Zhang H, Hu Z, Xue Z
Institute of Medicinal Plant Cultivation, Sichuan Academy of Traditional Chinese Medicine and Pharmacy, Nanchuan.
Zhongguo Zhong Yao Za Zhi. 1990 Dec;15(12):708-9, 763.
Our on-the-spot investigation has indicated that the tortoise population as natural resources has been on the decrease ever since the sixties. The reason for the decrease lies in some natural factors as well as the indiscriminate catching and killing by man. As a result, the female tortoises remarkably over whelm the male ones in number, which leads to a drop in the natural rate of breeding.
我们的实地调查表明，龟作为一种自然资源，自60年代以来数量一直在减少。减少的原因既有一些自然因素，也有人类的滥捕滥杀。结果，雌龟的数量大大超过雄龟，导致自然繁殖率下降。
