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Relationships among rat numbers,abundance of oil palm fruit and damage levels to fruit in an oil palm plantation

Integrative Zoology 2011年第2期6卷 130-139页

作者： Chong Leong PUAN Anne W.GOLDIZEN Mohamed ZAKARIA Mohd N.HAFIDZI Greg S.BAXTER Faculty of Forestry Putra UniversityMalaysia University of Queensland School of Integrative SystemsGattonQueenslandAustralia University of Queensland School of Biological SciencesSt LuciaQueenslandAustralia Faculty of Agriculture Putra UniversityMalaysia University of Queensland School of GeographyPlanning and Environmental ManagementSt LuciaQueenslandAustralia

The relationships between vertebrate pests and crop damage are often complex and difficult to *** palm oil plantations rodents remain the major pests,causing substantial monetary *** present study examined the numerical and functional responses of rodents to changes in the availability of oil palm fruit and the damage associated with that *** the study,200 traps were set in pairs on a 10×10 trapping grid for 3 consecutive nights in each of 6 study plots at 8-week intervals in a 2569 ha oil palm plantation at Labu,Negeri Sembilan state in Peninsular Malaysia over 14 months.A total of 1292 individual rats were captured over 25200 *** were identified,aged,sexed,weighed and *** index of the relative abundance of rats was calculated based on trapping *** to infructescences was assessed at each trap *** of the age of palms,there were positive and significant relationships between the relative abundance of rats and numbers of *** levels of damage to infructescences were significantly correlated with the relative abundance of rats.A steep increase in damage was observed with an increase in mature infructescences,indicating a feeding preference of rats for mature *** both males and females of all rat species,there were weak and non-significant correlations between body condition and infructescence *** results indicated that there was a numerical and a functional response by rats to the availability of palm fruit and a resulting increase in depredation of oil palm *** ways in which this information might aid in future pest control are discussed.

关键词： body condition index fruit damage numerical response oil palms rodent pest

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