长江口棘头梅童鱼夏季肌肉脂肪酸组成及食源指示分析  

Analysis of fatty acid composition and food source indication in the muscle of Collichthys lucidus in Yangtze River estuary in summer

作　　者：王敏 杨刚[1] 冯广朋[1,2] 宋超[1] 孙金辉 崔培[2] 陈桂芹[3] WANG Min;YANG Gang;FENG Guangpeng;SONG Chao;SUN Jinhui;CUI Pei;CHEN Guiqin(East China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200090,China;Tianjin Agricultural University,Tianjin 300380,China;Shanghai Xigeng Environmental Technology Co.,Ltd.,Shanghai 201914,China)

机构地区：[1]中国水产科学研究院东海水产研究所,上海200090 [2]天津农学院,天津300380 [3]上海喜耕环保科技有限公司,上海201914

出　　处：《水产科技情报》2025年第2期85-91,共7页Fisheries Science & Technology Information

基　　金：国家重点研发计划蓝色粮仓重点专项课题(2019YFD0901205);农业农村部财政专项(长江禁捕后常态化监测专项)。

摘　　要：为了解长江口棘头梅童鱼(Collichthys lucidus)的营养和摄食情况,在长江口采集野生棘头梅童鱼105尾,将样本按体长分为<40 mm、40~59 mm、60~79 mm共3个组别,采用气相色谱质谱法(GC-MS)检测其肌肉的脂肪酸组成,进而通过脂肪酸标记法进行食源指示分析。结果表明:各个组别之间饱和脂肪酸(SFA)、单不饱和脂肪酸(MUFA)、多不饱和脂肪酸(PUFA)的含量均有显著性差异(P<0.05),而二十二碳六烯酸(DHA)与二十碳五烯酸(EPA)的比值(DHA/EPA)不存在显著性差异(P>0.05)。体长<40 mm组SFA、PUFA的含量最高,而体长60~79 mm组MUFA含量最高;特征脂肪酸C16∶0、C20∶5n3、C22∶6n3、C18∶ln9指示了棘头梅童鱼对食物源藻类的摄食,C20∶4n6和C18∶1n7指示了其对食物源底栖生物的摄食,C18∶1n7与C18∶1n9的比值(0.36)<0.5表明了其对肉食性食物源的摄食。综合以上指标,棘头梅童鱼为杂食性鱼类。To understand the nutrition and feeding status of Collichthys lucidus,one of the major species in the Yangtze River estuary,105 wild C.lucidus were collected and classified into three groups based on their body length(<40 mm,40-59 mm,and 60-79 mm).The fatty acid composition of muscle was analyzed by gas chromatography-mass spectrometry(GC-MS),and their food source indication was determined by fatty acid labeling method.The results showed significant differences in the contents of saturated fatty acids(SFA),monounsaturated fatty acids(MUFA)and polyunsaturated fatty acids(PUFA)among the groups(P<0.05),while no significant differences were observed in the ratio of DHA and EPA(P>0.05).The contents of SFA and PUFA in fish with body length less than 40 mm were the highest,while the fish with 60-79 mm body length group had the highest MUFA content.The characteristic fatty acids C16∶0,C20∶5n3,C22∶6n3 and C18∶1n9 indicated algae as a food source of C.lucidus,while C20∶4n6 and C18∶1n7 indicated their food source came from benthic organisms.Besides,C18∶1n7/C18∶1n9<0.5 indicated the intake of carnivorous food sources.According to the above indexes,C.lucidus is an omnivorous species.

关 键 词：棘头梅童鱼 脂肪酸 食物源 长江口 

分 类 号：TS2[轻工技术与工程—食品科学与工程]