Micro-Chemical Characteristics of Carp Otoliths and Their Typomorphic Significance in the Evaluation of Water Quality in Lakes and Reservoirs——As Exemplified by the Baiyangdian Lake, Hebei Province and the Miyun Reservoir, Beijing
Trace elements in otoliths of the wild carps (cyprinoid) from the Baiyangdian Lake of Hebei Province and the Miyun Reservoir in the Beijing metropolitan were quantitatively analyzed. The contents of trace elements in otoliths of wild carps growing up in the BaiyangdianLake are higher than in the Miyun Reservoir. The phenomenon indicates that the environment of the BaiyangdianLake is more complex and more seriously polluted than that of the Miyun Reservoir. The concentration coefficients of trace elements in otoliths follow the increasing order of Zn>Sr>Se>Fe>As>Ba>K>Co>Au>Na>Cr. The contents of trace elements in otoliths and water from the BaiyangdianLake and Miyun Reservoir have a linear correlation.