用圆形分布法探讨蝇类季节消长规律

With the Round Distribution Method to Probe the Seasonal Change of Flies

目的确定蝇类季节消长的高峰日和高峰时段。科学制定防治策略。方法用圆形分布法统计分析安阳市区2005年蝇类密度监测数据。结果安阳市区2005年蝇类密度高峰日为7月30日，高峰时段6月26日-9月2日。结论蝇类的活动高峰有明显的季节性；圆形分布法可适用于蝇类的季节消长分析。

Objective To find out the peak day and the peak periods of the seasonal change in number of flies,so as to work out a science plan for controlling and preventing flies. Methods The round distribution method was usedto analyzes the date collected in 2005 to monitor the change in numbers of flies. Results It was showed that in Anyang urban district ,the peak day of the seasonal change in flies was July 30th in 2005. The peak periods of the seasonal change in flies were from June 26th to Sep 2th in 2005. Conclusion The change in numbers of flies has an obvious seasonal feature. The round distribution method is suitable to analyzing the seasonal change in numbers of flies.