关键词: 齐口裂腹鱼, 卵巢, 组织学, 产卵类型

Abstract: By using the routine method of wax section and scanning electron microscope, the development of the ovary of Schizothorax prenanti was studied.The results show that the development of ovary is com posed of Ⅵ stages and the oogenesis consists of 5 phases.In the phase 2 of oocyte development, the yolk nucleus, transparent layer around nucleus, and nucleolar bodies extruding into cytoplasm can be seen.The content of vesicles and yolk morphology present different forms.With the grow th of oocytes, the nucleolar number is greatly increased.The oocyte membrane consists of two layers:plasmalemma and zona radiate.The micropyle of the matured oocyte in the phase 5 was blocked up by the micropyle cells.The spaw ning season extends from late February to late August.The pattern of spaw ning can be classified as partial synchronic one.

Key words: Schizothorax prenanti, ovary, histology, spawning pattern