APrf Roy Kirkwood
Associate Professor
School of Animal and Veterinary Sciences
College of Science
Eligible to supervise Masters and PhD - email supervisor to discuss availability.
Originally from the UK, I completed my BSc in zoology with applied zoology from the University of Wales before undertaking a PhD programme at the University of Leed researching boar effects on gilt puberty. I then moved to Massey University in New Zealand for 2 years researching the impact of lactation length on sow fertility. I then moved to Canada and conducted research in various areas, including nutritional effects on sow fertility. I received my DVM from Saskatchewan in 1995 and moved back to Alberta as the provincial swine research veterinarian. In 1999 I moved to the Royal Veterinary College (London) as a senior lecturer before moving to Michigan State University College of Veterinary Medicine in 2001. I relocated to the University of Adelaide in 2011.
| Date | Position | Institution name |
|---|---|---|
| 2011 - ongoing | Associate professor | University of Adelaide |
| 2001 - 2011 | Associate professor | Michigan State University |
| 1999 - 2001 | Senior lecturer | Royal Veterinary College |
| 1995 - 1999 | Research veterinarian | Government of alberta |
| 1987 - 1995 | Research Scientist | University of Saskatchewan |
| 1984 - 1987 | Post doctoral fellow | University of Alberta |
| 1982 - 1984 | Post doctoral fellow | Massey University |
| 1981 - 1982 | Post doctoral fellow | University of Leeds |
| Date | Institution name | Country | Title |
|---|---|---|---|
| University College of North Wales | United Kingdom | BSc | |
| University of Leeds | United Kingdom | PhD | |
| University of Saskatchewan | Canada | DVM |
| Date | Title | Institution name | Country |
|---|---|---|---|
| — | Diplomate | European College of Animal Reproduction | - |
| Year | Citation |
|---|---|
| 2026 | Uddin, A. M., Werid, G. M., Van, T. D., Song, Y., Garg, S., Kirkwood, R. N., & Petrovski, K. R. (2026). Injectable or non-injectable GnRH analogues for control of swine reproduction. A systematic review and meta-analysis. Theriogenology, 250, 117681-1-117681-9. |
| 2026 | Thu, P. P. P., Kirkwood, R. N., & Am-in, N. (2026). Effects of gestational anemia on farrowing duration and reproductive outcomes in highly prolific sows in a tropical climate. Theriogenology, 250, 6 pages. |
| 2025 | Adi, Y. K., Kirkwood, R. N., & Tummaruk, P. (2025). Newborn traits influencing piglet mortality within the first day and between days 1 and 7 after birth in highly prolific sows in tropical environments.. Theriogenology, 246, 117551. Scopus3 WoS3 Europe PMC1 |
| 2025 | Werid, G. M., Ibrahim, Y. M., Girmay, G., Hemmatzadeh, F., Miller, D., Kirkwood, R., & Petrovski, K. (2025). Bovine adenovirus prevalence and its role in bovine respiratory disease complex: A systematic review and meta-analysis. Veterinary Journal, 310, 12 pages. Scopus1 |
| 2025 | Petrovski, K. R., & Kirkwood, R. N. (2025). Common Biases, Difficulties, and Errors in Clinical Reasoning in Veterinary Medical Encounters with a Case Example. Encyclopedia, 5(1), 14. |
| 2025 | Manjunath, D., Sampath, H., Kirkwood, R. N., Santhosh, S., & Sankarganesh, D. (2025). Behavioral and neurobiological implications of kairomones for rodents: an updated review. Frontiers in Neuroscience, 19, 14 pages. Scopus1 WoS1 Europe PMC1 |
| 2025 | Uddin, A. H. M. M., Kirkwood, R. N., Petrovski, K. R., Youssef, S. H., Singh, B., Mukhopadhyay, S., . . . Garg, S. (2025). Evaluation of Permeation Enhancers for Vaginal Delivery of Buserelin Acetate Using a Validated Chromatographic Method and Ex Vivo Porcine Model. Pharmaceutics, 17(9), 1181. |
| 2025 | Uddin, A. H. M. M., Taechamaeteekul, P., Petrovski, K. R., Tummaruk, P., Song, Y., Garg, S., & Kirkwood, R. N. (2025). Development of Timed Release Vaginal Mucosal Cloprostenol for Farrowing Management in Sows. Pharmaceutics, 17(9), 1198. |
| 2024 | Adi, Y. K., Kirkwood, R. N., & Tummaruk, P. (2024). Farrowing performance and piglet characteristics of highly prolific sows in a tropical environment. Thai Journal of Veterinary Medicine, 54(4), 10 pages. Scopus8 WoS6 |
| 2024 | Adi, Y. K., Boonprakob, R., Kirkwood, R. N., & Tummaruk, P. (2024). Factors affecting birth weight and stillbirth in sows housed in a tropical environment.. Reprod Domest Anim, 59(1), 13 pages. Scopus14 WoS14 Europe PMC11 |
| 2024 | Adi, Y. K., Taechamaeteekul, P., Ruampatana, J., Malison, M., Suwimonteerabutr, J., Kirkwood, R. N., & Tummaruk, P. (2024). Influence of prepartum feed levels on colostrum production and farrowing performance in highly prolific sows in a tropical environment.. Animal : an international journal of animal bioscience, 18(2), 101066. Scopus8 WoS8 Europe PMC6 |
| 2024 | Craig, S., Khaw, S. -E. R., Petrovski, K. R., & Kirkwood, R. N. (2024). Effect of Feeding a Calcium Chloride Supplement on Sow Stillbirth Rate.. Animals : an open access journal from MDPI, 14(3), 516. Scopus3 WoS3 Europe PMC1 |
| 2024 | Werid, G. M., Van, T. D., Miller, D., Hemmatzadeh, F., Fulton, R. W., Kirkwood, R., & Petrovski, K. (2024). Bovine Parainfluenza-3 Virus Detection Methods and Prevalence in Cattle: A Systematic Review and Meta-Analysis. Animals, 14(3), 494-1-494-20. Scopus8 WoS7 Europe PMC5 |
| 2024 | Carr, A. N., Ferlini Agne, G., Kirkwood, R. N., & Petrovski, K. R. (2024). Teaching Clinical Reasoning to Veterinary Medical Learners with a Case Example. Encyclopedia, 4(2), 753-775. Scopus4 |
| 2024 | Homer, B., Barekatain, R., Petrovski, K. R., Plush, K. J., Dwan, C., D’Souza, D. N., . . . Tucker, B. S. (2024). Preweaning Purified Fucoidan Drench: Effects on Growth, Immune Response, and Intestinal Morphology in Weaned Piglets. Animals, 14(10), 1472. Scopus3 WoS3 Europe PMC2 |
| 2024 | Adi, Y. K., Taechamaeteekul, P., Kesdangsakonwut, S., Tienthai, P., Kirkwood, R. N., & Tummaruk, P. (2024). Exploring Hyperprolific Sows: A Study of Gross Morphology of Reproductive Organs and Oxytocin Receptor Distribution across Parities. Animals, 14(13), 1846. Scopus7 WoS7 Europe PMC5 |
| 2024 | Ferlini Agne, G., Carr, A. M. N., Kirkwood, R. N., & Petrovski, K. R. (2024). Assisting the Learning of Clinical Reasoning by Veterinary Medical Learners with a Case Example. Veterinary Sciences, 11(9), 11090433-1-11090433-24. Scopus4 WoS2 Europe PMC4 |
| 2023 | McIlfatrick, S., O'Leary, S., Okada, T., Penn, A., Nguyen, V. H. T., McKenny, L., . . . St. John, J. C. (2023). Does supplementation of oocytes with additional mtDNA influence developmental outcome?. iScience, 26(2), 105956-1-105956-27. Scopus3 WoS3 Europe PMC3 |
| 2023 | Jarratt, L., James, S. E., Kirkwood, R. N., & Nowland, T. L. (2023). Effects of Caffeine and Glucose Supplementation at Birth on Piglet Pre-Weaning Growth, Thermoregulation, and Survival.. Animals (Basel), 13(3), 1-8. Scopus9 WoS9 Europe PMC10 |
| 2023 | Carr, A. N., Kirkwood, R. N., & Petrovski, K. R. (2023). The Art and Science of Consultations in Bovine Medicine: Use of Modified Calgary-Cambridge Guides, Part 2. Macedonian Veterinary Review, 0(0), 5-16. Scopus5 WoS3 |
| 2023 | Tucker, B. S., Jorquera-Chavez, M., Petrovski, K. R., Craig, J. R., Morrison, R. S., Smits, R. J., & Kirkwood, R. N. (2023). Comparing surface temperature locations with rectal temperature in neonatal piglets under production conditions. Journal of Applied Animal Research, 51(1), 212-219. Scopus1 WoS1 |
| 2023 | Uddin, A. H. M. M., Song, Y., Garg, S., Petrovski, K. R., & Kirkwood, R. N. (2023). Control of ovarian function using non-injection technologies for GnRH administration. Journal of Drug Delivery Science and Technology, 84(84, article no. 104502), 7 pages. Scopus2 WoS2 |
| 2023 | Uddin, A. H. M. M., Petrovski, K. R., Song, Y., Garg, S., & Kirkwood, R. N. (2023). Application of Exogenous GnRH in Food Animal Production. Animals, 13(12), 1891-1-1891-14. Scopus12 WoS13 Europe PMC8 |
