e L.terrestris surface ac-
tivity,usually last from November to April in Jokioinen.Therefore,
the period between autum nand spring equinoxes(22e23Sepand
19e21March)with short day sand long darkperiods,cannot
effectively compen sate forlimited summeractivity.This pattern
may,however,be changing with the increasingly warm winter
month spredic tedby climate changes cenarios fornor thern Scan-
dinavia