Marking Striped Bass with Rare Earth Elements
Non-radioactive rare earth elements (REE) were evaluated as potential markers in scales of hatchery-reared juvenile striped bass Marone saxatilis over a 12week feeding study. Uptake and retention levels of europium (Eu) and terbium (Tb) detected by neutron activation analyses at below 1 p,g/g could be related directly to dietary concentrations of the 2 elements and duration of feeding. Decreased relative concentrations following post-feeding could be related to scale mass increases and the inherent problem with detection techniques which analyze for amounts per unit mass. We compared our...
