Wei Q, Li P, Psenicka M, Alavi S M Hadi, Shen L, Liu J, Peknicova J, Linhart O
Key Laboratory of Freshwater Fish Germplasm Resources and Biotechnology, Ministry of Agriculture, Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Jingzhou, China.
Theriogenology. 2007 Apr 15;67(7):1269-78. doi: 10.1016/j.theriogenology.2007.02.003. Epub 2007 Mar 9.
The Chinese sturgeon (Acipenser sinensis Gray 1835) is an endangered anadromous sturgeon inhabiting the Yangtze River in China. In this study, the ultrastructure and morphology of spermatozoa was studied using transmission and scanning electron microscopy with a cryo-holder. The spermatozoon consisted of an elongated head with a distinct acrosome and nucleus region, a midpiece and a flagellum. The mean length of the head and midpiece, the flagellum and total length of spermatozoon were 4.48, 33.3 and 37.8 microm, respectively. The nucleus was an elongated trapezoid shape with anterior (acrosome) end narrower than the posterior. Granular material and an actin filament were observed within the anterior acrosome. Three to five endonuclear canals were present. The midpiece was eudipleural along its longitudinal axis. Compared to other sturgeon species, the data from the present study suggest a more recent evolutionary linkage between Chinese sturgeon and white sturgeon (Acipenser transmontanus Richardson 1836).
中华鲟（Acipenser sinensis Gray 1835）是一种濒危的溯河洄游性鲟鱼，栖息于中国长江。在本研究中，使用配备低温样品台的透射电子显微镜和扫描电子显微镜对精子的超微结构和形态进行了研究。精子由一个细长的头部组成，头部有明显的顶体和细胞核区域、一个中段和一条鞭毛。头部和中段的平均长度、鞭毛长度以及精子的总长度分别为4.48微米、33.3微米和37.8微米。细胞核呈细长的梯形，前端（顶体）比后端窄。在前顶体内观察到颗粒物质和一条肌动蛋白丝。存在三到五条核内通道。中段沿其纵轴呈双膜结构。与其他鲟鱼物种相比，本研究的数据表明中华鲟与白鲟（Acipenser transmontanus Richardson 1836）之间存在更近的进化联系。
