福州国际机场蝇类密度消长观察

目的 :调查国际机场重要蝇类种群密度与季节消长。方法 :采用捕蝇笼诱捕法 ,每旬调查一次 ,开展周年季节消长观察 ,以平均诱获蝇数计算种群密度 (只 /笼 /日 )。结果 :共捕获蝇类 3科 3属 7种 ,舍蝇是当地的优势蝇种 ,占全部捕获蝇数的 5 3 .0 3 % ,其他依次为丝光绿蝇 (2 7.17% ) ,市蝇 (12 .14 % ) ,大头金蝇 (5 .72 % )。当地蝇类全年均有活动 ,于 4～ 6月出现密度高峰。全年平均密度指数 94.0 8%只 /笼 /日 ,4月份最高为 2 44 .3 8只/笼 /日 ,1月份最低为 1.2只。结论 :长乐国际机场蝇类种类简单 ,但种群密度较高 ,活动期长

A Survey of Growth and Decline of Musca Density in Fuzhou Changle Airport

Objective To investigate the growth and decline of important kinds of adult fly density in seazons in Fuzhou Changle Airport(1996.11~1997.10). Method Applying fly cage to catch flies, investigating the number and kinds of them once in ten days for one year and observating an average catching fly (number/cage/day). Results It shows that the adult flies found belonged to 3 families, 5 genera, 7 species. the ratio: Musca domestica vicina 53.03 %, the highest, a majority kind; Phaenicia sericata 27.17 %, the second; Musca sorbensta 12.14 %; Chrysomyia megacephala 5.72%. The acivity of each kind occurs all the year round, the highest density appeared between April and June. Average year density index of adult fly was 94.08 flies/cage/day, the highest 244.38 flies/cage/day in April, the lowest 1.2 flies/cage/day in January. Conclusion This investigation conclusion shows that the kinds of adult fly are of simpleness, but some kinds are of higher density and their activities last a long time.