| 2023 | Carr, A. N., Kirkwood, R. N., & Petrovski, K. R. (2023). Use of Effective Feedback in Veterinary Clinical Teaching. Encyclopedia, 3(3), 928-946. Scopus2 |
| 2023 | Tucker, B. S., Petrovski, K. R., Craig, J. R., Morrison, R. S., Smits, R. J., & Kirkwood, R. N. (2023). Associations between Surface and Rectal Temperature Profiles of Low-Birth-Weight Piglets. Animals, 13(20), 1-8. Scopus2 WoS1 Europe PMC1 |
| 2023 | Tummaruk, P., De Rensis, F., & Kirkwood, R. N. (2023). Managing prolific sows in tropical environments.. Molecular reproduction and development, 90(7), 533-545. Scopus36 WoS36 Europe PMC25 |
| 2022 | Sankarganesh, D., Kirkwood, R. N., Nagnan-Le Meillour, P., Angayarkanni, J., Achiraman, S., & Archunan, G. (2022). Pheromones, binding proteins, and olfactory systems in the pig (<i>Sus scrofa</i>): An updated review.. Frontiers in veterinary science, 9, 1-10. Scopus10 WoS9 Europe PMC8 |
| 2022 | Carr, A. N. M., Kirkwood, R. N., & Petrovski, K. R. (2022). Effective Veterinary Clinical Teaching in a Variety of Teaching Settings. Veterinary Sciences, 9(1), 1-16. Scopus15 WoS13 Europe PMC6 |
| 2022 | Ward, S. A., Kirkwood, R. N., Plush, K. J., Abdella, S., Song, Y., & Garg, S. (2022). Development of a Novel Vaginal Drug Delivery System to Control Time of Farrowing and Allow Supervision of Piglet Delivery. Pharmaceutics, 14(2), 17 pages. Scopus7 WoS7 Europe PMC2 |
| 2022 | Tucker, B. S., Petrovski, K. R., Craig, J. R., Morrison, R. S., Smits, R. J., & Kirkwood, R. N. (2022). Piglet Morphology: Indicators of Neonatal Viability?. Animals : an open access journal from MDPI, 12(5), 1-13. Scopus6 WoS6 Europe PMC4 |
| 2022 | Ward, S. A., Kirkwood, R. N., Song, Y., Garg, S., & Plush, K. J. (2022). Effect of Dexamethasone and Route of Administration on Sow Farrowing Behaviours, Piglet Delivery and Litter Performance. Animals, 12(7), 1-10. Scopus7 WoS6 Europe PMC5 |
| 2022 | Tucker, B. S., Petrovski, K. R., & Kirkwood, R. N. (2022). Neonatal Piglet Temperature Changes: Effect of Intraperitoneal Warm Saline Injection. Animals, 12(10), 1-11. Scopus10 WoS9 Europe PMC8 |
| 2022 | Tucker, B. S., Petrovski, K. R., Craig, J. R., Morrison, R. S., Smits, R. J., & Kirkwood, R. N. (2022). Increased feeding frequency prior to farrowing: effects on sow performance. Translational Animal Science, 6(1), 1-7. Scopus5 WoS5 Europe PMC5 |
| 2022 | Carr, A. M. N., Kirkwood, R. N., & Petrovski, K. R. (2022). Facilitating Development of Problem-Solving Skills in Veterinary Learners with Clinical Examples. Veterinary Sciences, 9(10), 16 pages. Scopus2 WoS2 Europe PMC1 |
| 2022 | Carr, A. N. M., Kirkwood, R. N., & Petrovski, K. R. (2022). Practical Use of the (Observer)—Reporter—Interpreter—Manager—Expert ((O)RIME) Framework in Veterinary Clinical Teaching with a Clinical Example. Encyclopedia, 2(4), 1666-1677. Scopus7 |
| 2022 | Adi, Y. K., Boonprakob, R., Kirkwood, R. N., & Tummaruk, P. (2022). Factors Associated with Farrowing Duration in Hyperprolific Sows in a Free Farrowing System under Tropical Conditions.. Animals (Basel), 12(21), 1-14. Scopus30 WoS29 Europe PMC19 |
| 2021 | Nowland, T. L., Stanley, D., Kirkwood, R. N., Torok, V., Bajagai, Y. S., Gannon, N. J., & Plush, K. J. (2021). Maternal supplementation with phytogenic additives influenced the faecal microbiota and reproductive potential in sows.. AMB Express, 11(1), 1-11. Scopus7 WoS7 Europe PMC6 |
| 2021 | Plush, K. J., Pluske, J. R., Lines, D. S., Ralph, C. R., & Kirkwood, R. N. (2021). Meloxicam and dexamethasone administration as anti-inflammatory compounds to sows prior to farrowing does not improve lactation performance. Animals, 11(8), 1-11. Scopus6 WoS6 Europe PMC5 |
| 2021 | Sankarganesh, D., Kirkwood, R., Angayarkanni, J., Achiraman, S., & Archunan, G. (2021). Pig pheromones and behaviors: A review. Theriogenology, 175, 1-6. Scopus13 |
| 2021 | Kirkwood, R. N., Langendijk, P., & Carr, J. (2021). Management strategies for improving survival of piglets from hyperprolific sows. Thai Journal of Veterinary Medicine, 51(4), 629-636. Scopus17 WoS17 |
| 2021 | Nowland, T. L., Kirkwood, R. N., & Pluske, J. R. (2021). Review: Can early-life establishment of the piglet intestinal microbiota influence production outcomes?. Animal, 16, 8 pages. Scopus29 WoS29 Europe PMC27 |
| 2021 | Tucker, B. S., Craig, J. R., Morrison, R. S., Smits, R. J., & Kirkwood, R. N. (2021). Piglet viability: A review of identification and pre‐weaning management strategies. Animals, 11(10), 2902. Scopus39 WoS37 Europe PMC28 |
| 2021 | Piñán, J., Martinez-Pastor, F., Alegre, B., Maj, M., Kirkwood, R. N., Domínguez, J. C., & Manjarín, R. (2021). The Suinfort® Semen Supplement Counters Seasonal Infertility in Iberian Sows. Animals, 11(11), 1-7. Scopus2 WoS2 Europe PMC2 |
| 2021 | Piñán, J., Alegre, B., Kirkwood, R. N., Soriano-úbeda, C., Maj, M., Domínguez, J. C., . . . Martínez-Pastor, F. (2021). Effect of season and parity on reproduction performance of iberian sows bred with duroc semen. Animals, 11(11), 3275. Scopus8 WoS6 Europe PMC4 |
| 2021 | Nowland, T. L., Kirkwood, R. N., Torok, V. A., Plush, K. J., & Barton, M. D. (2021). Characterisation of Early Microbial Colonisers within the Spiral Colon of Pre- and Post-Natal Piglets. Life, 11(4), 1-14. Scopus7 WoS8 Europe PMC8 |
| 2021 | Thitachot, K., Sirinopwong, V., Seemuang, V., Ratchatasriprasert, A., Kirkwood, R. N., & Am-In, N. (2021). Influence of backfat thickness and the interval from altrenogest withdrawal to estrus on reproductive performance of gilts. Animals, 11(5), 1-6. Scopus6 WoS5 Europe PMC4 |
| 2021 | Carr, A. N. M., Kirkwood, R. N., & Petrovski, K. R. (2021). Using the Five-Microskills Method in Veterinary Medicine Clinical Teaching.. Veterinary sciences, 8(6), 1-14. Scopus10 WoS6 Europe PMC4 |
| 2021 | Nowland, T. L., Kirkwood, R. N., Plush, K. J., Barton, M. D., & Torok, V. A. (2021). Exposure to Maternal Faeces in Lactation Influences Piglet Enteric Microbiota, Growth and Survival Pre-weaning. Journal of Animal Science, 99(7), 1-10. Scopus13 WoS9 Europe PMC9 |
| 2020 | Ward, S. A., Kirkwood, R. N., & Plush, K. J. (2020). Are larger litters a concern for piglet survival or an effectively manageable trait?. Animals, 10(2), 15 pages. Scopus66 WoS58 Europe PMC41 |
| 2020 | Manjarín, R., García, J. C., Hoving, L., Soede, N. M., Maj, M., Dominguez de Tejerina, J. C., & Kirkwood, R. N. (2020). Ovulatory Response of Weaned Sows to an Altered Ratio of Exogenous Gonadotrophins.. Animals (Basel), 10(3), 4 pages. Scopus2 WoS2 Europe PMC1 |
| 2020 | Nowland, T. L., Torok, V. A., Low, W. Y., Barton, M. D., Plush, K. J., & Kirkwood, R. N. (2020). Faecal microbiota analysis of piglets during lactation. Animals, 10(5), 1-13. Scopus6 WoS7 Europe PMC7 |
| 2020 | Nowland, T. L., & Kirkwood, R. N. (2020). Faecal microbiota transplantation: Is it the future for pig production?. Microbiology Australia, 41(2), 91-94. Scopus2 WoS2 |
| 2020 | Ward, S. A., Kirkwood, R. N., & Plush, K. J. (2020). Administering dexamethasone to prepartum sows: Effects on sow and piglet performance. Livestock Science, 239, 7 pages. Scopus6 WoS6 |
| 2020 | Nowland, T. L., Torok, V. A., Low, W. Y., Plush, K. J., Barton, M. D., & Kirkwood, R. N. (2020). A Single Faecal Microbiota Transplantation Altered the Microbiota of Weaned Pigs.. Life (Basel, Switzerland), 10(9), 17 pages. Scopus8 WoS7 Europe PMC7 |
| 2020 | Am-in, N., Suwimonteerabutr, J., & Kirkwood, R. N. (2020). Serum Anti-Mullerian Hormone and Estradiol Concentrations in Gilts and Their Age at Puberty. Animals, 10(11), 2189. Scopus11 WoS11 Europe PMC7 |
| 2019 | Nowland, T. L., Plush, K. J., Barton, M., & Kirkwood, R. N. (2019). Development and function of the intestinal microbiome and potential implications for pig production. Animals, 9(3), 76-1-76-15. Scopus79 WoS80 Europe PMC71 |
