关键词: 三峡库区, 种群构成, 季节消长

Abstract:

Objective To determine the density dynamics and species composition of mosquitoes in Wanzhou agricultural areas of the Three Gorges Reservoir region, providing the basis for prevention and control of mosquito-borne diseases and mosquito hazard prediction. Methods The labor hour and light trap methods were employed to capture mosquitoes in different areas for taxonomic identification and statistical analysis. Results A total of 229 561 mosquitoes were captured using the two methods in the two years. Identification results showed that the mosquitoes were in 5 species, 4 genera, 2 subfamilies, 1 family and 1 order. The predominant species was Armigeres subalbatus, accounting for 69.80% of the total captives, followed by Culex pipiens quinquefasciatus (15.59%), Anopheles sinensis (8.56%) and Cx. tritaeniorhynchus (6.00%). The average density of adult mosquitoes in 2008 and 2009 was 247.3 and 145.8/(light·night) in residential areas, 933.5 and 1166.1/(light·night) in pigpens, and 1835.2 and 1203.3/(light·night) in cowsheds, respectively. According to the labor hour method, the average adult mosquito density was 94.03/ labor-hour in residential areas and 254.46/labor-hour in pigpens. Conclusion The density dynamics and species composition of mosquitoes obtained by the labor hour and light trap methods are the first-hand indicators of mosquitoes in Wanzhou agricultural areas and even the Yangtze River Three Gorges Reservoir region. These will be of great importance and value for the prevention and control of mosquito-borne diseases as well as vector mosquitoes in the region.

Key words: Three Gorges Reservoir region, Species composition, Seasonal dynamics