J. A. Johnson, Ph.D.


Dr. J. A. Johnson
Scientist - E, Head
Phone: +91-135-2646285
Mobile: +91 9410992211
E-mail: jaj [at] wii [dot] gov [dot] in


I received my PhD degree in Zoology in 2000 from Manonmanam Sundaranar University, Tamil Nadu and I studied “Diversity and ecological structure of fishes in Western Ghats streams, India”. My research included species distribution patterns, community structure, spatio-temporal changes in resource (food and space) partition among co-existing species, conservation of rare and threatened species and effects of human disturbance on aquatic resources. I described three new species and found out several new records of fishes from Western Ghats. After joined as faculty, I explored diversity and distribution patterns of fishes in Himalaya and Central Indian rivers. My primary interests are understanding microhabitat requirement of threatened fishes, generating habitat suitability curves, understanding resource partitioning, Ecological flow estimation for aquatic species and aquatic habitat monitoring and conservation.

Member in: Environmental Appraisal Committee (River Valley & Hydroprojects), MoEFCC, New Delhi; Research Council Member, Uttarakand Biodiversity Board, Dehradun & Member, IUCN-Freshwater fish specialist group, UK.

Area of Specialization

Stream community ecology, River ecology, Fish community ecology and aquatic monitoring.

Current Projects

  Ecology and migratory patterns of Golden Mahseer (Tor putitora) in river Ganga using radio telemetry techniques.
  Conservation and management of Golden Mahseer in Kosi river, Uttarakhand. Phase-I: Status Assessment.
  Project co-ordinator: Planning aquatic species restoration for Ganga River – under National Mission for Clean Gnaga (NMCG), Ministry of Water Resources.
  Recovery of Dugongs and their habitats in India: An Integrated Participatory Approach.
  Status of fish diversity in sahaydri Tiger Rserve, Maharastra.

Key Publications

  Johnson, J.A., K. Sivakumar and R. Jordan. 2017. Ecological flow requirement for fishes of Godavari river: flow estimation using the PHABSIM method. Current Sciences, 113(11): 2187-2193.
  Vandana, R., J.A. Johnson and K. Sivakumar (2013). Environmental effects on the morphology of the snow trout Schizothorax richardsonii (Gray, 1832). TAPROBANICA, 05(2): 102–110.
  Johnson, J.A. and M. Arunachalam (2012). Feeding habit and food partition in a stream fish community of Western Ghats, India. Environmental Biology of Fishes, 93: 51-60.
  Johnson, J.A. and M. Arunachalam (2009). Diversity, distribution and assemblage structure of fishes in streams of southern Western Ghats, India. Journal of Threatenedtaxa, 1(10):507-513.

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