Habitat Ecology and Ichthyofaunal Diversity in the Subansiri Sub-Basin, North-East India

B. Bakalial, Shyama Prasad Biswas, L. P. Hazarika, Debojit Baruah, A. Santosh Kumar Singh


The instream and riparian zones of the Subansiri offer a variety of microhabitats each having distinct physico-chemical characteristics and fish biota. We recognised 14 habitat types based on their limnological parameters, and collected 204 fish species belonging to 101 genera and 34 families  of which cyprinids were the most dominant (72 species). Ichthyofauna of Subansiri sub-basin was grouped into 10 trophic classes based on their morpho-anatomy of feeding organs and gut contents. The physico-chemical parameters of the river water were  within the permissible limit of BIS except at Chauldhuwaghat where transparency was exceedingly low even during winter months and pH was relatively high (8.2). There is an increasing trend of siltation in the deep pools of the river. The Shannon diversity index ranged from 2.684 to 5.792, with a mean of 4.709±0.943. The maximum value was observed for floodplain lakes from where 54.41% of the fish species were recorded.


Fish Biodiversity; Habitat Ecology; Floodplain Lakes; Subansiri River


Abbe, T.B. and Montgomery, D.R. 1996. Large woody debris jams, channel hydraulics and habitat formation in large rivers. Proceedings of International Symposium on Habitat Hydraulics, Trondheim. Regulated Rivers: Research and Management 12: 201-221.

Angermeier, P.L. 1987. Spatiotemporal variation in habitat selection by fishes in a small Illinois stream. Pages 52-60, In: Matthews, D.C. and Heins, W.J. (Editors) Community Ecology of North American Stream Fishes. University of Oklahoma Press, Norman, USA.

Anon. 2010. Downstream Impact Study of the Ongoing Subansiri Lower Hydroelectric Power Project at Gerukamukh. Expert Committee Report of National Hydroelectric Power Corpo-ration Limited, New Delhi.

APHA. 1989. Standard Methods for the Examination of Water and Wastewater.17th edition. American Public Health Association, Washington, DC. 1268 pages.

Armantrout, N.B. (Compiler). 1999. Aquatic Habitat Inventory Terminology Glossary. American Fisheries Society, Bethesda, Maryland. 136 pages.

Arunachalam, M. 2000. Assemblage structure of stream fishes in the Western Ghats (India). Hydrobiologia 430: 1–31.

Baird, I.G.; Phylavanh, B.; Vongsenesouk, B. and Xaiyamanivong, K. 2001. The ecology and conservation of the small scale croaker, Boesemania microlepis (Bleeker 1858–59) in the mainstream Mekong River, southern Laos. Natural History Bulletin of the Siam Society 49: 161-176.

Baxter C.V. and Hauer, F.R. 2000. Geomorphology, hyporheic exchange, and selection of spawning habitat by bull trout (Salvelinus conuentus). Canadian Journal of Fisheries and Aquatic Sciences 57: 1470–1481.

Bayley, P.B. 1988. Factors affecting growth rates of young tropical fishes: seasonality and density-dependence. Environmental Biology of Fishes 21: 127-142.

Biswas, S.P. and Boruah, S. 2000a. Fisheries ecologyof the north-eastern Himalayas with special to the Brahmaputra River. Ecological Engineering 16: 39-50.

Biswas, S.P. and Boruah, S. 2000b. Ecology of the River Dolphin (Platanista gangetica) in the Upper Brahmaputra. Hydro-biologia 430: 97-111.

Boruah, S. and Biswas, S.P. 2002. Ecohydrology and fisheries of the upper Brahmaputra basin. Environmentalist 22: 119-131.

Brandt, S.A. 2000. Classification of geomorphological effects downstream of dams. Catena 40: 375–401.

Brierley, G.J.; Cohen, T.K.F. and Brooks, A. 1999. Post-European changes to the fluvial geomorphology of Bega catchment, Australia: implications for river ecology. Freshwater Biology 41: 839–848.

Cao, Y.; Larson. D.P. and Hughes, R.M. 2000. Evaluating sampling sufficiency in fish assemblage surveys, a similarity-based approach. Canadian Journal of Fisheries and Aquatic Sciences 58: 1782-1793.

Cheimonopoulou, M.T.; Bobori, D.C.; Theocharopoulos, I. and Lazaridou, M. 2011. Assessing ecological water quality with macroinvertebrates and fish: A case study from a small Mediterranean river. Environmental Management 47: 279–290.

Chen, W.; Almatar, S. and Bishop, J.M. 2009. Spatial and temporal variability of fish assemblage in Kuwait Bay. Marine Biology 156: 415–424.

Church, M. 1995. Geomorphic response to river flow regulation: Case studies and time-scale: Regulated Rivers: Research and Management 11: 3-22.

