G.D.R.K.Perera

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Dr. G.D.R.K.Perera

BVSc(Peradeniya),M.Phil(Peradeniya), Ph.D (Advance Reproductive Biotechnologies)
Head/Senior Lecturer in Farm Animal Medicine, Surgery and Reproduction
Fellow of Sri Lanka Collage for Veterinary Surgeons
Address:

Department of Veterinary Farm Animal Production and Health ,
Faculty of Veterinary Medicine & Animal Science,
University of Peradeniya,
Peradeniya,20400

Contact:

Phone:+94812395933/ +94 714 787258 / +94 767 787258
Email:dammikaperera183@gmail.com /damperera@pdn.ac.lk
gdrkperera@vet.pdn.ac.lk

  • Scholarship for an internship training under “ERASMUS+ MOBILITY FOR STUDIES KA171 - Outside the EU - 2023/24“ program at university of Padua, Italy (2024). It was awarded for the best two postgraduate studies who registered at faculty of veterinary medicine and animal science, university of Peradeniya and received the first placement.
  • Excellence in reviewing (recognition of outstanding reviewing) award- Journal of Exploratory Medical and Animal Research (2023)
  • ‘The eminent veterinarian’ award- by SAARC Regional Veterinary Association (2023)
  • Dr. Arunasiri Iddamalgoda award for the best poster (Research) Presentation at 74th scientific sessions of the Sri Lanka Veterinary Association -(2022)
  • Dr. Arunasiri Iddamalgoda award for the best poster (Clinical) Presentation at 72th scientific sessions of the Sri Lanka Veterinary Association -(2020)
  • National Research Council (NRC) merit award for international research publications - (2017).
  • National Research Council (NRC) merit award for international research publications - (2015).
  • Perumal Pillai award for the best paper in 60th volume of Sri Lanka Veterinary Journal- (2013).
  • Dr.Hector C. Perera Memorial award for the best paper in clinical communication at 64th scientific sessions of the Sri Lanka Veterinary Association -(2012).
  • Air Commodore Dr. R.M.P.A. Dassanayake award for the best presentation in the animal production and wildlife session at 60thscientific sessions of the Sri Lanka Veterinary Association (2009).
  • Dr. & Mrs. Mohomad Award for the best presentation in animal health session at 60thscientific sessions of the Sri Lanka Veterinary Association-(2009).
  • Award for the best presentation in the reproduction session at 59thscientific sessions of the Sri Lanka Veterinary Association-(2008).
  • Award for the best research presentation at 59th scientific sessions of the Sri Lanka Veterinary Association-(2007).
  • Best national research-(animal reproduction) 2nd runner up at National livestock award ceremony in 2007(conducted by ministry of Agriculture and livestock).
  • Establishment of embryo production and transfer technology, embryo splitting technology with demi embryo transfer technology and live embryo freezing technology in Sri Lanka.

PATENTS

  • Protective anti-kicking belt for farm angulates (in progress)
  • guided surgical suture training block (in progress)

  • Farm animal Medicine, Surgery and Reproduction ,Clinical Teaching

    • Applications of Advance reproductive biotechnologies. (Ovum pick up, In vitro and in vivo fertilization, Superovulation, Embryo Transfer, Embryo Splitting, Demi embryo Transfer and Embryo Freezing, Intracytoplasmic sperm injection, Animal Cloning, Different techniques of Semen preservation and artificial inseminations)
    • Cell culture technologies and application of those technologies for conservation of genetics.
    • Effects of Heavy metals and trace elements in drinking water for unknown Etiological Chronic Kidney disease in Sri Lanka.
    • Alternative medicines for different pathological conditions in livestock species.
    • Backyard poultry in Sri Lanka.