| 2019 | Am-In, N., Techakumphu, M., & Kirkwood, R. N. (2019). Effect of altering the ratio of exogenous gonadotropins on reproductive performance of primiparous sows during the seasonal infertility period. Canadian Journal of Animal Science, 99(1), 202-205. Scopus5 WoS5 |
| 2019 | Ward, S. A., Kirkwood, R. N., & Plush, K. L. (2019). Effects of oxytocin and carbetocin on farrowing performance. Animal Reproduction Science, 205, 88-93. Scopus19 WoS20 Europe PMC14 |
| 2019 | Am-In, N., & Kirkwood, R. (2019). Feeding altrenogest during late lactation improves fertility of primiparous sows nursing smaller litters. Canadian Journal of Veterinary Research, 83(3), 228-230. Scopus3 WoS3 Europe PMC2 |
| 2019 | Ngula, J., Manjarín, R., Martínez-Pastor, F., Alegre, B., Tejedor, I., Brown, T., . . . Domínguez, J. C. (2019). A novel semen supplement (SuinFort) improves sow fertility after artificial insemination. Animal Reproduction Science, 210, 1-7. Scopus4 WoS3 Europe PMC3 |
| 2019 | Manjarín, R., Kirkwood, R. N., Ngula, J., Martinez-Pastor, F., Alegre, B., & Domínguez, J. C. (2019). Effect of Oxytocin, Cloprostenol or Buserelin in Semen Doses on Sow Fertility.. Animals : an open access journal from MDPI, 9(10), 5 pages. Scopus11 WoS11 Europe PMC6 |
| 2019 | Plush, K., Glencorse, D., Alexopoulos, J., Tritton, S., Kirkwood, R., & D souza, D. (2019). Effect of dextrose supplementation in the pre-ovulatory sow diet to reduce seasonal influences on litter birth weight variation. Animals, 9(12), 1-12. Scopus5 |
| 2018 | Seyfang, J., Plush, K., Kirkwood, R., Tilbrook, A., & Ralph, C. (2018). The sex ratio of a litter affects the behaviour of its female pigs until at least 16 weeks of age. Applied Animal Behaviour Science, 200, 45-50. Scopus10 WoS9 |
| 2018 | Seyfang, J., Kirkwood, R., Tilbrook, A., & Ralph, C. (2018). Sex bias of the birth litter affects surge but not tonic LH secretion in gilts.. Journal of animal science, 96(6), 2195-2203. Scopus5 WoS5 Europe PMC5 |
| 2018 | Seyfang, J., Kirkwood, R., Tilbrook, A., & Ralph, C. (2018). The sex ratio of a gilt’s birth litter can affect her fitness as a breeding female. Animal Production Science, 58(9), 1567-1574. Scopus3 WoS3 |
| 2018 | Mazzoni, C., De Rensis, F., & Kirkwood, R. (2018). Effect of prior insemination of dead sperm and gestation housing management on gilt fertility. Animal Reproduction Science, 195, 149-152. |
| 2018 | Abraham, S., Kirkwood, R. N., Laird, T., Saputra, S., Mitchell, T., Singh, M., . . . O'Dea, M. (2018). Dissemination and persistence of extended-spectrum cephalosporin-resistance encoding IncI1-blaCTXM-1 plasmid among Escherichia coli in pigs. The ISME journal, 12(10), 2352-2362. Scopus56 WoS57 Europe PMC48 |
| 2018 | De Rensis, F., Mazzoni, C., Saleri, R., Scollo, A., Plush, K., & Kirkwood, R. (2018). Effect of duration of altrenogest treatment on farrowing rate and litter size of gilts. Animal Production Science, 58(11), 2029-2031. Scopus5 WoS3 |
| 2018 | Manjarín, R., Montano, Y., Kirkwood, R., Bennet, D., & Petrovski, K. (2018). Effect of piglet separation from DAM at birth on colostrum uptake. Canadian Journal of Veterinary Research, 82(3), 239-242. Scopus7 WoS6 Europe PMC3 |
| 2018 | Seyfang, J., Ralph, C., Hebart, M., Tilbrook, A., & Kirkwood, R. (2018). Anogenital distance reflects the sex ratio of a gilt's birth litter and predicts her reproductive success. Journal of Animal Science, 96(9), 3856-3862. Scopus7 WoS6 Europe PMC6 |
| 2017 | Bury, O., McRae, V., Len, J., Plush, K., & Kirkwood, R. N. (2017). Effects of centrifugation and removal of seminal plasma on motility of fresh boar sperm. Thai Journal of Veterinary Medicine, 47(4), 557-562. Scopus4 WoS4 |
| 2017 | Seyfang, J., Kirkwood, R., Tilbrook, A., & Ralph, C. (2017). The pre-ovulatory luteinising hormone surge is affected by the sex ratio of a gilt's birth litter. Animal Production Science, 57(12), 2474. |
| 2017 | Dom, M., Ayalew, W., Glatz, P., Kirkwood, R., & Hughes, P. (2017). Nutrient utilization in grower pigs fed boiled, ensiled or milled sweet potato roots blended with a wheat-based protein concentrate. Animal Feed Science and Technology, 223, 82-89. Scopus3 WoS2 |
| 2017 | Mukerji, S., O'Dea, M., Barton, M., Kirkwood, R., Lee, T., & Abraham, S. (2017). Development and transmission of antimicrobial resistance among Gram-negative bacteria in animals and their public health impact. Essays in Biochemistry, 61(1), 23-35. Scopus52 WoS49 Europe PMC41 |
| 2017 | Chen, T., Turpin, D., Knight, A., Bouwman, E., Soede, N., Kirkwood, R., & Langendijk, P. (2017). Lactational oestrus and reproductive performance following a delayed limited nursing schedule in primiparous sows. Theriogenology, 96, 42-48. Scopus3 WoS3 Europe PMC3 |
| 2017 | De Rensis, F., Ziecik, A., & Kirkwood, R. (2017). Seasonal infertility in gilts and sows: Aetiology, clinical implications and treatments. Theriogenology, 96, 111-117. Scopus44 WoS46 Europe PMC32 |
| 2017 | Seyfang, J., Ralph, C., Tilbrook, A., & Kirkwood, R. (2017). Response to gonadotrophins differs for gilts from female- and male-biased litters. Animal Reproduction Science, 182, 134-137. Scopus6 WoS6 Europe PMC6 |
| 2017 | Am-In, N., Kirkwood, R., & Tantasuparuk, W. (2017). Atrazine contamination of sow feed and water affects the litter sex ratio and increases fetal mortality in Thailand. Canadian Journal of Animal Science, 97(2), 165-168. |
| 2017 | Dom, M., Ayalew, W., Glatz, P., Kirkwood, R., & Hughes, P. (2017). Nutrient utilisation in grower pigs fed a protein concentrate blended with sweet potato roots either boiled or ensiled with or without vines. Animal Production Science, 57(8), 1645-1652. Scopus4 WoS3 |
| 2016 | Dom, M., Ayalew, W., Glatz, P., Kirkwood, R., & Hughes, P. (2016). Nutrient utilisation in grower pigs fed boiled, ensiled or milled cassava roots blended with a high protein concentrate. Journal of South Pacific Agriculture, 19, 22-35. |
| 2016 | Chen, T., Lines, D., Dickson, C., Go, C., Kirkwood, R., & Langendijk, P. (2016). Elevating glucose and insulin secretion by carbohydrate formulation diets in late lactation to improve post-weaning fertility in primiparous sows. Reproduction in Domestic Animals, 51(5), 813-818. Scopus8 WoS5 Europe PMC4 |
| 2016 | Nugroho, W., Kirkwood, R. N., & Reichel, M. P. (2016). Pig Diseases in Papua Province, Indonesia: Aetiology, Eco-epidemiology and Control Options. Springer Science Reviews, 4(1), 25-48. |
| 2016 | Nugroho, W., Cargill, C., Putra, I., Kirkwood, R., Trott, D., Salasia, S., . . . Reichel, M. (2016). Investigations of selected pathogens among village pigs in Central Papua, Indonesia. Tropical Animal Health and Production, 48(1), 29-36. Scopus6 WoS5 Europe PMC3 |
| 2016 | De Rensis, F., & Kirkwood, R. (2016). Control of estrus and ovulation: fertility to timed insemination of gilts and sows. Theriogenology, 86(6), 1460-1466. Scopus63 WoS59 Europe PMC40 |
| 2016 | Seyfang, J., Langendijk, P., Chen, T., Bouwman, E., & Kirkwood, R. (2016). Human chorionic gonadotrophin in early gestation induces growth of estrogenic ovarian follicles and improves primiparous sow fertility during summer. Animal Reproduction Science, 172, 21-25. Scopus9 WoS8 Europe PMC6 |
| 2016 | Kirkwood, R., & De Rensis, F. (2016). Control of estrus in gilts and primiparous sows. Thai Journal of Veterinary Medicine, 46(1), 1-7. Scopus5 WoS4 |
| 2016 | Brean, M., Abraham, S., Hebart, M., & Kirkwood, R. (2016). Influence of parity of birth and suckled sows on piglet nasal mucosal colonization with Haemophilus parasuis. Canadian Veterinary Journal, 57(12), 1281-1283. Scopus5 WoS6 Europe PMC4 |
| 2015 | Seyfang, J., Chen, T., Langendijk, P., & Kirkwood, R. (2015). Administration of human chorionic gonadotropin in early pregnancy increases ovarian activity in sows. Animal Production Science, 55(12), 1508. |
