【摘要】 采用组织学方法对人工养殖曼氏无针乌贼(Sepiella maindroni)卵子发生、卵巢发育周期进行组织学、细胞学观察。根据细胞大小、胞核形态及卵母细胞与滤泡细胞的关系,将曼氏无针乌贼卵子发生划分为卵原细胞期、卵母细胞期、成熟期和退化吸收期4个阶段,并阐述了各期卵母细胞的组织学特征。曼氏无针乌贼卵子发生过程具有种的特异性,大约孵化出膜12 d的乌贼可见有卵原细胞,此后进入增殖期。卵母细胞属于典型的滤泡型,发育过程中同时存在同步性与异同步性;卵母细胞无初级卵膜,只有次级卵膜和三级卵膜,次级卵膜由滤泡细胞分泌,三级卵膜由输卵管腺、缠卵腺以及墨囊分泌物共同构成。通过对卵巢的外观形态和组织学观察,将曼氏无针乌贼卵巢发育划分为6个时期。更多还原

【Abstract】 The oogenesis and ovarian development cycle of Sepiella maindroni,artificial breeding,were observed on histological and cytological characteristics by using routine histological techniques.According to the size of oocytes,the morphology of nucleus and the relationship between oocytes and follicle cells,the oogenesis can be divided into four stages as follows: oogonium stage,oocytes stage,maturation stage and resorbing oocytes stage.Moreover,the histological characteristics and variational disciplinarian of oocytes at each stage is described in detail.On the basis of the observation of oogenesis,the results illuminate that this cuttlefish’s oogenesis is provided with particularity.About twelve days after hatching,there is oogonium in the ovary,and then the oogonium proliferate quickly.Examined with a light microscope,the oocytes are of follicular type,and their development is not at the same developmental stage in the ovary.According to the oogenesis,the eggs have no primary membrane,there are only secondary membrane and tertiary membrane.The secondary membrane is excreted by follicle cells;and the tertiary membrane is made by the secretion of albumen gland,nidamental gland and ink sac.On the basis of the morphological characteristics and variational disciplinarian through histological observation,the process of ovarial development of breeding Sepiella maindroni can be divided into 6 stages.更多还原