| 基于角质颚碳氮稳定同位素探索茎柔鱼地理种群连通性及其洄游 |
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| 引用本文： | 刘必林,陈新军,钱卫国,金岳,李建华.基于角质颚碳氮稳定同位素探索茎柔鱼地理种群连通性及其洄游[J].海洋学报(英文版),2019,38(10):53-59. |
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| 作者姓名： | 刘必林 陈新军 钱卫国 金岳 李建华 |
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| 作者单位： | 上海海洋大学海洋科学学院, 上海 201306;国家远洋渔业工程技术研究中心, 上海 201306;大洋渔业资源可持续开发教育部重点实验室, 上海 201306,上海海洋大学海洋科学学院, 上海 201306;国家远洋渔业工程技术研究中心, 上海 201306;大洋渔业资源可持续开发教育部重点实验室, 上海 201306;青岛海洋科学与技术国家实验室海洋渔业科学与食物产出过程功能实验室, 青岛 266237,上海海洋大学海洋科学学院, 上海 201306;国家远洋渔业工程技术研究中心, 上海 201306;农业部大洋渔业开发重点实验室, 上海 201306,上海海洋大学海洋科学学院, 上海 201306,上海海洋大学海洋科学学院, 上海 201306;农业农村部大洋渔业资源环境科学观测实验站, 上海 201306 |
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| 基金项目： | The Shanghai Pujiang Program under contract No. 18PJ1404100; the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning under contract No. 0810000243; the National Natural Science Foundation of China under contract Nos 41306127 and 41276156. |
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| 摘 要： | 本文分析了2009、2010和2013年期间采集于哥斯达黎加、厄瓜多尔、秘鲁和智利外海的茎柔鱼的角质颚下颚的δ13C和δ15N含量。各海区的稳定同位素含量反应了不同海区背景值的不同，海区间稳定同位素含量差异显著，其中厄瓜多尔外海最低，智利外海最高。δ13C和δ15N散点图显示，尽管秘鲁海区的同位素值与哥斯达黎加和智利的存在一定的重叠，但是δ13C和δ15N值可明显将各海区的样本明显分开。哥斯达黎加、厄瓜多尔和智利外海样本的δ13C和δ15N值分布相对集中以及三海区之间的δ13C和δ15N值差异显著说明，采自哥斯达黎加、厄瓜多尔和智利外海的茎柔鱼样本属于不同地理群体，它们的产卵起源不同，各自在相对狭小的地理区域内移动，相互之间没有种群交流。与之相比，δ13C和δ15N值变化范围广说明，秘鲁外海茎柔鱼样本的幼体是来自不同海区，经理不同的移动路线和索饵场。秘鲁和智利外海茎柔鱼样本的同位素值存在一定的重叠可能是由于两者之间存在一定的种群交流所致。总体来说，通过分析茎柔鱼角质颚稳定同位素的空间差异有助于我们了解其不同地理种群的迁徙策略以及相互之间的连通性。
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| 关 键 词： | 稳定同位素|茎柔鱼|角质颚|地理区域差异|营养水平|东太平洋 |
| 收稿时间： | 2018/5/23 0:00:00 |
δ13C and δ15N in Humboldt squid beaks: understanding potential geographic population connectivity and movement |
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| Liu Bilin,Chen Xinjun,Qian Weiguo,Jin Yue and Li Jianhua.δ13C and δ15N in Humboldt squid beaks: understanding potential geographic population connectivity and movement[J].Acta Oceanologica Sinica,2019,38(10):53-59. |
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| Authors: | Liu Bilin Chen Xinjun Qian Weiguo Jin Yue and Li Jianhua |
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| Institution: | College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China,College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China;Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China,College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China;Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture, Shanghai 201306, China,College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China and College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture, Shanghai 201306, China |
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| Abstract: | We quantified the δ13C and δ15N values in the lower beaks of Humboldt squid, Dosidicus gigas, collected from international waters off Costa Rica, Ecuador, Peru and Chile by Chinese squid jigging vessels during 2009, 2010 and 2013. There was a significant difference in the isotopic values among regions with the lowest value off Ecuador and the highest off Chile, which were interpreted as a function of trophic effects as well as baseline values. However, constant trophic level of D. gigas across its geographic range showed that spatial variation in the baseline of primary production is the main driver responsible for the observed geographic isotope variability. Inter-regional difference and intra-regional convergence of isotope values indicated squid off Costa Rica, Ecuador and Chile belong to different geographically segregated populations, which were previously proved by integrated population identifying method. In contrast, the higher variations in δ13C and δ15N values in a given size group suggest the squid off Peru move and forage in different places. Moreover, potential population exchange could be responsible for the overlap of the isotope values between the squid off Peru and off Chile. On the whole, the spatial difference in isotopic values of Humboldt squid beaks improves our understanding of potential geographic population connectivity and movement. |
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| Keywords: | stable isotope|Dosidicus gigas|beaks|geographic variability|trophic level|the eastern Pacific Ocean |
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