| 2015 | Kirkwood, R. N. (2015). Induction of Parturition in Sows. Thai Journal of Veterinary Medicine, 45(4), 487-491. Scopus15 WoS13 |
| 2015 | Nugroho, W., Cargill, C., Putra, I., Kirkwood, R., Trott, D., Salasia, S., & Reichel, M. (2015). Traditional pig farming practices and productivity in the Jayawijaya region, Papua Province, Indonesia. Tropical Animal Health and Production, 47(3), 495-502. Scopus5 WoS3 Europe PMC2 |
| 2015 | De Rensis, F., Mazzoni, C., Saleri, R., Techakumphu, M., & Kirkwood, R. (2015). Effect of short (10-or 12-day) or standard (14-or 18-day) periods of estrus suppression with allyl trenbolone on estrus synchronization and fertility in pubertal gilts. Journal of Swine Health and Production, 23(2), 97-99. Scopus4 WoS4 |
| 2015 | Hidalgo, D., Cassar, G., Manjarin, R., Dominguez, J., Friendship, R., & Kirkwood, R. (2015). Relationship between vaginal mucus conductivity and time of ovulation in weaned sows. Canadian Journal of Veterinary Research, 79(2), 151-154. Scopus6 WoS4 Europe PMC4 |
| 2015 | Zemitis, J., Bouwman, E., Langendijk, P., Van Wettere, W., & Kirkwood, R. (2015). Postpartum injection of human chorionic gonadotrophin: Effects on sow ovarian follicles. Journal of Swine Health and Production, 23(3), 137-139. Scopus6 WoS5 |
| 2015 | Manjarín, R., Cassar, G., Friendship, R., Garcia, J., Dominguez, J., & Kirkwood, R. (2015). Effect of additional human chorionic gonadotrophin (hcG) on follicular growth and ovulation in gonadotrophin-treated gilts. Canadian Journal of Veterinary Research, 79(3), 210-213. Scopus6 WoS6 Europe PMC2 |
| 2015 | Kirkwood, R., & Kauffold, J. (2015). Advances in Breeding Management and Use of Ovulation Induction for Fixed-time AI. Reproduction in domestic animals = Zuchthygiene, 50(Suppl. 2), 85-89. Scopus27 WoS27 Europe PMC21 |
| 2014 | Hidalgo, D., Friendship, R., Greiner, L., Manjarin, R., Amezcua, M., Dominguez, J., & Kirkwood, R. (2014). Influence of lactation length and gonadotrophins administered at weaning on fertility of primiparous sows. Animal Reproduction Science, 149(3-4), 245-248. Scopus7 WoS6 Europe PMC3 |
| 2014 | Condous, P., Kirkwood, R., & van Wettere, W. (2014). The effect of pre- and post-mating dietary restriction on embryonic survival in gilts. Animal Reproduction Science, 148(3-4), 130-136. Scopus8 WoS9 Europe PMC5 |
| 2014 | Mazzoni, C., Saleri, R., Kirkwood, R., Macchi, E., Mongkol, T., & De Rensis, F. (2014). Double cloprostenol administration during mid luteal phase of oestrous cycle does not modify the interoestrous interval in gilts. Italian Journal of Animal Science, 13(3), 527-529. Scopus1 |
| 2014 | Hidalgo, D., Friendship, R., Greiner, L., Manjarin, R., Amezcua, M., Dominguez, J., & Kirkwood, R. (2014). Influence of gonadotrophin-induced first oestrus on gilt fertility. Reproduction in Domestic Animals, 49(6), 899-902. Scopus3 WoS4 Europe PMC2 |
| 2013 | Subashchandrabose, S., Leveque, R., Kirkwood, R., Kiupel, M., & Mulks, M. (2013). The RNA chaperone Hfq promotes fitness of Actinobacillus pleuropneumoniae during porcine pleuropneumonia. Infection and Immunity, 81(8), 2952-2961. Scopus22 Europe PMC20 |
| 2013 | Nguyen, K., Cassar, G., Friendship, R., Dewey, C., Farzan, A., Kirkwood, R., & Hodgins, D. (2013). An investigation of the impacts of induced parturition, birth weight, birth order, litter size, and sow parity on piglet serum concentrations of immunoglobulin G. Journal of Swine Health and Production, 21(3), 139-143. Scopus16 WoS15 |
| 2013 | Contreras, G., Kirkwood, R., & Sordillo, L. (2013). Mononuclear leukocyte fatty acid composition and inflammatory phenotype in periparturient and lactating sows. Journal of Animal Science, 91(1), 174-187. Scopus3 Europe PMC3 |
| 2013 | Kirkwood, R., Turner, K., & Rutley, D. (2013). Effect of split weaning on sow ovulatory responses to injection of gonadotrophins during lactation. Journal of Swine Health and Production, 21(1), 42-44. Scopus1 WoS1 |
| 2013 | Gordoncillo, M., Donabedian, S., Bartlett, P., Perri, M., Zervos, M., Kirkwood, R., & Febvay, C. (2013). Isolation and molecular characterization of vancomycin-resistant enterococcus faecium from swine in Michigan, USA. Zoonoses and Public Health, 60(5), 319-326. Scopus21 Europe PMC13 |
| 2012 | Lowe, B., Marsh, T., Isaacs-Cosgrove, N., Kirkwood, R., Kiupel, M., & Mulks, M. (2012). Defining the "core microbiome" of the microbial communities in the tonsils of healthy pigs. BMC Microbiology, 12(20), 1-14. Scopus61 WoS60 Europe PMC62 |
| 2012 | De Rensis, F., Saleri, R., Tummaruk, P., Techakumphu, M., & Kirkwood, R. (2012). Prostaglandin F2α and control of reproduction in female swine: A review. Theriogenology, 77(1), 1-11. Scopus57 WoS52 Europe PMC34 |
| 2012 | Manjarin, R., Steibel, J., Kirkwood, R., Taylor, N., & Trottier, N. (2012). Transcript abundance of hormone receptors, mammalian target of rapamycin pathway-related kinases, insulin-like growth factor I, and milk proteins in porcine mammary tissue. Journal of Animal Science, 90(1), 221-230. Scopus18 Europe PMC11 |
| 2012 | Manjarin, R., Zamora, V., Wu, G., Steibel, J., Kirkwood, R., Taylor, N., . . . Trottier, N. (2012). Effect of amino acids supply in reduced crude protein diets on performance, efficiency of mammary uptake, and transporter gene expression in lactating sows. Journal of Animal Science, 90(9), 3088-3100. Scopus38 Europe PMC32 |
| 2011 | Am-in, N., Tantasuparuk, W., Manjarin, R., & Kirkwood, R. (2011). Effect of site of sperm deposition on fertility when sows are inseminated with aged semen. Journal of Swine Health and Production, 19(5), 295-297. Scopus8 WoS7 |
| 2011 | Lowe, B. A., Marsh, T. L., Isaacs-Cosgrove, N., Kirkwood, R. N., Kiupel, M., & Mulks, M. H. (2011). Microbial communities in the tonsils of healthy pigs. Veterinary Microbiology, 147(3-4), 346-357. Scopus54 Europe PMC46 |
| 2011 | Am-in, N., Kirkwood, R., Techakumphu, M., & Tantasuparuk, W. (2011). Lipid profiles of sperm and seminal plasma from boars having normal or low sperm motility. Theriogenology, 75(5), 897-903. Scopus121 Europe PMC73 |
| 2011 | Nguyen, K., Cassar, G., Friendship, R., Dewey, C., Farzan, A., & Kirkwood, R. (2011). Stillbirth and preweaning mortality in litters of sows induced to farrow with supervision compared to litters naturally farrowing sows with minimal supervision. Journal of Swine Health and Production, 19(4), 214-217. Scopus25 |
| 2011 | Garcia, J., Dominguez, J., Manjarin, R., Alegre, B., & Kirkwood, R. (2011). Effect of thawing frozen boar semen in 50% seminal plasma on sow fertility. The Pig Journal, 65, 59-61. |
| 2011 | Manjarin, R., Steibel, J., Zamora, V., Am-in, N., Kirkwood, R., Ernst, C., . . . Trottier, N. (2011). Transcript abundance of amino acid transporters, β-casein, and α-lactalbumin in mammary tissue of periparturient, lactating, and postweaned sows. Journal of Dairy Science, 94(7), 3467-3476. Scopus24 Europe PMC22 |
| 2011 | Hughes, P. E., Smits, J., Xie, Y., & Kirkwood, R. N. (2011). Erratum: Relationships among gilt and sow live weight, P2 backfat depth, and culling rates (Journal of Swine Health and Production (2010) 18 (301-305)). Journal of Swine Health and Production, 19(2), 85. |
| 2010 | Manjarin., Dominguez., Castro., Alegre., Driancourt., & Kirkwood. (2010). Effect of hCG on early luteal serum progesterone concentrations in PG600-treated gilts. Reproduction in Domestic Animals. |
| 2010 | Metzler-Zebeli, B., Caine, W., McFall, M., Miller, B., Ward, T., Kirkwood, R., & Mosenthin, R. (2010). Supplementation of diets for lactating sows with zinc amino acid complex and gastric nutriment-intubation of suckling pigs with zinc methionine on mineral status, intestinal morphology and bacterial translocation in lipopolysaccharide-challenged weaned pigs. Journal of Animal Physiology and Animal Nutrition, 94(2), 237-249. Scopus10 Europe PMC7 |
