种群密度是种群最基本的数量特征,在农林害虫的监测和预报、渔业上捕捞强度的确定、生态环境的保护等方面,都需要测定种群的密度。高中生物教材介绍了如何运用样方法和标志重捕法调查种群密度。一、动物——标志重捕法标志重捕法是指在被调查种群的生存环境中捕获一部分个体,将这些个体标志后再放回原来的环境,经过一段时 Population density is the most basic quantitative characteristics of the population. Population density should be measured in the monitoring and forecasting of agricultural and forestry pests, the fishing intensity in fisheries and the protection of the ecological environment. High school biology textbooks describe how to use sample methods and mark-recapture methods to investigate population density. First, the animal - Marked Capture Method Marked capture method is to capture the survival of the survey population in the part of the individual, the individual signs and then put back to the original environment, after a period of time