粗糙沼虾精巢发育的组织学

利用光镜技术，对粗糙沼虾精巢发育进行了研究，根据精子发生过程中每种生殖细胞所占的比例和发生的次序，并结合精巢的形态特征，把精巢发育过程分为五个时期，即精原细胞期，精母细胞期，精细胞期，成熟精子期及退化期，精原细胞期，精巢小，透明乳白色，生精小管内的生殖细胞以精原细胞为主；精母细胞期；精巢体积增大，半透明乳白色，主要由处于初级精母细胞的次级精母细胞阶段的生殖细胞组成；精细胞期，精巢体积继续增大，颜色加深，生精小管内的生殖细胞以精细胞为主；成熟精子期，精巢体积可达最大，紫红色，生精小管内充满着成熟的精子，退化期；精巢体积减小，半透明乳白色，生精小管内的成熟精子几乎排空。

Histology of the Testis Development in Macrobrachium asperulum

Histology of the testis development of M. asperulum has been studied with light microscopy. According to the quantity and forming sequence of spermatogenetic cells, and the shape and structural characters of testis, the development of the testis can be classified into five stages: spermatogonium phase, spermatocyte phase, spermatid phase, mature sperm phase and deteriorated phase. The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia; The testis at spermatocyte phase develops, and is translucent, and the spermatogenetic cells in seminiferous tubule are primarily composed of primary spermatocytes and secondary spermatocytes. The testis at spermatid phase develops continually, and is deep in color, and the spermatogenetic cells in seminiferous tubule are primarily composed of spermatids. The testis at mature sperm phase get to the biggest in volume, and is purple, and the spermatogenetic cells in seminiferous tubule are almost composed of mature sperms. The testis at deteriorated phase reduces in volume, and is translucent, and the mature sperms in seminiferous tubule have almost been extruded.