| 2010 | Zamora, V., Figueroa, J., Martínez, M., Sánchez-Torres, M., Cárdenas, M., & Kirkwood, R. (2010). Sexual behavior of castrated boars treated with prostaglandin F₂α. Theriogenology, 74(1), 100-104. Scopus4 Europe PMC1 |
| 2010 | Garcia, J., Dominguez, J., Pena, F., Alegre, B., Gonzalez, R., Castro, M., . . . Kirkwood, R. (2010). Thawing boar semen in the presence of seminal plasma: Effects on sperm quality and fertility. Animal Reproduction Science, 119(1-2), 160-165. Scopus65 Europe PMC42 |
| 2010 | Cassar, G., Friendship, R., Zak, L., Rogan, D., & Kirkwood, R. (2010). Effect of dose of equine chorionic gonadotrophin on the estrus responses of gilts and weaned sows and effect of the interval between equine chorionic gonadotrophin and luteinizing hormone injections on sow performance. Journal of Swine Health and Production, 18(4), 182-186. Scopus10 |
| 2010 | Manjarin, R., Garcia, J., Dominguez, J., Castro, M., Alegre, B., Munoz, J., & Kirkwood, R. (2010). Effect of gonadotropin treatment on estrus, ovulation, and litter size in weaned and anestrous sows. Journal of Animal Science, 88(7), 2356-2360. Scopus15 Europe PMC8 |
| 2010 | Hughes, P., Smits, R., Xie, Y., & Kirkwood, R. (2010). Relationships among gilt and sow live weight, P2 backfat depth and culling rates. Journal of Swine Health and Production, 18(6), 301-305. Scopus18 |
| 2010 | Am-in, N., Kirkwood, R., Techakumphu, M., & Tantasuparuk, W. (2010). Effect of storage for 24 h at 18 c on sperm quality and a comparison of two assays for sperm membrane lipid peroxidation. Canadian Journal of Animal Science, 90(3), 389-392. Scopus6 |
| 2010 | Ruiz, A., Cassar, G., Kirkwood, R., Friendship, R., Wilson, M., & deGrau, A. (2010). Influence of sperm cell concentration and seminal dose volume on sow fertility. The Pig Journal, 63, 80-82. |
| 2010 | Am-In, N., Kirkwood, R. N., Techakumphu, M., & Tantasuparuk, W. (2010). Lipid peroxidation during storage of boar semen; Comparison of microplate and cuvette spectrophotometric assays. Thai Journal of Veterinary Medicine, 40(1), 138. |
| 2009 | Manjarin, R., Cassar, G., Sprecher, D., Friendship, R., Dominguez, J., & Kirkwood, R. (2009). Effect of eCG or eCG plus hCG on oestrus expression and ovulation in prepubertal gilts. Reproduction in Domestic Animals, 44(3), 411-413. Scopus14 Europe PMC9 |
| 2009 | Manjarin, R., Dominguez, J., Castro, M., Vallado, B., Rodriguez, S., Sprecher, D., . . . Kirkwood, R. (2009). Effect of prior FSH treatment on the estrus and ovulation responses to eCG in prepubertal gilts. Animal Reproduction Science, 110(1-2), 123-127. Scopus7 Europe PMC6 |
| 2009 | Manjarin, R., Dominguez, J., Castro, M., Sprecher, D., Cassar, G., Friendship, R., & Kirkwood, R. (2009). Effect of hCG treatment on the oestrous and ovulation responses to FSH in prepubertal gilts. Reproduction in Domestic Animals, 44(3), 432-434. Scopus6 Europe PMC4 |
| 2009 | Caine, W., Metzler-Zebeli, B., McFall, M., Miller, B., Ward, T., Kirkwood, R., & Mosenthin, R. (2009). Supplementation of diets for gestating sows with zinc amino acid complex and gastric intubation of suckling pigs with zinc-methionine on mineral status, intestinal morphology and bacterial translocation in lipopolysaccharide-challenged early-weaned pigs. Research in Veterinary Science, 86(3), 453-462. Scopus18 Europe PMC12 |
| 2009 | Cassar, G., Friendship, R., & Kirkwood, R. (2009). Low sow reproductive performance related to oestrus detection and timing of insemination. The Pig Journal, 62, 7-9. |
| 2009 | Laspiur, J., Burton, J., Weber, P., Moore, J., Kirkwood, R., & Trottier, N. (2009). Dietary protein intake and stage of lactation differentially modulate amino acid transporter mRNA abundance in porcine mammary tissue. Journal of Nutrition, 139(9), 1677-1684. Scopus36 Europe PMC27 |
| 2009 | Subashchandrabose, S., LeVeque, R., Wagner, T., Kirkwood, R., Kiupel, M., & Mulks, M. (2009). Branched-chain amino acids are required for the survival and virulence of Actinobacillus pleuropneumoniae in swine. Infection and Immunity, 77(11), 4925-4933. Scopus24 Europe PMC22 |
| 2008 | Manjarin, R., Dominguez, J., Castro, M., Alegre, B., Driancourt, M., & Kirkwood, R. (2008). Effect of hCG on early luteal serum progesterone concentrations in PG600-treated gilts. Reproduction in Domestic Animals, 45(3), 555-557. Scopus3 Europe PMC2 |
| 2008 | Cassar, G., Kirkwood, R., Seguin, M., Widowski, T., Farzan, A., Zanella, A., & Friendship, R. (2008). Influence of stage of gestation at grouping and presence of boars on farrowing rate and litter size of group-housed sows. Journal of Swine Health and Production, 16(2), 81-85. Scopus16 |
| 2008 | Zak, L., Foxcroft, G., Aherne, F., & Kirkwood, R. (2008). Role of luteinizing hormone in primiparous sow responses to split weaning. Reproduction in Domestic Animals, 43(4), 445-450. Scopus13 Europe PMC8 |
| 2008 | Pelland, C., Cassar, G., Kirkwood, R., & Friendship, R. (2008). Fertility after intrauterine insemination with conventional or low numbers of spermatozoa in sows with synchronized ovulation. Journal of Swine Health and Production, 16(4), 188-192. Scopus11 |
| 2008 | Kirkwood, R., Vadnais, M., & Abad, M. (2008). Practical application of seminal plasma. Theriogenology, 70(8), 1364-1367. Scopus20 Europe PMC11 |
| 2007 | Kirkwood, R. N., De Rensis, F., Silva, P., Gherpelli, M., Alegre, B., & Dominguez, J. C. (2007). Effect of cloprostenol treatment at artificial insemination on sow fertility. Reproduction in Domestic Animals, 42(1), 26-28. Scopus5 Europe PMC2 |
| 2007 | Jansen, J., Kirkwood, R. N., Zanella, A. J., & Tempelman, R. J. (2007). Influence of gestation housing on sow behavior and fertility. Journal of Swine Health and Production, 15(3), 132-136. Scopus32 |
| 2007 | Garcia, J. C., Abad, M., & Kirkwood, R. N. (2007). Effect of sperm numbers and time of insemination relative to ovulation on sow fertility. Animal Reproduction Science, 100(3-4), 397-401. Scopus15 Europe PMC8 |
| 2007 | Kirkwood, R. N., Laspiur, J. P., Ames, N. K., Moore, J. B., Cegielski, A., & Trottier, N. L. (2007). Mammary gland biopsy does not affect lactation performance in sows. Canadian Journal of Animal Science, 87(2), 281-284. Scopus12 |
| 2007 | Abad, M., Garcia, J. C., Sprecher, D. J., Cassar, G., Friendship, R. M., Buhr, M. M., & Kirkwood, R. N. (2007). Effect of insemination-ovulation interval and addition of seminal plasma on sow fertility to insemination of cryopreserved sperm. Reproduction in Domestic Animals, 42(4), 418-422. Scopus31 Europe PMC17 |
| 2007 | Abad, M., Sprecher, D. J., Ross, P., Friendship, R. M., & Kirkwood, R. N. (2007). Effect of sperm cryopreservation and supplementing semen doses with seminal plasma on the establishment of a sperm reservoir in gilts. Reproduction in Domestic Animals, 42(2), 149-152. Scopus23 Europe PMC15 |
| 2006 | Séguin, M. J., Friendship, R. M., Kirkwood, R. N., Zanella, A. J., & Widowski, T. M. (2006). Effects of boar presence on agonistic behavior, shoulder scratches, and stress response of bred sows at mixing. Journal of Animal Science, 84(5), 1227-1237. Scopus22 Europe PMC8 |
| 2005 | De Rensis, F., Gherpelli, M., Superchi, P., & Kirkwood, R. N. (2005). Relationships between backfat depth and plasma leptin during lactation and sow reproductive performance after weaning. Animal Reproduction Science, 90(1-2), 95-100. Scopus61 Europe PMC41 |
| 2005 | Cassar, G., Kirkwood, R. N., Poljak, Z., Bennett-Steward, K., & Friendship, R. M. (2005). Effect of single or double insemination on fertility of sows bred at an induced estrus and ovulation. Journal of Swine Health and Production, 13(5), 254-258. Scopus41 |
