关键词: 饵料消耗率, 鼠类侵害, 可行性

Abstract:

Objective　Rodent infestations in ports were assessed by comparing the consumption rates of various feed. Methods　The indoor and outdoor rodent activities at all types of institutions of the land, sea and air ports in Yancheng city were studied. The distribution tendency of positive frequencies was plotted based on the feed consumption rates to establish the indicators for rodent infestations. Results　In light of the health quarantine practices, the grading standards for assessment of rodent infestations were established according to the range of the mean positive rate, dispersion and frequency distribution theory relating to rodent activities, as follows: level Ⅰ (hazardless), with the infestation rate of 0-2%; level Ⅱ (mildly hazardous), with the infestation rate of ＞2%-10%; level Ⅲ (moderately hazardous), with the infestation rate of ＞10%-30%; and level Ⅳ (severely hazardous), with the infestation rate of ＞30%. Conclusion　The proposed grading standards for assessment of rodent infestations in ports based on the feed consumption rates may be used separately or in combination with rodent tracing methods for large?scale rodent monitoring in ports.

Key words: Feed consumption rate, Rodent infestation, Feasibility