Mr. Ragavan Nadarajah

B.Sc (UOJ, SL), M.Sc (USJP, SL) and PhD (reading, USJP, SL)

Lecturer (Prob)

Specialised in stock assessment, Fisheries management and socio economics

ragavan@univ.jfn.ac.lk

Academic Profile

  • Reading Ph.D. in Zoology, Faculty of Graduate Studies, University of Sri Jayewardenepura, Sri Lanka
  • Title-The fishery and population dynamics of selected shrimp species in Jaffna lagoon, Sri Lanka, and local ecological knowledge in community-based management as a smart management option
  • M.Sc. in Fisheries and Aquatic Resources Management, Faculty of Graduate Studies, University of Sri Jayewardenepura, Sri Lanka, 05.08.2017 – 05.05.2020.
  • B.Sc. (Hons) in Biological Sciences (Major in Fisheries science), Faculty of Science, University of Jaffna, Sri Lanka, October 2010 – April 2015

Admin Roles

  • Lecturer, Department of Fisheries, University of Jaffna, Sri Lanka, 02nd March 2018 to date.
  • Fisheries Officer, Department of Fisheries and Aquatic Resources, Ministry of Fisheries, Sri Lanka from 1st June to 27th February 2018.

Awards, scholarships & fellowship

  • Fellow, Advance Training Programme in Fisheries Policy and Management, United Nation University – Fisheries Training Programme (UNU-FTP), Iceland, September 2018 – March 2019. (URL: https://www.grocentre.is/ftp/moya/gro/index/fellow/ragavan-nadarajah)
  • Fellow, Fishery Oceanography for UN Ocean Decade (F.O.O.D) course conducted by the Indian National Centre for Ocean Information Services (INCOIS) in Hyderabad, India under Indian Technical and Economic Cooperation Programme (ITEC), Ministry of External Affairs, Government of India

Patents, Book chapters and research papers

  • Ragavan, N., Kuganathan, S. and Dissanayake, D.C.T. 2024. Effects of juvenile mortality on
  • population dynamics of Penaeus semisulcatus: Fisheries Research, 274 (106991). DOI: https://doi.org/10.1016/j.fishres.2024.106991
  • Nilakshana, K., Shobiya, P., Dilini, J., Ragavan, N., Sivashanthini, K. and Sutharshiny, S., 2021. Contribution of Women in Fisheries and Fishery Related Activities in Ponnalai, Jaffna, Sri Lanka. Vingnanam Journal of Science, 16(1), p.16.
  • Ragavan, N., Dissanayake, D.C.T. and Kuganathan, S., 2021. Status of the fishery of Jaffna lagoon, Sri Lanka. Sri Lanka Journal of Aquatic Sciences, 26(1), pp.55–66. DOI: http://doi.org/10.4038/sljas.v26i1.7584
  • Ragavan, N., Sivashanthini, K., and Sutharshiny, S., 2016. Socio-economic status of fishers in Allaipiddy village, Jaffna, Vingnanam Journal of Science, 12 (1 &2), 42-28.

Conference papers, Presentation and Abstracts

  • Ragavan, N., Kuganathan., Alam., M.S., and D.C.T. Dissanayake., 2023., Assessing the stock status of Metapenaeus monoceros (Miers, 1878) in Jaffna lagoon using length-based indicators: Implications for sustainable fisheries management, Conference: 2nd International Seminar on Fish and Fisheries Sciences (2nd ISFFS), Bali, Indonesia.
  • Shamanthi, I., Ragavan, N., and Kuganathan, S., 2023. Morphometric length-weight relationships of Penaeus semisulcatus (De Haan,1884) from trawl catches at Gurunagar, Jaffna. 29th Annual Scientific Sessions, Jaffna Science Association, Jaffna.
  • Janani, N., Wickramaratne, I.U., Ragavan, N., 2023. Preliminary study of bycatch and discards composition of shrimp fyke net fishery in Gurunagar, Sri Lanka. In: 7th International Research Conference of Uva Wellassa University, Badulla, Sri Lanka.
  • Shamanthi, I., Arthiyan, S., Harichandra, K., Ragavan, N., and Kuganathan, S., 2023. Catch composition and seasonal variations of shrimp trawl landings with new species records off Gurunagar coast, Northern Sri Lanka. Proceedings of FARS2023, Faculty of Applied Science, University of Vavuniya, Vavuniya.
  • Thapeetha, Y., Saruga, K., Uventhika, S., Sivagini, K., Ragavan, N., Nahmahal, K., Shobiya, P., Harichandra, K., Sivasanthini, K and Sutharshiny, S., 2022. A study on mass accumulation of macrophytes in Northern and Eastern coast of Sri Lanka. In:13th Asian Fisheries and Aquaculture Forum, Taiwan
  • Ragavan, N., Dissanayake, D.C.T., Kuganathan, S. and Ajmal Khan, S., 2022. Preliminary studies on status of gears on shrimp fishery in Jaffna lagoon, Sri Lanka. In: International Research Conference of Uva Wellassa University – 2022, Badulla, Sri Lanka
  • Vithursha, N., Ragavan, N. and Edirisinghe, U., 2021. Population parameters of Penaeus semisulcatus (De Haan, 1884) caught by fyke net fishers from Kachchai fishing ground of Jaffna estuary, Sri Lanka. In: Thirty-Third Annual Congress of the PGIA, Peradeniya: PGIA.
  • Naafir, E., Ragavan, N., Thapeetha, Y. and Kuganathan, S., 2020. Fyke net fishery and population parameters of shrimps in the Columbuththurai landing site of Jaffna lagoon, Sri Lanka. In: Proceedings of the Students’ Research Symposium 2020. Jaffna: ZSA.
  • Fernanado, A., Shobiya, P., Ragavan, N. and Kuganathan, S., 2020. Assessment of selected water quality parameters in Kakkaitheevu lagoon, Jaffna, Sri Lanka. In: Proceedings of the Students’ Research Symposium 2020. Jaffna: ZSA.
  • Sivashanthini, K., Gunaalan, K., Harichandra, K., Sutharshiny, S., Warnasuriya, T.W.S., and Ragavan, N., 2019. Salinity variations in surface water systems in Delft Island Sri Lanka. Proceedings of the 39th Annual Sessions- Institute of Biology, Colombo.
  • Nilakshana, K., Dhanushka Dilini Jayaweera, N J.G.B., Ragavan, N., Shobiya, P and Kuganathan, S., 2019. Women’s contribution in fisheries and fishery related activities in Ponnalai, Jaffna. 26th Annual Scientific Sessions, Jaffna Science Association, Jaffna.