| 2005 | Vadnais, M. L., Kirkwood, R. N., Tempelman, R. J., Sprecher, D. J., & Chou, K. (2005). Effect of cooling and seminal plasma on the capacitation status of fresh boar sperm as determined using chlortetracycline assay. Animal Reproduction Science, 87(1-2), 121-132. Scopus30 Europe PMC24 |
| 2005 | Cassar, G., Kirkwood, R. N., Friendship, R., & Poljak, Z. (2005). Sow and litter performance following farrowing induction with prostaglandin: Effect of adjunct treatments with dexamethasone or oxytocin. Journal of Swine Health and Production, 13(2), 81-85. Scopus24 |
| 2005 | Vadnais, M. L., Kirkwood, R. N., Specher, D. J., & Chou, K. (2005). Effects of extender, incubation temperature, and added seminal plasma on capacitation of cryopreserved, thawed boar sperm as determined by chlortetracycline staining. Animal Reproduction Science, 90(3-4), 347-354. Scopus50 Europe PMC34 |
| 2004 | Willenburg, K. L., Knox, R. V., & Kirkwood, R. N. (2004). Effect of estrogen formulation and its site of deposition on serum PGFM concentrations, uterine contractility, and time of ovulation in artificially inseminated weaned sows.. Animal Reproduction Science, 80(1-2), 147-156. Scopus12 Europe PMC8 |
| 2004 | Cassar, G., Kirkwood, R. N., Poljak, Z., & Friendship, R. (2004). Effect of estrogen formulation and site of deposition on fertility of artificially inseminated sows treated with human chorionic gonadotrophin to induce ovulation. Journal of Swine Health and Production, 12(6), 285-287. Scopus10 |
| 2004 | Pérez Laspiur, J., Burton, J. L., Weber, P. S. D., Kirkwood, R. N., & Trottier, N. L. (2004). Short Communication: Amino acid transporters in porcine mammary gland during lactation. Journal of Dairy Science, 87(10), 3235-3237. Scopus20 Europe PMC14 |
| 2004 | Gibson, S., Tempelman, R. J., & Kirkwood, R. N. (2004). Effect of oxytocin-supplemented semen on fertility of sows bred by intrauterine insemination. Journal of Swine Health and Production, 12(4), 182-185. Scopus4 |
| 2003 | Clowes, E. J., Kirkwood, R., Cegielski, A., & Aherne, F. X. (2003). Phase-feeding protein to gestating sows over three parities reduced nitrogen excretion without affecting sow performance. Livestock Production Science, 81(2-3), 235-246. Scopus14 |
| 2003 | De Rensis, F., Benedetti, S., Silva, P., & Kirkwood, R. N. (2003). Fertility of sows following artificial insemination at a gonadotrophin-induced estrus coincident with weaning. Animal Reproduction Science, 76(3-4), 245-250. Scopus23 Europe PMC13 |
| 2002 | Ten Haft, W., Thacker, P. A., & Kirkwood, R. N. (2002). Effect of injecting gonadotrophins during the luteal phase of the estrous cycle on the inter-estrus interval of gilts. Canadian Journal of Animal Science, 82(3), 457-459. Scopus4 |
| 2002 | De Rensis, F., Sottocorona, M., & Kirkwood, R. N. (2002). Effect of prostaglandin and dexamethasone injection on farrowing and piglet neonatal growth. Veterinary Record, 151(11), 330-331. Scopus11 Europe PMC2 |
| 2002 | Langendikjk, P., Bouwman, E. G., Kidson, A., Kirkwood, R. N., Soede, N. M., & Kemp, B. (2002). Role of myometrial activity in sperm transport through the genital tract and in fertilization in sows. Reproduction, 123(5), 683-690. Scopus41 Europe PMC28 |
| 2002 | Patterson, J. L., Willis, H. J., Kirkwood, R. N., & Foxcroft, G. R. (2002). Impact of boar exposure on puberty attainment and breeding outcomes in gilts. Theriogenology, 57(8), 2015-2025. Scopus42 Europe PMC29 |
| 2002 | Tarocco, C., & Kirkwood, R. (2002). Vaginal length is not related to subsequent litter size of gilts. Journal of Swine Health and Production, 10(3), 125-126. Scopus6 |
| 2001 | Li, B. T., Van Kessel, A. G., Caine, W. R., Huang, S. X., & Kirkwood, R. N. (2001). Small intestinal morphology and bacterial populations in ileal digesta and feces of newly weaned pigs receiving a high dietary level of zinc oxide. Canadian Journal of Animal Science, 81(4), 511-516. Scopus102 |
| 2001 | Patterson, J. L., Willis, H. J., Kirkwood, R. N., & Foxcroft, G. R. (2001). Lack of an effect of prostaglandin injection at estrus onset on the time of ovulation and on reproductive performance in weaned sows. Theriogenology, 56(5), 913-921. Scopus6 Europe PMC3 |
| 2001 | Soede, N. M., Raaphorst, C. J. M., Bouwman, E. G., & Kirkwood, R. N. (2001). Effects of injection of hCG during the estrous cycle on follicle development and the inter-estrous interval. Theriogenology, 55(4), 901-909. Scopus9 Europe PMC4 |
| 2001 | Hazeleger, W., Kirkwood, R. N., & Soede, N. M. (2001). Synchronisation of the reproductive cycle in pigs. Archiv Fur Tierzucht, 44(SUPPL. 1), 71-76. Scopus2 |
| 2001 | Tarocco, C., & Kirkwood, R. N. (2001). The effect of estrus duration and number of artificial inseminations on fertility of gilts and multiparous sows having a four-day wean-to-estrus interval. Journal of Swine Health and Production, 9(3), 117-120. Scopus2 |
| 2001 | Kirkwood, R. N., Rawluk, S. A., Cegielski, A. C., & Otto, A. J. (2001). Effect of pig age and autogenous sow vaccination on nasal mucosal colonization of pigs by Haemophilus parasuis. Journal of Swine Health and Production, 9(2), 77-79. Scopus17 |
| 2000 | Kirkwood, R. N., Aherne, F. X., Monaghan, P. G., & Misutka, S. C. (2000). Breeding gilts at natural or a hormone-induced estrus: Effects on performance over four parities. Journal of Swine Health and Production, 8(4), 177-179. Scopus12 |
| 2000 | Kirkwood, R. (2000). When to breed and when not to breed. Journal of Swine Health and Production, 8(4), 191. Scopus3 |
| 2000 | Tarocco, C., De Rensis, F., Kirkwood, R. N., & Yang, R. C. (2000). Effect of split-weaning interval on return to estrus and sow fertility. Journal of Swine Health and Production, 8(5), 221-223. Scopus5 |
| 2000 | Almeida, F. R. C. L., Kirkwood, R. N., Aherne, F. X., & Foxcroft, G. R. (2000). Consequences of different patterns of feed intake during the estrous cycle in gilts on subsequent fertility. Journal of Animal Science, 78(6), 1556-1563. Scopus57 Europe PMC39 |
| 1999 | Kirkwood, R. N. (1999). Pharmacological intervention in swine reproduction. Journal of Swine Health and Production, 7(1), 29-35. Scopus41 |
| 1999 | Yu, Z., Gordon, J. R., Kirkwood, R. N., & Thacker, P. A. (1999). Embryo Survival on Day 25 of Generation in the Gilt is Not Affected by Exogenous Progesterone but is Correlated with Levels of Insulin-Like Growth Factor-I (IGF-I) mRNA in the Uterus. Asian Australasian Journal of Animal Sciences, 12(6), 862-867. Scopus4 |
| 1999 | Kirkwood, R. N. (1999). Influence of postpartum cloprostenol injection on sow and litter performance. Journal of Swine Health and Production, 7(3), 121-122. Scopus8 |
| 1999 | Huang, S. X., McFall, M., Cegielski, A. C., & Kirkwood, R. N. (1999). Effect of dietary zinc supplementation on Escherichia coli septicemia in weaned pigs. Journal of Swine Health and Production, 7(3), 109-111. Scopus48 |
| 1999 | Kirkwood, R. N., Henry, S. C., Tokach, L. M., & Foxcroft, G. R. (1999). Human chorionic gonadotropin at parturition fails to consistently induce ovulation in sows. Journal of Swine Health and Production, 7(2), 69-71. Scopus7 |
| 1998 | Kirkwood, R. N., & Thacker, P. A. (1998). Induced estrus and breeding during lactation: Effects on sow and litter performance. Journal of Swine Health and Production, 6(3), 95-98. Scopus5 |
| 1998 | Kirkwood, R. N., & Aherne, F. X. (1998). Increasing the predictability of cloprostenol-induced farrowing in sows. Journal of Swine Health and Production, 6(2), 57-59. Scopus28 |
| 1998 | Kirkwood, R. N., & Aherne, F. X. (1998). The relationship between estrogen pretreatment and route of administration of cloprostenol on progesterone concentrations and farrowing in sows. Journal of Swine Health and Production, 6(5), 219-221. Scopus2 |
| 1998 | Kirkwood, R. N., Aherne, F. X., & Foxcroft, G. R. (1998). Effect of gonadotropin at weaning on reproductive performance of primiparous sows. Journal of Swine Health and Production, 6(2), 51-55. Scopus22 |
