Characteristics of C and O stable isotope in otolith of juvenile Coilia nasus from the Changjiang River Estuary
For better understanding of the characteristics of stable carbon (δ13C) and oxygen (δ18O) isotopes in the otolith ofCoilia nasusand the possible ecological significances, the analysis of otolith stable isotope ratios ofδ13C andδ18O was conducted using an isotope ratio mass spectrometry onC. nasus juveniles collected from the Chang-jiang River Estuary. The otolith revealedδ13C andδ18O values of –12.1±1.8(‰VPDB) and –7.9±1.2 (‰VPDB), respectively. Unlikeδ18O,δ13C generally varied in a relatively wide range. Two groups of the fish could be sepa-rated based on scattered distribution by otolithδ13C andδ18O values of allC. nasus individuals in the present study, suggesting possible different natal origins (i.e. spawning/nursery areas) in the Changjiang River. The different en-vironments with different water temperature and food organism composition might be experienced by the two groups ofC. nasus fish.
国家科技期刊平台
NSTL
万方数据
维普
