Distribution and seasonal occurrence of Forcipomyia taiwana (Diptera: Ceratopogonidae) in the Nantou area in Taiwan.
We studied the distribution of Forcipomyia taiwana (Shiraki) in Taiwan, and found this species almost island-wide. Midge seasonality was studied for 4 yr at 3 sites in Nantou, central Taiwan, to identify the extent and causes of midge population outbreaks. The midge population in 1995 was significantly lower than in 3 other years because several typhoons inundated breeding sites. Maximum populations of F. taiwana occurred in June, July, and August. There was a highly significant correlation between the monthly abundance of F. taiwana and temperature and rainfall. A step-up multiple regression indicated that temperature was the most important factor leading to the outbreaks of F. taiwana. Temperature increases from 15 degrees C to near 30 degrees C will increase the midge abundance.
Chuang
Y Y
YY
Department of Entomology, National Chung Hsing University, Taichung, Taiwan, Republic of China.
Lin
C S
CS
Wang
C H
CH
Yeh
C C
CC
D000818:Animals; D002519:Ceratopogonidae; D003710:Demography; D005260:Female; D012621:Seasons; D013624:Taiwan