| 1998 | Kirkwood, R. N., Ormand, C. J., & Goonewardene, L. A. (1998). Injection of PG600® at weaning of the first litter: Effects on sow lifetime performance. Journal of Swine Health and Production, 6(6), 273-274. Scopus5 |
| 1997 | Yu, Z., Kirkwood, R. N., & Thacker, P. A. (1997). Effect of exogenous progesterone following mating on embryo survival in the gilt. Canadian Journal of Animal Science, 77(4), 731-733. Scopus6 |
| 1997 | Chandolia, R. K., Kirkwood, R. N., & Thacker, P. A. (1997). Effects of trilostane, an inhibitor of 3β-hydroxysteroid dehydrogenase, on the onset and duration of parturition in sows and gilts. Canadian Journal of Animal Science, 77(2), 331-333. |
| 1996 | Kirkwood, R. N., Thacker, P. A., Aherne, F. X., & Goonewardene, L. A. (1996). The effect of dose and route of administration of prostaglandin F2α on the parturient response of sows. Journal of Swine Health and Production, 4(3), 123-126. Scopus25 |
| 1995 | Kirkwood, R. N., Soede, N. M., Dyck, G. W., & Thacker, P. A. (1995). The effect of immunoneutralization of PMSG at a gonadotropin-induced oestrus on the duration of ovulation and reproductive performance of sows. Animal Science, 61(2), 321-324. Scopus7 |
| 1995 | Kirkwood, R. N., & Thacker, P. A. (1995). Effects of pre-partum oestradiol injection on parturition in sows and piglet survival. Animal Science, 60(3), 481-483. Scopus4 |
| 1995 | Kirkwood, R. N., & Thacker, P. A. (1995). Effect of propranolol on the onset and duration of parturition in sows. Canadian Veterinary Journal, 36(4), 238-239. Scopus10 Europe PMC5 |
| 1995 | Xu, Y., Kirkwood, R. N., Rajkumar, K., & Thacker, P. A. (1995). Effects of metabolic hormones and growth factors on forskolin and dibutyryl adenosine 3',5'-cyclic monophosphate induced steroidogenic responses by porcine granulosa cells in vitro. Canadian Journal of Animal Science, 75(1), 85-91. Scopus8 |
| 1994 | Kirkwood, R. N., Peacock, A. J., Van Lunen, T. A., & Thacker, P. A. (1994). The effect of immunoneutralization of PMSG near a gonadotropin-induced oestrus on the reproductive performance of gilts. Animal Production, 58(3), 401-404. Scopus3 |
| 1994 | Peacock, A. J., Kirkwood, R. N., & Thacker, P. A. (1994). A note on the influence of added relaxin on the fertility of aged boar semen. Animal Production, 58(3), 419-421. Scopus1 |
| 1992 | Kirkwood, R. N., & Thacker, P. A. (1992). Management of replacement breeding animals.. Veterinary Clinics of North America Food Animal Practice, 8(3), 575-587. Scopus11 Europe PMC6 |
| 1992 | Rajkumar, K., Kerr, D. E., Kirkwood, R. N., & Laarveld, B. (1992). Inhibitory action of somatostatin-14 on hormone-stimulated cyclic adenosine monophosphate induction in porcine granulosa and luteal cells. Journal of Endocrinology, 134(2), 297-306. Scopus18 Europe PMC9 |
| 1992 | Kerr, D. E., & Kirkwood, R. N. (1992). The effect of exogenous insulin-like growth factor-I (IGF-I) on the reproductive performance of female rats, and on serum concentrations of endogenous IGF-I and IGF-I binding proteins. Domestic Animal Endocrinology, 9(2), 151-159. Scopus2 |
| 1991 | Beltranena, E., Aherne, F. X., Foxcroft, G. R., & Kirkwood, R. N. (1991). Effects of pre- and postpubertal feeding on production traits at first and second estrus in gilts.. Journal of Animal Science, 69(3), 886-893. Scopus46 Europe PMC28 |
| 1991 | Kirkwood, R. N., Thacker, P. A., & Chaplin, R. K. (1991). The influence of exogenous gonadotrophins and cloprostenol on ovulation in gilts. Canadian Veterinary Journal, 32(12), 742-746. Scopus4 |
| 1990 | Kirkwood, R. N., Korchinski, R. S., Thacker, P. A., & Laarveld, B. (1990). Observations on the influence of active immunization against somatostatin on the reproductive performance of sheep and pigs. Journal of Reproductive Immunology, 17(3), 229-238. Scopus8 Europe PMC3 |
| 1989 | Kirkwood, R. N., & Thacker, P. A. (1989). The influence of a premating injection of gonadotrophin-releasing hormone on sow and gilt fertility. Canadian Veterinary Journal, 30(12), 959-960. Scopus1 |
| 1989 | Kirkwood, R. N., Thacker, P. A., & Laarveld, B. (1989). The influence of growth hormone injections on the endocrine and metabolic status of gilts. Domestic Animal Endocrinology, 6(2), 167-176. Scopus14 Europe PMC5 |
| 1988 | Kirkwood, R. N., & Aherne, F. X. (1988). The influence of feeding Allyl Trenbolone during late lactation on the reproductive performance of primiparous and multiparous sows. Canadian Veterinary Journal, 29(1), 68-71. Scopus1 |
| 1988 | Kirkwood, R. N., Mitaru, B. N., Gooneratne, A. D., Blair, R., & Thacker, P. A. (1988). The influence of premating feed intake on the reproductive performance of gilts.. Canadian Journal of Veterinary Research Revue Canadienne De Recherche Veterinaire, 52(1), 134-136. Scopus2 Europe PMC2 |
| 1988 | Kirkwood, R. N., Thacker, P. A., Korchinski, R. S., & Laarveld, B. (1988). The influence of exogenous pituitary growth hormone on the ovulatory response to PMSG and hCG and the LH response to estradiol benzoate in prepubertal gilts. Domestic Animal Endocrinology, 5(4), 317-322. Scopus7 Europe PMC5 |
| 1987 | KIRKWOOD, R. N., BAIDOO, S. K., AHERNE, F. X., & SATHER, A. P. (1987). THE INFLUENCE OF FEEDING LEVEL DURING LACTATION ON THE OCCURRENCE AND ENDOCRINOLOGY OF THE POSTWEANING ESTRUS IN SOWS. Canadian Journal of Animal Science, 67(2), 405-415. |
| 1987 | Kirkwood, R. N., Cumming, D. C., & Aherne, F. X. (1987). Nutrition and puberty in the female.. Proceedings of the Nutrition Society, 46(2), 177-192. Scopus22 Europe PMC18 |
| 1986 | Kirkwood, R. N., Smith, W. C., & Lapwood, K. R. (1986). Influence of oral administration of allyl trenbolone on subsequent litter size of primiparous sows. New Zealand Journal of Experimental Agriculture, 14(4), 477-480. Scopus12 |
| 1985 | Kirkwood, R. N., & Aherne, F. X. (1985). Energy intake, body composition and reproductive performance of the gilt.. Journal of Animal Science, 60(6), 1518-1529. Scopus61 Europe PMC26 |
| 1985 | Aherne, F. X., & Kirkwood, R. N. (1985). Nutrition and sow prolificacy.. Journal of Reproduction and Fertility Supplement, 33, 169-183. Scopus99 Europe PMC27 |
| 1985 | Kirkwood, R. N., Moller, K., Smith, W. C., Lapwood, K. R., & Garrick, D. J. (1985). The influence of allyl trenbolone (Regumate) on the timing, duration and endocrinology of parturition in sows. Animal Reproduction Science, 9(2), 163-171. Scopus14 |
| 1984 | Kirkwood, R. N., Lapwood, K. R., Smith, W. C., & Anderson, I. L. (1984). Plasma concentrations of LH, prolactin, oestradiol-17β and progesterone in sows weaned after lactation for 10 or 35 days. Journal of Reproduction and Fertility, 70(1), 95-102. Scopus48 Europe PMC30 |
| 1984 | Kirkwood, R. N., Lapwood, K. R., Smith, W. C., Moller, K., & Garrick, D. J. (1984). Effects of oestradiol benzoate treatment on the reproductive performance and endocrine status of sows after lactations of 10 or 35 days. Journal of Reproduction and Fertility, 72(2), 329-337. Scopus10 |
| 1983 | Kirkwood, R. N., & Smith, W. C. (1983). Effect of partial weaning of piglets on lactational oestrus and sow and piglet body weight changes. New Zealand Journal of Experimental Agriculture, 11(3), 231-233. Scopus8 |
| 1983 | Kirkwood, R. N., Hughes, P. E., & Booth, W. D. (1983). The influence of boar-related odours on puberty attainment in gilts. Animal Production, 36(1), 131-136. Scopus29 |
| 1981 | Kirkwood, R. N., Hughes, P. E., & Rodway, R. G. (1981). Bromocryptine treatment and puberty attainment in the female rat. Experientia, 37(10), 1114. Scopus1 Europe PMC1 |
| 1981 | Kirkwood, R. N., Forbes, J. M., & Hughes, P. E. (1981). Influence of boar contact on attainment of puberty in gilts after removal of the olfactory bulbs. Journal of Reproduction and Fertility, 61(1), 193-196. Scopus49 Europe PMC13 |
