Morphological and histological studies on the ovary development in Parapenaeopsis hardwickii

This paper deals with the morphologic and histological studies on the ovary of Parapenaeopsis hardwickii. According to its morphologic and histological characters, the development of the ovary was divided into six phases as follows: forming phase, small developing phase, great developing preliminary phase, great developing anaphase, ripe phase and recovery phase. The period of the ovary development in Zhejiang sea area is one year. The female spawns from May to September, and the peak is June to July. The type of spawn is several times.