动物的性别不同,生长速度,形态、风味等亦不尽相同。出于某种需要,有时要进行雌雄鉴别。在动物的繁殖工作中更需要准确识别雌雄,以便于亲本选留,购进及组配。比如中华鳖,在正常条件下,雄鳖比同龄雌鳖的生长速度要高出10～20％,多养雄鳖能显著提高经济效益。但中华鳖在繁殖配组时,雌雄比 Different animal species, growth rate, morphology, flavor, etc. are not the same. For some needs, sometimes male and female identification. In the breeding of animals more need to accurately identify male and female, in order to facilitate selection of the parent, purchase and assembly. Such as Chinese soft-shelled turtle, under normal conditions, the male turtle than the same age female turtle growth rate should be 10 to 20% higher, more support male turtle can significantly improve economic efficiency. However, turtle breeding in the group, the ratio of male and female