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Animal Science and Veterinary
New Zealand
2026

D-Index & Metrics

Animal Science and Veterinary

D-Index
59
Citations
12990
World Ranking
342
National Ranking
5

Research.com Recognitions

  • 2026 - Research.com Animal Science and Veterinary in New Zealand Leader Award
  • 2025 - Research.com Animal Science and Veterinary in New Zealand Leader Award
  • 2023 - Research.com Animal Science and Veterinary in New Zealand Leader Award
  • 2022 - Research.com Animal Science and Veterinary in New Zealand Leader Award

Overview

John R. Roche is affiliated with the University of Auckland in New Zealand. Their research primarily focuses on Agricultural and Biological Sciences, with a significant emphasis on subfields such as Agronomy and Crop Science, Genetics, Small Animals, Animal Science and Zoology, and Ecology.

The key topics covered in their work include:

  • Reproductive Physiology in Livestock
  • Ruminant Nutrition and Digestive Physiology
  • Genetic and phenotypic traits in livestock
  • Effects of Environmental Stressors on Livestock
  • Agriculture Sustainability and Environmental Impact
  • Animal health and immunology
  • Reproductive System and Pregnancy

They have published extensively, with a notable presence in several journals. Frequent publication venues for their work are:

  • Journal of Dairy Science
  • New Zealand Journal of Agricultural Research
  • Sustainability
  • JDS Communications
  • SDSSU MULTIDISCIPLINARY RESEARCH JOURNAL

Prominent recent papers authored or co-authored by John R. Roche include:

  • Heifers with positive genetic merit for fertility traits reach puberty earlier and have a greater pregnancy rate than heifers with negative genetic merit for fertility traits, 2021, Journal of Dairy Science
  • Graduate Student Literature Review: Evaluating the appropriate use of wearable accelerometers in research to monitor lying behaviors of dairy cows, 2020, Journal of Dairy Science
  • Temporal profiles describing markers of inflammation and metabolism during the transition period of pasture-based, seasonal-calving dairy cows, 2022, Journal of Dairy Science
  • Associations between lying behavior and activity and hypocalcemia in grazing dairy cows during the transition period, 2020, Journal of Dairy Science
  • Lifetime Climate Impacts of Diet Transitions: A Novel Climate Change Accounting Perspective, 2021, Sustainability

Their collaborative network includes frequent co-authors such as:

  • B. Kuhn-Sherlock
  • C.V.C. Phyn
  • C.R. Burke
  • S.J. Hendriks
  • M.A. Crookenden

Best Publications

  • Invited review: Body condition score and its association with dairy cow productivity, health, and welfare

    John R. Roche;Nicolas Charles Friggens;Jane K. Kay;Mark W. Fisher

  • Invited review : New Perspectives on the Roles of Nutrition and Metabolic Priorities in the Subfertility of High-Producing Dairy Cows

    L.M. Chagas;J.J. Bass;Dominique Blache;C.R. Burke

  • Relationships among international body condition scoring systems.

    J.R. Roche;P.G. Dillon;C.R. Stockdale;L.H. Baumgard

  • Associations among body condition score, body weight, and reproductive performance in seasonal-calving dairy cattle.

    J.R. Roche;K.A. Macdonald;C.R. Burke;J.M. Lee

  • Effect of Stocking Rate on Pasture Production, Milk Production, and Reproduction of Dairy Cows in Pasture-Based Systems

    K.A. Macdonald;J.W. Penno;J.A.S. Lancaster;J.R. Roche

  • Optimising financial return from grazing in temperate pastures.

    P. Dillon;J. R. Roche;L. Shalloo;B. Horan

  • Holstein-Friesian strain and feed effects on milk production, body weight, and body condition score profiles in grazing dairy cows.

    J.R. Roche;D.P. Berry;E.S. Kolver

  • Body Condition Score and Body Weight Effects on Dystocia and Stillbirths and Consequent Effects on Postcalving Performance

    D.P. Berry;J.M. Lee;K.A. Macdonald;J.R. Roche

  • Relationships Among Body Condition Score, Body Weight, and Milk Production Variables in Pasture-Based Dairy Cows

    J.R. Roche;J.M. Lee;K.A. Macdonald;D.P. Berry

  • Somatotropic axis components and nutrient partitioning in genetically diverse dairy cows managed under different feed allowances in a pasture system.

