南美白对虾卵巢结构及发育的组织学研究

HISTOLOGY OF THE OVARIAN STRUCTURE AND DEVELOPMENT OF PENAEUS VANNAMEI

本文采用组织学方法研究南美白对虾的卵巢结构及其发育 ,结果表明 :卵巢由卵巢壁、中央卵管和卵室组成 :卵巢壁由外向内分为上皮层、肌层、基膜和分化上皮四部分 ;中央卵管分化出大量卵原细胞 ;卵室内含有不同发育阶段的卵母细胞。卵巢发育具有明显的体积与色泽的变化 ,根据外部形态和内部结构 ,可将其分为增殖期、小生长期、大生长期早期、将成熟期、成熟期和恢复期六个时期。

The histological structure and development of the ovary of Penaeus vannamei was studied. The results show that the ovary consists of an ovarian wall, a central tube and a great many egg chambers of different sizes. The ovarian wall contains four parts from outside to inside:epithelium layer,muscular coats,basement membrane and differentiation epithelium. The central tube produces a great deal of oogonium and there are plenty of oocytes of different developmental stages in the egg chambers. The ovarial development cycle can be divided into six stages according to the bulk,color and structure as follows: multiplication stage,minor growth stage,major growth prostage,prematuration stage, maturation stage and recovery stage.