【摘要】 <正> 高原鼠兔(Ochtona curzoniae Hodgson)分布于我国青海、西藏、甘肃、四川西北部,以及尼泊尔、巴基斯坦东部等地。在青海的高寒草甸、草原地带为优势鼠种。它不仅破坏草场,并且是某些自然疫源疾病的宿主动物。以往,对它危害草场的方式,及其调查危害的方法作过一些工作(张荣祖、张洁1963)。至于鼠兔数量对草场的危害程度,以及它们之间关系的研究。迄今尚无报道。更多还原

【Abstract】 This paper mainly deals with the relationship between the numbers and the rate of harmed area of the plateau pika (Ochtona curzoniae Hodgson).According to data obtained from 4 habitats,the interrelation between number (x) and rate of harmed area (y) of the animal has remarkable curve correlation (η=63,r=0.88,e=1.88,t0=4.40,P<0.01).The regression equation is y=-4.51 + 6.50 log x.The changes in habitat types basically have no effect on the relation of logarithmic curve regression between number and rate of harmed area (table 2).The regression equation between the number and the grass mass is as follows: y=-115.46 + 120.68 log xThe method for calculating critical number on the basis of regression equation is submitted (table 4).By means of critical number,the efficacy of rodenticides against plateau pika is estimated (table 5).更多还原