| 江鳕胚胎发育的观察 |
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| 引用本文： | 高晓田,肖国华,陈力,张立坤.江鳕胚胎发育的观察[J].鲑鳟渔业,2012(1):14-18. |
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| 作者姓名： | 高晓田 肖国华 陈力 张立坤 |
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| 作者单位： | 河北省海洋与水产科学研究院,河北秦皇岛066000 |
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| 摘 要： | 研究了人工繁殖时江鳕（Lota lota）的胚胎发育。江鳕的胚胎发育分为胚盘期、卵裂期、囊胚期、原肠期、神经胚期、器官形成期6个阶段,20个发育时期,详细描述了各个发育时期的特征。在0~3℃下,胚胎历时998h孵出仔鱼,从受精卵至孵出的积温为887~1023h.℃。本研究还比较了江鳕自产与人工授精时卵的受精率的差异。结果显示,人工授精卵的受精率（约30%）比自产（19.4%）高10%。江鳕胚胎发育的不同时期对外界环境的敏感性不同,主要经历了3个死亡高峰,包括胚盘期至二细胞期、桑椹胚期至原肠早期、出膜期。
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| 关 键 词： | 江鳕 胚胎发育 积温 受精率 存活率 |
Observation of Embryonic Development of Burbot（Lota lota） |
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| Authors: | GAO Xiao-tian XIAO Guo-hua CHEN Li ZHANG Li-kun |
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| Institution: | (Hebei Ocean and Fisheries Science Reseach Institute,Qinhuangdao 066000,China) |
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| Abstract: | The embryonic development of burbot（Lota lota） was observed consecutively and divided into 6 stages fertilized egg,cell division,blastula,gastrula,neurula and organogenesis,including twenty developmental phases,whose characteristics were described.The larvae hatched 998 hours after fertilization at water temperature of 0~3℃,with a cumulative temperature of 887~1023h·℃.The comparison of the fertilization rate between spontaneous and artificial insemination showed that there was about 10% higher fertilization rate in the artificial insemination（30%） than that in the spontaneous fertilization（19.4%）.It was found that various embryonic development stages showed different sensitivity to the ambient environment.Three peaks of mortality were observed on from blastdisc stage to two-celled stage and from morula stage to early gastrula stage,and hatching stage during the embryonic development of the turbot. |
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| Keywords: | borbot（Lota lota） embryonic development accumulative temperature fertilization rate survival |
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