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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Animal Science and Veterinary 32 2145 1959 121 111 200 3747

Roy N. Kirkwood publications per year

The chart shows the history of publications by Roy N. Kirkwood between 1979 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Roy N. Kirkwood published across 48 years, from 1979 to 2026, averaging 4.6 papers a year. Output peaked at 16 publications in 2018. 17 of the 222 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1979 to 2026. Vertical axis: number of publications, 0 to 16. Peak 16 publications in 2018. 1979: 1 publication 1980: 2 publications 1981: 3 publications 1982: 0 publications 1983: 1 publication 1984: 0 publications 1985: 2 publications 1986: 1 publication 1987: 2 publications 1988: 4 publications 1989: 5 publications 1990: 3 publications 1991: 8 publications 1992: 5 publications 1993: 2 publications 1994: 2 publications 1995: 3 publications 1996: 1 publication 1997: 2 publications 1998: 6 publications 1999: 2 publications 2000: 2 publications 2001: 5 publications 2002: 3 publications 2003: 3 publications 2004: 3 publications 2005: 5 publications 2006: 1 publication 2007: 2 publications 2008: 4 publications 2009: 5 publications 2010: 6 publications 2011: 5 publications 2012: 3 publications 2013: 4 publications 2014: 4 publications 2015: 6 publications 2016: 6 publications 2017: 11 publications 2018: 16 publications 2019: 6 publications 2020: 7 publications 2021: 14 publications 2022: 11 publications 2023: 10 publications 2024: 8 publications 2025: 16 publications 2026: 1 publication
1979 2026

222 publications in total across all disciplines

View publications per year as a table
Roy N. Kirkwood: publications per year, 1979 to 2026
Year Publications
1979 1
1980 2
1981 3
1982 0
1983 1
1984 0
1985 2
1986 1
1987 2
1988 4
1989 5
1990 3
1991 8
1992 5
1993 2
1994 2
1995 3
1996 1
1997 2
1998 6
1999 2
2000 2
2001 5
2002 3
2003 3
2004 3
2005 5
2006 1
2007 2
2008 4
2009 5
2010 6
2011 5
2012 3
2013 4
2014 4
2015 6
2016 6
2017 11
2018 16
2019 6
2020 7
2021 14
2022 11
2023 10
2024 8
2025 16
2026 1
Total 222
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Roy N. Kirkwood 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 Roy N. Kirkwood 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, 199–203 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: 200 publications — 74th percentile

74% 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 44 200
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
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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Roy N. Kirkwood 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 Roy N. Kirkwood 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, 32 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: 32 D-Index — 34th percentile

34% 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 32
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
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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Overview

Roy N. Kirkwood is affiliated with the University of Adelaide in Australia and has a research focus primarily within Agricultural and Biological Sciences, Medicine, and Veterinary fields. Their body of work spans various subfields including Animal Science and Zoology, Small Animals, Public Health, Environmental and Occupational Health, Infectious Diseases, and Family Practice.

The research topics explored by Kirkwood extensively cover Animal Behavior and Welfare Studies, Animal Nutrition and Physiology, Effects of Environmental Stressors on Livestock, Innovations in Medical Education, Clinical Reasoning and Diagnostic Skills, Gut microbiota and health, as well as Clostridium difficile and Clostridium perfringens research.

They have contributed to numerous scientific papers published in frequently appearing venues such as:

  • Animals
  • Veterinary Sciences
  • Theriogenology
  • Encyclopedia
  • Animal - science proceedings

Some recent papers by Kirkwood include:

  • Are Larger Litters a Concern for Piglet Survival or An Effectively Manageable Trait? (2020, Animals)
  • Piglet Viability: A Review of Identification and Pre-Weaning Management Strategies (2021, Animals)
  • Managing prolific sows in tropical environments (2022, Molecular Reproduction and Development)
  • Review: Can early-life establishment of the piglet intestinal microbiota influence production outcomes? (2021, animal)
  • Factors Associated with Farrowing Duration in Hyperprolific Sows in a Free Farrowing System under Tropical Conditions (2022, Animals)

Kirkwood regularly collaborates with a group of frequent co-authors, notable among them are:

  • Kiro Petrovski
  • K.J. Plush
  • B.S. Tucker
  • Padet Tummaruk
  • T.L. Nowland

Best Publications

  • Nutrition and sow prolificacy.

    F X Aherne;R N Kirkwood

  • Energy intake, body composition and reproductive performance of the gilt.

    R. N. Kirkwood;F. X. Aherne

  • Defining the "core microbiome" of the microbial communities in the tonsils of healthy pigs

    Beth A Lowe;Terence L Marsh;Natasha Isaacs-Cosgrove;Roy N Kirkwood;Roy N Kirkwood

  • Small intestinal morphology and bacterial populations in ileal digesta and feces of newly weaned pigs receiving a high dietary level of zinc oxide

    Unknown

  • THE INFLUENCE OF FEEDING LEVEL DURING LACTATION ON THE OCCURRENCE AND ENDOCRINOLOGY OF THE POSTWEANING ESTRUS IN SOWS

    R. N. Kirkwood;S. K. Baidoo;F. X. Aherne;A. P. Sather

  • Effect of feed intake during lactation and after weaning on sow reproductive performance

    S. K. Baidoo;F. X. Aherne;R. N. Kirkwood;G. R. Foxcroft

  • Development and Function of the Intestinal Microbiome and Potential Implications for Pig Production.

