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Plecotus et al. 10 (2007): 55­61 __________________________________________________________________________________

591.543.42:599.41(571.56)


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, , (60є25' .., 120є30' ..). 1987 . 5 : Myotis ikonnikovi, M. daubentonii, M. brandtii, Plecotus auritus, Eptesicus nilssonii. . , , 0.5є. 7.5­8.0 . : , , .

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1987 . 2 31 (, 1989). 2001 . 12­15 6 (. 1). 2002 . 1.5 16 ( ). 10 , 4 . ( . 2004; . 2004). ­ ­ 2006 . 5 (. 1).


Plecotus et al. 10 (2007)

57

1. , . Table 1. Species composition and numbers of the bats hibernating in Olekminsk gypseous mine. Date 03.1987* 11.1987 11.2002 03.2003 03.2004 03.2005 12.2006 12.2007 n %
* *

Myotis ikonnikovi ­ ­ ­ 1 ­ ­ 2 ­ 1 4 4.12

Myotis Myotis daubentonii brandtii ­ ­ ­ ­ ­ ­ ­ 2 1 3 3.09 ­ ­ ­ 1 ­ ­ ­ ­ ­ 1 0.97

Plecotus auritus 1 1 2 10 1 3 ­ 2 3 23 23.74

Eptesicus nilssonii 19 12 4 5 13 1 ­ 7 5 66 68.07

Total 20 13 6 17 14 4 2 11 10 97 100.00

05.2001

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. 1 . , , ­ ; ­ . Fig. 1. The temperature at hibernation sites of bats in Olekminsk mine. , , represent data of thermoresistors from the deeper abandoned parts of the mines; are data from the outward working part.


Plecotus et al. 10 (2007)

59

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.., .., .., .. 2001. ( ). ­ .: . , : 154­163. .., .., .. 2003. . ­ . . "" 3: 108­111. .., .., .. 2004. (Mammalia, Chiroptera) . ­ Plecotus et al. 7: 83­95. .., .. 1989. (Mammalia, Chiroptera) . ­ . . 63(3): 150­151. .. 1976. : . : 120­129. .., .., .. 2004. (Mammalia, Chiroptera) . ­ .: . . 15­20 . 2004 . : 196.

S

UMMARY

Anufriev A.I. 2007. Bat hibernacula in Yakutia. ­ Plecotus et al. 10: 55­61. There are few underground sites in Yakutia suitable for hibernation of bats. In 1987 hibernating bats were first found in Olekminsk gypseous mine (60є25' N, 120є30' E) on the bank of the Lena river. Total length of the mine is ca. 10 km. It consists now of the deeper


Plecotus et al. 10 (2007)

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abandoned part and the working part. The areas, which we were able to explore for bats, comprised no more than 10% of the whole area of the mine. Five bat species have been encountered: Myotis ikonnikovi, M. daubentonii, M. brandtii, Plecotus auritus, Eptesicus nilssonii. The latter two species were more frequent in the mine (Table 1). Majority of bats were observed to spend winter in the deepest areas of the mine, where the temperature remained stable all the year round at +5єC (Fig. 1, A). In the external, still working part of the mine annual temperature fluctuations reached 8єC (Fig. 1, ). We have seen only one specimen of E. nilssonii there. Longevity of hibernation period in bats under Yakutian conditions is as large as 7.5­ 8.0 months. K e y w o r d s : bats, Siberia, hibernation. : (anufry@ibpc.ysn.ru) . 677980, . , 41 Author's address: Andrei I. ANUFRIEV (anufry@ibpc.ysn.ru) Institute of Biology of the Cryolithozone, Siberian Branch of Russian Acad. Sci. prospect Lenina 41, Yakutsk 677980, Republic of Sakha (Yakutia), Russian Federation