| 多棘海盘车胚胎和早期幼虫发育 |
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| 引用本文： | 杜美荣,张继红,毛玉泽,蒋增杰,高亚平,方建光.多棘海盘车胚胎和早期幼虫发育[J].海洋水产研究,2014(1):133-138. |
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| 作者姓名： | 杜美荣 张继红 毛玉泽 蒋增杰 高亚平 方建光 |
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| 作者单位： | 农业部海洋渔业可持续发展重点实验室山东省渔业资源与生态环境重点实验室中国水产科学研究院黄海水产研究所,青岛266071 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项资金（20603022011003）和国家“863”计划项目（2012AA10A405-2）共同资助 |
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| 摘 要： | 对室内培育的多棘海盘车Asterias amurensis胚胎和幼虫的发育以及外部形态进行了显微观察。多棘海盘车为雌雄异体,体外受精,成熟卵卵径为(130~150)μm,卵裂属完全均等型。水温为(10.5~11.5)℃时,受精卵经20min左右释放第1极体,约50min进行第1次卵裂,约7h时进入桑葚期,19h40min发育成为膜内旋转囊胚,23h40min发育成为脱膜旋转囊胚,26h30min发育成为早期原肠胚,纤毛幼虫(初孵幼虫)出现在46h,从受精到短腕幼虫历时25d。由纤毛幼虫到短腕幼虫的过程中幼虫体长经历了先增大后减小的过程。进一步发现,投喂混合饵料(小新月菱形藻Nitzschia closteriumf.minutissima和海洋红酵母Rhodomonas sp.1∶1)的幼虫发育速度比单独投喂小新月菱形藻的快,但差异不显著(P0.05)。
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| 关 键 词： | 多棘海盘车 胚胎发育 幼虫发育 |
Development of embryo and early stage larvae of Asterias amurensis |
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| DU Mei-rong,ZHANG Ji-hong,MAO Yu-ze,JIANG Zeng-jie,GAO Ya-ping,FANG Jian-guang.Development of embryo and early stage larvae of Asterias amurensis[J].Marine Fisheries Research,2014(1):133-138. |
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| Authors: | DU Mei-rong ZHANG Ji-hong MAO Yu-ze JIANG Zeng-jie GAO Ya-ping FANG Jian-guang |
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| Institution: | (Shandong Provincial Key Laboratory of Fishery Resources and Eco-environment, Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071) |
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| Abstract: | The morphology of embryo and early stage larvae of Asterias amurensis was continuously observed under microscope in this study. A. amurensis is dioecism, and the fertili- zation happened after the sperm and eggs were released into the seawater. The diameter of the ovum is about （130-150）tzm and the fertilized eggs cleaved with complete equal cleavage. The first polar body extruded at about 20rain at temperatures of （10.5-11.5）℃ and then the first cleavage happened at 50rain. Till 7h, the fertilized egg developed into morula stage and later in- to the stage of ciliated blastula rotating in the ovum membrane （19h 40min）, swimming blastula out of the ovum membrane （23h 40rain）, early gastrula （26h 30rain） and dipleurula （46h）. The whole development process from fertilized egg to brachiolaria took about 25 days, and the body lengh of the larvae experienced an increase-decrease process. Futhermore, the group fed with the microalgal mixture （N. closterium f. minutissima and marine yeast Rhodomonas sp, 1 ： 1） grew more rapidly than the group fed with only N. closterium f. minutissima, but the difference was not significant（P 〈 0. 05）. |
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| Keywords: | Asterias amurensis Embryo development Larvae development |
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