Estimating turnover rates of d 13 C and d 15 N in muscle, heart and liver tissue of juvenile sand gobies ( Pomatoschistus minutus )

Large numbers of marine fish typically enter and remain within estuaries during their juvenile life stage. Stable isotopes of carbon and nitrogen can serve to trace these individual movements due to the food web differences among marine and estuarine habitats. Here, we present the background for the utilization of d13C and d15N to analyze the migration dynamics of juvenile sand gobies ( Pomatoschistus minutes ), between the North Sea and the Scheldt estuary. The isotopic turnover of P. minutes , defined as the change in isotopic composition due to growth and metabolic tissue replacement, was e... Mehr ...