Copp, G.H. 1989. Electro fishing for fish larvae and 0+ juveniles: equipment modifications for increased ef ciency with short fishes. Aquaculture and Fisheries Management 20: 453–462.

Craig, J.F. 2000. Large dams and freshwater fish biodiversity. Contributing paper prepared for thematic review II.1: Dams, Ecosystem Functions and Environmental Restoration. World Commission on Dams, Capetown. 59 pages.

Dodge, D.P. and Biette, M.R. 1993. River protection in Ontario, Canada: a case for holistic catchment management. Pages 57-79, In: Boon, P.J.; Calow, P. and Petts, G.E. (Ediors) River Conservation and Management. John Wiley, Chichester, U.K.

Dudgeon, D. 1992. Endangered ecosystems: a review of the conservation status of tropical Asian rivers. Hydrobiologia 248: 167–191.

Friedman, J.M.; Osterkamp, W.R.; Scott, M.L. and Auble, G.T. 1998. Downstream effects of dams on channel geometry and bottomland vegetation: Regional patterns in the Great Plains. Wetlands 18: 619–633.

Gorman, O.T. and Karr, J.R. 1978. Habitat structure and fish communities. Ecology 59: 507-515.

Goswami, D.C. 1985. Brahmaputra River, Assam, India: Physio-graphy, basin denudation and channel aggradation, Water Resources Research 21: 959-979.

Goulding, M. 1981. The Fishes and the Forest: Explorations in Amazonian Natural History. University of California Press, Los Angeles. 280 pages.

Grant, G.E.; Schmidt, J.C. and Lewis, S.L. 2003. A geological framework for interpreting downstream effects of dams on rivers. Pages 209-225, In: O’Connor, J.E. and Grant, G.E. (Editors) A Unique River. Water Science and Application 7. American Geophysical Union, Washington, DC.

Greenberg, L.A.; Svendsen, P. and Harby, A. 1996. Availability of microhabitats and their use by brown trout, Salmo trutta, and grayling, Thymallus thymallus, in the River Vojman, Sweden. Regulated Rivers: Research and Management 12: 287–303.

Grossman, G.D.; de Sostoa, A.; Freeman, M.C. and Lobón-Cerviá, J. 1987. Microhabitat use in a Mediterranean riverine fish assemblage. Fishes of the lower Matarraña. Oecologia 73: 490–500.

Harper, D.M.; Smith, C.D.; Barham, P.J. and Howell, R. 1992. The ecological basis for the management of the natural river environment. Pages 219-238, In: Harper D.M. and Ferguson, A.J.D. (Editors) The Ecological Basis for River Management. John Wiley, Chichester.

Hicks, B.J.; Hall, J.D.; Bisson, P.A. and Sedell, J.R. 1991. Responses of salmonids to habitat changes. American Fisheries Society Special Publication 19: 483-518.

Jayaratne, R. and Surasinghe, T. 2010. General ecology and habitat selectivity of freshwater fishes of the Rawan Oya, Kandy, Sri Lanka. Sabaramuwa University Journal 9(1): 11-43.

Jhingran, V.G. and Ghosh, K.K. 1978. The fisheries of the Ganga River system in the context of Indian aquaculture. Aquaculture 14: 141-162.

Johnson, J.A. and Arunachalam, M. 2010. Relations of physical habitat to fish assemblages in streams of Western Ghats, India. Applied Ecology and Environmental Sciences 8(1): 1-10.

Junk, W.J.; Bayley, P.B. and Sparks, R.E. 1989. The flood pulse concept in river-floodplain systems. Pages 110-127, In: Dodge, D.P. (Editor) Proceedings of the International Large River Symposium. Canadian Special Publication of Fisheries and Aquatic Sciences 106.

Jurajda, P.1995. Effect of channelization and regulation on fish recruitment in a floodplain river. Regulated Rivers: Research and Management 10: 207–215.

Lakra, W.S.; Sarkar, U.K.; Kumar, R.S.; Pandey, A.; Dubey, V.K. and Gusain, O.P. 2010. Fish diversity, habitat ecology and their conservation and management issues of a tropical River in Ganga basin, India. Environmentalist 30: 306-319.

Lamouroux, N.; Capra, H.; Pouilly, M. and Souchon, Y. 2004. Fish habitat preferences in large streams of southern France. Freshwater Biology 42: 673–687.

Lelek, A. 1987. The Freshwater Fishes of Europe. Volume 9. Threatened Fishes of Europe. Aula Verlag, Wiesbaden. 343 pages.

Ligon, F.K.; Dietrich, W.E. and Trush, W.J. 1995. Downstream ecological effects of dams. Bio Science 45: 183-192.

Magurran, A.E. 1988. Ecological Diversity and Its Measurement. Princeton University Press, Princeton, NJ. 149 pages.

