树鼩(Tupaia belangeri chinensis)生长发育的初步观察  

STUDIES OF ONTOGENY IN THE TREE SHREWS(TUPAIA BELANGERI CH1NENSIS)

作　　者：邹如金[1] 季维智[1] 沙临力 严晔[1] 杨克勤 Zou Rujin;Ji Weizhi;Sha Linli;Yan Ye;Yang Keqin(Kunming Institute of Zoology,Academia Sinica)

机构地区：[1]中国科学院昆明动物研究所

出　　处：《Zoological Research》1987年第2期201-208,共8页动物学研究（英文）

摘　　要：本文对39只树鼩的个体生长发育作了描述。新生幼仔生长发育迅速,在出生后头一个月内,体重可增长3—6倍,其体重的增长与饮奶量有关。出生后4个月性成熟,7个月龄时可繁殖产仔。性器官的重量有明显的季节性变化,1—6月间睾丸、子宫、卵巢重量最大,性行为活跃,其余月份重量下降,性功能出现渐进性衰退。辜丸重和体重的比值小于0.01,表明树鼩是单雄交配繁殖。乳齿的萌发为下颚先于上颚,门齿最先萌发,其次是犬齿,前臼齿,最后是臼齿。与Lyon(1913)和Shigehara(1980)提出的恒齿萌发次序不同。This paper described the ontogeny of 39 young tree shrews.The growth of newborn is very rapid,within the first month,the body weight of newborn is increased by 3-6 times and the growth of body weight is relative to quantity of sucked milk.Sexual maturation is at fourth month after birth and the first parturition occurs at the age of 7 months.Obvious seasonal changes of the weights of the sexual organs are observed.Between January and June,the weights of the sexual organs are maximal and sexual action is the most active.In the other months the weights of sexual organs become lower and a progressive regression of sexual function occurred.Ratio of testis weights and body weight(<0.01)showed that tree threws belong to single-male mating system.The eruptive sequence of milk teeth in the lower jaw precedes those in the upper jaw,incisors erupts the first,then followed by canines,premolars,and molars the last.The sequence of eruption of milk teeth is different from the eruptive sequence of permanent teeth described by Lyon(1913)and Shigehara(1980)

关 键 词：树鼩 生长发育 新生儿 性成熟 单雄交配 乳齿 萌发次序 

分 类 号：S82[农业科学—畜牧学]