西藏自治区境内曾经捕获褐家鼠

Distribution of Rattus norvegicus within the Tibet Autonomous Region

目的研究西藏自治区境内是否有褐家鼠分布。方法利用鼠夹法捕鼠,捕获鼠制成标本。结果 1974年7-10月在拉萨市和山南专区共捕获15种鼠,制作标本80号,其中有1只褐家鼠捕自林芝市八一镇,研究标本藏于中国农业科学院草原研究所动物标本室。该鼠为雄性,体重182g,体长195mm,尾长167mm,后足长34mm,耳长20mm,颅全长43.4mm,颅基长42.0mm,鼻骨长17.5mm,颧骨宽19.8mm,眶间宽6.7mm,后头宽18.5mm,齿隙13.9mm,上齿列长7.7mm。在喜马拉雅山南坡错那县捕获1只褐家鼠,未留标本。结论西藏林芝市及错那县分别捕获1只褐家鼠,可能有褐家鼠的分布。

Objective To determine whether there is distribution of Rattus norvegicus within the Tibet Autonomous Region.Methods Rats were captured using mice traps and made into specimens.Results From July to October,1974,15 rat species were found and 80 specimens were made in Lhasa city and Shannan mount areas.A R.norvegicus was captured in Bayi town of Linzhi city,and the specimen is deposited in the Animal Specimen Collection of the Grassland Research Institute of Chinese Academy of Agricultural Sciences.The captured rat was male,182 g in weight,195 mm in body length,167 mm in tail length,34 mm in hind foot length,20 mm in ear length,43.4 mm in skull length,42.0 mm in cranial base length,17.5 mm in nasal bone length,19.8 mm in zygomatic width,6.7 mm in inter-orbital width,18.5 mm in hind head width,13.9 mm in toothspace,and 7.7 mm in upper dentition.The other R.norvegicus was captured in Cuona county on the southern slope of the Himalayas,whereas the specimen was not retained.Conclusion R.norvegicus was found in Linzhi and Cuona county.