摘要
对成年日本新糠虾(Neomysis japonica)雄性生殖系统的解剖特征和组织结构进行了观察,结果表明,日本新糠虾雄性生殖系统由精巢、输精管和交接器组成,整体似“n”形。精巢左右对称,由一条“n”形的精索和其外侧延伸形成的19～21个精母细胞囊及与之相连的19～21个精子细胞袋组成,精子细胞袋位于精母细胞囊背部偏外侧的位置,通过一个短窄的通道与输精管相连。输精管是一个“n”形的管子,位于精索的背面,其前段连着精巢,后段逐渐变细,直至第8胸节向腹部弯曲变得更细,随后膨大形成壶腹,壶腹向后通入交接器中并在末端膨大。交接器位于身体的腹中线附近,其壁由外层的角膜层和内层的上皮细胞层组成,具有防御和保护功能;其内的肌肉层加厚,外层为环肌层,内层为纵肌层。从精索,经精母细胞囊,到精子细胞袋依次分布着不同发育阶段的精细胞。成熟精子有头部和尾部两部分,头部较短,尾部相当长,且头尾之间有一个15°的转角。精子呈簇分布形成精子束,精子束通过精子细胞袋与输精管间的通道被输送到输精管中,并沿输精管向交接器运输。
The anatomy and histology of male reproductive system of adult Neomysis japonica was observed. The results showed that the ＂n＂-like male reproductive system of N. japonica included testis, vas deferens and penial sacculations. The symmetrical testis was composed of one ＂n＂ shape testicular cords, 19 to 21 spermatocytic sacculations and 19 to 21 spermatidic pouches.The spermatMic pouch had a dorsal and slightly more lateral position relative to the spermatocytic sacculation and connected with vas deferentia through a short, narrow duct. The vas deferentia was an ＂n＂-like tube lying dorsal to the testicular cords. Its forepart was linked with testis, and the left and right vas deferens extended and narrowed posteriorly. At the eighth segment, the vas deferens turned ventrally, narrowed to very thin canals, and then expanded to ampullas which open into penial sacs near the midline of the ventral side of the body. The wall of penial sacs included cuticle or exoskeleton and epithelium which had recovery or protection function,and the thick muscle layer contained the outer circular muscle and the inner longitudinal muscle. Germ cells gradually matured during moving from testicular cords and spermatocytic sacs to spermatidic pouches. The mature sperm had two ports： the shorter head and the longer tail, with an 15°angular juncture between them. Spermatozoa grouped into bundles which were transported into vas deferens through the duct of spermatocytic pouches and vas deferens,then into penial sacs.
出处
《动物学杂志》
CAS
CSCD
北大核心
2007年第3期90-96,共7页
Chinese Journal of Zoology
基金
江苏省滩涂生物资源与环境保护重点建设实验室开放基金(No.JLCBE052002)
上海市重点学科建设项目(No.Y1101)
上海金沙滩投资发展有限公司水生生态与环境修复项目
关键词
成年日本新糠虾
雄性生殖系统
解剖特征
组织结构
Adult Neomysis japonica
Male reproductive system
Anatomical character
Histological structure
