| 摘要: |
| 【目的】研究阿拉善荒漠区小毛足鼠的繁殖特征及其对种群的调节作用。【方法】于2006-2011年每年4、7、10月上旬，采用铗日法，对内蒙古阿拉善荒漠区小毛足鼠种群数量及繁殖特征进行了调查。【结果】调查期间，在该研究区共捕获小毛足鼠502只，其中雌性253只，雄性249只，其平均雌雄性比为1.02±0.22、平均怀孕率为（37.63±14.70）%、平均胎仔数为（5.64±1.58）只、平均睾丸下降率为（63.07±34.29）%、平均繁殖指数为0.77±0.17。小毛足鼠捕获数量与平均雌雄性比呈极显著正相关(r=0.99，P<0.01)，与平均睾丸下降率呈显著正相关(r=0.94，P<0.05)。【结论】在阿拉善荒漠区小毛足鼠的繁殖特征参数中，雌雄性比和雄性睾丸下降率对其种群调节起重要作用。 |
| 关键词: 小毛足鼠 种群 繁殖特征 阿拉善荒漠区 |
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| 基金项目:国家自然科学基金项目（30760044，31160096）；公益性行业(农业)科研专项（201203041） |
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| Population and reproductive characteristics of desert hamster in the Alashan Desert |
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CHA Mu-ha,A Li Gu-en,YUAN Shuai,et al
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| Abstract: |
| 【Objective】The research studied the reproductive characteristics of desert hamster and its adjustment effects on population.【Method】From 2006 to 2011,in the first ten days of April,July and October,the population and reproductive characteristics of desert hamster were studied in Alashan Desert by trap-day method.【Result】During the investigation period,a total of 502 individuals were captured in the study area,among which 253 were female and 249 were male with a mean sex ratio of 1.02±0.22.The mean pregnancy rate was (37.63±14.70)%,the mean number of fetus was 5.64±1.58,the mean testicular descent rate was (63.07±34.29)%,and the mean reproductive index was 0.77±0.17.Population quantity was very significantly correlated with mean sex ratio in this study area (P<0.01),and significantly correlated with the testicular descent rate (P<0.05).【Conclusion】Sex ratio and the testicular descent rate were the most important factors which have effect on desert hamster population density in Alashan Desert. |
| Key words: desert hamster population reproductive characteristics Alashan Desert |