    Year Awarding Body Project title and value Position
    2024-2026 Beijing Natural Science Foundation (International Scientists Project) " Preparation and application of cost-effective functionalized coconut char nanosorbent for removing DOM of groundwater in CKDu-endemic areas of Sri Lanka." Co- grantee/ Co- investigator
    2022 Multidisciplinary Research Grant-University Research Council. "Nanoadsorbent coated clay pot for domestic water treatment applications; Remediation of algal toxins and E.coli contaminations" Co-grantee/ Co-investigator
    2024-2025 IAEA Research Project "Enhancing buffalo productivity through assisted reproductive technologies, genetics, molecular, and nutritional analysis, and forage conservation with nuclear- derived technologies" Collaborator
    2024-2025 National Institute Fundamental Studies, Sri Lanka " Assessment of drinking water quality towards the identification of causative factors for chronic kidney disease of unknown etiology (CKDu)" Collaborator
    2021-2024 National Research Council "Effects of environmental fluoride, hardness, and heavy metal (Cd, Pb, As) exposures to the cow milk and their kidney function in CKDu endemic areas of Sri Lanka" Principal investigator, (Main Postgraduate Supervisor)
    2019-2020 University of Peradeniya “Validation of fix time techniques for Conventional Artificial Insemination (CAI) and Trans Abdominal Laparoscopic Artificial Insemination (TALAI) in sheep, under Sri Lankan condition.” Chief Grantee
    2018-2021 World Bank, AHEAD/ ICE Project “Innovation Commercialization Enhancement Grant of Faculty of Veterinary Medicine and Animal Science, University of Peradeniya. ” , Collaborator
    2018-2020 IAEA “Improving Livelihoods Through Dairy Cattle Production: Women Farmers’ Empowerment; ” , Collaborator
    2019 One Health Poultry Hub; GCRF UK. “Global Challenges Research- Poultry ” , Researcher

    • W. P. P. S. I. Perera, P. G. A. Pushpakumara, P. A. B. D. Alexander and G. D. R. K. Perera*, Influence of Exogenous GnRH, Insemination Volume, and Technique on Reproductive Performance of Saanen Goats in Sri Lanka, Ceylon Journal of Science 55 (1) 2026: 49-54 DOI:
    • H.M.S. Wasanaa, G.D.R.K. Perera, I.A.M.P. Ileperuma, H.T.K. Abeysundara, L. Jayarathne, R.S. Boteju, Z. Hao, Y.S. Wei, (2026) Linking groundwater chemistry to bovine kidney damage: A one health perspective on fluoride DOM-hard water interactions in CKDu-hotspots. Journal of Environmental Management. 404 (2026) 129580,
    • Dammika Rohan Kumara Perera*, Devinda Rathnakumara, Keshan Jayawardana, Eranga de. Seram, Anil Pushpakumara & Basil Alexander (2025). Response to GnRH Administration at Artificial Insemination in Crossbred Temperate Dairy Cattle Super-ovulated for Embryo Transfer Program under a Tropical Environment.Vietnam Journal of Agricultural Sciences; 8(2): 2452-2463 3
    • Perera GDRK, Pushpakumara PGA, Alexander PABD (2024) Validation of Hand Grading Technique of Corpora Lutea in Embryo Recipient Cows. Journal of Tropical Life Science 14 (2): 285 – 294. doi: 10.11594/jtls.14.02.09. 20410140
    • Perera GDRK, Pushpakumara PGA, Alexander PABD. Production, cryopreservation, and transfer of Murrah embryos through multiple ovulation and embryo transfer (MOET) technology in Sri Lanka. Explor Anim Med Res. (2024); 14(1), DOI: 10.52635/eamr/14.1.87-96.
    • Perera GDRK, Kaluarachchi NP, Vidura GM, Jayawardana YK, Madushan RAS, Ariyaratne HS (2023) Surgical management of fibroleiomyoma around the posterior rectum of a Friesian heifer. Explor Anim Med Res 13(1): 127-130. DOI: 10.52635/eamr/13.1.127-130.
    • Perera GDRK, Nilaweera PKW (2022) Non-conventional remedial approach to intraocular nematodiasis in horses under the field conditions: three case studies. Explor Anim Med Res 12(2): 299-303. DOI: 10.52635/eamr/12.2.299-303.
    • G.D.R.K.Perera* and Y.K. Jayawardana, Carpectomy and Partial Arthrodesis as a Surgical Intervention for Unilateral Congenital Flexion of Carpal Joint in a Crossbred Heifer Calf; a Case Study, Journal of Exploratory Animal and Medical Research, 251-254(2021).
    • H.M.S Wasana, G. D. R. K Perera, P. S.De Gunawardena, P. S. Fernando and J.Bandara. WHO water quality standards Vs Synergic effect(s) of fluoride, heavy metals and hardness in drinking water on kidney tissues Nature - Scientific Reports.1-6,(Nature publisher’s journal) (2017)
    • Wasana, H.M.S, Perera, G. D. R. K, Gunawardena, P. S, Bandara J. The impact of aluminum, fluoride, and aluminum–fluoride complexes in drinking water on chronic kidney disease." Environmental Science and Pollution Research: Vol 22, Iss 14, pp 11001-11009. DOI 10.1007/s11356-015-4324-y, (2015). https://www.ncbi.nlm.nih.gov/pubmed/25787218. http://link.springer.com/article/10.1007%2Fs11356-015-4324-y
      • https://www.livivo.de/doc/C952458656/the-impact-of-aluminum-fluoride-and-aluminum-fluoride-complexes-in-drinking-water-on-chronic-kidney-disease
    • Perera G.D.R.K, Pushpakumara P.G. A, Silva L.N.A.de, Basil Alexander. Production of genetically superior goats through embryo transfer technology in Sri Lanka. In; K.S. Hemachandra (ed), Tropical agricultural research, Post Graduate Institute of Agriculture, University of Peradeniya, Sri Lanka. Vol 20, pp 177-184. (2008). http://www.pgia.ac.lk/files/Annual_congress/journel/v20/18_Perera.pdf http://www.pgia.ac.lk/content/tropical-agricultura... www.cabdirect.org/abstracts/20103173670.html?start=200
    • Perera G.D.R.K, Pushpakumara P.G. A, Silva L.N.A.de and Basil Alexander. Establishment of embryo freezing and transfer technology for goats in Sri Lanka, Sri Lanka Veterinary Journal, vol 60(i)13-17pp.(2013)

