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ICAR-CIFRI conducted river sampling in the Teesta and Rangeet Rivers of Sikkim from 22 to 28 May 2025

02 ^nd June, 2025
The ICAR-CIFRI, Barrackpore, in collaboration with the Department of Fisheries, Government of Sikkim, conducted a river sampling programme in the districts of Gangtok, Pakyong, and Namchi from May 22 to May 28, 2025. The sampling occurred in ecologically significant sections of the Teesta and Rangeet rivers, with the objective of evaluating fish diversity, water quality, and the overall health of these riverine ecosystems. The survey was conducted under the direction of Dr. B. K. Das the Director of ICAR-CIFRI, with support from the Secretary of the Department of Fisheries, Government of Sikkim, as well as departmental officials and field staff.

The sampling concentrated on the Teesta and Rangeet rivers, which are significant river systems in the state. A total of 10 selected stretches of the Teesta and Rangeet Rivers in the Gangtok, Pakyong, and Namchi districts were surveyed for fish biodiversity, water quality monitoring, and habitat evaluation. Experimental fishing was conducted using gill nets and hook-and-line methods. Water quality was assessed with portable testing kits, and sampling locations were geo-tagged. A seasonal fishing ban is currently enforced in Sikkim to safeguard fish during their breeding period. However, the Department of Fisheries has authorised and facilitated experimental fishing for scientific purposes to aid in this essential ecological assessment.
Throughout the week-long survey periods, indigenous fish species, including Neolissochilus hexagonolepis, Schizothorax sp., Garra sp., Glyptothorax sp., and Tor putitora were documented, with all live specimens subsequently released into their respective systems after documentation. Community engagement involved interactions with local fishers to assess fishing practices, stock trends, and conservation requirements. Preliminary observations indicate that water quality in upstream stretches is suitable for aquatic life. Habitat stress was observed in downstream regions as a result of urban pressure and siltation. Local fishers have indicated a decrease in fish catches, underscoring the necessity for sustainable management and restocking initiatives.

This initiative highlights the significance of scientific monitoring of river systems in hilly areas and advocates for sustainable inland fisheries in Sikkim. The collaboration between ICAR-CIFRI and the Department of Fisheries, Sikkim, demonstrates a mutual dedication to maintaining the ecological integrity of the state's important aquatic resources. The field survey was conducted by Dr. Niti Sharma, Scientist; Dr. S.C.S. Das, Senior Scientist; Dr. Dibakar Bhakta, Senior Scientist; and Mr. Bipul Das, Technical Officer, as part of the ongoing ICAR-CIFRI institutional project. The team obtained significant cooperation and logistical assistance from the officials and staff of the Department of Fisheries, Sikkim, during the sampling program.

An interactive session followed, where scientists and fisheries experts addressed queries from participants, emphasizing the role of aquarium fish keeping in education and conservation. The event concluded with the distribution of 50 aquariums along with accessories and ornamental fish to 50 schools of Dimapur, Choumoukedima and Niuland districts.