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人工饲养条件下棕色田鼠繁殖和近亲回避

邰发道,王廷正,赵亚军   

  1. 陕西师范大学生命科学学院, 西安
  • 出版日期:2006-06-12 发布日期:2008-07-07

STUDY ON THE BREEDING AND INBREEDING AVOIDANCE IN MANDARIN VOLE(MICROTUS MANDARINUS

Tai Fadao,Wang Tingzheng,Zhao Yajun   

  • Online:2006-06-12 Published:2008-07-07

摘要: 对棕色田鼠在实验室的繁殖进行了研究, 通过观察阴道涂片和阴道外观发现, 成年雌性棕色田鼠在雄性的诱导下, 有明显的动情周期。妊娠期平均为21.11d , 平均产仔数为3.43只。棕色田鼠产后即可动情、交配、怀孕, 从而缩短了繁殖间隔期, 增加了繁殖强度。连续产多胎时, 第一胎的生殖间隔期较长。如果把同洞口捕捉的熟悉鼠配对和与陌生鼠配对相比较, 发现前者的生殖间隔期明显的长于后者, 而存活仔数和配种成功率明显小于后者, 说明熟悉性、亲缘识别和近亲回避也在种群繁殖中起重要作用。

关键词: 棕色田鼠, 繁殖, 近亲回避

Abstract: According to the study on the reproduction of mandarin voles aised in laboratory, the results showed that: through observing vagina smear and appearance of vagina, it is found that the adult female induced by male had obvious estrous cycle. The mean gestational period of female vole is about 21.11±0.11 days and mean litter size is 3.43 ±0.18. If several litters were continiously reproduced by adult female, mean interval between the second and first litter was longer. If the pairs that the female and male were captured in same hole were compared with pairs that the female and male were unfamiliar, we could find that the mean interval between reproductions of the former was longer than the later and the mean survival offsprings and percent of pairs producing litters were less than the later. Thus,familiarity, kin recognition and inbreedingavoidance may play important roles in vole population breeding.

Key words: Microtus mandarinus, Reproduction, Inbreeding avoidance