水产学报2025，Vol.49Issue(8)：85-94,10.DOI:10.11964/jfc.20221113818
基于胃含物分析和稳定同位素研究曼氏无针乌贼的摄食生态
Feeding ecology of Sepiella maindroni based on stomach contents analysis and stable isotope
摘要
Abstract
Sepiella maindroni was once an important economic species along the coast of China,but its resources were exceed-ingly depleted due to unreasonable exploitation,in addition,the natural habitat of S.maindroni is also being destroyed.To pre-vent resource recession,relevant departments were restored by enhancing and releasing conservation measures.After several years of efforts,preliminary signs of resource recovery were observed.In order to understand the feeding conditions of S.main-droni after resource changes,278 samples were collected from Zhongjieshan Islands in October 2021,and their feeding habits were analyzed by stomach contents.The results of stomach contents showed that the S.maindroni mainly feed on seven groups,including fish,shrimp,and so on,among which shrimp account for the largest proportion(IRI=45.04%),followed by fish(IRI=26.74%)and crab(IRI=24.37%).Stable isotope was also used to analyze S.maindroni for revealing the long-term feed-ing patterns.The δ13C values of the S.maindroni ranged from-18.21‰ to-15.85‰,with an average value of-17.01‰±0.68‰.The δ15N values ranged from 8.19‰ to 12.28‰,with an average value of 10.18‰±1.01‰.Pearson analysis showed that the δ13C value of muscle was not significantly correlated with the mantle length,but the δ15N value was significantly positively correlated with the the mantle length(P<0.01).According to the δ15N value,the average trophic level of the S.maindroni in the Zhongjieshan Islands was 3.34±0.31.Stable isotope values showed that the contribution rate of food source from high to low is Zooplankton,Cephalopod,Crustaceans,fish and Shellfish.As the mantle length changed,the S.maindroni tended to feed on higher trophic level baits,such as fish and Cephalopods.S.maindroni has extensive feeding habit,moreover,it also has to do with the species richness of the ocean where it lives.With the development of the individual,the feeding organs and digestive organs gradually mature,and the activity and feeding ability are enhanced,and the predation abil-ity is stronger.The bait organisms tend to be small fish and Cephalopods.In this study,the ecological characteristics of S.main-droni in the waters of Zhongjieshan Islands were described,which can provide basic information for the resource recovery of this species and the structural characteristics of the food web in this area.关键词
曼氏无针乌贼/胃含物分析/稳定同位素/摄食生态/营养级Key words
Sepiella maindroni/stomach contents analysis/stable isotope/feeding ecology/trophic level分类
农业科技引用本文复制引用
杨凡,刘明智,蒋日进,印瑞,李鹏飞,梁君,徐开达,周永东,徐汉祥..基于胃含物分析和稳定同位素研究曼氏无针乌贼的摄食生态[J].水产学报,2025,49(8):85-94,10.基金项目
浙江近海重要经济种产卵场调查与评价(HYS-CZ-202329) （HYS-CZ-202329）
浙江省渔场渔业资源动态监测调查(HYS-CZ-202314) Investigation and Evaluation of Important Economic Spawning Grounds in the Nearshore Waters of Zheji-ang(HYS-CZ-202329) （HYS-CZ-202314）
Dynamic Monitoring and Survey of Fisheries Resources in Zhejiang Province Fishing Grounds(HYS-CZ-202314) （HYS-CZ-202314）
