采用常规石蜡切片,H.E染色研究了金钱鱼性腺发育及组织结构特征。结果显示,2⁺龄的金钱鱼性腺发育成熟。金钱鱼精巢为管型,可分为:精原细胞增殖期、精母细胞生长期、精母细胞成熟期、精子细胞变态期、精子成熟期等5个时期。从Ⅱ期精巢起,金钱鱼精巢的成熟系数(GSI)为0.2%～1.5%,精巢成熟系数在发育到精子细胞成熟期(Ⅴ期)达到峰值,肝重指数(HSI)在精子细胞变态期(Ⅳ期)达到峰值。金钱鱼卵巢的卵母细胞发育过程可分为5个时相,相对应的卵巢发育亦分为5个时期。从Ⅱ期卵巢起,金钱鱼卵巢的成熟系数为1.2%～14.9%,在发育到Ⅴ期时达到峰值,HSI在Ⅳ期达到峰值。Ⅱ时相卵母细胞出现卵黄核和滤泡膜。Ⅲ时相卵母细胞中开始出现油滴,卵黄颗粒。Ⅳ时相卵母细胞中卵黄颗粒与油滴的数量迅速增多。Ⅴ时相卵母细胞中卵黄颗粒融合成片,在卵母细胞中卵黄颗粒与油球之间在数量上没有明显的差异。根据切片观察,Ⅴ期卵巢中,除了Ⅴ时相卵母细胞外,还有一定数量的Ⅱ、Ⅲ和Ⅳ时相卵母细胞,卵母细胞发育呈现非同步型。并且发现在多数产完卵后的卵巢中,除空的滤泡外亦存在一定数量的Ⅱ、Ⅲ和Ⅳ期卵母细胞,因此推测,金钱鱼的产卵类型为分批非同步产卵类型。

The fish spotted scat Scatophagus argus,as a new resource of marine aquaculture,is popularized in South China in recent years.Studies on the gonadal development can provide the theoretical knowledge for the artificial propagation of Scatophagus argus.Generally,after two years of growth,some individuals can reach sexual maturation in the south of China.In this study,histological observation of gonads was performed based on paraffin section technique and HE staining method.The linear alignments of tubular structures are observed in the testis,which indicates that the testis of the Scatophagus argus belongs to the tubular type.The development of testis may be divided into 5 stages,i.e. multiplication of spermatogonial cells,growth of spermatocytes,maturation of spermatocytes,emergence of spermatoblasts,maturation of spermatozoa,etc.The average gonado somatic index of the testis was between 0.2% and 1.5% .The gonado somatic index(GSI)reached the peak at the stageⅤ,and the the peak of hepato somatic index(HSI)was observed at the stage Ⅳ.The oocyte deveolpment was divided into 5 phases and ovary development consisted of 5 stages accordingly.The average gonado somatic index of the testis was between 1.2% and 14.5%.The gonado somatic index(GSI)reached the peak value at the stage Ⅴ and the peak of hepato somatic index(HSI)was found in stage Ⅳ.The yolk nucleus and follicle membrane are observed at phase Ⅱ of oocyte.The number of yolk granules and oil droplets increased rapidly at the phaseⅢ,and subsequently yolk granules fused into pieces at the phase Ⅳ Apart from a large number of oocytes at the phase Ⅴ,there are still many oocytes of phase Ⅱ,Ⅲ and Ⅳ in ovaries at the stage Ⅴ.The similar condition was also found in ovaries after spawning.It indicates that oocyte development in Scatophagus argus is asynchronous.

国家科技部 “十二五”“科技支撑计划”(2011BAD13B00);国家自然科学基金项目(41176109)