Journal
JOURNAL OF MEDICAL ENTOMOLOGY
Volume 37, Issue 2, Pages 205-209Publisher
ENTOMOL SOC AMER
DOI: 10.1603/0022-2585-37.2.205
Keywords
Forcipomyia taiwana; distribution; population abundance; temperature; rainfall
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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.
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