Trial of the estimation of migration source for the long-distance migratory insects by the trace element analysis

(1)首次将活化分析方法应用于昆虫中痕量元素的鉴定。结果表明，从24种代表性元素中鉴定出了目标昆虫三带喙库蚊及其栖息地土壤共有的几种微量元素。(2)在兵库县哈里马市的大型发射光机构（SPring-8）对一只成蚊进行同步辐射，对其体内微量元素含量进行了初步分析。利用x射线荧光显微镜进行了x射线成像。这些结果更详细地揭示了成蚊体内微量元素组成的信息，并用x射线微探针扫描了成蚊体内各部位的元素分布情况。

(1) We applied the identification of the trace element by the activation analysis to the insects for the first time. The results revealed that several trace elements which are common to both a target insect, Culex tritaeniorhynchus, and soil of its habitat were identified from a total of 24 representative elements.(2) We used synchrotron radiation to an adult mosquito in large-scale emission light institution(SPring-8) in Harima, Hyogo, and carried out a preliminary experiment of analysis of trace elements contained in mosquito body. The X-ray imaging using X-ray fluorescence microscopy was also carried out. These results revealed the more detailed information of trace elements composition contained in an adult mosquito and indicated the elemental distribution in each part of the mosquito body with a scanning of X-ray microprobe.