The hosts were captured by traps. The sucking lice on the body surface of small mammals were all collected.
调查中用鼠笼加食饵诱捕小兽宿主，用全捕法采集其体表的全部吸虱。A three-species ratio-dependent predator-prey model with time delays is investigated, conditions are given for persistence of the system.
研究了一类具有时滞的基于比率型三种群捕食者-食饵系统，给出了系统持续生存的条件。A delayed predator-prey system with periodic coefficients and with ratio-dependence in patchy environments is considered.
考虑了斑块环境下具比例依赖的周期捕食-食饵时滞模型。A prey-predator system model with sexual favoritism is considered, and a sufficient condition of uniform persistence is given out.
讨论了一个具有性别偏食的食饵捕食系统，得出了系统灭绝和一致持久的充分条件。A stage-structured delayed predator-prey model with impulsive stocking on prey and continuous harvesting on predator is investigated.
研究了一个捕食者具连续收获与食饵具脉冲存放的阶段结构时滞捕食-食饵模型。For ecological protection, you can adjust the time delay to ensure that predators prey species continue to achieve a permanent deposit.
对于生态保护中，可以通过调节时滞，使捕食者和食饵种群达到永久续存。The dynamical behaviour of nonautonomous predator-prey system with impulsive effect is discussed.
讨论了一类具有脉冲效应的非自治捕食者-食饵系统的动力学行为。The predator-prey model whose predator's density interference term's coefficient is related with prey is investigated.
研究了一类捕食-食饵模型，其中捕食者的密度干扰项的系数与食饵密度有关。Finally the sufficient condition for the impermanence of prey population was given.
给出食饵种群的非永久持久性的充分条件。