农田鼠类数量统计方法的研究

STUDIES ON THE METHODS OF SIZING FARMLAND RODENT POPULATIONS

目前统计大仓鼠Cricetulus triton、黑线仓鼠C.barabensis和黑线姬鼠Apodemus agrarius等地面活动的农田鼠类广泛采用夹捕法和查洞法,夹捕法又要求连续布夹三夜。本文对用一夜、连续二夜和三夜夹捕的统计结果作了对比研究,结果表明,三种夹捕方法的统计结果一致,呈极显著正相关。作者认为只用一夜捕鼠减少了工作量和样方去除效应,可在农田鼠情常规测报中代替连续三夜捕鼠法。查洞法的统计结果不能反映农田鼠类数量的季节变化,不宜在鼠情测报中使用。

Three-trap-day and Finding-hole methods are being used widely insizing farmland rodent populations.In order to establish a simple andpractical method,the writers made a comparative study on trap-daymethods and finding-hole method.The results showed: 1. Trap-day methods showed two seasonal population density peaks(one in Summer and the other in Autumn) in the annual densitycurves of Greater long-tailed hamster(Cricetulus triton),Striped hamster(C.barabensis),Striped field mouse(Apodemus agrarius) and the Mixedpopulation,which kept with the two annual productive peaks of thespecies.Finding-hole method did not reflect the density peaks of thepopulations.The writers proposed that trap-day method is suitable forsizing farmland rodent populations. 2. The correlation coefficients of the results of One-trap-day andthat of Two-and Three-trap-day methods are highly significant.Therefore One-trap-day method may be used instead of Three-trap-daymethod in sizing populations of farmland rodents,which lowers theeffects of weather and other factors and reduces the costs.