白洋淀和密云水库野生鲤鱼耳石热释光特征研究

he major composition of the otliths is biomineral aragonite. In the past two or three decades, quite a few achievements have been made in the research of fish otoliths, however, the study on the thermoluminescence characteristics of the fish otoliths has not been reported in the literatures. The thermoluminescence characteristics of otoliths of the wild carps (cyprinoid) living in the Baiyangdian Lake of Hebei Province and Miyun reservoir of Beijing Municipality has been studied , and the difference of energy gap(E) between the fish otoliths has been analyzed in this paper. The experimental result indicates that Glow peak (T), Thermoluminescence intensity (I), Integral（S）and Half width (W) of the fish otoliths from Baiyangdian Lake are greater than those from Miyun reservoir, and the stability of the formers’ thermoluminescence value and energy gap(E) is weaker than the latters’. In compare with the Miyun reservoir, the analysis manifest that the electrons and vacancies in the otoliths of Baiyangdian Lake are more likely to escape. According to the investigation, the contaminative degree and eutrophication in the water of Baiyangdian Lake is heavier than that of Miyun reservoir. So the thermoluminescence characteristics of the fish otoliths is quite sensitive to contaminated and non-contaminated water, and it can be regarded as an important mark of the contaminative degree of the water.