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| Analysis of Monitoring Result of Farmland Rodents inNanxiong City and Xinhui District, Guangdong Province |
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| DOI：10.16768/j.issn.1004-874X.2022.04.009 |
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| Abstract: |
| 【Objective】The study was carried out to understand the rodent infestation in typical farmlands and
the difference of rodent community structure in different habitats of Guangdong Province, with a view to providing basis for the prevention and control of rodents in Guangdong. 【Method】Night trapping method was used to monitor rodents for
three consecutive years at two monitoring sites: Nanxiong City in northern Guangdong and Xinhui District in Pearl River Delta.
Quantitative analysis of the rodent species composition, population size and community biomass structure was conducted. In
addition, the differences of rodent community structures in different habitats were compared.【Result】The total captured
rate in 3 years was 6.37%. A total of 836 captured individuals belonged to 5 species of rodents. Both captured number (589
individuals) and biomass (322.34 g/100 trap nights) of Rattus losea were dominant in those 5 species. The basic species
composition of rodent community in farmlands of monitoring sites was“Rattus losea + Bandicota indica + Mus caroli + Rattus
norvegicus + Rattus tanezumi”. The monthly dynamics of rodent population showed a bimodal pattern, with two peaks (in
January and November) and two valleys (in April and July) every year. The highest rodent population density season was winter,
and the average captured rate was 7.17 (±2.49)%. While the spring was the lowest rodent population density season with the
average captured rate of 4.86 (±2.21)%. The rodent population density and biomass at Nanxiong monitoring site (8.38%±5.05%,
727.92 g/100 trap nights) were significantly higher than those at Xinhui monitoring site (4.88%±4.28%, 472.52 g/100 trap
nights). There also were significant differences in species composition, population size and community biomass structure
between the two monitoring sites.【Conclusion】There are significant differences in farmland rodent population size in different
months, different seasons, and at different sites. To achieve sustainable rodent pest management under the new circumstances,
it is needed to enhance the accuracy of monitoring and early warning, and to constantly adjust the control strategies according to
the changing planting structure and habitat conditions. |
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