珠江三角洲黄毛鼠种群繁殖特征的研究  

Studies on the Population Reproduction Characteristics of Rattus rattoides in Pearl River Delta

作　　者：常弘[1] 余国兴[1] 

机构地区：[1]中山大学生物学系

出　　处：《生态科学》1990年第1期21-28,共8页Ecological Science

摘　　要：本文从1987年3月～1989年12月,研究了珠江三角洲虎门地区黄毛鼠种群繁殖,研究结果表明:①黄毛鼠种群性比雄性要大于雌性,但是幼年、亚成年体中雌性稍大于雄性。另外,本文还比较了不同季节的性比变化。②对于雄牲繁殖特征,本文重点研究了睾丸重量与体重的相关关系。③雌性的怀孕率最高峰期为9～10月,12月～2月怀孕率最低,可以认为是非繁殖期。本文还讨论了雌性的繁殖指数,反映种群在不同季节的繁殖强度和年度变化。The population reproduction characteristics of Rattus rattoides was studied in Pear River Delta from March, 1987 to December, 1989. Among the 3227 specimens collected, 1756 were males and 1471 were females. The data analysis from observations provided following conclusions: 1. The sex ratio of all the specimens proved that the male accounts for a larger proportion than the female. But females were more than males in the young and subadult groups. In addition, the paper dealed with the sex ratio of different seasons. 2. The male was involved in the reproductive activities throughout the year. Emphasis of the paper was laid on the correlationship between testis weight and body weight. 3. The female taked part in the reproduction in the whole year. But the peak of pregnant rate was from Septermber to October. The lowest pregnant rate was from December to February. The paper still studied the reproductive indices of the population. They showed also reasonal and annual Changes.

关 键 词：黄毛鼠 种群繁殖 怀孕率 繁殖期 睾丸重量 性比 种群特征 啮齿动物 年龄组 繁殖生态 

分 类 号：Q14[生物学—生态学]