关键词: 蝇密度, 种类构成, 季节消长, 多样性

Abstract:

Objective To analyze the species composition, seasonal variation and the diversity of fly at different habitants in Hongkou district, Shanghai from 2006 to 2010 to provide evidence for the prevention and control. Methods Cage traps with sugar and vinegar baits were used to capture flies. Quarterly analysis of biodiversity was performed from March to November each year. Results The flies in this district belonged to 10 species, 7 genera and 3 families. The highest density was noted in Musca domestica (0.62 flies per day for every cage). The density of M. domestica was increased, whereas the density of Lucilia sericata declined each year. The fly densities were 2.52, 1.91, 1.46, 1.12, and 0.70 flies per day for every cage from 2006 to 2010, respectively. The highest density was noted in late April, early May, late June and mid-July from 2006 to 2010. In July, eight species were collected at most. The species diversity index and evenness index were highest in May. Different habitats by fly density in descending in the last five years were: farm trade market ＞ residential area ＞ public green belt ＞ external environment of restaurants. The most abundant species were observed in residential areas (ten species), which had the highest species diversity index and evenness index. Conclusion The fly diversity declined year by year from 2006 to 2010, which had a peak from late April to mid-July each year. The dominant species were M. domestica and L. sericata. The population characteristics could be generally described by the species diversity index and evenness index.

Key words: Flies density, Species composition, Seasonal variation, Diversity