Rosneft Continues Research on Valuable Fish Species in Taymyr

Supported by Rosneft, a scientific expedition studying precious fish species in the Yenisey River has set sail from the Port of Dudinka. The research will mark the conclusion of the fieldwork carried out under the Company's Tamura corporate environmental programme.

The Tamura project was launched in 2024 and is scheduled to run until 2027. Scientists are studying the Kara subpopulation of polar bears, wild reindeer and valuable species of birds and fish in western Taymyr. The data collected will help update information on the condition of key fauna species in the Far North.

The Taimyr Peninsula expedition assembled leading researchers from the Lomonosov Moscow State University Centre for Marine Research, the Murmansk Marine Biological Institute of the Russian Academy of Sciences, and Rosneft's Arctic Research Centre.

The primary objective of the new expedition is to study the present state of the Yenisey River estuary's ichthyofauna during the summer period, along with its food base—phyto- and zooplankton communities, as well as macrozoobenthos. Specialists will conduct a biological assessment of the Yenisey’s most widespread and precious fish species, including muksun, whitefish, and omul. Key size and weight indicators, as well as feeding characteristics, will be determined for each species. This data will make it possible to evaluate the condition of the fish during their feeding migrations, assess their habitat conditions, and significantly complement the findings obtained during the 2025 studies.

Following the completion of the field stage, the collected materials will be sent to specialised laboratories for desk study and data analysis. To evaluate the species composition of the fish, molecular genetic testing of water samples will be conducted.

The initial stage of work studying the Yenisey River's precious fish species in 2025 comprised a comprehensive suite of research, including an assessment of the population status of the most precious fish species and the environmental conditions of their habitats, but during the autumn period. Scientists covered over 600 km of the Yenisey estuary, including its most vital and major tributaries—the Bolshaya Kheta, Pelyatka, Dudinka, Tanalau, and Muksunikha rivers. A biological analysis of the fish was performed in an on-board laboratory. Research locations were selected following a review of ichthyological and hydrobiological studies published over the past 90 years.

Rosneft pays special attention to biodiversity conservation, implementing the most extensive Arctic research programme since Soviet times. Since 2012, more than 60 expeditions have been conducted, during which scientists have studied the hydrometeorological, geological, and biological features of the region. It has been the source of a unique body of information on Arctic climate, nature and wildlife.

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Rosneft
June 30, 2026