducing decision-making in dairy cows: a case study of scientists' and producers' views, CAJ, Botha, and GA Verkerk , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.257-260, (2002)
Monitoring onset of puberty in three genetic strains of Holstein-Friesian dairy cattle, LR, McNaughton, SR Morgan, P Gore, GA Verkerk, CW Holmes, and TJ Parkinson , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.30-33, (2002)
Winter dairy grazing systems: management practices and cow comfort, M, Stewart, AD Fisher, GA Verkerk, and LR Matthews , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.44-48, (2002)
2001
CowTrakker technology for improved heat detection, GA, Verkerk, RW Claycomb, VK Taufa, P Copeman, A Napper, and E Kolver , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.172-175, (2001)
Magnesium supplementation of lactating dairy cows in the summer and autumn, KA, MacDonald, JW Penno, GA Verkerk, J Jago, and BW Dow , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.148-151, (2001)
Monitoring adrenal activity in dairy cows under various feeding regimens using faecal glucocorticoid metabolites, CJ, Morrow, ES Kolver, KA MacDonald, GA Verkerk, and LR Matthews , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.52-55, (2001)
Postpartum anoestrous interval and metabolic changes in heifers supplemented with pasture prepartum, LM, Chagas, SR Morgan, PJS Gore, BA Clark, and GA Verkerk , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.188-191, (2001)
Relationships between, milk production, nutrition and reproduction in benchmark herds, JF, Smith, GA Verkerk, BA Clark, BJ McKay, and DM Duganzich , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.195-198, (2001)
2000
Comparison of selected reproductive characteristics in Overseas and New Zealand Holstein-Friesian cows grazing pasture or fed a total mixed ration, GA, Verkerk, S Morgan, and ES Kolver , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 60, Hamilton, p.270-274, (2000)
Patterns of luteinising hormone release and embryo recovery following superovulation of cycling and anoestrous lactating dairy cows and in non-lactating cows, GA, Verkerk, VK Taufa, and R Hooper , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 60, Hamilton, p.295-296, (2000)
Prediction of post-partum anovulatory interval in dairy cows, BA, Clark, LM Chagas, PM Gore, B Dow, and GA Verkerk , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 60, Hamilton, p.15-18, (2000)
Urinary cortisol: An indicator of stress in dairy cattle, CJ, Morrow, ES Kolver, GA Verkerk, and LR Matthews , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 60, Hamilton, p.218-221, (2000)
1999
Angus selection-herd reproductive data: A genetic model for dairy cattle?, CA, Morris, GA Verkerk, and JA Wilson , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 59, p.169-172, (1999)
Can Beta-hydroxybutyrate levels predict postpartum anoestrous interval of dairy cows?, GA, Verkerk, and JC Guiney , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 59, p.205-207, (1999)
The effects of stressors on lymphocyte populations and function in lactating dairy cows., AD, Fisher, GA Verkerk, RA Stevenson, E Wesselink, CJ Morrow, and LR Matthews , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 59, p.195-197, (1999)
The effects of stressors on milk composition in dairy cows., GA, Verkerk, AD Fisher, CJ Morrow, and LR Matthews , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 59, p.192-194, (1999)
Validation of body condition scoring by using ultrasound measurements of subcutaneous fat., KA, MacDonald, GA Verkerk, and JW Penno , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 59, p.177-179, (1999)
1998
Effects of oestradiol benzoate by injection at CIDR insertion for the treatment of postpartum anovulatory anoestrus in dairy cows, GA, Verkerk, VK Taufa, S Morgan, BA Clark, and KL Macmillan , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 58, p.82-84, (1998)
Milk progesterone concentrations at selected times following oestrus and insemination in relation to the success of pregnancy, GA, Verkerk, and KL Macmillan , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 58, p.95-97, (1998)
1997
Induction of Parturition in Dairy Cows - A Survey from spring 1996 in the Waikato region., GA, Verkerk, G Goble, S McDougall, M Woods, B Clark, and KL Macmillan , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 57, p.231-233, (1997)
1996
An attempt to create an 'anoestrous cow' model by restricting feed allowances in non-lactating cyclic cows, CR, Burke, GA Verkerk, and KL Macmillan , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 56, p.233-235, (1996)
Hormonal induction of oestrus during the early postpartum period and the subsequent effects of nutrition on ovarian activity in dairy heifers, CR, Burke, KL Macmillan, and GA Verkerk , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 56, p.230-232, (1996)
Milk cortisol concentrations as an indicator of stress in lactating dairy cows, GA, Verkerk, AM Phipps, and LR Matthews , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 56, p.77-79, (1996)
1995
Effects of induced parturition on mammary function, TB, McFadden, GA Verkerk, BA Clark, RC Hovey, and KL Macmillan , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 55, p.21-22, (1995)
Tail docked dairy cattle: fly induced behaviour and adrenal responsiveness to ACTH, AM, Phipps, LR Matthews, and GA Verkerk , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 55, p.61-63, (1995)
1993
Is the welfare of dairy cows at risk from current farm practices?, AL, Hargreaves, LR Matthews, and GA Verkerk , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 53, p.179-182, (1993)