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Animal Science and Veterinary
New Zealand
2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Animal Science and Veterinary 59 342 315 5 5 282 12990

John R. Roche publications per year

The chart shows the history of publications by John R. Roche between 1979 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. John R. Roche published across 47 years, from 1979 to 2025, averaging 6.7 papers a year. Output peaked at 22 publications in 2013. 7 of the 313 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1979 to 2025. Vertical axis: number of publications, 0 to 22. Peak 22 publications in 2013. 1979: 3 publications 1980: 0 publications 1981: 1 publication 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 0 publications 1988: 1 publication 1989: 1 publication 1990: 1 publication 1991: 0 publications 1992: 0 publications 1993: 0 publications 1994: 0 publications 1995: 5 publications 1996: 1 publication 1997: 3 publications 1998: 4 publications 1999: 7 publications 2000: 10 publications 2001: 11 publications 2002: 14 publications 2003: 10 publications 2004: 6 publications 2005: 15 publications 2006: 13 publications 2007: 16 publications 2008: 9 publications 2009: 17 publications 2010: 13 publications 2011: 15 publications 2012: 7 publications 2013: 22 publications 2014: 8 publications 2015: 13 publications 2016: 15 publications 2017: 14 publications 2018: 9 publications 2019: 8 publications 2020: 12 publications 2021: 7 publications 2022: 5 publications 2023: 10 publications 2024: 3 publications 2025: 4 publications
1979 2025

313 publications in total across all disciplines

View publications per year as a table
John R. Roche: publications per year, 1979 to 2025
Year Publications
1979 3
1980 0
1981 1
1982 0
1983 0
1984 0
1985 0
1986 0
1987 0
1988 1
1989 1
1990 1
1991 0
1992 0
1993 0
1994 0
1995 5
1996 1
1997 3
1998 4
1999 7
2000 10
2001 11
2002 14
2003 10
2004 6
2005 15
2006 13
2007 16
2008 9
2009 17
2010 13
2011 15
2012 7
2013 22
2014 8
2015 13
2016 15
2017 14
2018 9
2019 8
2020 12
2021 7
2022 5
2023 10
2024 3
2025 4
Total 313
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John R. Roche publication distribution in Animal Science and Veterinary in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Animal Science and Veterinary in 2026. The highlighted bar marks where John R. Roche sits on this spectrum.

No. of scientists
25 50 75 100
Bar chart with 84 bars. Horizontal axis: publications, 29–33 to 442+. Vertical axis: number of scientists, 0 to 109. Most scientists, 109, have 119–123 publications. The last bar groups every scientist with 442 publications or more. The highlighted bar, 279–283 publications, is where this scientist sits. 29–33 publications: 1 scientist 34–38 publications: 6 scientists 39–43 publications: 17 scientists 44–48 publications: 23 scientists 49–53 publications: 28 scientists 54–58 publications: 44 scientists 59–63 publications: 66 scientists 64–68 publications: 75 scientists 69–73 publications: 71 scientists 74–78 publications: 85 scientists 79–83 publications: 108 scientists 84–88 publications: 105 scientists 89–93 publications: 84 scientists 94–98 publications: 103 scientists 99–103 publications: 97 scientists 104–108 publications: 95 scientists 109–113 publications: 89 scientists 114–118 publications: 88 scientists 119–123 publications: 109 scientists 124–128 publications: 93 scientists 129–133 publications: 89 scientists 134–138 publications: 95 scientists 139–143 publications: 92 scientists 144–148 publications: 80 scientists 149–153 publications: 75 scientists 154–158 publications: 74 scientists 159–163 publications: 67 scientists 164–168 publications: 53 scientists 169–173 publications: 62 scientists 174–178 publications: 63 scientists 179–183 publications: 50 scientists 184–188 publications: 55 scientists 189–193 publications: 50 scientists 194–198 publications: 27 scientists 199–203 publications: 44 scientists 204–208 publications: 31 scientists 209–213 publications: 28 scientists 214–218 publications: 38 scientists 219–223 publications: 33 scientists 224–228 publications: 36 scientists 229–233 publications: 29 scientists 234–238 publications: 35 scientists 239–243 publications: 23 scientists 244–248 publications: 24 scientists 249–253 publications: 29 scientists 254–258 publications: 28 scientists 259–263 publications: 21 scientists 264–268 publications: 25 scientists 269–273 publications: 11 scientists 274–278 publications: 18 scientists 279–283 publications: 13 scientists 284–288 publications: 18 scientists 289–293 publications: 10 scientists 294–298 publications: 12 scientists 299–303 publications: 11 scientists 304–308 publications: 15 scientists 309–313 publications: 14 scientists 314–318 publications: 14 scientists 319–323 publications: 8 scientists 324–328 publications: 8 scientists 329–333 publications: 13 scientists 334–338 publications: 14 scientists 339–343 publications: 13 scientists 344–348 publications: 10 scientists 349–353 publications: 11 scientists 354–358 publications: 5 scientists 359–363 publications: 8 scientists 364–368 publications: 8 scientists 369–373 publications: 6 scientists 374–378 publications: 7 scientists 379–383 publications: 8 scientists 384–388 publications: 3 scientists 389–393 publications: 4 scientists 394–398 publications: 5 scientists 399–403 publications: 8 scientists 404–408 publications: 5 scientists 409–413 publications: 4 scientists 414–418 publications: 3 scientists 419–423 publications: 8 scientists 424–428 publications: 5 scientists 429–433 publications: 3 scientists 434–438 publications: 5 scientists 439–441 publications: 5 scientists 442+ publications: 99 scientists
29–33 publications 442+

This scientist: 282 publications — 88th percentile

88% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 442 publications or more.