    M.C. Lucy;G.A. Verkerk;B.E. Whyte;K.A. Macdonald

  • Periparturient climatic, animal, and management factors influencing the incidence of milk Fever in grazing systems.

    J.R. Roche;D.P. Berry

  • Nutritional management of the transition cow in the 21st century – a paradigm shift in thinking

    J. R. Roche;A. W. Bell;T. R. Overton;Juan J Loor

  • Associations Among Body Condition Score, Body Weight, Somatic Cell Count, and Clinical Mastitis in Seasonally Calving Dairy Cattle

    D.P. Berry;J.M. Lee;K.A. Macdonald;K. Stafford

  • Validation of reference genes for quantitative RT-PCR studies of gene expression in perennial ryegrass (Lolium perenne L.).

    Julia M Lee;John R Roche;Danny J Donaghy;Anthony Thrush

  • Modulation of the maternal immune system by the pre-implantation embryo

    Caroline G Walker;Susanne Meier;Mathew D Littlejohn;Klaus Lehnert

  • Effect of Feeding Level Pre- and Post-Puberty and Body Weight at First Calving on Growth, Milk Production, and Fertility in Grazing Dairy Cows

    K.A. Macdonald;J.W. Penno;A.M. Bryant;J.R. Roche

  • A comparison between feeding systems (pasture and TMR) and the effect of vitamin E supplementation on plasma and milk fatty acid profiles in dairy cows.

    Jane K Kay;John R Roche;Eric S Kolver;Norman A Thomson

  • Relationships between endometritis and metabolic state during the transition period in pasture-grazed dairy cows.

    C. R. Burke;S. Meier;S. McDougall;C. Compton

  • Neuroendocrine and physiological regulation of intake with particular reference to domesticated ruminant animals.

    John R. Roche;Dominique Blache;Jane K. Kay;Dale R. Miller

  • Milk Production and Fertility in Cattle.

    D. P. Berry;Nicolas C. Friggens;Nicolas C. Friggens;M. Lucy;J. R. Roche

  • Relationships between cytology, bacteriology and vaginal discharge scores and reproductive performance in dairy cattle

    Scott McDougall;Hassan Hussein;Danielle Aberdein;Kelly Buckle

  • Dry matter intake, nutrient selection and milk production of dairy cows grazing rainfed perennial pastures at different herbage allowances in spring

    P. J. Moate;D. E. Dalley;J. R. Roche;C. Grainger

  • Invited review: An evaluation of the likely effects of individualized feeding of concentrate supplements to pasture-based dairy cows

    J.L. Hills;W.J. Wales;F.R. Dunshea;S.C. Garcia

  • Invited review: reduced milking frequency: milk production and management implications.

    Kerst Stelwagen;C.V.C. Phyn;S.R. Davis;Jocelyne Guinard-Flament

  • Calving body condition score affects indicators of health in grazing dairy cows

    J.R. Roche;K.A. Macdonald;K.E. Schütz;L.R. Matthews

  • Influence of Precalving Feed Allowance on Periparturient Metabolic and Hormonal Responses and Milk Production in Grazing Dairy Cows

    J.R. Roche;E.S. Kolver;J.K. Kay

  • Effects of precalving body condition score and prepartum feeding level on production, reproduction, and health parameters in pasture-based transition dairy cows.

    J.R. Roche;S. Meier;A. Heiser;M.D. Mitchell

Frequent Co-Authors

Jane K. Kay
Jane K. Kay University of Arizona
Murray D. Mitchell
Murray D. Mitchell Queensland University of Technology
Juan J. Loor
Juan J. Loor University of Illinois at Urbana-Champaign
Donagh P. Berry
Donagh P. Berry Teagasc - The Irish Agriculture and Food Development Authority
Peter J. Moate
Peter J. Moate University of Melbourne
Scott McDougall
Scott McDougall Massey University
Raymond C. Boston
Raymond C. Boston St Vincent's Hospital
Russell G. Snell
Russell G. Snell University of Auckland
Pat Dillon
Pat Dillon Teagasc - The Irish Agriculture and Food Development Authority
Dominique Blache
Dominique Blache University of Western Australia

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