水生生物学报2026，Vol.50Issue(4)：12-18,7.DOI:10.3724/1000-3207.2025.2025.0343
大麻哈鱼幼鱼耳石碳、氧同位素特征
OTOLITH CARBON AND OXYGEN ISOTOPIC SIGNATURES OF JUVENILE CHUM SALMON(ONCORHYNCHUS KETA)
摘要
Abstract
To investigate the role of carbon(δ13C)and oxygen(δ18O)stable isotopes in juvenile otoliths for identifying chum salmon(Oncorhynchus keta)groups,this study analyzed cultured and wild juvenile chum salmon groups(under 1 year old)using stable isotope mass spectrometry.The results showed that the mean δ18O and δ13C values in otoliths of the cultured group were(−10.33±0.30)‰ and(−8.60±0.45)‰,while those of the wild group were(−9.90±0.34)‰ and(−11.76±0.65)‰,respectively.Significant differences in otolith stable isotopes were observed between the two groups,primarily attributed to distinct freshwater habitat conditions experienced during their early life stages.By analyzing the correlation between δ18O and δ13C in juvenile chum salmon otoliths,cultured and wild juveniles were successfully discriminated,demonstrating the feasibility of juvenile otolith isotopes for tracing the origin of migratory adult chum salmon.This approach also provides a scientific basis for evaluating the effectiveness of artificial stock enhancement and its ecological impact on wild groups.关键词
耳石/δ13C/δ18O/群体鉴别/大麻哈鱼Key words
Otolith/δ13C/δ18O/Group identification/Chum salmon分类
生物科学引用本文复制引用
王安琪,李培伦,熊书涵,王继隆..大麻哈鱼幼鱼耳石碳、氧同位素特征[J].水生生物学报,2026,50(4):12-18,7.基金项目
中国水产科学研究院基本科研业务费(2023TD07) （2023TD07）
黑龙江省自然科学基金(YQ2019C034) （YQ2019C034）
农业农村部财政专项(2130135)资助[Supported by the Central Public-interest Scientific Institution Basal Research Fund,CAFS(2023TD07) （2130135）
the Natural Science Foundation of Heilongjiang Province of China(YQ2019C034) （YQ2019C034）
Special Financial Funds of Species Resources Conservation Project of the Ministry of Agriculture and Rural Affairs of China(Investigation and Evaluation of Chum Salmon Resources)(2130135)] （Investigation and Evaluation of Chum Salmon Resources）
