【作者】 刘俊果； 宋炜； 梁述章； 蒋科技； 马凌波；

【Author】 LIU Junguo;SONG Wei;LIANG Shuzhang;JIANG Keji;MA Lingbo;Key Laboratory of Oceanic and Polar Fishery Innovation, Ministry of Agriculture, Chinese Academy of Fishery Sciences;

【机构】 农业部远洋与极地渔业创新重点实验室东海水产研究所中国水产科学研究院； 上海海洋大学水产与生命学院；

【摘要】 棘头梅童鱼(Collichthys lucidus)是我国渔业生产的重要对象,也是重要经济鱼类的饵料,是海洋生态系统食物链中的重要环节。通过海上人工授精获得受精卵,对棘头梅童鱼胚胎发育与仔鱼形态特征进行了观察和研究,棘头梅童鱼受精卵为圆球形,透明,油球1个,卵径(1.182?0.041)mm,油球径(0.458?0.015)mm。在水温(25±0.50)℃、盐度23~24条件下,受精卵经20 h孵化出膜。根据对棘头梅童鱼胚胎发育外部形态及典型特征的观察与分析,将其胚胎发育过程划分为合子、卵裂、囊胚、原肠胚、器官形成及出膜6个阶段,共24个发育时期,并对胚胎发育各期的主要形态特征进行描述。在水温(26±0.24)℃、盐度23~24条件下,初孵仔鱼平均全长(2.536?0.059)mm,出膜后9日内为早期仔鱼阶段,以卵黄囊吸收消化为主要形态特征。9日龄至25日龄为晚期仔鱼阶段,各鳍条发育齐全,腹部出现鳞片为止。更多还原

【Abstract】 Collichthys lucidus is an important object of fishery production in our country and an important economic fish. The embryonic development of C. Lucidus and the morphological characteristics of larvae were observed and studied by artificial insemination at sea. Meanwhile we described and record the developing process and time in detail. It is round sphere, colorless, transparent, and the central have an oil-ball(0.458 ? 0.015) mm of the eggs(1.182 ? 0.041) mm of C. Lucidus. Under the condition of water temperature(25 ± 0.50)℃ and salinity of 23~24, the fertilized eggs were incubated for 20 h. The embryonic development process could be divided into 6 stages, including fertilized egg stage, cell division stage, blastula stage, gastrula stage, organ formation stage and hatching stage, and contained 24 developing phases, whose characteristics were described. Under the condition of water temperature(26 ± 0.24)℃ and salinity of 23~24, the length of newly hatched larvae was(2.536 ± 0.059) mm, and the early stage of larvae was observed in 9 days after the hatch. Absorption and digestion of yolk sac is the main morphological feature. When each fin completely forms, and there were scales on the abdomen, it is called Postlarval(from 9 d old to 25 d old).更多还原