摘要
对贵州省雷山县1985～2011年黑线姬鼠种群数量动态及繁殖参数变化规律分析表明:黑线姬鼠多年平均捕获率达3.15%±1.37%,全年种群数量变动曲线呈单峰型,一年内种群数量在7月出现1个数量高峰期,平均捕获率达5.34%±2.25%,不同年度、不同月份、不同季节之间种群数量存在显著差异。黑线姬鼠种群繁殖参数具有明显的季节周期性波动,主要繁殖期在4～9月,一年中在春季4～5月和秋季8～9月出现2次怀孕高峰期,多年种群总性比为0.96,平均怀孕率为38.23%,平均胎仔数为6.12只,平均繁殖指数为1.15,平均睾丸下降率为59.55%,雄鼠睾丸下降率的季节变化与雌鼠怀孕率季节变化呈同步变动趋势。不同年度、不同月份、不同季节种群繁殖参数存在一定差异。
The population dynamics and reproductive parameters of Apodemus agrarius in Leishan County,Guizhou Province were investigated from 1985 to 2011.The results showed that annual average capture rate was 3.15 ± 1.37%,the curve of annual population dynamics showed a single peak,and the peak within a year was in July with average catch rate 5.34 ± 2.25%.There was significant difference between different year,different months and different seasons.The reproductive parameters of Apodemus agrarius gave obvious seasonal cyclical fluctuations.The main breeding month was from April to September.There were two pregnancy peak from April to May and from August to September within a year.The sex ratio,average pregnancy rate,average litter size,average breeding index,and average testicular descent rate were 0.96,38.23%,6.12,1.15,and 59.55%,respectively.The seasonal changes of testicular descent rate in male and pregnancy rate in female were synchronized.There are somewhat differences in population reproductive parameters between different years,different months and different seasons.
出处
《山地农业生物学报》
2012年第1期44-49,共6页
Journal of Mountain Agriculture and Biology
基金
国家农业行业科研专项经费项目(200903004-01)
贵州省优秀科技教育人才省长专项资金资助项目[黔省专合字(2005)30号]
关键词
黑线姬鼠
种群动态
繁殖参数
变动规律
雷山县
Apodemus agrarius
population dynamics
reproductive parameters
change law
Leishan County
