Dr Roy Kirkwood
Associate Professor
School of Animal and Veterinary Science
Faculty of Sciences, Engineering and Technology
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.
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Appointments
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 -
Education
Date Institution name Country Title University College of North Wales United Kingdom BSc University of Leeds United Kingdom PhD University of Saskatchewan Canada DVM -
Certifications
Date Title Institution name Country — Diplomate European College of Animal Reproduction - -
Research Interests
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Journals
Year Citation 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.
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, 1485312.
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), 1-8.
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), 14 pages.
Scopus12024 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.
Scopus32024 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.
Europe PMC22024 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), e14500.
Scopus7 Europe PMC32024 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.
Scopus2 WoS1 Europe PMC12024 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, 14(3), 6 pages.
Scopus22024 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.
Scopus4 Europe PMC22023 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.
Scopus2 WoS1 Europe PMC22023 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.
Scopus7 WoS2 Europe PMC72023 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, 46(1), 5-16.
Scopus22023 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.
Scopus12023 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, 7 pages.
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), 14 pages.
Scopus7 Europe PMC52023 Tummaruk, P., De Rensis, F., & Kirkwood, R. N. (2023). Managing prolific sows in tropical environments.. Molecular reproduction and development, 90(7), 533-545.
Scopus21 WoS7 Europe PMC102023 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.
Scopus1 Europe PMC12022 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.
Scopus8 WoS2 Europe PMC42022 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.
Scopus22 WoS9 Europe PMC82022 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.
Scopus6 WoS2 Europe PMC22022 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.
Scopus5 WoS3 Europe PMC12022 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.
Scopus4 WoS1 Europe PMC22022 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 WoS3 Europe PMC32022 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.
Scopus7 WoS3 Europe PMC42022 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.
Scopus4 Europe PMC12022 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.
Scopus1 WoS12021 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.
Scopus6 WoS4 Europe PMC52021 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.
Scopus5 WoS2 Europe PMC12021 Sankarganesh, D., Kirkwood, R., Angayarkanni, J., Achiraman, S., & Archunan, G. (2021). Pig pheromones and behaviors: A review. Theriogenology, 175, 1-6.
Scopus102021 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.
Scopus12 WoS52021 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.
Scopus20 WoS13 Europe PMC112021 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.
Scopus32 WoS8 Europe PMC152021 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 WoS1 Europe PMC12021 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.
Scopus5 Europe PMC32021 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.
Scopus5 WoS2 Europe PMC42021 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 WoS3 Europe PMC32021 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.
Scopus6 WoS3 Europe PMC42021 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.
Scopus11 WoS4 Europe PMC52020 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.
Scopus56 WoS31 Europe PMC322020 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.
Scopus1 WoS12020 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), 13 pages.
Scopus4 WoS5 Europe PMC42020 Nowland, T. L., & Kirkwood, R. N. (2020). Faecal microbiota transplantation: Is it the future for pig production?. Microbiology Australia, 41(2), 91-94.
Scopus1 WoS12020 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.
Scopus4 WoS42020 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.
Scopus7 WoS4 Europe PMC52020 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.
Scopus9 WoS6 Europe PMC42019 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.
Scopus71 WoS54 Europe PMC562019 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 WoS32019 Ward, S. A., Kirkwood, R. N., & Plush, K. L. (2019). Effects of oxytocin and carbetocin on farrowing performance. Animal Reproduction Science, 205, 88-93.
Scopus15 WoS14 Europe PMC112019 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 WoS1 Europe PMC12019 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 PMC32019 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.
Scopus8 WoS5 Europe PMC52019 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.
Scopus42018 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.
Scopus9 WoS82018 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 PMC22018 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 WoS32018 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.
Scopus52 WoS42 Europe PMC312018 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.
Scopus3 WoS22018 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 WoS7 Europe PMC32018 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.
Scopus6 WoS2 Europe PMC12017 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 WoS32017 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.
