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

doi:10.11923/j.issn.2095-4050.cjas2025-0033

Abstract

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

CLC Number:

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.

Figures/Tables 6

References 24

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指标	鼠种名称	样本数/只	范围	平均值±标准差	标准误	变异系数/%	t-测验
体重/g	褐家鼠	971	16.00~305.70	98.95±42.37	1.36	42.82	t=6.15>t_0.01
体重/g	黄胸鼠	306	9.20~187.00	84.95±31.95	1.83	37.62	t=6.15>t_0.01
胴体重/g	褐家鼠	848	12.00~220.00	74.08±30.98	1.06	41.83	t=5.77>t_0.01
胴体重/g	黄胸鼠	255	15.30~136.00	63.77±22.90	1.43	35.90	t=5.77>t_0.01
体长/mm	褐家鼠	971	80.00~216.00	152.98±23.52	0.75	15.38	t=6.30>t_0.01
体长/mm	黄胸鼠	306	58.00~195.00	143.61±22.40	1.28	15.60	t=6.30>t_0.01
尾长/mm	褐家鼠	971	62.00~196.00	136.18±21.80	0.70	16.01	t=11.31>t_0.01
尾长/mm	黄胸鼠	306	75.00~208.00	154.76±25.99	1.49	16.80	t=11.31>t_0.01
后足长/mm	褐家鼠	971	14.00~40.00	30.41±3.63	0.12	11.93	t=2.03>t_0.05
后足长/mm	黄胸鼠	306	13.00~38.00	29.92±3.68	0.21	12.31	t=2.03>t_0.05
耳高/mm	褐家鼠	971	9.00~27.00	20.06±2.15	0.07	10.69	t=13.01>t_0.01
耳高/mm	黄胸鼠	306	12.00~28.00	22.57±3.15	0.18	13.96	t=13.01>t_0.01

指标	鼠种名称	样本数/只	范围	平均值±标准差	标准误	变异系数/%	t-测验
体重/g	褐家鼠	971	16.00~305.70	98.95±42.37	1.36	42.82	t=6.15>t_0.01
体重/g	黄胸鼠	306	9.20~187.00	84.95±31.95	1.83	37.62	t=6.15>t_0.01
胴体重/g	褐家鼠	848	12.00~220.00	74.08±30.98	1.06	41.83	t=5.77>t_0.01
胴体重/g	黄胸鼠	255	15.30~136.00	63.77±22.90	1.43	35.90	t=5.77>t_0.01
体长/mm	褐家鼠	971	80.00~216.00	152.98±23.52	0.75	15.38	t=6.30>t_0.01
体长/mm	黄胸鼠	306	58.00~195.00	143.61±22.40	1.28	15.60	t=6.30>t_0.01
尾长/mm	褐家鼠	971	62.00~196.00	136.18±21.80	0.70	16.01	t=11.31>t_0.01
尾长/mm	黄胸鼠	306	75.00~208.00	154.76±25.99	1.49	16.80	t=11.31>t_0.01
后足长/mm	褐家鼠	971	14.00~40.00	30.41±3.63	0.12	11.93	t=2.03>t_0.05
后足长/mm	黄胸鼠	306	13.00~38.00	29.92±3.68	0.21	12.31	t=2.03>t_0.05
耳高/mm	褐家鼠	971	9.00~27.00	20.06±2.15	0.07	10.69	t=13.01>t_0.01
耳高/mm	黄胸鼠	306	12.00~28.00	22.57±3.15	0.18	13.96	t=13.01>t_0.01

鼠种名称	样本数/只	范围/(g/cm³)	平均值±标准差	标准误	变异系数/%	t-测验
褐家鼠	971	1.23~5.19	2.65±0.40	0.01	15.20	t=4.50>t_0.01
黄胸鼠	306	1.77~4.72	2.78±0.45	0.03	16.33	t=4.50>t_0.01

鼠种名称	样本数/只	范围/(g/cm³)	平均值±标准差	标准误	变异系数/%	t-测验
褐家鼠	971	1.23~5.19	2.65±0.40	0.01	15.20	t=4.50>t_0.01
黄胸鼠	306	1.77~4.72	2.78±0.45	0.03	16.33	t=4.50>t_0.01