Stage I of both male and female stone flounder appears only once in all its life, and the germ cells are comprised by spermatogonia or oogonia. The gonad from Mar to Aug keeps at stage II. The gonad index of testis at this stage is 0.037%, and the amount of spermatogonia is increased quickly. There is some linear germ plasm in the cytoplasm of spermatogina. In ovary at this stage it is mostly composed by oocyte of phase 2 which the character is the appearance of yolk nucleus, and no zona radiate in membrane. The mean GI of ovary is 1.95%. From Sep to Oct gonad is at stage III which testis is composed by lots of spermatogina and few spermatocytes, and the mean GI of testis at this stage is 0.086%. In ovary the ooctyes at phase 3 are in dominate position, the yolk nucleus disappear. And the GI of this stage is 3.35%. Both testis and ovary are at stage IV in Nov. hi testis the germ cells are in spermiogenesis, and the mean GI is 0.93%. hi ovary the oocytes are mostly at phase 4, which are filled in the cytoplasm with vitellin granule, and the zona radiate in membrane begins to formation. Nucleus moves to one side of the oocyte gradually. The mean GI of ovary at this stage is 9.37%.

在每年的3月-8月期間性腺處于Ⅱ期天天舔天天干，此期精巢中精原細(xì)胞明顯增多GOGO人体无码视频私拍，胞質(zhì)局部可見有線狀的生殖質(zhì)存在日本欧美国产中文字幕，平均成熟系數(shù)為0.037％一级毛片精久久久久久久；卵巢中以2時(shí)相卵母細(xì)胞為主，可見細(xì)胞質(zhì)中出現(xiàn)強(qiáng)嗜堿性的卵黃核久久是出精品，細(xì)胞外由一層濾泡細(xì)胞包圍人人射人人操人人骑人人插，但尚無放射帶，平均成熟系數(shù)為1.95％91人妻久久久精品99系列。9月-10月期間性腺處于Ⅲ期网站免费看你懂的，此期精巢中仍有大量精原細(xì)胞，同時(shí)可見部分精母細(xì)胞日本丝袜高跟一区二区，平均成熟系數(shù)為0.086％；卵巢中以3時(shí)石鮮孟加限加$玩印面n洲匆s性腺發(fā)生婷婷五月综合色啪网站、分化及發(fā)育的周年變化相卵母細(xì)胞為主欧美特色A片在线观看网站，細(xì)胞質(zhì)中的卵黃核己消失，平均成熟系數(shù)為3.35%来个能看的黄网。11月性腺處于IV期黄色视频制服网站，此期精巢內(nèi)精細(xì)胞正處于不同的形成過程中，平均成熟系數(shù)為0.93%国产成人精品一区二三区；卵巢中以4時(shí)相卵母細(xì)胞為主国产欧美日韩另类一区，胞質(zhì)中充滿染成桔紅色的卵黃顆粒。

yolk nucleus：卵黃核

yolk granule 卵黃粒 | yolk nucleus 卵黃核 | yolk plug 卵黃栓

yolk nucleus：卵黃核,巴比阿尼氏核

yolk membrane ==> 卵黃膜 | yolk nucleus ==> 卵黃核,巴比阿尼氏核 | yolk plug ==> 卵黃栓

yolk nucleus;balbiani body：卵黃核

卵黃 yolk | 卵黃核 yolk nucleus;balbiani body | 卵黃囊 yolk sac

vitelline body; yolk nucleus：卵黃核

卵黃動(dòng)脈 vitelline artery | 卵黃核 vitelline body; yolk nucleus | 卵黃腔 vitelline cavity