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Dr. Nadarajah Ragavan
Senior Lecturer Gr II
N. Ragavan is a Senior Lecturer in the Department of Fisheries, University of Jaffna, Sri Lanka. His academic and research interests centre on fisheries science, fisheries management, and the sustainable use of aquatic resources, with particular emphasis on fish and shrimp population dynamics, stock assessment, small-scale fisheries, and fisheries livelihoods. His research has focused extensively on the Jaffna Lagoon and the Palk Bay region, addressing fisheries status, fishing impacts, community livelihoods, and fishers’ perspectives in support of sustainable fisheries management.
Research Interests
Academic Profile
Ph.D
Ph.D. in Zoology
University of Sri Jayewardenepura, Sri Lanka (2022–2025)
MSc
M.Sc. in Fisheries and Aquatic Resources Management
University of Sri Jayewardenepura, Sri Lanka (2017–2020)
BSc
B.Sc. (Hons) in Biological Sciences, Major in Fisheries Science
University of Jaffna (2010–2015)
Admin Roles
2025–2026
Co-Investigator, BIMReN Twinning Research Grant: Sustaining Fisheries Ecosystem in the Palk Bay Region: Assessing Management Options, Livelihoods, and Fishers' Perspectives
BoBP-IGO, in collaboration with the University of Jaffna, Rajarata University of Sri Lanka, Tamil Nadu Fisheries University, and ICAR–Central Institute of Fisheries Education (January 2025–December 2026)
2025
Co-Investigator, BOBLME Project, EAFM Plan Development: Scoping and Planning for the Implementation of the Ecosystem Approach to Fisheries Management (EAFM) in Sea Cucumber Fishery in the Mannar–Kilinochchi–Jaffna Districts of Sri Lanka
BoBP-IGO & FAO
2021–2022
Principal Investigator, Quantitative and Qualitative Assessment of Genomic DNA Extracted from Cryptic Sardinella Species with PCR Optimization
University Research Grant, University of Jaffna
Publications (5)
2026
Population parameters and waste valorization of triggerfish (Canthidermis maculata): A case study from Sri Lanka
Marine Biology Research, 1–15 — Karunarathne, S., Jayasekara, N.M.S., Samaraweera, V.D., Ragavan, N., Dissanayake, D.C.T. — DOI: 10.1080/17451000.2026.2661324
2025
Shrimp Fishery in the Jaffna Lagoon, Sri Lanka: Ten Years After the Conflict
Asian Fisheries Science, 39: 30–45 — Ragavan, N., Kuganathan, S., Dissanayake, D.C.T.
2025
Alleviating Poverty in Small-Scale Fisheries: A Sustainable Livelihood Approach for the Jaffna Lagoon Shrimp Fishing Community
Vingnanam Journal of Science, 20 — Ragavan, N., Kuganathan, S., Dissanayake, D.C.T. — DOI: 10.4038/vingnanam.v20i1.4249
2025
Does shrimp trawling contribute to the decline in sciaenid stocks?
Regional Studies in Marine Science, 81: 103944 — Jayasekara, N.M.S., Ragavan, N., Dissanayake, D.C.T. — DOI: 10.1016/j.rsma.2024.103944
2024
Effects of juvenile mortality on population dynamics of Penaeus semisulcatus: a case study from Sri Lanka
Fisheries Research, 274: 106991 — Ragavan, N., Kuganathan, S., Dissanayake, D.C.T. — DOI: 10.1016/j.fishres.2024.106991
Teaching
Course
Fish Biology and Embryology (FIS204G2)
Department of Fisheries, University of Jaffna
Course
Fisheries Management and Extension (FIS303G2)
Department of Fisheries, University of Jaffna
Course
Conservation of Fisheries Resources & Law (FIS305G2)
Department of Fisheries, University of Jaffna
Course
Fisheries Socioeconomics (FIS411M2)
Department of Fisheries, University of Jaffna