Seasonal Observation on Some Population Attributes of Aedes albopictus Females in Nagasaki, Japan, with Emphasis on the Relation between the Body Size and the Survival.

Human bait collections of Aedes albopictus females were made 27 times from May to August, 1990 in Nagasaki, Japan. Seasonal variation was observed in the density, the body size as measured by the wing length and the parous rate of host-seeking females. Early in the observation period, generally the density was lower, the body size was larger and the parous rate was lower. However, when compared in each time period, clear positive correlation was recognized between the body size and the parous rate. It was also found that females with retained mature eggs or with heavily damaged wings had, on average, larger body size, suggesting the longer survival in larger females