Immergence

For a given species, the length of the active season (emergence from hibernation to immergence in hibernation) varies little among geographic populations, but the timing of emergence and immergence may vary widely.

Moreover, it requires a thorough-going immergence within it. However, in this immergence, the horizon of milieux, ungoverned and impertinent to this contexture, is always possibly visible. Freedom in this contexture consists in the possibility to ...

One possible relationship is that body mass or loss of mass during the hibernation period (the difference between immergence mass and emergence mass) is related to the length of the hibernation period.