基于稳定同位素的江苏近海金乌贼摄食生态分析  

Feeding ecology of Sepia esculenta in Jiangsu coastal waters based on stable isotopes analysis

作　　者：周敏华 张虎[2] 刘必林[1,3,4,5] ZHOU Minhua;ZHANG Hu;LIU Bilin(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Jiangsu Marine Fisheries Research Institute,Nantong 226007,Jiangsu,China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai Ocean University,Shanghai 201306,China;National Engineering Research Center for Oceanic Fisheries,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Oceanic Fisheries Exploration,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]江苏省海洋水产研究所,江苏南通226007 [3]大洋渔业资源可持续开发教育部重点实验室,上海201306 [4]国家远洋渔业工程技术研究中心,上海201306 [5]农业农村部大洋渔业开发重点实验室,上海201306

出　　处：《上海海洋大学学报》2024年第1期202-210,共9页Journal of Shanghai Ocean University

基　　金：2022年度江苏省农业生态保护与资源利用专项-渔业生态与资源监测(2022-SJ-061-01);2021年度江苏省农业生态保护与资源利用专项-渔业生态与资源监测(2021-SJ-110-02)。

摘　　要：为进一步掌握江苏近海金乌贼(Sepia esculenta)种群生活史特征,根据在江苏沿海港口所采集的样本,利用碳氮稳定同位素分析法对金乌贼的摄食生态及营养生态位进行研究。结果表明,金乌贼雌、雄群体间δ13C和δ15N值均不存在显著性差异;金乌贼的δ13C值与胴长之间相关性不显著,δ15N值与胴长之间存在显著相关性;雄性金乌贼营养生态位宽度(SEAc=0.57‰2)与雌性(SEAc=0.63‰2)无明显差异,雌性略大于雄性,且两者高度重叠(0.62)。同位素聚类分析显示,可将金乌贼个体分为75~114 mm、115~184 mm和185~204 mm等3个胴长组;185~204 mm胴长组营养生态位宽度最大(SEAc=1.77‰2),75~114 mm胴长组营养生态位宽度最小(SEAc=0.39‰2);仅75~114 mm和115~184 mm胴长组间生态位重叠率为中度重叠(0.34),其余胴长组间生态位重叠率低。分析认为,金乌贼δ13C值的变化主要受同位素基线值和金乌贼洄游模式影响,而δ15N值的变化主要受金乌贼摄食作用影响;雌性和雄性金乌贼群体之间食物资源和栖息地利用高度相似;不同发育阶段的金乌贼在营养生态位上具有明显差异。In order to further understand the characteristics of the life history of the Sepia esculenta population in the coastal waters of Jiangsu,the feeding ecology and nutritional niche of the Sepia esculenta were studied by using the carbon and nitrogen stable isotope analysis method based on the samples collected in the coastal ports of Jiangsu.The results showed that there was no significant difference inδ13C andδ15N values between male and female populations of Sepia esculenta;There was a significant correlation between them;the nutritional niche width of male Sepia esculenta(SEAc=0.57‰2)was not significantly different from that of females(SEAc=0.63‰2),and females were slightly larger than males,and both are highly overlapping(0.62).Isotopic cluster analysis showed that Sepia esculenta individuals could be divided into three mantle length groups of 75-114 mm,115-184 mm and 185-204 mm;The niche width of the 114 mm mantle length group was the smallest(SEAc=0.39‰2);only the niche overlap rate between the 75-114 mm and 115-184 mm mantle length groups was moderate(0.34),and the niche overlap rate among the other mantle length groups was low.According to the analysis,the change ofδ13C value of Sepia esculenta was mainly affected by the isotope baseline value and the migration pattern of Sepia esculenta,while the change ofδ15N value was mainly affected by the feeding effect of Sepia esculenta;the height of food resources and habitat utilization between female and male golden squid groups were highly similar;Sepia esculenta at different developmental stages had obvious differences in nutritional niche.

关 键 词：金乌贼 江苏近海 稳定同位素 营养生态位 

分 类 号：S931.1[农业科学—渔业资源]