中华鲎的食物组成及营养位置分析  

Dietary composition and trophic position of Tachypleus tridentatus

作　　者：郭清扬 谷阳光[2] 鲍虞园 李银康 周传江 颉晓勇[2] GUO Qingyang;GU Yangguang;BAO Yuyuan;LI Yinkang;ZHOU Chuanjiang;XIE Xiaoyong(College of Fisheries,Henan Normal University,Xinxiang 453000,China;South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences/Key Laboratory of South China Sea Fishery Resources Exploitation&Utilization,Ministry of Agriculture and Rural Affairs,Guangzhou 510300,China;Shanghai Ocean University/Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources,Ministry of Education/National Demonstration Center for Experimental Fisheries,Shanghai 201306,China)

机构地区：[1]河南师范大学水产学院,河南新乡453000 [2]中国水产科学研究院南海水产研究所/农业农村部南海渔业资源开发利用重点实验室,广东广州510300 [3]上海海洋大学/水产种质资源发掘与利用教育部重点实验室/水产科学国家级实验教学示范中心,上海201306

出　　处：《南方水产科学》2021年第4期35-40,共6页South China Fisheries Science

基　　金：国家重点研发计划“蓝色粮仓科技创新”重点专项(2019YFD0901105);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0402);中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项资金资助(2019TS21)。

摘　　要：通过对北部湾海域采集的中华鲎(Tachypleus tridentatus)样品及其食物网链中具有食源可能性的种类(虾类、蟹类、双壳类和鱼类)进行碳、氮稳定同位素(δ^(13)C、δ^(15)N)比值测定,采用稳定同位素混合模型(SIAR)分析北部湾中华鲎食物组成及其营养位置。结果显示,中华鲎δ^(13)C均值为(-17.11±0.03)‰,δ^(15)N均值为(12.14±0.20)‰。SIAR模型显示双壳类为中华鲎的主要食物来源,其平均贡献率为31.27%;其次为鱼类,平均贡献率为25.91%;蟹类平均贡献率占比为23.50%;虾类平均贡献率占比最低(19.32%)。营养位置分析显示中华鲎营养位置为2.02±0.06。该研究涉及的中华鲎潜在食源样本中,鱼类、虾类和蟹类的营养位置分别为2.13±0.51、2.36±0.09和2.61±0.21。营养位置分析表明中华鲎在自然生态系统食物网中处于较为弱势的地位,在已然濒危的情况下迫切需要科学的保护措施。The stable isotope ratios(δ^(13)C andδ^(15)N)of carbon and nitrogen of Tachypleus tridentatus collected from Beibu Gulf and its potential food source species(Shrimps,crabs,bivalves and fishes)in food web were determined.Besides,their food composition and nutritional position were anayzed by stable isoelement mixture model(SIAR).The results show that the averageδ^(13)C andδ^(15)N values of the T.tridentatus were(−17.11±0.03)‰and(12.14±0.20)‰,respectively.Potential food sources of T.tridentatus were shrimps,crabs,bivalves and fishes.The SIAR model shows that bivalves were the main food source of T.tridentatus with average contribution rate of 31.27%(Fishes:25.91%,crabs:23.50%,shrimps:19.32%).The trophic position of T.tridentatus was 2.02±0.06,while those of fishes,shrimps and crabs were 2.13±0.51,2.36±0.09 and 2.61±0.21,respectively.Trophic position analysis shows that T.tridentatus is in a relatively weak position in the natural ecosystem food web,and scientific protection measures are urgently needed as it is already endangered.

关 键 词：中华鲎 食物组成 营养位置 碳稳定同位素 氮稳定同位素 

分 类 号：S917.4[农业科学—水产科学]