      • Pear reviewed (full papers)

    • Perera, G.D.R.K. and Alexander,PA.B.D. (2024). Establishment of embryo splitting and demi-embryo transfer technology for goats in Sri Lanka: A preliminary study.Sri Lanka Journal of Multidisciplinary Research, 2 (1), 24-36

      • Conference full papers

    • Ruwani Liyanage, Lakmini, Waduarachchi, Itan Perera, Oshini Perera, Nishntha Wijesuriya, Dammika Perera, Barana Jayawardana, Janak Vidhanarachchi. Cowpea (Vigna unguiculata L. Walp.) incorporated experimental diets modulate serum lipids and cecal microflora in Wistar rats (Rattus norvegicus), pp 1-10, 13 th Asian Food Conference, 9-11 September 2013 Singapore. (2013),
    • Perera G.D.R.K, Pushpakumara P.G. A, Silva L.N.A.de, Perera B.M.A.O. and P.A.B.D. Alexander. Establishment of multiple ovulation and embryo transfer (MOET) technology for goats in Sri Lanka, In; N.E. Odongo, M. Garcia, and G.J. Viljoen (eds), Sustainable Improvement of Animal Production and Health, Joint FAO/IAEA Programme, Food and Agriculture Organization of the United Nation, Rome, pp 215-218. (2010) ISBN No; 978-92-5-106697-3 www. fao.org/docrep/013/i1860e/i1860e00.htm, www-naweb.iaea.org/nafa/aph/.../aph-sustainable-improvement.html
    • W.M.N.K. Jayathilake, W.M.T.D. Rathnakumara, K. Nizanantha, H.T.S.I. Madushanka, Y. Prashanth, G.D.R.K. Perera* and P.A.B.D. Alexander, Effect of Heat Stress on Pregnancy Rate in Crossbred Temperate Dairy Cattle under Tropical conditions. Challengers to humankind in the face of new technologies,KDU- iRC 12th International Research Conference, General Sir John Kothalawala Defence University, Sri Lanka, pp 640-643, (2019).

      Abstract (national)

