Regulation of reproduction in a natural population of the small Japanese field mouse, Apodemus argenteus
Regulation of reproduction in a natural population of the small Japanese field mouse, Apodemus argenteus
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日本小田鼠银线姬鼠自然种群的繁殖调节
DOI：
10.3106/mammalstudy.23.19
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发表时间：
1998
期刊：
影响因子：
1
通讯作者：
K. Nakata
中科院分区：
文献类型：
--
作者：
K. Nakata
定量分析了日本小田鼠自然种群的生殖参数变化。在当年出生的个体中，性成熟时最轻的雌性重8克，最轻的雄性重10克。无论季节如何，最轻的小鼠只出现在种群增长阶段。在越冬的老鼠中，在春季种群数量下降时，雌雄老鼠中最轻的个体体重为10克。在种群密度高的年份，即使在8月份的繁殖高峰，雌性的繁殖率也低于10%。相比之下，在低密度年份，高得多的比率（超过69%）持续到10月的增加阶段。在调查期间，男性的模式与女性几乎相同。多因素分析表明，雄性的繁殖率主要受种群密度的影响（偏相关，0.732），而雌性的繁殖率主要受波动期的影响（0.848）。在低密度条件下，雌雄繁殖鼠的数量与潜在繁殖鼠的密度成正比，而在高密度条件下则依次减少。在1公顷的网格中，观察到繁殖活跃小鼠的最大数量为雄性15只，雌性21只。在繁殖季节，温度似乎没有引起任何变化。
Changes in reproductive parameters were analyzed quantitatively in a natural population of the small Japanese field mouse, Apodemus argenteus. Among individuals born in the current year, the lightest female weighed 8 g at sexual maturity and the lightest male weighed 10 g. Irrespective of season, the lightest mice were found only during the phase of population increase. Among mice that had over-wintered, the lightest individuals of each sex to reproduce during the spring population decline weighed 10 g. In years of high population density, the reproductive rates of females, even at their peak during August, was below 10%. In contrast, in low-density years, much higher rates, over 69%, lasted until October during the increase phase. The patterns for males were almost the same as those of females during survey years. According to multivariate analysis, the reproductive rate of males was largely explained by population density (partial correlation, 0.732), whereas the reproductive rate of females was largely explained by the fluctuation phase (0.848). The number of each sex to reproduce increased in proportion to the density of potentially reproductive mice at lower densities, but then decreased at higher densities. The observed maximun number of reproductively active mice was 15 males and 21 females in a one-hectare grid. Temperature appeared not to cause any variation in the breeding season in this population.