Comparative Study on Population Characteristics of Rattus norvegicus and Rattus tanezumi: A Case Study of Sandu County, Guizhou Province

AIZhenxian, BAIMingqiong

Journal of Agriculture ›› 2026, Vol. 16 ›› Issue (5) : 26-31.

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Journal of Agriculture ›› 2026, Vol. 16 ›› Issue (5) : 26-31. DOI: 10.11923/j.issn.2095-4050.cjas2025-0033

Comparative Study on Population Characteristics of Rattus norvegicus and Rattus tanezumi: A Case Study of Sandu County, Guizhou Province

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Abstract

The study aims to compare the population characteristics of Rattus norvegicus and Rattus tanezumi, and provide theoretical basis for their population prediction and scientific prevention and control. In the first half of every month, the rat situation in residential areas, paddy fields and dry farming areas was investigated by night trapping method, and the rat situation of R. norvegicus and R. tanezumi in agricultural areas of Sandu County, Guizhou Province from 2012 to 2024 was compared and analyzed. The results showed that the average weight of R. norvegicus was (98.95±42.37) g, while that of R. tanezumi was (84.95±31.95) g. The weight, carcass weight and body length of R. norvegicus were significantly higher than that of R. tanezumi. The average capture rate of R. norvegicus was 1.17%, which was significantly higher than that of R. tanezumi (0.37%). R. norvegicus had three population peaks in March, June and September, and R. tanezumi had two population peaks in March and June. The reproductive ability of R. norvegicus and R. tanezumi was different in the local area. The average pregnancy rate of R. norvegicus was 15.69%, which was lower than that of R. tanezumi by 23.57%. The average number of offspring of R. norvegicus was 7.89, which was higher than that of R. tanezumi by 5.88. The average testicular decline rate of R. norvegicus was 51.52%, which was lower than that of R. tanezumi by 59.04%. The average fatness of R. norvegicus was 2.65±0.40 g/cm3, which was lower than that of R. tanezumi (2.78±0.45) g/cm3. It can be seen that the morphological characteristics of body weight, body length, tail length and ear height can be used as a reference for identifying and distinguishing R. norvegicus and R. tanezumi, and March, June and September are the key periods for the control of R. norvegicus and Rattus flavipectus.

Key words

Rattus norvegicus / Rattus tanezumi / morphological characteristics / reproductive parameters / fatness / compare

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AI Zhenxian , BAI Mingqiong. Comparative Study on Population Characteristics of Rattus norvegicus and Rattus tanezumi: A Case Study of Sandu County, Guizhou Province[J]. Journal of Agriculture. 2026, 16(5): 26-31 https://doi.org/10.11923/j.issn.2095-4050.cjas2025-0033

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