    • S .M.D.S.K. Nayanakarathna, Y.K. Jayawardana, A.G.V.P. Jayamali, H.M.H.S. Ariyarathne, G.D.R.K. Perera*, and W.M.D. Karunarathna, Succesful Surgical Management of Low-Grade Fibro Sarcoma of the Ear Pinna in a Jamnapari Goat: A Case Report. Proceedings of 77 th annual scientific sessions of Sri Lanka Veterinary Association 2025. pp 03.
    • S.M.D.S.K. Nayanakarathna, Y.K. Jayawardana, B.P. Waidyarathna, H.M.H.M. Rupathnga,H.M.H.S Ariyarathne, S.A.S. Indunika, R.R.M.K.K. Wijesundara, S.De Silva and G.D.R.K. Perera*, Malignant Progression of dermal Melanoma in a Thoroughbred Stallion: A Necropsy Case Report. . Proceedings of 77 th annual scientific sessions of Sri Lanka Veterinary Association 2025. pp 22.
    • S.M.D.S.K. Nayanakarathna, and G.D.R.K. Perera*, Establishment and Cryptopreservation of primary Cultures of Wild Animal for Genomic Conservation: A Preliminary Study. Proceedings of 77 th annual scientific sessions of Sri Lanka Veterinary Association 2025. pp 52.
    • W.P.P.S.I. Perera, P.G.A. Pushpakumara, P.A.B.D. Alexander, and G.D.R.K. Perera*, Effects of Artificial Insemination Techniques and Efficiency of Oestrus Synchronisation Methods on Reproductive Performance in Goats in Sri Lanka. Proceedings of 77 th annual scientific sessions of Sri Lanka Veterinary Association 2025. pp 43.
    • L.G.P. Thushara, S.M.D.S.K. Nayanakarathna, Y.K. Jayawardana, A.G.V.P. Jayamali, R.R.M.K.K. Wijesundara, and G.D.R.K. Perera*, Succesfull Management of Severe Haematuria in a Pregnant Cow: A Case Report. Proceedings of 77 th annual scientific sessions of Sri Lanka Veterinary Association 2025. pp 39.
    • G.M. Vidura, N.S.Rathnayake, R. Vijayakumaran, T. Herath, W.M.M.B.Wijekoon, R.Jinadasa, C.D. Gamage and G.D.R.K.Perera*, Serological evidence for the presence Leptospira spp. among horses in a state equine unit: Apriliminiry study. Proceedings of 76 th annual scientific sessions of Sri Lanka Veterinary Association 2024. pp 08.
    • G.M. Vidura, Y.K.Jayawardana, and G.D.R.K.Perera*, Surgical management of anorectal agenesis in calves; Two case studies. Proceedings of 75 th annual scientific sessions of Sri Lanka Veterinary Association 2023. pp 53.
    • S.U.G.Amarasena, N.M.T.Anupama, D.S.Thilakarathna, G.D.R.K.Perera*, H.A.R.de Zoysa, Y.K.Jayawardana, and R.P.V.J.Rajapakse, Morphological and molecular characterization of Babesia spp. in donkey: A case report. Proceedings of 75 th annual scientific sessions of Sri Lanka Veterinary Association 2023. pp 21.
    • Y.K.Jayawardana, G.M. Vidura, S.U.G. Amarasena, B.K.Katapearachchi N.M.T.Anupama, and G.D.R.K.Perera*, Detecting anaplasmosis as a cause of hemoglobinuria in the mid-country of Sri Lanka. Proceedings of 75 th annual scientific sessions of Sri Lanka Veterinary Association 2023. pp 03.
    • W.P.P.S.I.Perera, G.M. Vidura, Y.K.Jayawardana, P.G.A.Pushpakumara, P.ABD.Alexander and G.D.R.K.Perera*, Response to GnRH administration on AI in Saanen goats at upcountry farms in Sri Lanka. Proceedings of 74 th annual scientific sessions of Sri Lanka Veterinary Association 2022. pp 9.
    • K.Jayawardana, N.P.Kaluarachchi, W.P.P.S.I.Perera, G.M. Vidura, D.M.A.P.Dissanayaka, H.M.H.S.Ariyarathne and G.D.R.K.Perera*Splinic lympoma in a throughbred horse: A case report. Proceedings of 74 th annual scientific sessions of Sri Lanka Veterinary Association 2022. pp 48.
    • G.M. Vidura, W.P.P.S.I.Perera, Y.K.Jayawardana, G.S.P.de S.Gunawardena, P.G.A.Pushpakumara and G.D.R.K.Perera*. Rabies in a Goat; a Case Report. Proceedings of 74 th annual scientific sessions of Sri Lanka Veterinary Association 2022. pp63.
