观察·游戏·学习——记动物园夏令营一日游

青少年对自然界充满了好奇,动物园是他们百去不厌的地方。上海动物园每年都要接待15万以上的学生。散客中,孩子也是家长来动物园的源动力。虽然处于信息时     

笼养红斑羚生态生物学的初步观察

This study presents the results of a demographic analysis of 20 years of birth and death records of red gorals kept at the Shanghai Zoo.The age of the first successful breeding,sex ratio at birth,seasonality of reproduction and mortality rate are presented.The females or males of red goral born in captivity can give their first birth at the age of 2 or 3 separately.The births mainly occurred from May to July and peaked in June.Ratio of females to males at birth was 2.36:1.1 The mortality rate for infants and adults were 23.1% and 11.8%,respectively while there was no sub-adult death recorded during the 20 years period.There was a definite relation between mortality rate and seasons and mainly in July.