Abstract
A survey of the seasonal movement of the population of five species of ticks lxodidae collected from both wild brown bears Ursus arctos and their habitat yeilded the following results The smallest population of ticks except winter in both areas (on both the bears and in their habitat) was found to be in August due to dormancy under high temperatures. This was in common with all the five species. Ixodes ovatus population composed of only adults in both areas changed synchronously. Haemaphysalis megaspinosa population in both areas showed a lag of one month, because of the low prevalence of nymphs on the bears. However, there was found on abundent occurrence of nymphs and larvae in the bears habitat. The other three species (H. japonica, H. flava, I. persulcatus) in both areas changed irregularly because of the differences of developmental stages of ticks which compose each population and because of the prevalence of them to bears, respectiverly.
