Biodiversity and Ichthyofaunal Richness of Fish Population in River Subansiri in the Downstream of the Lower Subansiri Hydro-electric Power Project Dam, Assam, India

Imran Hussain *

Department of Fisheries Resource Management, College of Fisheries, Assam Agricultural University, Raha, Assam -782103, India.

Ayub Ali

Department of Fisheries Resource Management, College of Fisheries, Assam Agricultural University, Raha, Assam -782103, India.

Imtiaz Ahmed

Department of Fisheries Resource Management, College of Fisheries, Assam Agricultural University, Raha, Assam -782103, India.

Rinku Gogoi

Department of Fisheries Resource Management, College of Fisheries, Assam Agricultural University, Raha, Assam -782103, India.

Jiten Sarma

Department of Fisheries Resource Management, College of Fisheries, Assam Agricultural University, Raha, Assam -782103, India.

Rajdeep Dutta

Department of Aquatic Environment Management, College of Fisheries, Assam Agricultural University, Raha, Assam -782103, India.

Sheetala Chintey

Department of Fisheries Resource Management, College of Fisheries, Assam Agricultural University, Raha, Assam -782103, India.

*Author to whom correspondence should be addressed.


The present study on fish diversity, assemblages, water quality and conservation status of Subansiri river, Assam was conducted for a period of one year in the mainstream. Altogether 55 fish species belonging to 42 genera, 24 families and 10 orders were recorded from the river. The largest group Cypriniformes contributed 3 families (12.50%), 15 genera (35.71%) and 20 species (36.36%). As per IUCN conservation status, 51 (92.72%) species were recorded as Least Concern, 2 (3.64%) species under near threatened, 1 (1.82%) species under vulnerable and 1 (1.82%) species under endangered category. The mean value with regard to Physico-chemical parameters of river Subansiri was moderate. The Bray-Curtis similarity prepared for river Subansiri showed the highest similarity between stations 2 and 3 in the pre-monsoon season. The CCA analysis indicates that alkalinity, TDS, temperature, conductivity, pH, dissolved oxygen, transparency and velocity are the most important parameters influencing the fish distribution and assemblage in the river.

Keywords: Diversity index, dam, water quality, cluster, CCA

How to Cite

Hussain, Imran, Ayub Ali, Imtiaz Ahmed, Rinku Gogoi, Jiten Sarma, Rajdeep Dutta, and Sheetala Chintey. 2024. “Biodiversity and Ichthyofaunal Richness of Fish Population in River Subansiri in the Downstream of the Lower Subansiri Hydro-Electric Power Project Dam, Assam, India”. Archives of Current Research International 24 (6):21-36.


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ICAR-NBFGR. Annual report 2022. ICAR- National Bureau of Fish Genetic Resources, Lucknow- 226002 (U.P.), India; 2022.

Ajibare AO, Ayeku PO, Akinola JO, Adewale AH. Plankton Composition in Relation to Water Quality in the Coastal Waters of Nigeria. Asian Journal Fish. Aqu. Res. 2019;5(2): 1-9. Available:

Parker JL, Epifanio J, Casper A, Cao Y. The effects of improved water quality on fish assemblages in a heavily modified large river system. River Research and Applications. 2016;32(5):992-1007.

Dutta R, Sarma SK. Lower Subnasiri Hydroelectric power project and future of the Subansiri river ecosystem. Annals of Biological Research. 2012;3(6):2953-2957.

Hazarika LP. Status of Resident Population of Gangetic River Dolphin, Platanista gangetica in the River Subansiri, a Tributary of Brahmaputra, Assam, India. M.Phil. Dissertation, Periyar University, India; 2008.

Talwar PK, Jhingran AG. Inland fishes of India and adjacent countries. Vols. 1 and 2, Oxford and IBH Publishing house, India. 1991;1158.


Ward JV, Stanford JA. The serial discontinuity concept of lotic ecosystems. In: Dynamics of Lotic Ecosystem, Ann Arbor Science, (Ed: Fontaine, T. D. and Bartell, S. M.). 1983;29-41

Nath P, Dey SC. Fish and Fisheries of North-East India., Vol. I. Arunachal Pradesh, Narendra Publishing House, New Delhi; 1997.

Nath P, Dey SC. Fish and Fisheries of North-Eastern India, Arunachal Pradesh,Narendra Publishing House, New Delhi; 2000.

Jayaram KC. The freshwater fishes of the Indian region. Narendra Publishing House, Delhi-110006, India. 1999;551.

Jayaram KC. The freshwater fishes of the Indian region. Second revised edition. Narendra Publishing House, New Delhi, India; 2010.

