Department of Geological Sciences, University of Manitoba, Winnipeg MB R3T 2N2, Canada.
Environ Sci Technol. 2010 Mar 1;44(5):1551-8. doi: 10.1021/es903261q.
Determining the effects of mining activity on fish populations is complicated by the uncertainty of fish residency in an affected area. Otoliths are considered to be metabolically inert and can contain complete chemical records of environments in which individuals have lived. When coupled with the annular structure, otoliths provide temporal information to the history of exposure to pollutants. In this preliminary study, northern pike and walleye otoliths collected from two lakes adjacent to base metal mine tailings at Lynn Lake, Manitoba, Canada, were analyzed using laser ablation inductively coupled plasma mass spectrometry to determine background levels of trace metals. The presence of overlapping Zn, Cu, and Pb peaks above background levels in some otoliths is interpreted as a record of elevated levels in the environment. These otoliths provided a record of the history of fish movement into and out of the affected area.
确定采矿活动对鱼类种群的影响很复杂，因为鱼类在受影响地区的居留情况存在不确定性。耳石被认为是代谢惰性的，可以包含个体生活过的环境的完整化学记录。当与环形结构结合使用时，耳石为个体接触污染物的历史提供了时间信息。在这项初步研究中，使用激光烧蚀电感耦合等离子体质谱法分析了从加拿大马尼托巴省 Lynn Lake 的两个毗邻基本金属矿尾矿的湖泊中采集的北方狗鱼和大眼狮鲈的耳石，以确定痕量金属的背景水平。一些耳石中 Zn、Cu 和 Pb 峰的存在高于背景水平，这被解释为环境中水平升高的记录。这些耳石记录了鱼类进出受影响地区的历史。