Scopus2 WoS12017 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.
Scopus50 WoS35 Europe PMC272017 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.
Scopus2 WoS2 Europe PMC22017 De Rensis, F., Ziecik, A., & Kirkwood, R. (2017). Seasonal infertility in gilts and sows: Aetiology, clinical implications and treatments. Theriogenology, 96, 111-117.
Scopus38 WoS29 Europe PMC182017 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 WoS5 Europe PMC32017 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 WoS22016 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 WoS4 Europe PMC42016 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 PMC22016 De Rensis, F., & Kirkwood, R. (2016). Control of estrus and ovulation: fertility to timed insemination of gilts and sows. Theriogenology, 86(6), 1460-1466.
Scopus55 WoS42 Europe PMC232016 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 WoS7 Europe PMC32016 Kirkwood, R., & De Rensis, F. (2016). Control of estrus in gilts and primiparous sows. Thai Journal of Veterinary Medicine, 46(1), 1-7.
Scopus5 WoS32016 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 PMC22015 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.
Scopus12 WoS102015 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.
Scopus4 WoS2 Europe PMC12015 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 WoS42015 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 WoS1 Europe PMC32015 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.
Scopus5 WoS22015 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.
Scopus5 WoS5 Europe PMC12015 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.
Scopus25 WoS23 Europe PMC122014 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.
Scopus6 WoS4 Europe PMC32014 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.
Scopus7 WoS7 Europe PMC32014 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.
Scopus12014 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 PMC12013 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.
Scopus20 Europe PMC152013 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 WoS142013 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 PMC22013 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 WoS12013 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.
Scopus18 Europe PMC82012 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.
Scopus58 WoS52 Europe PMC492012 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.
Scopus50 WoS38 Europe PMC182012 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.
Scopus17 Europe PMC92012 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.
Scopus37 Europe PMC302011 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 WoS72011 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.
Scopus48 Europe PMC362011 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.
Scopus115 Europe PMC522011 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.
Scopus222011 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.
Scopus22 Europe PMC162011 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 PMC62010 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 PMC12010 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.
Scopus63 Europe PMC272010 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.
Scopus92010 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.
Scopus14 Europe PMC62010 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.
Scopus162010 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.
Scopus62010 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.
Scopus12 Europe PMC32009 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.
Scopus6 Europe PMC42009 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.
Scopus5 Europe PMC22009 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 PMC112009 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.
Scopus35 Europe PMC212009 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.
Scopus22 Europe PMC172008 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 PMC22008 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.
Scopus162008 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.
Scopus12 Europe PMC52008 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.
Scopus112008 Kirkwood, R., Vadnais, M., & Abad, M. (2008). Practical application of seminal plasma. Theriogenology, 70(8), 1364-1367.
Scopus20 Europe PMC82007 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 PMC12007 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.
Scopus322007 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 PMC72007 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.
Scopus122007 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.
Scopus30 Europe PMC132007 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 PMC142006 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 PMC82005 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.
Scopus59 Europe PMC332005 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.
Scopus402005 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 PMC192005 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.
Scopus222005 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.
Scopus49 Europe PMC282004 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.
Scopus11 Europe PMC62004 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.
Scopus102004 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 PMC132004 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.
Scopus42003 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.
Scopus122003 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.
Scopus21 Europe PMC112002 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.
Scopus42002 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 PMC12002 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.
Scopus40 Europe PMC252002 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.
Scopus41 Europe PMC272002 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.
Scopus62001 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.
Scopus1002001 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 PMC22001 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 PMC42001 Hazeleger, W., Kirkwood, R. N., & Soede, N. M. (2001). Synchronisation of the reproductive cycle in pigs. Archiv fur Tierzucht, 44(SUPPL. 1), 71-76.
Scopus22001 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.
Scopus22001 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.
Scopus172000 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.
