Diversity and environmental adaptation of functional morphology of marine mammals

在本研究中，利用CT扫描仪对海豹的前肢和后肢以及江豚的前肢进行了三维测量，以分析其运动范围。在港海豹中，观察到了宽阔的踝关节活动范围，包括外侧和内侧运动。此外，还能识别埋藏在躯干内的肩、肘关节的屈伸和前臂的旋前。在港口江豚中，前肢的运动几乎不伴随肩胛骨的运动，前臂的回旋没有得到证实。

In this study, the fore- and hindlimbs of the harbor seal and the forelimbs of the harbor porpoise were examined three dimensionally to analyze the motion range using CT scanner. In the harbor seal, the broad motion range of tarsal joint with lateral and medial motion was observed. Moreover, the flexion and extension of the shoulder and elbow joints buried within trunk and the pronation of forearm were recognized. In the harbor porpoise, the motion of forelimbs was accompanied by almost none of scapular movement, and the circumnutation of forearms was not confirmed.