| 1981 | Kirkwood, R. N., & Hughes, P. E. (1981). A note on the influence of boar age on its ability to advance puberty in the gilt. Animal Production, 32(2), 211-213. Scopus21 |
| 1980 | Kirkwood, R. N., & Hughes, P. E. (1980). A note on the efficacy of continuous v. limited boar exposure on puberty attainment in the gilt. Animal Production, 31(2), 205-207. Scopus14 |
| 1980 | Kirkwood, R. N., & Hughes, P. E. (1980). A note on the influence of ‘boar effect’ component stimuli on puberty attainment in the gilt. Animal Production, 31(2), 209-211. Scopus12 |
| 1979 | Kirkwood, R. N., & Hughes, P. E. (1979). The influence of age at first boar contact on puberty attainment in the gilt. Animal Production, 29(2), 231-238. Scopus34 |
| - | Teixeira Rodrigues de Almeida, S., Caetano, M., Kirkwood, R. N., & Petrovski, K. R. (2025). The Basics of Clinical Nutrition for Compromised Ruminants—A Narrative Review. Ruminants, 5(4), 51. |
| - | Petrovski, K. R., Kirkwood, R. N., Teixeira Rodrigues de Almeida, S., & Caetano, M. (2025). A Proposed Framework for Nutritional Assessment in Compromised Ruminants. Ruminants, 5(4), 57. |
| - | Petrovski, K. R., & Kirkwood, R. N. (2025). Clinical Reasoning Uncertainty in Veterinary Medical Encounters with a Clinical Example. Veterinary Sciences, 12(12), 1203. |
| Year | Citation |
|---|---|
| 2018 | Macedo, C., Escobar, C., Crespo-Felez, I., Manjarin, R., Kirkwood, R. N., de Tejerina, J. C. D., . . . Martinez-Pastor, F. (2018). Effect of Melatonin Implants on Semen Quality of Assaf Rams during Long-Day Photoperiod.. In JOURNAL OF ANIMAL SCIENCE Vol. 96 (pp. 256). OXFORD UNIV PRESS INC. WoS1 |
| 2016 | Seyfang, J., Chen, T., Langendijk, P., & Kirkwood, R. (2016). hCG in early pregnancy increases estrogen and pregnancy rate in sows. In 18th International congress on Animal Reproduction. Tours, France. |
| Year | Citation |
|---|---|
| 2017 | Brown, T., Ngula, J., Alegre, B., Hernandez, G., Kirkwood, R. N., Manjarin, R., & de Tejerina, J. C. D. (2017). Influence of seminal additives on sow fertility.. Poster session presented at the meeting of JOURNAL OF ANIMAL SCIENCE. AMER SOC ANIMAL SCIENCE. DOI |
| 2017 | Montano, Y. A., Manjarin, R., Petrovski, K., & Kirkwood, R. N. (2017). Piglet creching decreases protein content in colostrum.. Poster session presented at the meeting of JOURNAL OF ANIMAL SCIENCE. AMER SOC ANIMAL SCIENCE. DOI |
| 2014 | Hidalgo, D. M., Cassar, G., Manjarin, R., Dominguez, J. C., Friendship, R. M., Bobis, D., & Kirkwood, R. N. (2014). Relationship between vaginal mucus conductivity and time of ovulation in weaned sows. Poster session presented at the meeting of REPRODUCTION IN DOMESTIC ANIMALS. Alicante, SPAIN: WILEY-BLACKWELL. WoS1 |
| 2013 | Flowers, W. L., Stewart., Gall., Novak., Dyck., & Kirkwood. (2013). Boar seminal plasma proteins and their relevance to reproductive technologies. Poster session presented at the meeting of Control of Pig Reproduction IX. |
| Year | Citation |
|---|---|
| 2025 | Uddin, A. H. M. M., Taechamaeteekul, P., Petrovski, K., Tummaruk, P., Song, Y., Garg, S., & Kirkwood, R. (2025). Development of Timed Release Vaginal Mucosal Cloprostenol for Farrowing Management in Sows. DOI |
| 2024 | Petrovski, K., & Kirkwood, R. N. (2024). Common Biases, Difficulties, and Errors in Clinical Reasoning in Veterinary Medical Encounters with a Case Example. DOI |
| Date | Role | Research Topic | Program | Degree Type | Student Load | Student Name |
|---|---|---|---|---|---|---|
| 2025 | Co-Supervisor | Precision monitoring of swine reproductive state via development of mucus testing and remote monitoring for timed artificial insemination. | Doctor of Philosophy | Doctorate | Full Time | Miss Sarah Elizabeth James |
| 2025 | Co-Supervisor | Effects of colostrum management on productivity and fertility in pigs | Doctor of Philosophy | Doctorate | Full Time | Miss Ao Zhang |
| 2025 | Co-Supervisor | The effect of sow nutritional management on piglet enteric health | Doctor of Philosophy | Doctorate | Full Time | Ms Kexin Zhang |
| 2025 | Co-Supervisor | Precision monitoring of swine reproductive state via development of mucus testing and remote monitoring for timed artificial insemination. | Doctor of Philosophy | Doctorate | Full Time | Miss Sarah Elizabeth James |
| 2025 | Co-Supervisor | The effect of sow nutritional management on piglet enteric health | Doctor of Philosophy | Doctorate | Full Time | Ms Kexin Zhang |
| 2025 | Co-Supervisor | Effects of colostrum management on productivity and fertility in pigs | Doctor of Philosophy | Doctorate | Full Time | Miss Ao Zhang |
| 2024 | Co-Supervisor | Evaluating the maternal supplementation of bromoform to twin-bearing Merino ewes and their progeny | Doctor of Philosophy | Doctorate | Full Time | Miss Tianna Rianne Boyce |
| 2024 | Co-Supervisor | Effects of maternal nutrition on piglet's survival, growth and performance | Doctor of Philosophy | Doctorate | Full Time | Mr Thien Dinh Van |
| 2024 | Co-Supervisor | Evaluating the maternal supplementation of bromoform to twin-bearing Merino ewes and their progeny | Doctor of Philosophy | Doctorate | Full Time | Miss Tianna Rianne Boyce |
| 2024 | Co-Supervisor | Effects of maternal nutrition on piglet's survival, growth and performance | Doctor of Philosophy | Doctorate | Full Time | Mr Thien Dinh Van |
| 2022 | Principal Supervisor | Non-injection administration of GnRH for control of ovarian function | Doctor of Philosophy | Doctorate | Full Time | Mr A H M Musleh Uddin |
| 2022 | Principal Supervisor | Non-injection administration of GnRH for control of ovarian function | Doctor of Philosophy | Doctorate | Full Time | Mr A H M Musleh Uddin |
| Date | Role | Research Topic | Program | Degree Type | Student Load | Student Name |
|---|---|---|---|---|---|---|
| 2018 - 2022 | Principal Supervisor | Management of sows and their piglets around the periparturient period: observing the effects on survival and performance of the litter | Doctor of Philosophy | Doctorate | Full Time | Miss Sophia Alexandra Ward |
| 2018 - 2021 | Principal Supervisor | Development and Manipulation of the Piglet Intestinal Microbiota | Doctor of Philosophy | Doctorate | Full Time | Ms Tanya Louise Nowland |
| 2018 - 2022 | Principal Supervisor | Identifying and managing low viable piglets for improved survival | Doctor of Philosophy | Doctorate | Full Time | Dr Bryony Tucker |
| 2016 - 2020 | Co-Supervisor | Evaluation of pH Neutral Electrochemically Activated Solution (ECAS): As a Sanitiser for Livestock Husbandry and Food Safety Applications | Doctor of Philosophy | Doctorate | Full Time | Mr Sangay Tenzin |
| 2016 - 2023 | Co-Supervisor | Antimicrobial resistant bacteria - Escherichia coli, Klebsiella pneumoniae carriage and transmission in avian species | Doctor of Philosophy | Doctorate | Full Time | Mrs Shewli Mukerji |
| 2015 - 2018 | Co-Supervisor | Birth Litter Sex Ratio Affects Gilt Behaviour, Endocrine Status and Reproductive Performance | Doctor of Philosophy | Doctorate | Full Time | Mrs Jemma Savaglia |
| 2014 - 2017 | Co-Supervisor | Feeding Value of Sweet Potato and Cassava to Growing Pigs | Doctor of Philosophy | Doctorate | Full Time | Mr Michael Theophilus Dom |
| 2012 - 2016 | Co-Supervisor | The epidemiology of pig diseases and the emergence of porcine circovirus type 2 in Papua Province, Indonesia | Doctor of Philosophy | Doctorate | Full Time | Mr Widi Nugroho |
| 2011 - 2016 | Co-Supervisor | The induction of a fertile oestrus in lactating sows and the subsequent effect mating in lactation has on oocyte quality and embryo survival | Doctor of Philosophy | Doctorate | Full Time | Miss Alice Caroline Weaver |
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