| 日本鳗鲡早期幼苗趋光性及视觉发育特征 |
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| 引用本文： | 张涛,张洁明,郭峰,柳凌.日本鳗鲡早期幼苗趋光性及视觉发育特征[J].淡水渔业,2009,39(3). |
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| 作者姓名： | 张涛 张洁明 郭峰 柳凌 |
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| 作者单位： | 1. 华中农业大学水产学院,武汉,430070;中国水产科学研究院长江水产研究所
2. 中国水产科学研究院长江水产研究所 |
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| 基金项目： | 国家科技支撑计划，中央级公益性科研院所基本科研业务费专项资金(中国水产科学研究院淡水渔业研究中心)资助项目 |
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| 摘 要： | 研究了出膜后第1～9 d的日本鳗鲡(Anguilla japonica)早期幼苗,在不同光强度下趋光性分布及视觉发育组织学特征。结果显示:在8900 lux的强光条件下,日本鳗鲡早期幼苗随着发育,表现出明显的负趋光性。到9 d时,占存活幼苗52.2%的幼苗都集中在最暗的110 lux区域;而在2300 lux的弱光条件下,表现出趋弱光性。到9 d时,占存活幼苗44.6%的幼苗都集中在25 lux区域。视网膜发育的组织学观察发现,日本鳗鲡幼苗的视网膜发育首先出现的是外界膜和内界膜,最后出现的是外丛层。幼苗的整个视网膜结构到9 d时,发育为9亚层结构。视网膜中最发达的是外核层,由3种细胞构成。发育最快的是内核层,由2种细胞构成。结果表明,与日本鳗鲡早期幼苗趋光性有关的因素包括视网膜分层、视网膜厚度、内核层细胞数等多种因素。另外,本研究还探讨了日本鳗鲡幼苗在自然界可能生存的水深和光环境。
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| 关 键 词： | 日本鳗鲡(Anguilla japonica) 幼苗 趋光性 视觉发育 |
Characteristics of phototaxy and optical development of Japanese eel (Anguilla japonica) larva |
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| ZHANG Tao,ZHANG Jie-Ming,GUO Feng,LIU Ling.Characteristics of phototaxy and optical development of Japanese eel (Anguilla japonica) larva[J].Freshwater Fisheries,2009,39(3). |
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| Authors: | ZHANG Tao ZHANG Jie-Ming GUO Feng LIU Ling |
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| Institution: | ZHANG Tao1,2,ZHANG Jie-Ming2,GUO Feng2,LIU Ling2(1.Fisheries Colleges of Huazhong Agriculture University,Wuhan 430070,2.Key Laboratory of Freshwater Biodiversity Conservation and Utilization,Yangtse River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Jinzhou,Hubei 434000) |
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| Abstract: | The present investigation attempted to analyze the distribution of Japanese eel(Anguilla japonica)larvae after hatching 1 d~9 d within different intension of light.The results indicated that:the larvae showed obvious negative phototaxis under the illumination of 8900 lux high light source.Apart from the 1 d larvae,which distributive number was undifferent between 300 and 110 lux region in the box,the 3 d larvae began to represent the behaviour of keeping in the darkest region within the box with their devel... |
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| Keywords: | Anguilla japonica larvae phototaxy optical development |
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