Abstract: Musk deer were first translocated to Chongming Island , Shanghai , in 1980s. After nearly 20 years , we evaluated the population characteristics of musk deer on Chongming Island , and we also quantified fawns mortality. There were 74 fawns born from 1998-2000. Adult deer being reproductive comprised about 51.1 % of population. The age structure suggested an increasing population. The survivorship curve indicates that the most death happened in fawn period. Sex ratio data suggested male-biased mortality during fawn period. Annual survival of female fawns exceeded survival of males ( P < 0.05) , which resulted in femalebiased sex ratios in adult. Early-born fawns experienced higher survival than late-born ones (P < 0.05). Diseases were the most important factor in causing fawn death (45.9 %) .

Key words: Musk deer (Moshus moschiferus), Population structure, Survival of fawn

摘要： 对饲养在上海崇明岛东平林场的林麝种群特征以及1998～2000 年间该种群所出生的74 只幼麝存活情况进行分析研究。结果表明: 该林麝种群中能繁殖的个体占51.1 % , 种群数量逐渐增长。种群存活率曲线呈C 型,说明林麝的死亡主要发生在幼麝时期。从不同年龄段性比变化来看, 初生幼麝的性比接近1∶1 , 由于雌幼麝比雄幼麝具有更高的存活率( P < 0.05) , 进入亚成体以后雄性比例逐渐下降, 显示幼麝时期存在偏雄性死亡。早出生幼麝的存活率明显高于晚出生幼麝( P < 0.05) 。引起幼麝死亡的主要原因是疾病(45. 9 %) 。

关键词: 林麝, 种群结构, 幼麝存活率