摘要
对1986—2008年贵州省余庆、息烽、大方、三都、关岭5个县捕获的3059只褐家鼠(雌鼠1573只,雄鼠1486只)体重统计表明,褐家鼠平均体重为(108.30±49.00)g,雌、雄鼠之间体重差异不显著。根据体重的频次分配特征,参照繁殖状况,将褐家鼠划分为5个年龄组,制定了各年龄组的体重划分标准,幼年组(Ⅰ):体重小于或等于60.0g;亚成年组(Ⅱ):60.1～110.0g;成年Ⅰ组(Ⅲ):110.1～160.0g;成年Ⅱ组(Ⅳ):160.1～210.0g;老年组(Ⅴ):210.0g以上。不同年龄组种群繁殖力存在显著差异,随着种群年龄的增长,种群繁殖力不断增加,参与种群繁殖的主要群体为成年Ⅰ组、成年Ⅱ组和老年组,平均怀孕率为46.60%,平均胎仔数为7.00只,平均睾丸下降率为91.49%。种群年龄组成具有明显的季节变化特征,不同地区之间种群年龄组成变化基本一致。
We analyzed the weight of 3059 samples of Rattus norvegicus （1573 female, 1486 male） which were captured in Yuqing, Xifeng, Dafang, Sandu and Guanling County in Guizhou provience from 1986 to 2008. The average body weight was （108.30±49.00） g; there was no significant variation in weight by sex. According to the frequency distribution of weight, the Rattus norvegicus were divided into 5 age groups. The weight division standard for each age group was determined： Juvenile （≤60.0 g）, Sub-aduh （60.1-110.0 g）, Adult Ⅰ （110.1 16010g）, Adult Ⅱ （160.1-210.0 g）, Old-aduh（〉210.0 g）. There is significant variation in population reproductive capacity in different age groups. Population reproductive capacity of Rattus norvegicus would increase continuously with growth within age categories. Adult group Ⅰ, group Ⅱ and the old group were the main reproductive contributors. The research shows that the average pregnancy rate, mean litter size and average descent rate of testicle were 46.60%, 7.00and 91.49%, respectively. There is significant seasonal variation in the population age structure. The population age structure changes were almost the same.
出处
《中国农学通报》
CSCD
北大核心
2009年第14期218-223,共6页
Chinese Agricultural Science Bulletin
基金
贵州省优秀科技教育人才省长专项资金资助项目"褐家鼠
高山姬鼠监测技术研究"(黔省专合字[2007]105号)
合肥市"15851人才工程"一
二层次培养人才在研项目资助(遵市15851人才办[2008]9号)
关键词
褐家鼠
年龄鉴定
体重
划分标准
繁殖
年龄组成
Rattus norvegicus, age identification, body weight, division standard, reproduction, age structure
