狍胎毛形态结构与功能的关系  

Relationship between Structure and Function of Lanugo in Roe Deer

作　　者：孙长虹[1] 张伟[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2007年第3期68-70,共3页Journal of Northeast Forestry University

基　　金：教育部科学技术研究重点项目(01065)

摘　　要：利用线性目微尺和光学显微镜测量比较了距出生还有10—15d的狍颈部、背部、腹部、臀部、后肢上部的胎毛密度、毛长度、髓质长度、毛细度、髓质细度，并对鳞片和髓质形态进行了观察，发现狍胎毛的发生具有时间和空间上的顺序性，即毛的发生从头颈部向体后扩展。不同部位胎毛密度从大到小依次为：臀部〉颈部〉背部〉腹部〉后肢上部；毛直径和髓质指数都为颈部、背部、臀部显著大于腹部、后肢上部（P〉0．05）；腹部与后肢上部胎毛髓质指数的平均值都为0．67，皮质层发达；腹部毛长度和髓质长度最长，分别为（7146．5±713．0）μm和（5150．0±652．8）μm；胎毛毛干先端鳞片类型都为扁平型。不同部位之间胎毛形态出现的功能分化，为狍出生后加强对身体的保温和对抗机械损伤做了相应准备。Seven morphological parameters of hair were observed on the lanugo of a roe deer fetus 10 to 15 days before birth by linear eyepiece micrometer and optical microscope, which include hair density, hair length, medulla length, hair diameter, medulla diameter, scale pattern, and medullar pattern. Results indicate that the development of lanugo expresses temporal and spatial sequence, namely, hair occurs from head to tail. The hair density of different parts of the fetus is in the sequence of buttock, neck, back, abdomen, top heel from high to low, and hair diameter and medulla index of neck, back, and buttocks are markedly higher than those of abdomen and top heel（p 〉 0.05 ）. The average medulla index of abdomen and top heel with developed cortical stratum are 0.67, and the hair length and medulla length of abdomen are the longest, which are （7 146.5 ±713.0） μm and（5 150.0±652.8）μm, respectively. The scale pattern of the tip of the lanugo hair shaft is in flat-shaped. The function differentiation of lanugo morphology for different parts of the fetus makes preparations for protecting abdomen and limb and preventing mechanical damage effectively after birth.

关 键 词：狍 胎毛 结构 功能 

分 类 号：Q954[生物学—动物学]