In the stage of field population study, most study focus on the congregation and immigration of insect population, the investigation of natural population quantity.
在田间种群研究阶段，主要进行种群聚集与扩散迁移的研究和自然种群的数量调查。
The object of investigating wild life quantity and the main investigation methods used at home and abroad and their development trend were estimated in this paper.
从论述野生动物数量调查的目的意义开始，对国内外常用的野生动物数量调查的主要方法和发展趋势进行了综合性评述。
Adopting the research method, which combines investigation with research, qualitative analysis with quantity analysis and theory practice.
本论文采用了调查与研究，定性分析与定量分析相结合，理论性与实践性相结合的研究办法。
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