    Tanya L. Nowland;Kate J. Plush;Mary Barton;Roy N. Kirkwood

  • Relationships between backfat depth and plasma leptin during lactation and sow reproductive performance after weaning

    F. De Rensis;M. Gherpelli;P. Superchi;R.N. Kirkwood

  • Consequences of different patterns of feed intake during the estrous cycle in gilts on subsequent fertility.

    F. R. C. L. Almeida;R. N. Kirkwood;F. X. Aherne;G. R. Foxcroft

  • Microbial communities in the tonsils of healthy pigs

    Beth A. Lowe;Terence L. Marsh;Natasha Isaacs-Cosgrove;Roy N. Kirkwood

  • Thawing boar semen in the presence of seminal plasma: Effects on sperm quality and fertility.

    J.C. Garcia;J.C. Dominguez;F.J. Pena;B. Alegre

  • Prostaglandin F2α and control of reproduction in female swine: a review.

    F. De Rensis;R. Saleri;P. Tummaruk;M. Techakumphu

  • Effects of pre- and postpubertal feeding on production traits at first and second estrus in gilts.

    E Beltranena;F X Aherne;G R Foxcroft;R N Kirkwood

  • Influence of boar contact on attainment of puberty in gilts after removal of the olfactory bulbs

    Unknown

  • Effects of extender, incubation temperature, and added seminal plasma on capacitation of cryopreserved, thawed boar sperm as determined by chlortetracycline staining

    Melissa L. Vadnais;Roy N. Kirkwood;David J. Specher;Karen Chou

  • Effect of single or double insemination on fertility of sows bred at an induced estrus and ovulation

    Glen Cassar;Roy N. Kirkwood;Zvonimir Poljak;Kristina Bennett-Steward

  • Are Larger Litters a Concern for Piglet Survival or an Effectively Manageable Trait

    Sophia A. Ward;Roy N. Kirkwood;Kate J. Plush

  • Impact of boar exposure on puberty attainment and breeding outcomes in gilts

    J.L. Patterson;H.J. Willis;R.N. Kirkwood;G.R. Foxcroft

  • Dissemination and persistence of extended-spectrum cephalosporin-resistance encoding IncI1-blaCTXM-1 plasmid among Escherichia coli in pigs.

    Sam Abraham;Roy N. Kirkwood;Tanya Laird;Sugiyono Saputra;Sugiyono Saputra

  • Endocrinology of nutritional flushing in gilts.

    E. Beltranena;G. R. Foxcroft;F. X. Aherne;R. N. Kirkwood

  • THE INFLUENCE OF EXOGENOUS GROWTH HORMONE ON OVULATION RATE IN GILTS

    R. N. Kirkwood;P. A. Thacker;A. D. Gooneratne;B. L. Guedo

  • The influence of age at first boar contact on puberty attainment in the gilt

    Unknown

  • THE INFLUENCE OF FEEDING LEVEL DURING LACTATION AND GESTATION ON THE ENDOCRINE STATUS AND REPRODUCTIVE PERFORMANCE OF SECOND PARITY SOWS

    R. N. Kirkwood;S. K. Baidoo;F. X. Aherne

  • Development and transmission of antimicrobial resistance among Gram-negative bacteria in animals and their public health impact.

    Shewli Mukerji;Mark O’Dea;Mary Barton;Roy Kirkwood

  • Control of estrus and ovulation: Fertility to timed insemination of gilts and sows

    F. De Rensis;R.N. Kirkwood

  • Dietary Protein Intake and Stage of Lactation Differentially Modulate Amino Acid Transporter mRNA Abundance in Porcine Mammary Tissue

    Juliana Pérez Laspiur;Jeanne L. Burton;Patty S. D Weber;Julie Moore

  • Effect of cooling and seminal plasma on the capacitation status of fresh boar sperm as determined using chlortetracycline assay.

    Melissa L. Vadnais;R.N. Kirkwood;R.J. Tempelman;D.J. Sprecher

  • The influence of dietary energy intake during successive lactations on sow prolificacy

    R. N. Kirkwood;B. N. Mitaru;A. D. Gooneratne;R. Blair

  • Effect of lactation feed intake on endocrine status and metabolite levels in sows

    S. K. Baidoo;E. S. Lythgoe;R. N. Kirkwood;F. X. Aherne

Frequent Co-Authors

Robert M. Friendship
Robert M. Friendship University of Guelph
Philip A. Thacker
Philip A. Thacker University of Saskatchewan
F. X. Aherne
F. X. Aherne University of Alberta
Matti Kiupel
Matti Kiupel Michigan State University
Darren J. Trott
Darren J. Trott University of Adelaide
Robert J. Tempelman
Robert J. Tempelman Michigan State University
Lorraine M. Sordillo
Lorraine M. Sordillo Michigan State University
Michael P. Reichel
Michael P. Reichel City University of Hong Kong
Adroaldo J. Zanella
Adroaldo J. Zanella Universidade de São Paulo
Juan P. Steibel
Juan P. Steibel Michigan State University

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Related Online Degrees & Career Pathways

Exploring Animal Science and Veterinary studies often opens doors to diverse career paths that extend beyond traditional roles. For individuals interested in behavioral analysis, pursuing bcba masters programs can provide specialized knowledge in applied behavior analysis, complementing animal behavior expertise.

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For advanced psychology careers, apa-accredited psyd programs offer pathways without GRE requirements, making it more accessible for professionals looking to integrate behavioral science with veterinary care practices.

Additionally, addressing addiction and recovery through animal-assisted therapy is an emerging field. To become involved, one can explore how to become a drug counselor online, blending counseling expertise with the therapeutic benefits of animals.

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