黄鼬骨骼形态特征的研究

MORPHOLOGIC CHARACTERISTIC STUDY OF SKELETON OF MUSTELA SIBIRICA

试验利用4只雄性黄鼬,对其骨髂形态与同属动物水貂和其他食肉小型动物的不同特征进行了比较研究。 1.头骨:呈细长园柱形。平均长6.1cm平均最大直径2.55cm。颅骨约占头部2/3以上,颅腔很大,平均大、小脑腔长度分别为2.95和1.15cm。与视觉、嗅觉和听觉有关的骨髂结构即眶窝,筛骨窝和鼓泡都很发达。 2.躯干骨:颈、胸椎椎体长度相似,腰椎椎体较长,前9对肋骨为真肋,第10—13对为假肋,第14对为浮肋。肋骨与肋软骨等长,胸廊具有较大的收缩弹性, 3.四肢骨:与普通哺乳动物不同,黄鼬前肢骨细短,后肢骨粗长。后肢(肢骨带至爪端)比前肢(肩胛骨背侧缘至爪端)平均长3.1cm。后肢骨中的胫骨特别发达,平均长5.2cm,直径0.5cm。指(趾)骨中的爪不如猫,犬等动物发达。

Four male muistela sibiricas have been used in the experiment aad the study has been made of its morphologic characteristics. of skeleton and of the different characteristics of the same geuns animals like mustela vison shreber and other minor carniyora,1.Cranial bones are the morphology of long and thin cylinder. On an average, it is 6.1 cm long and its maximum diameter is 2.55 cm It covers over two thirds of head pars. Cavum cranii, is very large, and the ayerage length of its cerebral cavity is 2.95 cm and its cerebelli cavity 1.15 cm. Opticfossa, Fossa bulbi olfactorii and Bulla tympanica concerned with visual sense, smell sense and. hearing sense are all well developed,2.The corpus vertebraes of vertebrae lumbales is longer. Costae bones and catilagines costales are equal in length, Thorax posesses more systolic resilence.3.The extremities of mustela sibiricas are not the same as those of other mammals. The mustela sibiricas' extremitas throracalis, is short and thin, yet extcemitas pelvina is long and thick The latter are about 3.1 cm longer ,than the former. Tibia of extremitas pelvina is especially developed Its average length is about. 5.2 cm and the diameter is 0.5 cm.