中国科学院生态环境研究中心城市与区域生态国家重点实验室,中国科学院生态环境研究中心城市与区域生态国家重点实验室,新疆维吾尔自治区治蝗灭鼠指挥部办公室,新疆维吾尔自治区治蝗灭鼠指挥部办公室,内蒙古锡林郭勒盟镶黄旗草原工作站,内蒙古锡林郭勒盟镶黄旗草原工作站,内蒙古太仆寺旗气象局,内蒙古太仆寺旗土壤肥料工作站
中国科学院战略生物资源科技支撑体系运行专项(野生)动物实验平台运行补助经费项目,公益性行业(农业)科研专项经费项目(No.201203041)；
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences，Beijing 100085,,Locust and Rodent Control Headerquarters of Xinjiang Uygur Autonomous Region,Xianghuangqi Grassland Station, Xilinguole district, Inner Mongolia,Xianghuangqi Grassland Station, Xilinguole district, Inner Mongolia,Taipusiqi Meteorological Bureau, Xilinguole district, Inner Mongolia,Taipusiqi Soil and Fertilizer Station, Xilinguole district, Inner Mongolia
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布氏田鼠(Lasiopodomys brandtii)在冬季会形成数量不同的越冬集群,不同大小的集群会面临着不同的捕食风险。2004年秋季在内蒙古锡林郭勒盟典型鼠害草场,采用鼠洞口数量多少作为布氏田鼠秋季集群大小的指标,分析了大鵟(Buteo hemilasius)对不同大小集群的布氏田鼠集群的捕食选择偏好。结果表明：大鵟优先选择集群数量高的布氏田鼠集群,这表明数量高的布氏田鼠集群更容易吸引猛禽类天敌的捕食,该结果可以解释布氏田鼠在秋季出现的分群行为。由于捕食风险的存在,布氏田鼠借助秋季的分群行为以降低冬季集群大小和被捕食风险,从而避免成为捕食性天敌首要攻击的目标,该结果验证了最优集群理论。
Group sizes of Lasiopodomys brandtii overwintering colonies could affect colonies’ predation risks. Using the number of barrows of Brandt’s vole colony as an indicator of family group size, we studied how group sizes of Brandt’s vole’s affect the predation preference of Buteo hemilasius’s in Xilinguole typical steppe, Inner Mongolia, in the fall of 2004. The result shows that Buteo hemilasius significantly prefers to high number of group sizes of vole’s colonies. This finding indicates that the colonies with larger size result into a higher predator risk. It explains why Brandt’s vole dispersal happened during fall, Brandt’s vole colonies choose to reduce their group sizes to avoid predation risk. Such result also supports the optimum group size theory of small mammals.
引用本文
贾举杰,李锋,倪亦非,林峻,徐云虎,贺兵,王玉梅,赵景瑞.2015.大鵟对不同数量布氏田鼠越冬洞群的选择偏好.动物学杂志,50(5):795-800.
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- 收稿日期:2015-01-10
- 最后修改日期:2015-08-10
- 录用日期:2015-08-10
- 在线发布日期: 2015-09-16
