论文部分内容阅读
目的 :研究灭鼠后黄毛鼠种群数量回升动态 ,为制订科学的灭鼠对策提供依据。方法 :1997～ 1998年设 3个大样区 ,每年用 0 .0 375 %杀鼠迷毒谷灭鼠 2次。灭鼠前和灭鼠后的每个月都调查黄毛鼠的种群动态。结果 :2～ 7月和 8～ 11月黄毛鼠的月均繁殖指数分别为 12 1.2 %和12 8.9%。在春种前灭鼠 ,即使灭效达 86.1%～ 92 .7% ,8月份的鼠密度便达到甚至超过灭鼠前。 8月份灭鼠时 ,若灭效在 82 .0 %以上 ,12月份的鼠密度未恢复到灭鼠前 ;如果灭效低 ,12月的鼠密度就会超过灭鼠前。结论 :灭后黄毛鼠的种群数量恢复快 ,因此每年要全面灭鼠 2次 ,且上半年和 8月份的毒谷指数要分别在 0 .5和 0 .6以上。
OBJECTIVE: To study the dynamic recovery of the population of rodent rats after rodent exacerbation, and to provide basis for establishing scientific rodent control measures. Methods: From 1997 to 1998, three large plots were set up, and rodent mice were rodentized twice daily with 0. Rhesus rat population dynamics were investigated before and after rodent control. Results: The average reproductive index of rodents in February to July and August to November were 12 1.2% and 12 8.9% respectively. Rodent control before spring, even if the killing effect of 86.1% ~ 92 .7%, in August the rat density reached or even exceeded before rodent control. In August, when rodent control was over 82.0%, the rodent densities did not recover to deluster before December; if detoxification was low, the rodent densities in December were higher than those before rodent control. Conclusions: The population of rodents recovered quickly after the extinction, so rodent mice were completely rodent twice a year, and the poison valley index in the first half and August was above 0.5 and 0.6, respectively.