    • S.A.S.Indunika, H.M.S.Wasana, M. Thalib, D.A.Satharasinghe and G.D.R.K.Perera*, Nutritive content of Guinea-A and CO-3 (Hybrid Napier)grass against their heights, cultivated in Kandy district, Sri Lanka. Proceedings of 74 th annual scientific sessions of Sri Lanka Veterinary Association 2022. pp 13.
    • A.U.G.Amarasena, R.P.V.J.Rajapakse, G.D.R.K.Perera, Y.K.Jayawardana and H.A.R.de.Zoysa, Phylogenetic characterisation of incidentially discovered Syngamus trachea from a backyard poultry carcass; A case report. Proceedings of 74 th annual scientific sessions of Sri Lanka Veterinary Association 2022. pp 41.
    • B.M.D.N.Kularatne, B.I.U.Perera, G.M.Vidura,Y.K.Jayawardana,H.E.L. De Seram, P.G.A.Pushpakumara and G.D.R.K. Perera*. Intestinal Phytobezoar in a Goat; anAberrantCase Report. The Sri Lanka Veterinary Journal, 73rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, 44 (2021)
    • D.P.H. Wijesekera, W.D.M. Perera, G.D.R.K Perera, S.S.S. de S. Jagoda A.W. Kaluphana. Morphological identification of fungi isolated from poultry feed in the North-Western Province of Sri Lanka. The Sri Lanka Veterinary Journal, 73rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, 8 (2021)
    • M.B.D. Lakmali, G.D.R.K. Perera, R.M.C. Deshapriya, P.A.B.D. Alexandre, D.M.S. Munasinghe and R.M.S.B.K.Ranasinghe. Use of Vestibular Cytology and Rectal Temperature as Indicators for Estrous Detection and Artificial Insemination in Goats. The Sri Lanka Veterinary Journal, 73rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, 56 (2021)
    • G.M. Vidura, Y.K.Jayawardana, B.M.D.N. Kularatne, W.P.P.S.I. Perera, P.G.A.S. Palkumbura, R.R.M.K.K.Wjesundara, P.G.A.Pushpakumara and G.D.R.K. Perera*. Cardiac Rhabdomyosarcoma in a Doe; a Case Report.The Sri Lanka Veterinary Journal, 73rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, 36 (2021)
    • W.P.P.S.I. Perera, W.M.T.D. Ratnakumara, P.G.A.S. Palkumbura, R.R.M.K.K. Wjesundara, G.D.R.K. Perera* and A.A.A.W.K. Amarasinghe Enucleation of a ‘Khilari’ Bull under the Field Condition; a Rare Case of Lacrimal Gland Neoplasia.The Sri Lanka Veterinary Journal, 73rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, 49 (2021)
    • Sameera Premaratne, Sampath Kalubowila, Chamari Kannangara, Suneth Disnaka, G.D.R.K Perera, Manjula P.S. Magamage. Artificial Insemination of Sheep in Sri Lanka: A Successful Preliminary Study. The Sri Lanka Veterinary Journal, 73rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, 59, (2021)
    • S. Premaratne, S. Disnaka, G.D.R.K Perera and M.P.S. Magamage New dimensions of swine breeding through artificial insemination in Sri Lanka. The Sri Lanka Veterinary Journal, 73rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, 60, (2021)
    • W.M.N.T.Jayathilake, G.D.R.K.Perera*, K. Nizanantha, L.N.A.de. Silva, P.A.B.D.Alexander, P.G.A.Pushpakumara. Phenotypic Characterization of Sri Lankan Ponies in Central province. The Sri Lanka Veterinary Journal, 71st Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, 65 (2019)
    • D.M.V.S. Premarathne, W.M.T.D. Rathnakumara, G.D.R.K.Perera*, W.M.N.T. Jayathilake, P.A.B.D. Alexander. Comparison of two superovulatory protocols for embryo collection in goats. The Sri Lanka Veterinary Journal, 71st Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, 95 (2019)
    • G.G.T. Nisansala, W.M.N.K. Jayathilake, M.A. Salgadu, H.R.N. Jinadasa and G.D.R.K. Perera* A preliminary survey of bacterial flora in external ear canal of race horses in Sri Lanka. The Sri Lanka Veterinary Journal, 70th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 63, 35(2018)
    • Jayathilake H.T.M., Perera G.D.R.K and Alexander P.A.B.D., Embryo production in sow using a superovulatory protocol. First undergraduate research symposium, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya. 52, (2018).
