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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (1): 189-194.

所属专题： 畜牧兽医

• 植物保护 农药 • 上一篇    下一篇

高山姬鼠种群繁殖参数的变化

杨再学1,金星2,郭永旺3,龙贵兴4,刘晋2   

  • 收稿日期:2009-07-27 修回日期:2009-08-20 出版日期:2010-01-05 发布日期:2010-01-05
  • 基金资助:

    国家“十一五”科技攻关项目资助“主要害鼠灾变规律及监控技术研究与示范”

The Changes in Population Reproductive Parameters of Apodemus chevieri

  • Received:2009-07-27 Revised:2009-08-20 Online:2010-01-05 Published:2010-01-05

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摘要：

对1996—2008年贵州省大方县高山姬鼠种群繁殖参数的变化规律研究结果表明,高山姬鼠种群繁殖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次妊娠高峰期。研究期间共解剖标本1080只, 雌鼠556只,雄鼠524只,种群性比为1.06,10年平均怀孕率为20.63%,平均胎仔数为5.92只,平均繁殖指数为0.67,平均睾丸下降率为72.05%,雄鼠睾丸下降率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。不同年龄组之间种群繁殖参数存在显著差异,随着种群年龄的增长,种群繁殖力不断增加。种群繁殖参数具有明显的地理差异。

关键词: 玉米自交系, 玉米自交系, 杂交种, 698-3, 配合力

Abstract:

From 1996 to 2008, we analyzed the change law of population reproductive parameters of Apodemus chevrieri in Dafang County, Guizhou Province. The results show that the population reproduction of Apodemus chevrieri has obvious seasonal periodic fluctuation. The main reproduction period is from April to September and the two peak of pregnancy are from April to May in spring and from August to September in autumn. During the study period, a total of 1080 specimens (556 females, 524 males) were anatomized. The population sex ratio (♀/♂), average catch rate, average Litter size, average reproductive index and average rate of scrotal testis were 1.06, 20.63%, 5.92, 0.67 and 72.05%, respectively. Seasonal changes of male rate of scrotal testis and female pregnancy rate were synchronous in trend. There is variation in population reproductive parameters in different years, month and seasons. Between different age groups, there was significant variation in population reproductive parameters. With the growth of population age, population reproductive capacity increased continuously. There was significant geography variation in population reproductive parameters.