Pr Kenyon

Summary

Affiliation: Massey University
Country: New Zealand

Publications

  1. ncbi request reprint The effect of individual liveweight and condition scores of ewes at mating on reproductive and scanning performance
    P R Kenyon
    Institute of Veterinary Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 52:230-5. 2004
  2. ncbi request reprint Shearing during pregnancy--review of a policy to increase birthweight and survival of lambs in New Zealand pastoral farming systems
    P R Kenyon
    Institute of Veterinary Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 51:200-7. 2003
  3. ncbi request reprint Effect of liveweight and condition score of ewes at mating, and shearing mid-pregnancy, on birthweights and growth rates of twin lambs to weaning
    P R Kenyon
    Institute of Veterinary Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 52:145-9. 2004
  4. ncbi request reprint Effect of the age of rams on reproductive performance of ewe hoggets
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 55:184-7. 2007
  5. ncbi request reprint Effect of the ratio of teaser rams used prior to breeding on the reproductive performance of ewe hoggets
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 55:342-5. 2007
  6. doi request reprint The effect of the maturity and prior breeding activity of rams and body condition score of ewe hoggets on the reproductive performance of ewe hoggets
    P R Kenyon
    Sheep Research Group, Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
    N Z Vet J 57:290-4. 2009
  7. ncbi request reprint The effect of length of use of teaser rams prior to mating and individual liveweight on the reproductive performance of ewe hoggets
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 54:91-5. 2006
  8. ncbi request reprint The effect of individual liveweight and use of teaser rams prior to mating on the reproductive performance of ewe hoggets
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 53:340-3. 2005
  9. ncbi request reprint Does sward height grazed by ewes in mid- to late-pregnancy affect indices of colostrum intake by twin and triplet lambs?
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 53:336-9. 2005
  10. ncbi request reprint The effect of progesterone supplementation post mating and shearing of ewes in early pregnancy on the reproductive performance of ewes and birthweight of lambs
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 53:321-5. 2005