    • Ubayasiri P.C., Perera G.D.R.K and Alexander P.A.B.D., Collection and Cryopreservation of Semen from Jaffna Local Sheep. First undergraduate research symposium, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya. 58, (2018).
    • Rathnayaka R.M.M.N., Perera G.D.R.K. and Alexander P.A.B.D., Collection and Cryopreservation of Goat Semen. First undergraduate research symposium, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya.63, (2018)
    • W. M. N. K. Jayathilake, G.D.R.K Perera, H.R.N. Jinadasa. Survey of Bacterial Flora in the Nasal Cavity of Horses in an Upcountry Stable. The Sri Lanka Veterinary Journal, 69th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 62, 87 (2017)
    • A.M.P. Abeysinghe, G.D.R.K Perera, M.P.K.Sanjeewa, P.G.A. Pushpakumara, L.N.A.de Silva, D.R.T.G.Ratnayake and B. Alexander .Effect of estrus synchronization method on conception rate of goats. The Sri Lanka Veterinary Journal, 64th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 57, 28,(2012)
    • Umanga C. Gunasekara, J.L.C.S.Perera, C.Dushyanthan, A.M.P. Abeysinghe, G.D.R.K Perera, A.A.A.W.K.Amarasinghe, P.G.A. Pushpakumara and L.N.A.de Silva. An outbreak of acute typhlocolitis in group of thoroughbred horses in single stable. The Sri Lanka Veterinary Journal, 64th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 57, 21,(2012)
    • N. Yazeewan, A.M.P. Abeysinghe, A.A.A.W.K.Amarasinghe, G.D.R.K Perera, P.G.A. Pushpakumara and L.N.A.de Silva. Use of a Simple Rope Harness in the Correction and Prevention of Vaginal Prolapse in Cows. The Sri Lanka Veterinary Journal, 63rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 45, (2011)
    • G.I.Nanayakkara, W.W.B. Dilhani and G.D.R.K.Perera. Establishment of a Method to Produce Deep Frozen Semen from Bulls in Field Situations. The Sri Lanka Veterinary Journal, 63rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 45, (2011)
    • Disnaka K.G.J.S, G.D.R.K.Perera, K.A.G. Pathmasiri, S.C.Kaduwela, Chandrawansa Pathiraja, R.M.B. Ellagala and Basil Alexander. Birth of the First Female Calf through Sexed-Semen Technology in Sri Lanka. The Sri Lanka Veterinary Journal, 63rd Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 45, (2011)
    • A.A.A.W.K.Amarasinghe, I. Gunaratnam, G.D.R.K. Perera and P.G.A. Pushpakumara, An alternative treatment approach for gangrenous mastitis in dairy goats: A case report The Sri Lanka Veterinary Journal, 61st Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 14, (2010)
    • Perera G.D.R.K, Gunaratnam I, Amarasinghe A.A.A.W.K, Gabadage K.P, Pushpakumara P.G.A, Silva L.N.A.de, Thiakawardhana T, and Alexander B. Establishment of a Method for Splitting and Transfer of Goat Embryos in Sri Lanka. The Sri Lanka Veterinary Journal, 61st Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 31, (2009)
    • Nishani K.B.M, Herath B.H.M.D, Disnaka K.G.J.S, Perera G.D.R.K, Dis sanayaka D.R.A, Silva L.N.A.de and Pushpakumara P.G.A, Prepartum Intra-Mammary Infution (IMI) in Heifers of Up-country Dairy Farms. The Sri Lanka Veterinary Journal, 61st Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 09, (2009)
    • Disnaka K.G.J.S, Amarasinghe A.A.A.W.K, Perera G.D.R.K, Kaduwela S.C, Pathiraja C and Basil Alexander. Comparision of Weight Gains of Cattle Offspring Produced through Embryo Transfer and Artificial Insemination. The Sri Lanka Veterinary Journal, 61st Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 14, (2009)
