The aboriginal Western Siberian beaver ( Castor fiber pohlei Serebrennikov 1929) is a keystone species of protection on the territory of the Malaya Sosva State Nature Reserve and its structural subdivision, the Verkhne-Kondinsky nature reserve. Beavers are included in the Red Book of Khanty-Mansi Autonomous Okrug-Yugra (2013) and the Red Book of the Russian Federation (2021). Their conservation is possible by complex measures, including a strict protection of the territory, genetic screening, and to ensure the reliability of prospects, modeling of population dynamics. An assessment of the habitat conditions and the state of the main subpopulation in the Konda River basin was carried out. The simulation results indicate that the population has already reached the maximum size and has a minimal growth (ca. 1 per cent/year). The reasons for this situation are the almost complete population of suitable biotopes (the quality of all beaver habitats corresponds to the III class) and the lack of territories free for further settlemen
castor fiber pohlei, beaver verkhne-kondinsky nature reserve, strong protected area (spa)
1. Aleshkovskiy I.V Modelirovanie nelineynoy dinamiki global'nyh processov / red. I.A. Aleshkovskiy, I.V. Il'in, D.I. Trubeckov. M.: Izdatel'stvo Moskovskogo universiteta, 2010. 409 s.
2. Borodina M.I. Vremennaya instrukciya po uchetu chislennosti rechnogo bobra. Moskva, 1959. 20 s.
3. Vasin A.M. Bobry na severe Zapadnoy Sibiri // Trudy Volzhsko-Kamskogo gosudarstvennogo prirodnogo zapovednika, Trudy Pervogo Evro-Amerikanskogo kongressa po bobru. Kazan', 2001. S. 51-60.
4. Vasin A.M. Instrukciya po staticheskomu uchetu zapadnosibirskih rechnyh bobrov v zapovednike "Malaya Sos'va" s ohrannoy zonoy i v zakaznike "Verhne-Kondinskiy". Rukopis'. GPZ "Malaya Sos'va", 2018. 3 s.
5. Vasin A.M., Savel'ev A.P. Zapadnosibirskiy rechnoy bobr Castor fiber pohlei Serebrennikov, 1929 // Krasnaya kniga Hanty-Mansiyskogo avtonomnogo okruga - Yugry. Zhivotnye. Rasteniya. Griby. Izd. 2-e. Ekaterinburg: Basko. S. 61-62.
6. "Gosudarstvennyy prirodnyy zapovednik.,Malaya Sos'va" imeni V.V.Raevskogo" // Gosudarstvennyy prirodnyy zapovednik Malaya Sos'va. URL: https://www.m-sosva.ru/(data obrascheniya: 17.03.2022).
7. Dezhkin V.V., D'yakov Yu.V., Safonov V.G. Bobr. Moskva: Agropromizdat, 1986. 254 s.
8. D'yakov Yu.V. Bobry evropeyskoy chasti Sovetskogo Soyuza: morfologiya, ekologiya, puti i metody hoz. ispol'zovaniya. Smol. gos. ped. in-t im. Karla Marksa. Smolensk: Mosk. rabochiy. Smol. otd-nie, 1975. 480 s.
9. Krasnaya kniga Rossiyskoy Federacii. Zhivotnye. Moskva: FGBU VNII Ekologiya, 2021. 1128 s. EDN: https://elibrary.ru/SHJFFC
10. Krasnaya kniga Hanty-Mansiyskogo avtonomnogo okruga - Yugry: zhivotnye, rasteniya, griby. Izd. 2-e. Ekaterinburg: Izdatel'stvo Basko, 2013. 460 s.
11. Metodicheskie ukazaniya po uchetu rechnogo bobra na bol'shih territoriyah. M., 1986. 20 s.
12. Polushkin A.A. Vliyanie ekologicheskih faktorov na dinamiku ohranyaemoy populyacii zapadnosibirskogo bobra (Castor fiber pohlei Serebrennikov) na reke Eyt'ya (HMAO-Yugra). 2022. T. 19. № 4. S. 190-198.
13. Polushkin A.A. Letopis' prirody: Izuchenie dinamiki chislennosti zapadnosibirskoy populyacii bobra Castor fiber pohlei Serebrennikov (1929) na territorii gosudarstvennogo prirodnogo zapovednika "Malaya Sos'va" // Otv. red. D.M. Ochagov. Simferopol': Biznes-Inform, 2022.
14. Solov'ev V.A. Kolichestvennyy uchet bobra metodom izmereniya shiriny sledov rezca na drevesnyh pogryzah. 1971. T. 105. S. 110-125.
15. Frisman E.Ya., Zhdanova O.L. Rezhimy dinamiki geneticheskoy struktury i chislennosti v modelyah evolyucii lokal'noy limitirovannoy populyacii // Izvestiya vuzov. PND. 2006. T. 14. № 1. S. 98-112. EDN: https://elibrary.ru/HTITJR
16. Huang S. et al. A commentary review on the use of normalized difference vegetation index (NDVI) in the era of popular remote sensing. Journal of Forestry Research. 2021;32(1):1-6. EDN: https://elibrary.ru/LMNTKD
17. Halley D.J., Saveljev A.P., Rosell F. Population and distribution of beavers Castor fiber and Castor canadensis in Eurasia. Mammal Review. 2021;51(1):1-24. EDN: https://elibrary.ru/BHICXM
18. Land Viewer. EOS. URL: https://eos.com/landviewer/?lat=62.33415&lng=64.21165&z=11 (data obrascheniya: 06.07.2023).
19. R-ArcticNET V4.0. URL: https://www.r-arcticnet.sr.unh.edu/v4.0/index.html (data obrascheniya: 06.07.2023).
20. Munclinger P. et al. Recovery in the melting pot: complex origins and restored genetic diversity in newly established Eurasian beaver (Rodentia: Castoridae) populations. Biological Journal of the Linnean Society. Recovery in the melting pot. 2022;135(4):793-811.
21. Serebrennikov M. Review of the Beavers of the Paleorctic Region.Comptes Rendus de l'Academie des Sciences de l'USSR (Doklady Akademii nauk SSSR). 1929; 271-276.
22. Simberloff D. Flagships, umbrellas, and keystones: Is single-species management passé in the landscape era? Biological Conservation. Flagships, umbrellas, and keystones. 1998;83(3):247-257.