View publications distribution as a table
Number of Animal Science and Veterinary scientists by publication count, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
Publications Scientists This scientist
29–33 1
34–38 6
39–43 17
44–48 23
49–53 28
54–58 44
59–63 66
64–68 75
69–73 71
74–78 85
79–83 108
84–88 105
89–93 84
94–98 103
99–103 97
104–108 95
109–113 89
114–118 88
119–123 109
124–128 93
129–133 89
134–138 95
139–143 92
144–148 80
149–153 75
154–158 74
159–163 67
164–168 53
169–173 62
174–178 63
179–183 50
184–188 55
189–193 50
194–198 27
199–203 44
204–208 31
209–213 28
214–218 38
219–223 33
224–228 36
229–233 29
234–238 35
239–243 23
244–248 24
249–253 29
254–258 28
259–263 21
264–268 25
269–273 11
274–278 18
279–283 13 282
284–288 18
289–293 10
294–298 12
299–303 11
304–308 15
309–313 14
314–318 14
319–323 8
324–328 8
329–333 13
334–338 14
339–343 13
344–348 10
349–353 11
354–358 5
359–363 8
364–368 8
369–373 6
374–378 7
379–383 8
384–388 3
389–393 4
394–398 5
399–403 8
404–408 5
409–413 4
414–418 3
419–423 8
424–428 5
429–433 3
434–438 5
439–441 5
442+ 99
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John R. Roche D-index placement in Animal Science and Veterinary in 2026

The chart shows the D-index (discipline H-index) distribution of Animal Science and Veterinary scientists ranked by Research.com in 2026. The highlighted bar marks where John R. Roche sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 58 bars. Horizontal axis: D-Index, 20 to 77+. Vertical axis: number of scientists, 0 to 158. Most scientists, 158, have 31 D-Index. The last bar groups every scientist with 77 D-Index or more. The highlighted bar, 59 D-Index, is where this scientist sits. 20 D-Index: 5 scientists 21 D-Index: 22 scientists 22 D-Index: 31 scientists 23 D-Index: 44 scientists 24 D-Index: 53 scientists 25 D-Index: 66 scientists 26 D-Index: 80 scientists 27 D-Index: 101 scientists 28 D-Index: 106 scientists 29 D-Index: 116 scientists 30 D-Index: 154 scientists 31 D-Index: 158 scientists 32 D-Index: 143 scientists 33 D-Index: 137 scientists 34 D-Index: 126 scientists 35 D-Index: 134 scientists 36 D-Index: 112 scientists 37 D-Index: 115 scientists 38 D-Index: 105 scientists 39 D-Index: 111 scientists 40 D-Index: 107 scientists 41 D-Index: 87 scientists 42 D-Index: 74 scientists 43 D-Index: 62 scientists 44 D-Index: 61 scientists 45 D-Index: 41 scientists 46 D-Index: 51 scientists 47 D-Index: 43 scientists 48 D-Index: 28 scientists 49 D-Index: 47 scientists 50 D-Index: 40 scientists 51 D-Index: 34 scientists 52 D-Index: 33 scientists 53 D-Index: 43 scientists 54 D-Index: 16 scientists 55 D-Index: 32 scientists 56 D-Index: 21 scientists 57 D-Index: 18 scientists 58 D-Index: 28 scientists 59 D-Index: 33 scientists 60 D-Index: 17 scientists 61 D-Index: 21 scientists 62 D-Index: 18 scientists 63 D-Index: 21 scientists 64 D-Index: 9 scientists 65 D-Index: 20 scientists 66 D-Index: 11 scientists 67 D-Index: 16 scientists 68 D-Index: 12 scientists 69 D-Index: 17 scientists 70 D-Index: 13 scientists 71 D-Index: 15 scientists 72 D-Index: 11 scientists 73 D-Index: 11 scientists 74 D-Index: 14 scientists 75 D-Index: 5 scientists 76 D-Index: 6 scientists 77+ D-Index: 100 scientists
20 D-Index 77+

This scientist: 59 D-Index — 89th percentile

89% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 77 D-Index or more.

View D-Index distribution as a table
Number of Animal Science and Veterinary scientists by D-index, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
D-Index Scientists This scientist
20 5
21 22
22 31
23 44
24 53
25 66
26 80
27 101
28 106
29 116
30 154
31 158
32 143
33 137
34 126
35 134
36 112
37 115
38 105
39 111
40 107
41 87
42 74
43 62
44 61
45 41
46 51
47 43
48 28
49 47
50 40
51 34
52 33
53 43
54 16
55 32
56 21
57 18
58 28
59 33 59
60 17
61 21
62 18
63 21
64 9
65 20
66 11
67 16
68 12
69 17
70 13
71 15
72 11
73 11
74 14
75 5
76 6
77+ 100
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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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