CLIMATE WARMING LEADS TO INCREASE IN THE NUMBER OF SHORE ROOKERIES OF BAIKAL SEAL (PUSA SIBIRICA GM.)

Е.А. Петров, А.Б. Купчинский, М.Е. Овдин, А.В. Шаблов

Abstract


To find out whether the Baikal seal Pusa sibirica Gm. uses coastal rookeries located outside of Ushkany Islands, we surveyed in 2024 the shores of Lake Baikal using unmanned aerial vehicles (UAV). We recorded previously undescribed locations of coastal rookeries on Sviatoy Nos Peninsula, on the eastern side of Olkhon Island, and on three islands in Maloye More Strait. At the time of the survey, the number of seals at these rookeries amounted to 7 thousand individuals.  Therefore, this biotope is highly important for Baikal seal. Using camera traps installed on Sviatoy Nos Peninsula, we showed that one of the newly discovered rookeries functioned throughout the summer. The dynamics of animal counts at the rookery and the 24-h activity of seals are reported. It is supposed that the newly discovered locations of coastal rookeries were used by Baikal seals decades ago, and later their role came to naught. However, due to the changes in ice regimen caused by global warming, the number of seals experiencing a physiological need to stay in coastal conditions increased significantly. This has led to the revival of many coastal rookeries, primarily those not experiencing critical anthropogenic influence.


Keywords


байкальская нерпа, ледовый режим, Байкал, потепление, береговые лежбища, антропогенное влияние


Как процитировать материал

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DOI: http://dx.doi.org/10.24855/biosfera.v17i1.969

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