| 摘要: |
| 研究了人工养殖半滑舌鳎(Cynoglossus semilaevis)卵巢发育组织学的季节变化及其与性成熟系数(gonadosomatic index, 简称GSI)和肝质量指数(hepatosomatic index, 简称HSI)的关系。结果表明, 半滑舌鳎成熟鱼卵巢发育经历Ⅱ期、Ⅲ期、Ⅳ期、Ⅴ期、Ⅵ期, 再到重复发育Ⅱ期; 人工养殖条件下, 3~5月份大部分鱼卵巢处于Ⅱ期, 从6 月份开始, 其卵母细胞内开始沉积卵黄颗粒, 9~11 月份, 卵母细胞内卵黄颗粒充盈整个胞质, 基本达到生长成熟, 排卵后至翌年2 月份, 卵巢进入了退化吸收Ⅵ期或重复发育Ⅱ期; 繁殖期GSI 达到最高峰; 产卵后或重复发育Ⅱ期, GSI 显著下降, 此时HSI 显著升高至全年最高峰; 半滑舌鳎在1 a 中只有1 个繁殖期, 进行分批产卵。 |
| 关键词: 半滑舌鳎(Cynoglossus semilaevis) 卵巢 产卵类型 |
| DOI： |
| 分类号: |
| 基金项目:国家“十一五”科技支撑计划资助项目(2006BAD09A01) |
|
| Studies on ovarian development and spawn type of cultured half-smooth tongue sole, Cynoglossus semilaevis |
|
CHEN Cai-fang,WEN Hai-shen,CHEN Xiao-yan,ZHANG Jia-ren,JIN Guo-xiong,SHI Bao,SHI Dan,YANG Yan-ping,HE Feng,LI Ji-fang
|
| Abstract: |
| Seasonal variations of ovarian development and the relationship with Gonadosomatic index (GSI)、hepatosomatic index (HSI) was studied in the cultured half-smooth tongue sole Cynoglossue semilaevis. The results show that ovarian development consists of phaseⅡ,Ⅲ,Ⅳ,Ⅴ,Ⅵ, then cycles to recrudescent phase II; under artificial culture, most fish has phaseⅡovarium from March to May, and the oocytes begin to accumulate vitellin granule from June, then the whole cytoplasm is stuffed with vitellin granule ranging from September to November, suggesting the oocytes growth to mature, after spawning, the ovarium come to assimilative phase Ⅵ or recrudescent phaseⅡ; GSI reaches to an peak during reproduction, then dramatically drop after spawning or recrudescent phase Ⅱ while HSI significantly increases to maximum; there is only one breeding season in the half-smooth tongue sole, and it belongs to batch-spawning fish. This study enriches reproductive physiology of fish, and offers the scientific foundation for optimizing the technology of the half-smooth tongue sole artificial reproduction. |
| Key words: Cynoglossus semilaevis ovarian spawn type |