Scopus122000 Kirkwood, R. (2000). When to breed and when not to breed. Journal of Swine Health and Production, 8(4), 191.
Scopus32000 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.
Scopus42000 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.
Scopus56 Europe PMC391999 Kirkwood, R. N. (1999). Pharmacological intervention in swine reproduction. Journal of Swine Health and Production, 7(1), 29-35.
Scopus391999 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.
Scopus41999 Kirkwood, R. N. (1999). Influence of postpartum cloprostenol injection on sow and litter performance. Journal of Swine Health and Production, 7(3), 121-122.
Scopus81999 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.
Scopus481999 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.
Scopus61998 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.
Scopus51998 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.
Scopus271998 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.
Scopus21998 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.
Scopus221998 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.
Scopus51997 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.
Scopus61997 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 F<inf>2α</inf> on the parturient response of sows. Journal of Swine Health and Production, 4(3), 123-126.
Scopus241995 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.
Scopus71995 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.
Scopus41995 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 PMC31995 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.
Scopus81994 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.
Scopus31994 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.
Scopus11992 Kirkwood, R. N., & Thacker, P. A. (1992). Management of replacement breeding animals.. The Veterinary clinics of North America. Food animal practice, 8(3), 575-587.
Scopus11 Europe PMC71992 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 PMC71992 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.
Scopus21991 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 PMC251991 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.
Scopus41990 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 PMC21989 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.
Scopus11989 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 PMC51988 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.
Scopus11988 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 vétérinaire, 52(1), 134-136.
Scopus2 Europe PMC21988 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 PMC41987 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.. The Proceedings of the Nutrition Society, 46(2), 177-192.
Scopus22 Europe PMC111986 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.
Scopus121985 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 PMC231985 Aherne, F. X., & Kirkwood, R. N. (1985). Nutrition and sow prolificacy.. Journal of reproduction and fertility. Supplement, 33, 169-183.
Scopus97 Europe PMC251985 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.
Scopus141984 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.
Scopus46 Europe PMC261984 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.
Scopus101983 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.
Scopus81983 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.
Scopus291981 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 PMC11981 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.
Scopus48 Europe PMC91981 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.
Scopus211980 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.
Scopus141980 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.
Scopus121979 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- Carr, A. N. M., Kirkwood, R. N., & Petrovski, K. R. (n.d.). Use of Effective Feedback in Veterinary Clinical Teaching. Encyclopedia, 3(3), 928-946.
- Carr, A. M. N., Ferlini Agne, G., Kirkwood, R. N., & Petrovski, K. R. (n.d.). Teaching Clinical Reasoning to Veterinary Medical Learners with a Case Example. Encyclopedia, 4(2), 753-775.
- Carr, A. N. M., Kirkwood, R. N., & Petrovski, K. R. (n.d.). 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.
- Petrovski, K. R., & Kirkwood, R. N. (n.d.). Common Biases, Difficulties, and Errors in Clinical Reasoning in Veterinary Medical Encounters with a Case Example. Encyclopedia, 5(1), 14.
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Books
Year Citation 2018 Carr, J., Chen, S. -P., Connor, J. F., Kirkwood, R., & Segalés, J. (2018). Pig Health. Boca Raton, FL; USA: CRC Press. 2017 Thacker, P. A., & Kirkwood, R. N. (2017). Nontraditional feed sources for use in swine production. CRC Press.
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Book Chapters
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Conference Papers
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.
WoS12016 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. -
Conference Items
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.
DOI2017 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.
DOI2014 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.
WoS12013 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. -
Preprint
Year Citation 2024 Petrovski, K., & Kirkwood, R. N. (2024). Common Biases, Difficulties, and Errors in Clinical Reasoning in Veterinary Medical Encounters with a Case Example.
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Current Higher Degree by Research Supervision (University of Adelaide)
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 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 -
Past Higher Degree by Research Supervision (University of Adelaide)
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 Ms 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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