Matthews, W.J. 1985. Critical current speeds and microhabitats of the benthic fishes, Percina roanoka and Etheostoma flabellare. Environmental Biology of Fishes 12: 303-308

Matthews, W.J. 1998. Overview of fishes and fish assemblages. Pages 1-29, In: Patterns of Freshwater Fish Ecology. Kluwer Academic Publishers, Dordrecht.

Minshall, G.W.; Cummins, K.W.; Petersen, R.C.; Cushing, C.E.; Bruns, D.A.; Sedell, J.R. and Vannote, R.L. 1985. Develop-ments in stream ecosystem theory. Canadian Journal of Fisheries and Aquatic Sciences 42:1045–1055.

Montgomery, D.R.; Smith, R.D.; Schmidt, K.M. and Pess, G.R. 1995. Pool spacing in forest channels. Water Resources Research 31: 1097-1105.

Muhar, S.; Schwarz, M.; Schmutz, S. and Jungwirth, M. 2000. Identification of rivers with high and good habitat quality: Methodological approach and applications in Austria. Hydrobiologia 422: 343-358.

Naesje, T.F.; Hay, C.J.; Nickanor, N.; Koekemoer, J.H.; Strand, R. and Thorstad, E.B. 2004. Fish Populations, Gill Net Catches and Gill Net Selectivity in the Kwando River, Namibia. NINA Project Report 27. Norwegian Institute for Nature Research, Trondheim. 64 pages.

Natarajan, A.V. 1989. Environmental impacts of Ganga basin development on gene-pool and fisheries of the Ganga river system. Special Publication Canadian Journal of Fisheries and Aquatic Sciences106: 545–560.

Nelson, J.S. 1994. Fishes of the World. Third edition. John Wiley, New York. 600 pages.

Offem, B.O.; Ayotunde, E.O.; Ikpi, G.U.; Ochang, S.N. and Ada, F.B. 2011. Influence of seasons on water quality, abundance of fish and plankton species of Ikwori Lake, south-eastern Nigeria. Fisheries and Aquaculture Journal 2: FAJ-13 (18 pages).

Offem, B.O.; Samsons, Y.A. and Omoniyi, I.T. 2009. Fish compo-sition and abundance in the wetlands of Cross River, Nigeria. Aquatic Ecology 43: 1155–1166.

Peltrakis, G. and Stergiou, K.I. 1995. Weight-length relationships for 33 fish species in Greek waters. Fisheries Research 21: 465-469.

Petts, G.E. 1979. Complex response of river channel morphology subsequent to reservoir construction. Progress in Physical Geography 3: 329–362.

Pizzuto, J.E.; Hession, W.C. and McBride, M. 2000. Comparing gravel-bed rivers in paired urban and rural catchments of southeastern Pennsylvania. Geology 28: 79-82.

Poff, N.L.; Allan, J.D.; Bain, M.B.; Karr, R.R.; Prestegaard, K.L.; Richter, B.D.; Sparks, R.E. and Stromberg, J.C. 1997. The natural flow regime. Bio Science 47: 769-784.

Poulsen, A.F. and Valbo-Jørgensen, J. (Editors). 2000. Fish Migrations and Spawning Habits in the Mekong Mainstream – A Survey Using Local Knowledge. AMFC Technical Report, Mekong River Commission.

Pusey, B.J.; Arthington, A.H. and Read, M.G. 1993. Spatial and temporal variation in fish assemblage structure in the Mary river, south-east Queensland: The influence of habitat structure. Environmental Biology of Fishes 37: 355–380.

Quraishee, G.S. 1988. Variation in the Indus River discharges and their hazards. Pages 369-375, In: El-Sabh, M.I. and Murty, T.S. (Editors) Natural and Man-Made Hazards. Proceedings of the International Symposium held at Rimouski, Quebec, Canada, 3-9 August, 1986. D. Reidel Publishing, Dordrecht.

Ralph, S.; Poole, G.; Conquest, L. and Naiman, R.J. 1994. Stream channel morphology and woody debris in logged and unlogged basins in western Washington. Canadian Journal of Fisheries and Aquatic Sciences 51: 37-51.

Rao, K.L. 1975. India’s Water Wealth. Orient Longman, New Delhi. 255 pages.

Richter, B.D.; Baumgartner, J.V.; Powell, J. and Braun, D.P. 1996. A method for assessing hydrologic alteration within ecosystems. Conservation Biology 10: 1163–1174.

Salas, F.; Neto, J.M.; Borja, A. and Marques, J.C. 2004. Evaluation of the applicability of a marine biotic index to characterize the status of estuarine ecosystems: the case of Mondego estuary (Portugal). Ecological Indicators 4: 215-225.

