本项目针对食蚊鱼在我国的生物学研究欠缺和遗传背景不清的研究实际，充分利用我国幅员辽阔的地理优势，以食蚊鱼作为我国外来入侵淡水鱼类的模式物种。在我国不同经度和纬度上设置野外实地采样点，收集鱼类标本和环境特征数据，系统地研究食蚊鱼的遗传分化和生活史特征及其变化规律；结合多重尺度生态环境因子分析，研究食蚊鱼在大尺度梯度下的适应性变化；阐明食蚊鱼在我国的分布模式以及入侵历史和扩散路径。内容包括：1. 我国食蚊鱼的种类及其分布范围，2. 食蚊鱼生活史特征的梯度变化及其与环境因子的关系，3.食蚊鱼的遗传分化、入侵与扩散历史。为我国外来鱼类的预警、监测、防治与管理提供典型范例和科学依据。

Mosquito fish will be selected as a model of invasive alien species of freshwater fish in this study due to the lack of biological research and vague genetic background of mosquito fish in China. Taking full advantage of Chinese vast geographical conditions and by careful site-setting and field-sampling at large-scale longitude and latitude gradient, we will implement systematic research on the genetic differentiation, life history characteristics and variations of mosquito fish, identify how mosquito fish change adaptively at large-scale gradient based on analysis of environmental factors at multiple scales，and clarify the distribution patterns, invade trajectory and expansive track of mosquito fish in China. The main contents will be: 1) Types and distribution of mosquito fish; 2) Relationship between gradient changes of life history characteristics and environmental factors; 3) Genetic differentiation, invade trajectory and expansive track of mosquito fish. We hope that the results of this program will bring a representative example and scientific base for early warning, monitoring, prevention and management of biological invasion.