基于脂肪酸和稳定同位素的东海剑尖枪乌贼摄食生态季节差异  

Seasonal differences of feeding ecology of Uroteuthis edulis in the East China Sea based on fatty acid and stable isotope

作　　者：郭荣佩 张柏豪 李楠 方舟[1,2,3,4,5] GUO Rongpei;ZHANG Baihao;LI Nan;FANG Zhou(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Ministry of Education Key Laboratory of Sustainable Exploi-tation of Oceanic Fisheries Resources,Shanghai 201306,China;National Engineering Research Center for Oceanic Fisheries,Shanghai 201306,China;Key Laboratory of Ocean Fisheries Exploitation,Ministry of Agriculture and Rural Affairs,Shanghai 201306,China;Scientific Observing and Experimental Station of Oceanic Fishery Resources,Ministry of Agriculture and Rural Affairs,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]大洋渔业资源可持续开发教育部重点实验室,上海201306 [3]国家远洋渔业工程技术研究中心,上海201306 [4]农业农村部大洋渔业开发重点实验室,上海201306 [5]农业农村部大洋渔业资源环境科学观测实验站,上海201306

出　　处：《应用生态学报》2023年第7期1754-1762,共9页Chinese Journal of Applied Ecology

基　　金：国家重点研发计划项目(2019YFD0901404);国家自然科学基金面上项目(NSFC41876141)资助。

摘　　要：剑尖枪乌贼是东海重要的渔业资源捕捞对象,同时也在东海食物网中占据重要地位。本研究根据2020年9月至2021年1月在东海采集的剑尖枪乌贼样本,利用脂肪酸标记法和稳定同位素技术对其在秋冬季的摄食生态差异进行研究。结果表明:秋冬季的剑尖枪乌贼脂肪酸均是多不饱和脂肪酸(PUFA)的含量最高,其次为饱和脂肪酸(SFA),而单不饱和脂肪酸(MUFA)的含量最低。秋季和冬季的PUFA和MUFA含量均存在显著差异,而SFA含量则无明显差异。非度量多维尺度分析表明,油酸(C18:1n9)可作为秋季样本的特征脂肪酸,二十二碳六烯酸(C22:6n3)可作为冬季样本的特征脂肪酸。稳定同位素分析表明,秋季和冬季的δ^(15)N存在显著差异,而δ^(13)C则无显著差异;秋季样本的营养生态位总面积(TA)、δ^(15)N范围(NR)、标准椭圆面积(SEA)和校正的标准椭圆面积(SEAC)均小于冬季,而δ^(13)C范围(CR)则相反。Spearman秩相关性检验结果显示,秋季和冬季的剑尖枪乌贼的脂肪酸含量和稳定同位素比值与个体胴长之间的相关性存在差异。本研究结果为东海食物网的物流能流研究提供了基础数据,有利于剑尖枪乌贼资源的可持续开发利用。Uroteuthis edulis,an important fishery target species,plays an important role in the food web of the East China Sea.We collected U.edulis samples in the East China Sea from September 2020 to January 2021 to examine their feeding differences in autumn and winter based on fatty acid and stable isotope analyses.The results showed that the content of polyunsaturated fatty acids(PUFA)was the highest,followed by saturated fatty acids(SFA),and the lowest content of monounsaturated fatty acids(MUFA)in autumn and winter.Results of the similarity ana⁃lysis showed significant differences in PUFA and MUFA contents but no differences in SFA contents between autumn and winter.Results of non⁃metric multidimensional scale analysis showed that C18:1n9 could be used as signature fatty acids in autumn samples and C22:6n3 as characteristic fatty acids in winter samples.There was significant difference ofδ^(15)N between autumn and winter,but no difference ofδ^(13)C.The total area(TA),range of δ^(15)N(NR),standard ellipse area(SEA)and the corrected version of the standard ellipse area(SEAC)in autumn were all smaller than those in winter,but range of δ^(13)C(CR)was on the contrary.Results of the Spearman rank correlation test showed that there were differences between fatty acid content and stable isotope ratio of U.edulis and the dorsal mantle length in autumn and winter.Our results could provide basic data for understanding material and energy flow of the East China Sea food web,which is conducive to the sustainable development and utilization of U.edulis.

关 键 词：东海 剑尖枪乌贼 脂肪酸 稳定同位素 摄食生态 

分 类 号：S931.1[农业科学—渔业资源]