人工养殖银鲳子代胚胎发育及仔稚幼鱼形态观察
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中国水产科学研究院 东海水产研究所, 农业部海洋与河口渔业重点开放实验室, 上海 200090

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施兆鸿(1960), 研究员, 从事鱼类生理与繁殖方面研究. E-mail:shizhh@hotmail.com

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国家十二五科技支撑计划项目(2011BAD13B01); 中央级公益性科研院所基本科研业务费资助项目(东2008M14、东2009M05); 沪农科攻字(2007)第4-1 号资助项目.


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    摘要:

    Pampus argentus)卵径。在水温~受精卵经、盐度~~经后期仔鱼分化出侧囊、食道、胃、幽门盲囊和肝脏等消化器官, 体高稚鱼期消化器官进一步完善随后尾下骨出现并且尾下骨末端与体轴倾斜日龄尾下骨与体轴垂直全长。幼鱼期胸鳍前端呈尖形此时体形与成鱼已无差别。此外本研究还对仔稚幼鱼的划分、鲳属鱼类中主要品种胚胎与仔稚鱼发育的异同点以及育苗中容易出现死亡的关键时期进行了分析探讨。

    Abstract:

    The embryonic, larval and juvenile development of the offspring obtained from cultured silver pomfret () was observed, which contributed to the study of larvae rearing and breeding biology of pomfret. The eggs of silver pomfret were telolecithal, and had only one oil globule. The diameter of egg and oil globule were (1.417 ± 0.063) mm and (0.575 ± 0.031) mm, respectively. The hatching time was about 36 h after fertilization when the first larva was hatched at (20.0 ± 0.5) , salinity 24 ± 1 and pH 8.0−8.5. Juvenile stage occurred 60 d after hatching (DAH) at 19.0−24.0, salinity 23 ± 1, pH 8.0−8.5 and 2 000−3 000 lx. There were 4 consecutive periods: pre-larval, post-larval, juvenile and young stages, during the development of silver pomfret. The morphological feature of pre-larval was the utilization of yolk sac. The post-larval was known as the occurrence of some organs such as esophageal sac, esophagus, stomach, pyloric caeca and liver. And the external character of post-larval was as follows: there were visible star-shaped melanin and golden spots in the two sides of fish body. And the primordium of dorsal and ventral fins was also occurred in the post-larval stage. In the juvenile stage, the digestive organs had been further developed. At 13DAH, the body length and height were (5.586±0.479) mm and (1.068±0.087) mm; the tail end of dorsal chord curved upward slightly, and then the hypural occurred. In the beginning, the end of hypural and body axis inclined to one another. At 35 DAH, hypural was perpendicular to the body axis. At 45 DAH, the body height increased significantly, and total body length and body height were (25.560±3.870) mm and (11.157±1.266) mm, respectively. In the young stage, pectoral fin had a sharp-pointed front end; caudal fin grew fast and formed forked; all fish scales had been formed. At 60 DAH, the body length and height were (41.000±3. 300) mm and (19.750±1.620) mm, respectively. And there was no difference in the morphological feature between young fish and adult fish. In addition, the paper makes an analysis of the division of larvae and juvenile stages, difference in the embryo, larvae and juvenile developments between main species of pomfret, and key stages of death during artificial breeding of silver pomfret.

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施兆鸿,彭士明,王建钢,孙鹏,尹飞.人工养殖银鲳子代胚胎发育及仔稚幼鱼形态观察[J].中国水产科学,2011,18(2):267-274
.[J]. Journal of Fishery Sciences of China,2011,18(2):267-274

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  • 在线发布日期: 2011-03-09
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