Schiemer, F. and Waidbacher, H. 1992. Strategies for conservation of a Danubian fish fauna. Pages 364-382, In: Boon, P.J.; Calow, P. and Petts, G.E. (Editors) River Conservation and Manage-ment . John Wiley, London.

Schiemer, F. and Zalewski, M. 1992. The importance of riparian ecotones for diversity and productivity of riverine fish communities. Netherlands Journal of Zoology 42: 323-335.

Schiemer, F.; Kecheis, H.; Reckendorfer, W. and Winkler, G. 2003. The inshore retention concept and its significance for large rivers. Archiv für Hydrobiologie135: 509-516.

Schlosser, I.J. 1982. Fish community structure and function along two habitat gradients in a headwater stream. Ecological Monographs 52: 395–414.

Shannon, C.E. and Weiner, W. 1949. The Mathematical Theory of Communication. The University of Illinois Press , Urbana. 125 pages.

Shiel, R.J.; Green, J.D. and Nielsen, D.L. 1998. Floodplain bio-diversity: why are there so many species? Hydrobiologia 388: 39-46.

Sinha, R.K. 1997. Status and conservation of Ganges River dolphin in Bhagirathi-Hooghly river system in India. International Journal of Ecology and Environmental Science 23: 343-355

Sparks, R.E. 1995. Need for ecosystem management of large rivers and their floodplains. BioScience 45: 168-182.

Spence, B.C.; Lomnicky, G.A.; Hughes, R.M. and Novitzki, R.P. 1996. An Ecosystem Approach to Salmonid Conservation. ManTech Environmental Research Services Corp., Corvallis, OR. TR-4501-96-6057.

Strayer, D.L. 2010. Alien species in fresh waters: ecological effects, interactions with other stressors, and prospects for the future. Freshwater Biology 55:152-174.

Talwar, P.K. and Jhingran, A.G. 1991. Inland Fishes of India and Adjacent Countries. Volume I and II. A.A. Balkema, Netherlands.1158 pages..

Tewari, P. 2004. A study on soil erosion in Pasighat Town (Arunachal Pradesh), India. Natural Hazards 32: 257–275.

Thoms, M.C.; Hill, S.M.; Spry, M.J.; Chen, X.Y.; Mount, T.J. and Sheldon, F. 2004. The geomorphology of the Barwon–Darling basin. Pages 68-103, In: Breckwodt, R.; Boden, R. and Andrew, J. (Editors) The Darling. Murray-Darling Basin Commission, Canberra.

Tockner, K.; Baumgartner, C.; Schiemer, F. and Ward, J.V. 2000. Biodiversity of a Danubian floodplain: structural, functional and compositional aspects. Pages 141-159, In: Gopal, B.; Junk, W.J. and Davis, J.A. (Editors) Biodiversity in Wetlands: Assessment, Function and Conservation, Volume 1. Backhuys Publishers, Leiden, the Netherlands.

Trimble, S.W. 1997. Contribution of stream channel erosion to sediment yield from an urbanizing watershed. Science 278: 1442-1444.

Turak, E. and Linke, S. 2011. Freshwater conservation planning: An introduction. Freshwater Biology 56: 1–5.

Vannote, R.L.; Minshall, G.W.; Cummins, K.W.; Sedell, J.R. and Cushing, C.E. 1980. The river continuum concept. Canadian Journal of Fisheries and Aquatic Sciences 37: 130-137.

Vijaylaxmi, C.; Rajshekhar, M. and Vijaykumar, K. 2009. Fresh-water fishes distribution and diversity status of Mullameri River, a minor tributary of Bheema River of Gulbarga District, Karnataka. International Journal of Systems Biology 2(2):1-9.

Viravong, S.; Phounsavath, S.; Photitay, C.; Solyda, P.; Sokheng, C.; Kolding, J.; Jorgensen, J.V. and Phoutavong, K. 2005. Deep Pool Survey 2003-2004. Final Report. Mekong River Commission, Cambodia. 28 pages.

Walters, D.M.; Leigh, D.S.; Freeman, M.C.; Freeman, B.J. and Pringle, C.M. 2003. Geomorphology and fish assemblages in a Piedmont river basin, U.S.A. Freshwater Biology 48: 1950-1970.

Ward, J.V.; Tockner, K. and Schiemer, F. 1999. Biodiversity of floodplain ecosystems: ecotones and connectivity. Regulated Rivers: Research and Management 15: 125-139.

Watkins, M.S.; Doherty, S. and Copp, G.H. 1997. Microhabitat use by 0+ and older fishes in a small English chalk stream. Journal of Fish Biology 50: 1010-1024.

Welcomme, R.L. 1985. River Fisheries. FAO Fisheries Technical Paper-262. FAO, Rome. 330 pages.

Williams, G.P. and Wolman, M.G. 1984. Downstream effects of dams on alluvial rivers, U.S. Geological Survey Professional Paper-1286. 61pages.

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