The stadium effect:rodent damage patterns in rice fields explored using giving-up densities  

作　　者：Clare R.JONES Renee P.LORICA James M.VILLEGAS Angelee F.RAMAL Finbarr G.HORGAN Grant R.SINGLETON Alexander M.STUART 

机构地区：[1]Crop and Environmental Sciences Division,International Rice Research Institute,Metro Manila,Philippines [2]Natural Resources Institute,University of Greenwich,Chatham Maritime,Kent,UK [3]Centre for Compassionate Conservation,University of Technology Sydney,New South Wales,Australia

出　　处：《Integrative Zoology》2017年第6期438-445,共8页整合动物学（英文版）

基　　金：supported by funding provided to the In­ternational Rice Research Institute by the Swiss Agen­cy for Development and Cooperation for the CORIGAP project(Grant no.81016734);the Philippines De­partment of Agriculture-Bureau of Agricultural Devel­opment(DA-BAR).

摘　　要：Rodents are globally important pre-harvest pests of rice.In Southeast Asia,rodent damage to growing rice crops is commonly concentrated towards the center of rice fields,away from the field edge,resulting in a clear pat­tern known as the“stadium effect.”To further understand this behavior of rodent pests and to develop recom­mendations for future research and management,we examined the relation between giving-up densities(GUDs)and damage patterns.In Tanay,Luzon,Philippines,GUD trays containing pieces of coconut in a matrix of sand were placed at 4 different distances from the field edge to quantify the perceived risk of predation in a rice field pest,Rattus tanezumi.GUDs were recorded during a dry and wet season crop at the reproductive and ripening stages of rice.In addition,assessments of active burrows,tracking tile activity and rodent damage to the rice crop,were conducted in the dry season.GUDs were significantly lower in the center of the rice fields than on the field edges,suggesting that rodent damage to rice is greater in the middle of rice fields due to a lower per­ceived predation risk.Furthermore,this perception of predation risk(or fear)increases towards the field edge and was greatest on the rice bund,where there was no vegetation cover.We discuss the implications for rodent management and rodent damage assessments in rice fields.This is the first documented use of GUDs in a rice agro-ecosystem in Asia;thus we identify the challenges and lessons learned through this process.

关 键 词：habitat use landscape of fear pest management Rattus tanezumi rodent behavior 

分 类 号：S51[农业科学—作物学]