蚤数量与宿主数量和气象因子的关系

根据内蒙古自治区鄂托克旗和鄂托克前旗1975一1989年长爪沙鼠密度、蚤指数监测数据和本地区气象站的，项气象因子资料，分别求出了蚤指数与鼠密度的直线和曲线的回归模型，与气象因子的最优回因子集模型和标准回归模型，给出了鼠蚤因子和气象因子间的典型棺关分析。结论：宿主数量变化导致蚤指数变化；气象因子综合影响蚤指数；相对湿度和地表温度是影响蚤数量变动的重要因子；气象因于对蚤指数的影响大于对鼠密度的影响。

ANALYSIS ON THE RELATIONS AMONG FLEA INDEX,POPULATION OF MERIONES UNGUICULATUSAND METEOROLOGICAL FACTORS

According to the population of Meriones unguiculatus, flea index and data of seven meteorological factors in Etuoke Banner and Etuokeqian Banner, Inner Mongolia Autonomous Region in 1975-1989, models of linear and curve regression between the flea index and the population of M. unguiculatus were obtained respec tively. The optimum regression subsets of multipic linear regression were conductedbetween the flea index and meteorological factors. And then, the model of standard regression was also obtained. The canonical correlation analysis explained such rela tions of the flea index and their hosts population to the meteorological factors. The conclusions are as follows: The population of M. unguiculatus was the main factoraffecting flea index. The meteorological factors exerted summing-up influence on the flea population, and yearly average relative humidity and temperature in the field were the two main factors with influence. Moreover, the flea index was influenced by the meteorological data greater than the population density of their hosts.