Detail Information

Publications26

  1. ncbi request reprint The effect of individual liveweight and condition scores of ewes at mating on reproductive and scanning performance
    P R Kenyon
    Institute of Veterinary Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 52:230-5. 2004
    ..To determine the effects of liveweight (LW) and condition score (CS) of ewes at mating on both mating performance and scanning percentage, and to determine if effects of CS were independent of LW...
  2. ncbi request reprint Shearing during pregnancy--review of a policy to increase birthweight and survival of lambs in New Zealand pastoral farming systems
    P R Kenyon
    Institute of Veterinary Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 51:200-7. 2003
    ..0 kg), and the increase in birthweight observed must move a significant proportion of otherwise lightweight lambs into a higher range of survival rate...
  3. ncbi request reprint Effect of liveweight and condition score of ewes at mating, and shearing mid-pregnancy, on birthweights and growth rates of twin lambs to weaning
    P R Kenyon
    Institute of Veterinary Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 52:145-9. 2004
    ....
  4. ncbi request reprint Effect of the age of rams on reproductive performance of ewe hoggets
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 55:184-7. 2007
    ..To determine the effect of the age of rams, used at a standardised ram-to-ewe ratio, on the breeding performance and pregnancy rate of ewe hoggets...
  5. ncbi request reprint Effect of the ratio of teaser rams used prior to breeding on the reproductive performance of ewe hoggets
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 55:342-5. 2007
    ..To determine the effects of the ratio of vasectomised (teaser) rams to ewe hoggets used prior to breeding on the breeding performance and pregnancy rate of ewe hoggets...
  6. doi request reprint The effect of the maturity and prior breeding activity of rams and body condition score of ewe hoggets on the reproductive performance of ewe hoggets
    P R Kenyon
    Sheep Research Group, Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
    N Z Vet J 57:290-4. 2009
    ..To determine the effect of age and prior use of mature rams at a given ram-to-ewe ratio, and the effect of body condition on breeding performance and pregnancy rate of ewe hoggets...
  7. ncbi request reprint The effect of length of use of teaser rams prior to mating and individual liveweight on the reproductive performance of ewe hoggets
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 54:91-5. 2006
    ..To determine the effects of liveweight (LW) and duration of teasing with vasectomised rams prior to breeding on both the mating performance and pregnancy rate of ewe hoggets...
  8. ncbi request reprint The effect of individual liveweight and use of teaser rams prior to mating on the reproductive performance of ewe hoggets
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 53:340-3. 2005
    ..To determine the effects of liveweight (LW) and use of teaser rams prior to mating on both the mating performance and pregnancy rate of ewe hoggets...
  9. ncbi request reprint Does sward height grazed by ewes in mid- to late-pregnancy affect indices of colostrum intake by twin and triplet lambs?
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 53:336-9. 2005
    ..To determine if sward height grazed by ewes in mid- to late-pregnancy affects subsequent indices of colostrum intake by twin and triplet lambs, and the extent of the variation in colostrums intake between twin and triplet litter-mates...
  10. ncbi request reprint The effect of progesterone supplementation post mating and shearing of ewes in early pregnancy on the reproductive performance of ewes and birthweight of lambs
    P R Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 53:321-5. 2005
    ..To determine whether short-term progesterone supplementation post mating or shearing of ewes in early pregnancy affected either the proportion of ewes that lambed or that had multiple lambs, or the birthweight of lambs...
  11. doi request reprint Can Romney lambs whose scrotums have been shortened by the use of a rubber ring be used as an alternative to vasectomised Perendale rams for inducing early breeding activity in Romney ewe lambs?
    Pr Kenyon
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 56:326-9. 2008
    ..To determine if exposure to ram lambs whose scrotums had been shortened by the use of a rubber ring would induce reproductive activity in ewe lambs, and determine if this technique was an effective alternative to vasectomised mature rams...
  12. ncbi request reprint Melatonin-improved reproductive performance in sheep bred out of season
    G deNicolo
    College of Sciences, Massey University, Palmerston North, New Zealand
    Anim Reprod Sci 109:124-33. 2008
    ....
  13. doi request reprint Dose-titration challenge of young pregnant sheep with Neospora caninum tachyzoites
    J F Weston
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand
    Vet Parasitol 164:183-91. 2009
    ..IFAT results did not correlate well with the level of challenge or the outcome of pregnancy and their relevance in studies of this kind should be questioned...
  14. doi request reprint Maternal plasma oestrone sulphate concentration prior to parturition in relation to birth weight of the calf in primiparous, 2-year-old, Angus heifers
    R E Hickson
    Institute of Veterinary, Animal and Biomedical Sciences, College of Sciences, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
    Anim Reprod Sci 114:301-5. 2009
    ..Maternal plasma oestrone sulphate concentration did not affect the probability of assistance at calving or stillbirth...
  15. doi request reprint A survey of beef cattle farmers in New Zealand, examining management practices of primiparous breeding heifers
    R E Hickson
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
    N Z Vet J 56:176-83. 2008
    ....
  16. doi request reprint The bone-muscle ratio of fetal lambs is affected more by maternal nutrition during pregnancy than by maternal size
    E C Firth
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Tennant Drive, Palmerston North, New Zealand 4442
    Am J Physiol Regul Integr Comp Physiol 294:R1890-4. 2008
    ..Dietary intake during pregnancy was more important than maternal size in affecting the ratio. We conclude that intrauterine environmental factors may be important in determining bone mass postnatally, and possibly later in life...
  17. doi request reprint Effects of ewe size and nutrition on fetal mammary gland development and lactational performance of offspring at their first lactation
    D S van der Linden
    Sheep Research Group, Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand
    J Anim Sci 87:3944-54. 2009
    ..These findings are important for furthering our understanding of how the environment to which the female fetus is exposed can affect her subsequent development and her ability to nourish the next generation...
  18. doi request reprint Dam and granddam feeding during pregnancy in sheep affects milk supply in offspring and reproductive performance in grand-offspring
    H T Blair
    Sheep Research Group, Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand
    J Anim Sci 88:E40-50. 2010
    ..Molecular and physiological mechanisms for these changes are being sought...
  19. ncbi request reprint Induced seasonal reproductive performance in two breeds of sheep
    G de Nicolo
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    Anim Reprod Sci 103:278-89. 2008
    ..It was concluded that seasonal differences in the ability of ewes to conceive are not the consequence of failure to display oestrus or to ovulate, but probably are a result of failure of fertilisation or the establishment of pregnancy...
  20. ncbi request reprint Dystocia in beef heifers: a review of genetic and nutritional influences
    R E Hickson
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 54:256-64. 2006
    ..More research is needed into the effects of nutrition in early gestation on fetal and placental development in cattle...
  21. ncbi request reprint The stress caused by laparoscopy in sheep and its alleviation
    K J Stafford
    Institute of Veterinary Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 54:109-13. 2006
    ..To determine the plasma cortisol response to laparoscopy in ewes and investigate means of reducing it...
  22. ncbi request reprint The effect of individual liveweight and condition of beef cows on their reproductive performance and birth and weaning weights of calves
    S T Morris
    Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
    N Z Vet J 54:96-100. 2006
    ..To examine of the influence of liveweight (LW), condition (CS) and age of dam on inter-calving interval (ICI), date of calving, days from joining to calving, and birth and weaning weights of calves...
  23. doi request reprint Plasma progesterone concentrations during early pregnancy in spring- and autumn-bred ewes
    G deNicolo
    Massey University, Palmerston North, New Zealand
    Anim Reprod Sci 111:279-88. 2009
    ..This may be indicative to the failure of maternal recognition of pregnancy, and it is recommended that events surrounding this stage of pregnancy (Days 12-14) be examined more closely in ewes during the non-breeding season...
  24. ncbi request reprint Changes in metabolite, energy metabolism related enzyme activities and peripheral blood mononuclear cell (PBMC) populations in beef heifers with two differing liveweight change profiles in New Zealand
    A Mori
    Department of Veterinary Science, School of Veterinary Medicine, Nippon Veterinary and Life Science University, 1 7 1 Kyonancho, Musashino, Tokyo 180 8602, Japan
    Vet Res Commun 32:159-66. 2008
    ..Plasma IRI and FFA concentrations, leukocyte cytosolic and mitochondrial MDH activities and CD3 positive and NK cell populations may be useful markers to evaluate metabolic conditions and immunity in the restricted feeding beef heifers...
  25. ncbi request reprint Plasma metabolite concentrations and hepatic enzyme activities in pregnant Romney ewes with restricted feeding
    Y Tanaka
    Department of Veterinary Science, School of Veterinary Medicine, Nippon Veterinary and Life Science University, 1 7 1 Kyonancho, Musashino, Tokyo 180 8602, Japan
    Res Vet Sci 85:17-21. 2008
    ..Restricted feeding could maintain pregnancy and some plasma metabolites and peripheral leukocyte enzymes may be useful indicators for evaluating metabolic changes in ewes...
  26. ncbi request reprint Comparison of plasma metabolite concentrations and enzyme activities in beef cattle raised by different feeding systems in Korea, Japan and New Zealand
    A Mori
    Department of Veterinary Science, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Musashiro, Tokyo 180 8602, Japan
    J Vet Med A Physiol Pathol Clin Med 54:342-5. 2007
    ..Plasma metabolite concentrations and energy metabolism-related enzyme activities may be good indicators for evaluating metabolic conditions of beef cattle raised by different feeding systems...