    • Perera R.A.A.P, Gabadage K.P, Perera G.D.R.K, Gunaratnam I, Malalasekara S.S.P, Silva L.N.A.de, Pushpakumara P.G.A and Alexander P.A.B.D. Study on Home Range of Endangered and Endemic Southern Purple- Faced Langer (Trachypithecus vetulus vetulus) in Weheragala Hill, Payagala Sri Lanka. The Sri Lanka Veterinary Journal, 61st Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 21, (2009)
    • Sureshkumar A, Perera G.D.R.K, Herath B.H.M.D, Gunaratnam I, Thalpearachchi T.A.D.N. and Pushpakumara P.G.A. Relationship between Plasma Insulin-Like Growth Factor-I and Fertility in Dairy Cows. The Sri Lanka Veterinary Journal, 61st Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 29, (2009)
    • Gunaratnam I, Neelawathura N.W.C.J.B, Aruna Amarasinghe, Perera G.D.R.K, Gabadage K.P, Malalasekara S.S.P, and Silva L.N.A.de. Successful Treatment of Ocular Nematodiasis in a Horse with Ivermectin. The Sri Lanka Veterinary Journal, 61st Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 56, 45, (2009)
    • Perera G.D.R.K, Pushpakumara P.G.A, Silva L.N.A.de, Basil Alexander. Production of genetically superior goats through embryo transfer technology in Sri Lanka. Post Graduate Institute of Agriculture, University of Peradeniya, Sri Lanka. Vol 20, pp 18. (2008).
    • Pathiraja C, Kaduwela S.C, Perera D.V.H, Weerasekara N.B, Munaweera A.C.H, Madurusinghe J, Samarawickrama H.W.T.M, Disnaka K.G.J.S., Karunarathna W.M, Nimalsiri N.G, Witharana W.P.J, Padmasiri K.A.G, Jayawardana D.U, Adhikari A.M.P.A, Gunarathne S, Dharmarathna D.B.W., Perera G.D.R.K, Pushpakumara P.G.A, Silva L.N.A.de, Shane Ashworth, Mathew Barber, Herath H.M.S.P. and Alexander B., Progress of cattle embryo transfer in Sri Lanka: a pilot project achieves high success rates, The Sri Lanka Veterinary Journal, 60th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 55, 02, (2008)
    • K.G.J.S. Disnaka, S.C.Kaduwela, G.D.R.K. Perera, L.N.A.de Silva, P.A.B.D. Alexander, P.G.A Pushpakumara. Reproductive performances of large Friesian cattle farm in up country, Sri Lanka, The Sri Lanka Veterinary Journal, 60th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 55, 03, (2008)
    • S.S.P.Malalasekara, G.D.R.K. Perera, I. Gunaratnam, M. Somarathne, K.H.D.T.Kasagala, J.M.K.G.K.Jayasundara, S.P.Gunarathna, D.H.A.Subasinghe, P.A.B.D. Alexander, P.G.A Pushpakumara and L.N.A.de Silva, Acase report: Porcine parvo viral infection in the Veternary teaching farm, The Sri Lanka Veterinary Journal, 60th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 55, 10, (2008)
    • I. Gunaratnam, G.D.R.K. Perera, K.G.S.K Senarathna, N.W.C.J.B Neelawathura, K. Abirami, S.S.P.Malalasekara, P.A.B.D. Alexander, P.G.A Pushpakumara and L.N.A.de Silva, Case summary of urolithiasis in male goats presented to the Veterinary teaching hospital during 2007, The Sri Lanka Veterinary Journal, 60th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 55, 11, (2008)
    • K.G.S.K Senarathna, N.W.C.J.B Neelawathura, G.D.R.K. Perera, K. Abirami, , I. Gunaratnam and L.N.A.de Silva, Treatment of a sarcoid in a poney with cryosurgery, The Sri Lanka Veterinary Journal, 60th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 55, 12, (2008)
    • R.A.N.C.Rjapaksha, N.R. Wellaaili, G.D.R.K. Perera and Basil Alexander, Priliminary results on semen evaluation and preservation in tilapia (Oreochromis mossambicus) The Sri Lanka Veterinary Journal, 60th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 55, 17, (2008)
    • Perera G.D.R.K, Disnaka K.G.J.S, Meegahakotuwa M.G.D.S.B, Pushpakumara P.G.A, Silva L.N.A.de, King W.A, Alexander B., ‘Peradeniya Kumari’(PK-1): A landmark of animal breeding strategies in Sri Lanka, The Sri Lanka Veterinary Journal, 59th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 54, 01, (2007)
