| 东海中北部游泳动物稳定碳氮同位素研究 |
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| 引用本文： | 纪炜炜,陈雪忠,姜亚洲,刘勇,胡芬,李圣法.东海中北部游泳动物稳定碳氮同位素研究[J].海洋渔业,2011,33(3). |
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| 作者姓名： | 纪炜炜 陈雪忠 姜亚洲 刘勇 胡芬 李圣法 |
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| 作者单位： | 1. 中国科学院海洋研究所,青岛266071;中国水产科学研究院东海水产研究所,上海200090;中国科学院研究生院,北京100039
2. 中国水产科学研究院东海水产研究所,上海,200090 |
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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基金资助(2009M01);中央级公益性科研院所基本科研业务费专项基金资助(2008T04); 国家科技支撑计划项目东海区主要渔场重要渔业资源的调查和评估(2007BAD43B01) |
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| 摘 要： | 利用稳定同位素方法分析2009年夏季东海中北部23种游泳动物的类群差异、种间和种内变异。结果显示,东海北部游泳动物种间C、N同位素比值变化范围较大,δ15N值范围为6.9‰~13.4‰,1δ3C值为-20.7‰~-14.7‰。其中虾类生物1δ3C平均值为(-17.06±1.43)‰,δ15N平均值为(10.26±0.84)‰;头足类生物1δ3C平均值为(-16.54±0.97)‰,δ15N平均值为(11.68±0.62)‰;小型鱼类δ13C平均值为(-16.27±0.84)‰,δ15N平均值为(10.36±1.25)‰;大中型鱼类δ13C平均值为(-16.89±1.32)‰,δ15N平均值为(11.25±1.03)‰。方差分析结果显示,4个类群的稳定C、N同位素比值具有显著差异(P<0.01)。种内不同个体间也存在较大差异。线性回归表明鹰爪虾(Trachypenaeus curvirostris)、戴氏赤虾(M etapenaeopsisdalei)、脊腹褐虾(Crangon affinis)、小黄鱼(Larim ichthys polyactis)、蓝圆鲹(Decapterus maruadsi)和黄鮟鱇(Lophius litulon)6种游泳动物体长和1δ3C值之间存在显著的相关关系,脊腹褐虾、小黄鱼、银鲳(Pampusargenteus)和白姑鱼(Argyrosomus argentatus)4种动物1δ5N值随体长增加发生显著变化。此外,1δ5N值与种间大小格局也具有显著相关性。稳定同位素分析结果表明,东海游泳动物生态位重叠现象明显,种类摄食特化程度不高,营养结构正趋向简单化。
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| 关 键 词： | 稳定同位素 粒径谱 营养结构 |
Stable isotope analysis of some representative nektonic organisms in the central and northern part of East China Sea |
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| JI Wei-wei,CHEN Xue-zhong,JIANG Ya-zhou,LIU Yong,HU Fen,LI Sheng-fa.Stable isotope analysis of some representative nektonic organisms in the central and northern part of East China Sea[J].Marine Fisheries,2011,33(3). |
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| Authors: | JI Wei-wei CHEN Xue-zhong JIANG Ya-zhou LIU Yong HU Fen LI Sheng-fa |
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| Institution: | JI Wei-wei1,2,3,CHEN Xue-zhong2,JIANG Ya-zhou2,LIU Yong2,HU Fen2,LI Sheng-fa2(1.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China,2.East China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200090,3.Graduate University of Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | The present paper examined stable isotopic differences among nektonic categories for 23 nektonic species in the northern part of East China Sea,associated with inter-and intra-specific stable isotopic variance.Stable nitrogen isotope ratios ranged from 6.9‰ to 13.4‰,while stable carbon isotope ratios ranged from-20.7‰ to-14.7‰.Results revealed that for shrimps,mean δ13C values were-17.06±1.43‰,and mean δ15N values were 10.26±0.84‰;for cephalopods,mean δ13C values were-16.54±0.97‰,and mean δ15N values were 11.68±0.62‰;for small-size fishes,mean δ13C values were-16.27±0.84‰,and mean δ15N values were 10.36±1.25‰;for other fishes,mean δ13C values were-16.89±1.32‰,and mean δ15N values were 11.25±1.03‰.ANOVA analysis showed that δ15N and δ13C varied significantly among four groups(P<0.01).Discrepancy also existed among different individuals of the same species.Six species showed significant ontogenetic variation in terms of δ13C value for Trachypenaeus curvirostris,Metapenaeopsis dale,Crangon affinis,Larimichthys polyactis,Decapterus maruadsi,Lophius litulon and four species with δ15N value,which were Crangon affini,Larimichthys polyactis,Pampus argenteus and Argyrosomus argentatus.Cross-species analysis for relationships between body size and stable isotopic ratios in study area showed that there were positive relationships between size classes and δ15N.Results suggested that distinct dietary overlap were present among the predators and trophic groups.The trophic structure for the nektonic species in East China Sea tended to simplification. |
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| Keywords: | Stable isotope size spectrum trophic structure |
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