To the Problem of Experimental Hibernation
I. About the Role of Endogenous Hibernation Trigger

Institute of Cryobiology and Food Technology, BG-1407 Sofia, Bulgaria


TSVETKOV, Ts., Ts. TAKEVA and A. SOLAK, 2006. To the problem of experimental hibernation I. About the role of endogenous hibernation trigger. Bulg. J. Agric. Sci, 1-5

Experimented 24 white mice (Mus Musculus), divided into 2 groups of twelve. The fist 12 animals have been injected intraperitoneal (i.p.) with blood plasma (in different doses) from ground squirrels by the time of deep hibernation. By the animals rapid decrease in body temperature has been noticed. Interesting to be outlined, by a lower temperature the hypothermic period has started earlier.
In the second group of mice injected i.p. blood plasma from summer-active ground squirrels in identical doses. The experimented mice have established no change in the body temperature. Thus stated, the possible factor causing hibernation can be found in the plasma by the time of deep winter sleep and indicates biological activity by the nonhibernating species as well.

Key words: hibernation, hibernation induced trigger, hypothermia, ground squirrel, mouse