A-6 Geographical variation in autogeny and wing lengths in Aedes togoi

Abstract

In the southern part of Chiba Prefecture, we collected 24,539 ticks of 2 genera including 6 species on Sika deer Cervus nippon in October, 1990,August, 1993,and February and March, 1994. Haemaphysalis megaspinosa was the dominant species in October (92.9% of male, 89.8% of female, 91.2% of nymph), February (78.5% of male, 65.3% of female, 83.0% of nymph) and March (73.1% of male, 62.9% of female, 48.1% of nymph), but, in August H. longicornis was dominant (97.8% of male, 98.8% of female, 98.4% of nymph). Furthermore, we collected 10,928 ticks on vegetation by the flagging method in the Sika deer habitat on respective months from 1990 to 1994. The dominant species of ticks on Sika deer were approximately similar to the results of the flagging method. But, Ixodes turdus was collected only by the flagging method, and I. ovatus was collected only on deer.