Das JN, Biswas SP. A hand book of ornamental fishes of the Brahmaputra Basin. EBH Publishers (India), Guwahati; 2008.

Phukan B, Kalita R, Kumar AP, Talukdar A, Nath BB, Das M, Tamuli KK. Directory of Indigenous Fin Fishes of Assam (First Draft). College of Fisheries, Assam Agricultural University, Raha, Nagaon-782103; 2021.

Eschmeyer WN, Fricke R, Van der Laan R. Catalog of fishes: Genera, Species; 2017.

CAMP. Report of the Workshop on Conservation, Assessment and Management Plan (CAMP) for Freshwater Fishes of India. Zoo outreach organization and NBFGR, 22-26 Sept., 1997, Luckow. 1998;156.

IUCN Red List of threatened species. 2023-24. Available:

Margalef R. Perspectives in ecological theory. University of Chicago Press, Chicago; 1968. Available:

Shannon CE. A mathematical theory of communication. Bell system technical journal. 1948;27:379-423.


Simpson EH. Measurement of diversity. Nature. 1949;163:688. DOI:

Buzas MA, Gibson TG. Species diversity: benthonic foraminifera in Western North Atlantic. Science. 1969;163:72-75.


Gurjar UR, Takar S, Bunkar, K, Mohan, D, Pandey NN. Coldwater Fish Diversity: Issues and Sustainable Management in India. In: Coldwater Fisheries and Aquaculture Management. Apple Academic Press. New York. EBook; 2023.

ISBN: 9781003369905

Bakalial B, Biswas SP, Borah S, Baruah D. Checklist of fishes of Lower Subansiri river drainage, Northeast India. Annals of Biological Research. 2014;5(2):55-67

Kaushik G, Bordoloi S. Ichthyofauna of Ranganadi River in Lakhimpur, Assam, India.The journal of biodiversity data. 2016;12:2.


Rowland J, Calvin KF. Lee, Lucie M. Bland, Emily Nicholson, Testing the performance of ecosystem indices for biodiversity monitoring. Ecological Indicators.2020;116. DOI:

Keskin C, Unsal N. The Fish Fauna of Go kceada Island, NE Aegean Sea, Turkey, Indian Journal of Zoology. 1998;65:299 – 302.


Hossain MS, Das NG, Sarkar S, Rahman MZ. Fish diversity and habitat relationship with environmental variables at Meghna river estuary, Bangladesh. Egyptian Journal of Aquatic Research. 2012;38:213-226. Available:

Ryer CH, Orth RJ. Feeding ecology of the Northern pipe fish,Symgnathus fuscus, in a Sea grass community of the lower Chesapeake bay Estuaries. 1987; 10(4):330- 336. DOI:10.2307/1351891

Sarkar T, Pal J. Studies on the diversity of fish in different reservoirs and rivers Terai region. North Bengal University Journal of Animal Sciences. 2008;2(2):83-88.

Bist B, Badoni AK, Bahuguna SN. Seasonal distribution and relative abundance of fish fauna of a small hill stream Dangchaura (Takoli) Gad, along the river Alakananda. Our Nature. 2009;7:182-186.

Mishra AR, Baniya CB. Ichthyofaunal diversity and physico-chemical factors of Melamchi river, Sindhupalchok, Nepal. Journal of Institute of Science and Technology. 2016;21(1):10-18. DOI: 10.3126/jist.v21i1.16031

James FC, McCulloch CE. Multivariate analysis in ecology and systematic: Panacea or Pandora’s box. Annu. Rev. Ecol. Syst.1990;21:129-166.

Ryan PG, Perold V. Limited dispersal of riverine litter onto nearby beaches during rainfall events. Estuarine, Coastal and Shelf Science; 2021.

DOI: 10.1016/j.ecss.2021.107186.107186

Kantharajan G, Yadav AK, Rejani Chandran, Singh RK, Mohindra VP, Krishnan, Kumar K, Shukla SP, Kuldeep K. Lal. Impact of terrestrial protected areas on the fish diversity and habitat quality: Evidence from tropical river Pranhita, India. Journal for Nature Conservation. 2022;68.


Akther KR, Hossain MA, Mian S, Chandra Roy N. Ecological Insights, and Fin Fish Diversity in Carps Spawning Grounds: Case Studies from the Surma River and Tanguar Haor, Bangladesh. Scientifica (Cairo); 2024. DOI: 10.1155/2024/7195596.

Baruah D, Hazarika LP, Dutta R. Probable Downstream Impacts of 2000 MW Lower Subansiri Dam in Arunachal Pradesh of North East India. Nature, Environment and Pollution Technology: An International Quarterly Scientific Journal,. 2009; 8(4):835:844.

