鼷鹿不同部位毛显微特征研究

The Hair Microstructure Characteristic of Tragulus kanchil from Different Parts

利用扫描电镜及偏振光显微镜对鼷鹿背部、腹部、颈部、喉部、臀部、尾部6个部位毛显微结构进行观察,选用最粗处鳞片数量、横向单位长度(200μm)鳞片数量、最粗处鳞片长宽比、扁平型鳞片长宽比、杂波型鳞片占毛总长度的比值、扁平型鳞片占毛总长度的比值以及髓质指数7个形态学指标来研究鼷鹿毛的显微结构特征。结果表明:6个部位的毛鳞片类型主要为扁平型和杂波型,其中背部和腹部主要为扁平型,其余4个部位均为杂波型;6个部位的髓质花纹相似,髓质指数为70.1%~86.1%,部位间差异不显著;最粗处鳞片数量为2.47~4.28个、横向单位长度(200μm)鳞片数量为3.63~6.72个、最粗处鳞片长宽比为0.19~0.34、扁平型鳞片长宽比为0.19~0.34。以上几个指标在6个部位间均存在或多或少的差异,因此在利用毛形态特征对物种进行鉴定时,要明确毛样的来源部位。

A study of the hair microstructure from the back,the abdomen,the neck,the throat,the hip and the tail of the Tragulus kanchil was conducted by Scanning Electronic Microscope and Polarized Optial Microscope,we selected 7 morphology indices including scales number from the thickest part of hairs,scales number from the lateral per unit length(200μm)of hairs,length-width ratio of scales from the thickest part of hairs,length-width ratio of scales from the flat scale,the ratio of the irregular wave type to the total length of the hair,the ratio of the flat scale to the total length of the hair and medullary index in order to research the microstructure of the mouse deer’hair.The result showed that the scale types were mainly irregular wave type and flat type from 6 parts,in which the back and abdomen were mainly flat,and the other 4 were irregular wave type.The medullary was not distinct difference,and the medullary index ranged from 70.1%to 86.1%,the medullary index was not a significant difference among 6 parts,scales number from the thickest part of hairs ranged from 2.47 to 4.28,scales number from the lateral per unit length(200μm)of hairs ranged from 3.63 to 6.72,length-width ratio of scales from the thickest part of hairs ranged from 0.19 to 0.34,length-width ratio of the flat scale ranged from 0.19 to 0.34.There are more or less differences between the above indicators in the 6 parts.Therefore,we must determine the source of the sample when we identify species by morphological characteristics.