乌龟年龄的鉴定方法

Study on the Age Distinguishing Methods of Chinemys reevsii

以档案年龄乌龟为材料，取其背甲、腹甲、颈椎骨、肩带等，以掌握乌龟年龄鉴定的方法．结果表明，乌龟背甲上有与年龄相关的轮纹：生长期形成的宽而疏松的环带、冬眠期产生的致密窄圈；腹甲的角质盾上在冬眠期也产生一条致密的“∠”形纹．但颈椎骨。

As a poikilothermat, Chinemys reevsii has the characteristic of growth ring.There are some structure that can demonstrate age.There are lines related to age on the curvature of the spinal column:In one year,forms a wide、loose ring and a compact cirde.There are some “∠”lines on the tortois plastron.But has no growth ring on cervical vertebra or shoulder belt.