摘要
长蛇鲻(Saurida elongate)为温水性近海底栖鱼类,是目前海州湾的优势鱼种之一,在海州湾食物网中占据重要地位。本研究基于海州湾底拖网调查采集的样品,结合胃含物分析和碳、氮稳定同位素技术,分析了长蛇鲻的摄食习性。结果表明:海州湾长蛇鲻摄食的主要饵料生物为戴氏赤虾、枪乌贼、长丝虾虎鱼、鳀、六丝钝尾虾虎鱼、细条天竺鲷、尖海龙和绯鱼衔。其δ13C值范围在-19.39‰^-16.23‰之间,平均值为(-18.01±0.85)‰,与体长无显著相关性;δ15N值范围在9.56‰~13.36‰之间,平均值为(11.77±0.86)‰,与体长呈显著正相关。长蛇鲻不同体长组的饵料生物贡献度差异较大,随着体长增加,其捕食能力增强、摄食器官逐渐完善、摄食饵料生物的比例发生变化,可能是导致其摄食习性随体长变化的主要原因。本研究有助于深入了解海州湾长蛇鲻的摄食生态,为海州湾食物网营养动力学研究提供了基础资料。
Saurida elongata,a warm-water offshore benthic fish,is one of the dominant species in Haizhou Bay and plays an important role in the food web.Based on samples collected from bottom trawl surveys in Haizhou Bay,we examined the feeding habits of Saurida elongata based on both stomach content and stable isotope analyses.The results showed that the main prey species of Saurida elongata were Metapenaeopsis dalei,Loligo spp.,Cryptocentrus filifer,Engraulis japonicus,Chaeturichthys hexanema,Apogonichthys lineatus,Syngnathus acus and Callionymus beniteguri.The range ofδ13C value was-19.39‰to-16.23‰,with an average value of(-18.01±0.85)‰.There was no correlation between body length andδ13C values.The value ofδ15N ranged from 9.56‰to 13.36‰,with an average value of(11.77±0.86)‰,which was significantly positively correlated with body length.There was substantial difference in the contribution of food organism among diffe-rent body length groups.With the increases of body size,predation ability and morphology of feeding organs gradually improved,and the proportion of prey organisms changed,which might be the main reason for the ontogenetic variation in feeding habits.This study could contribute to understand the feeding ecology of snake mullet in Haizhou Bay and provide basic information for the nutritional dynamics of the Haizhou Bay food web.
作者
高元新
隋昊志
任晓明
徐宾铎
张崇良
任一平
薛莹
GAO Yuan-xin;SUI Hao-zhi;REN Xiao-ming;XU Bin-duo;ZHANG Chong-liang;REN Yi-ping;XUE Ying(College of Fisheries,Ocean University of China,Qingdao 266003,Shandong,China;Functional Laboratory for Marine Fisheries Science and Food Production Processes,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,Shandong,China;Field Observation and Research Station of Haizhou Bay Fishery Ecosystem,Ministry of Education,Qingdao 266003,Shandong,China)
出处
《应用生态学报》
CAS
CSCD
北大核心
2020年第12期4277-4283,共7页
Chinese Journal of Applied Ecology
基金
国家重点研发计划项目(2017YFE0104400)
国家自然科学基金项目(31772852)
山东省支持青岛海洋科学与技术试点国家实验室重大科技专项(2018SDKJ0501-2)资助。
关键词
长蛇鲻
胃含物分析
稳定同位素
营养级
摄食习性
海州湾
Saurida elongate
stomach content analysis
stable isotope analysis
trophic level
feeding habit
Haizhou Bay