Biswas, S.P. and Baruah, S. Ecology of river dolphin (Platanista gangetica) in theUpper Brahmaputra. Hydrobiologia. 2000; 430:97-111.


Central Electricity Authority. Government of India, Ministry of Power. Annual Report. New Delhi-66; 2001.

Daimari P, Choudhury M, Dutta A. Ecology and Fishery of River Subansiri (Arunachal Pradesh). Environment and Ecology. 2005;23(1):49−54.


Whitfield AK. Ichthyofaunal assemblages in estuaries: A South African case study. Reviews in Fish Biology and Fisheries. 1999;9(2):151-186.

Rodriguez MA, Lewis WM. Structure of fish assemblages along environmental gradients in floodplain lakes of the Orinicoriver. Ecological Monographs. 1987;67(1):109-128

Winemiller KO, Tarim S., David S and James BC. Fish assemblage structure in relation to environmental variation among Brazos river oxbow lakes; 2000.

Petry P, Bayley PB, Markle DF. Relationships between fish assemblages, macrophytes and environmental gradients in the Amazon river floodplain. Journal of Fish Biology. 2003;63:547-579.

Sarkar SD, Sarkar UK, Lianthuamluaia L, Ghosh BD, Roy K, Mishal P, Das BK. Pattern of the state of eutrophication in the floodplain wetlands of eastern India in context of climate change: A comparative evaluation of 27 wetlands. Environmental Monitoring Assessment. 2020;192;183.

Ghosh M, Panja S, Dutta M, Homechaudhur S. Dynamics and fisher perception of fishery exploitation in a transboundary pocket of the River Atrai, India. Fisheries Management and Ecology. 2024;00:e12705. DOI:

Jha P, Barat S. Hydrobiological study of lake Mirik in Darjeeling Himalayas. Journal of Environmental Biology. 2003;24(3):339-344

Jhingran VG. Fish and fisheries of India. Third edition. Delhi, India: HindustanPublishing Corporation; 1999.

Kansal ML, Arora S. Biodiversity and present status of freshwater fishes in Lohit river basin of India. Environmentalist. 2012;32:58-69.


Gopal B, Shilpakar R, Sharma E. Functions and services of wetlands in the Eastern Himalayas. Climate change impact and vulnerability in the Eastern Himalayas–Technical Report. In: International Center for Integrated Mountain Development (ICIMOD), Kathmandu; 2010.

Ficke AD, Myrick CA, Hansen LJ. Potential impacts of global climate change on freshwater fisheries. Reviews in Fish Biology and fisheries. 2007;17(4):581–613.

Macusi ED, Abreo NAS, Cuenca GC, Ranara CTB, Cardona LT, Andam MB, Guanzon GC, Katikiro RE, Deepananda KHMA. The potential impacts of climate change on freshwater fish, fish culture and fishing communities. Journal of Nature Studies. 2015;14(2):14–31.

Jain SK, Kumar V, Saharia M. Analysis of rainfall and temperature trends in northeast India. International Journal of Climatology. 2013;33(4):968–978

Raveendar B, Sharma AP, Gurjar UR, Gugulothu R, Mishra A. Assessment the present status of fish diversity in relation to physicochemical characteristics of Nanaksagar reservoir of Uttrakhand. Journal of Entomology and Zoology Studies. 2018;6(2):477–484

McCartney MP. Decision support systems for large dam planning and operation in Africa. International Water Management Institute, Colombo, Sri Lanka, IWMI Working. 2007;119:47.

Pathak V, Sarkar A, Mahavar LR, Bhattacharya BK. Ecological status and fish production potential of Siang, Dibang and Lohit- the three forerunners of river Brahmaputra. J. Inland Fish. Soc. India. 2001;33(2):23-28. DOI: 10.1080/14634988.2017.1297171

Singh TG, Gupta A. A preliminary assessment of water quality in Nambul river, Manipur, India. Indian Journal of Applied Research. 2015;5(7):230- 232.

Teronpi V, Singh HT, Tamuli AK, Teron R. Assessment of physico- chemical characteristics and fish diversity of hill streams in Karbi Anglong district, Assam, India. International Research Journal of Environmental Sciences. 2015;4(5): 6-11.

Hussain I, Das P, Mahajan S, Kalita P Begum M. A review on river damming in India and migratory fishes: the forthcoming aquatic tragedy. Journal of Livestock Science. 2024;15:42-45. DOI:10.33259/JLivestSci.2024.42-45.