【摘要】 2003年5—7月、2004年5月和2005年7—8月,在内蒙古东部草原收集沙狐(Vulpes corsac)粪便148份(N03=46、N04=61、N05=41),采用频率法、相对剩余物干质量法,并以捕食痕迹和剩余物为辅助手段,对沙狐食性进行了定性及定量研究。结果表明:沙狐以啮齿类动物为主要食物,鸟类和昆虫次之。啮齿类食物组分中,达乌尔黄鼠(Citellus dauricus)、黑线仓鼠(Cricetulus barabensis)和布氏田鼠(Microtus brandti)在沙狐食物组分中超过50%,其它啮齿类动物:草原旱獭(Marmota sibirica)、褐家鼠(Rattus norvegicus)和跳鼠科(Dipodidae)所占比例小于25%,鸟类主要为百灵科(Alaudidae),昆虫以蝗科(Acridiidae)为主,还包括红蝽科(Pyrrhocoridae)、步甲科(Garabidae)、虎甲科(Gicindelidae)、水龟甲科(Hydrophilidae)等。沙狐食物生态位宽度随季节变化有所变化,春、夏两季节间食物组成无显著差异(P>0.05)。更多还原

【Abstract】 Qualitative and quantitative studies were performed on 148 Corsac fox feces collected on eastern prairie of Inner Mongolia in spring of 2003 and 2004 and in summer of 2005. Diet of Corsac fox was analyzed by the methods of frequency of occurrence and relative weight of remains of prey types with the help of prey tracks and remains. Results reveal that rodents are the primary diet for Corsac fox, and birds and insects take the second place. Food items of rodents contain Cricetulus barabensis, Microtus brandti, and Citellus dauricus, accounting for over 50% of the total, while others contain Marmota sibirica, Rattus norvegicus, Dipus sagitta, and Allactaga sibirica(less than 25%). The food items of bird and insect mainly contain birds of Alaudidae and insects of Acridiidae, and also include some insects of Pyrrhocoridae, Garabidae, Gicindelidae and Hydrophilidae. The food niche breadth of Corsac fox increased from 0.13 to 0.17 with seasonal change. There is no great significance in diet composition of Corsac fox between spring and summer.更多还原