    • Pathiraja C, Kaduwela S.C, Perera D.V.H, Weerasekara N.B, Munaweera A.C.H, Madurusinghe J, Samarawickrama H.W.T.M, Karunarathna W.M, Nimalsiri N.G, Witharana W.P.J, Padmasiri K.A.G, Jayawardana D.U, Adhikari A.M.P.A, Gunarathne S, Nanayakkara I, Perera G.D.R.K, Pushpakumara P.G.A, Silva L.N.A.de, Shane Ashworth, Mathew Barber, Alexander B., Embryo transfer in cattle: A report of a pilot study in the coconut-triangle in Sri Lanka, The Sri Lanka Veterinary Journal, 59th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 54, 03, (2007)
    • Seneviratne P.G, Herath H.M.S.P, Perera G.D.R.K, Pushpakumara P.G.A, Alexander B.Application of different hormonal treatment protocols to overcome infertility in artificially bred cattle, The Sri Lanka Veterinary Journal, 59th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 54, 05, (2007)
    • Neelawathura N.W.C.J.B, Senarathna K.G.S.K, Abirami K, Perera G.D.R.K, Kottawaththa K.S.A, Kalupahana R.S, Pushpakumara P.G.A, Alexander B. A combination of parenteral antibiotic and intra-uterine enrofloxacin to overcome pyometra in cattle and buffaloes, The Sri Lanka Veterinary Journal, 59th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 54, 13, (2007)
    • Senarathna K.G.S.K, Abirami K, Neelawathura N.W.C.J.B, Perera G.D.R.K, Gunwardana S.E.S, Silva L.N.A.de, Gangrenous mastitis in a goat: a case study, The Sri Lanka Veterinary Journal, 59th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 54, 28, (2007)
    • Perera G.D.R.K, Meegahakotuwa M.G.D.S.B, Abeygunawardene W.W, Jayapani V.P.P, Herath H.M.S.P, Seneviratne P.G., Pushpakumara P.G.A, Silva L.N.A.de, King W.A, Alexander B. Establishment of a procedure for cryobanking of semen from indigenous cattle in Sri Lanka, The Sri Lanka Veterinary Journal, 58th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 53, 32, (2006)
    • Perera G.D.R. K, Meegahakotuwa M.G.D.S.B, Herath H.M.S.P, Seneviratne P.G., Pushpakumara P.G.A, Chandrasiri A.D.N, Silva L.N.A.de, King W.A, Alexander B. Embryo production and transfer in goats and cattle in Sri Lanka: A preliminary investigation, The Sri Lanka Veterinary Journal, 58th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 53, 36, (2006)
    • Perera G.D.R.K, Meegahakotuwa M.G.D.S.B, Pushpakumara P.G.A, Silva L.N.A.de, King W.A, Alexander B. Cryobanking of spermatozoa from a barking deer (Muntiacus muntiacus): An initiative to conserve germplasm of wildlife in Sri Lanka, Proceeding of the Peradeniya University Research Sessions, Sri Lanka , Vol 11, 58, (2006)
    • Meegahakotuwa M.G.D.S.B, Perera G.D.R.K, Deepani M.L.A.N.R, Pushpakumara P.G.A, Silva L.N.A.de, King W.A, Alexander B, In-vitro production of goat embryos, Proceeding of the Peradeniya University Research Sessions, Sri Lanka , Vol 11, 57, (2006)
    • Disnaka K.G.J.S, Perera G.D.R.K, Wickremasinghe I.N.A, Pushpakumara P.G.A, Silva L.N.A.de, Patent ductus arteriosus (PDA) and ventricular septal defect (VSD) in a young friesian calf, The Sri Lanka Veterinary Journal, 58th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 53, 14, (2006)
    • Deepani M.L.A.N.R, Perera G.D.R.K, Meegahakotuwa M.G.D.S.B, Pushpakumara P.G.A, Silva L.N.A.de, King W.A, Alexander B. Cryopreservation of somatic cells for chromosomal studies in cattle and horse, Proceeding of the Peradeniya University Research Sessions, Sri Lanka , Vol 11, 56, (2006)
    • Rabel R.A.C, WijesingheU.I.K.B, Perera G.D.R.K, Silva L.N.A.De, Colostomy, as a means of faecal diversion in a calf with colo-rectal atresia, The Sri Lanka Veterinary Journal, 57th Annual Convention and Scientific Session of the Sri Lanka Veterinary Association, Vol 52, 09, (2005)