基于胃含物和碳、氮稳定同位素研究浙江南部近海蓝圆鲹的摄食生态  

Feeding ecology of Decapterus maruadsi in the southern coastal area of Zhejiang based on stomach contents and stable isotope analysis

作　　者：徐雯 杨蕊 陈淦[1,2,3] 高春霞 叶深[4,5] 韩东燕 XU Wen;YANG Rui;CHEN Gan;GAO Chun-xia;YE Shen;HAN Dong-yan(College of Marine Science,Shanghai Ocean University,Shanghai 201306,China;National Distant-water Fisheries Engineering Research Center,Shanghai 201306,China;National Data Centre for Distant-Water Fisheries of China,Shanghai 201306,China;Zhejiang Maricultural Research Institute,Wenzhou 325005,Zhejiang,China;Zhejiang Key Laboratory of Exploitation and Preservation of Offshore Bio-resource,Wenzhou 325005,Zhejiang,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]国家远洋渔业工程技术研究中心,上海201306 [3]大洋渔业资源可持续开发教育部重点实验室,上海201306 [4]浙江省海洋水产养殖研究所,浙江温州325005 [5]浙江省近岸水域生物资源开发与保护重点实验室,浙江温州325005

出　　处：《应用生态学报》2022年第11期3097-3104,共8页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(41906074,31902372)资助。

摘　　要：蓝圆鲹是浙江南部近海的重要经济鱼类。本文根据2020年5月、8月、11月和2021年1月在浙江南部近海进行的底拖网调查,应用胃含物分析和碳氮稳定同位素分析对浙江南部近海蓝圆鲹的摄食习性进行研究。结果表明:浙江南部近海蓝圆鲹δC平均值为(-16.55±0.60)‰,范围为-17.76‰~-15.25‰,与叉长呈显著负相关;蓝圆鲹δN平均值为(11.76±0.88)‰,范围为9.06‰~13.03‰,与叉长呈显著正相关。根据δN值计算浙江南部近海蓝圆鲹的平均营养级为3.89±0.26。胃含物分析表明,浙江南部近海蓝圆鲹的主要饵料类群为鱼类、虾类、蟹类、头足类、多毛类和小型甲壳类。稳定同位素分析表明,虾类对浙江南部近海蓝圆鲹的营养贡献率最高(40%~84%),其次为多毛类、小型甲壳类、蟹类、头足类和鱼类。蓝圆鲹的摄食习性有明显的生长变化,随着蓝圆鲹叉长的增加,其倾向于摄食更高营养级的饵料生物。Decapterus maruadsi is an important economic pelagic fish in the southern coastal area of Zhejiang.According to the bottom trawl surveys conducted in May,August,November 2020 and January 2021,the feeding habits of D.maruadsi in the southern coastal area of Zhejiang were examined by both stable isotope(carbon,δC,and nitrogen,δN)and stomach content analyses.Results showed that theδC value of D.maruadsi ranged from-17.76‰to-15.25‰,with a mean of(-16.55±0.60)‰,while theδN value ranged from 9.06‰and 13.03‰,with a mean of(11.76±0.88)‰.There was a significant negative correlation between theδC values and fork length,and a positive relationship between theδN with fork length.Results from stomach content analysis showed that the main prey groups of D.maruadsi were fish,shrimp,crabs,Cephalopod,Polychaete,and small crustaceans.As for the stable isotope analysis,the nutritional contribution rate of shrimp was the highest(40%-84%)among all prey groups,followed by Polychaete,small crustaceans,crabs,Cephalopods and fish.Significant ontogenetic dietary changes were found for D.maruadsi.As the fork length of D.maruadsi increased,it tended to eat prey from higher trophic levels.

关 键 词：胃含物分析 稳定同位素分析 摄食生态 蓝圆鲹 营养级 

分 类 号：S931.1[农业科学—渔业资源]