δ13C and δ15N in Humboldt squid beaks: understanding potential geographic population connectivity and movement

作     者：Bilin Liu Xinjun Chen Weiguo Qian Yue Jin Jianhua Li 

作者机构：College of Marine SciencesShanghai Ocean UniversityShanghai 201306China National Engineering Research Center for Oceanic FisheriesShanghai 201306China Key Laboratory of Sustainable Exploitation of Oceanic Fisheries ResourcesMinistry of EducationShanghai 201306China Key Laboratory of Oceanic Fisheries ExplorationMinistry of AgricultureShanghai 201306China Scientific Observing and Experimental Station of Oceanic Fishery ResourcesMinistry of AgricultureShanghai 201306China Laboratory for Marine Fisheries Science and Food Production ProcessesPilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2019年第38卷第10期

页      面：53-59页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：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 

主　　题：stable isotope Dosidicus gigas beaks geographic variability trophic level the eastern Pacific Ocean 

摘      要：We quantified theδ^13C andδ^15N 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 *** 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 ***,constant trophic level of *** across its geographic range showed that spatial variation in the baseline of primary production is the main driver responsible for the observed geographic isotope ***-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 *** contrast,the higher variations inδ^13C andδ^15N values in a given size group suggest the squid off Peru move and forage in different ***,potential population exchange could be responsible for the overlap of the isotope values between the squid off Peru and off *** the whole,the spatial difference in isotopic values of Humboldt squid beaks improves our understanding of potential geographic population connectivity and movement.