鱼耳石的成因矿物学属性:环境标型及其研究新方法

THE GENETIC MINERALOGICAL ATTRIBUTE OF FISH OTOLITHS:ENVIRONMENTAL TYPOMORPHISM AND SOME NEW INVESTIGATION METHODS

鱼耳石是鱼类头骨两侧的组织器官,是典型生命矿物文石的载体,发育明显的环带结构。其环带数和韵律层厚度反映鱼龄和鱼体生长速率;其δ18O值能指示水体温度。利用环带的几何学特征、颜色、常量和微量元素特征与氧同位素和碳同位素组成结合,可有效地鉴别鱼的种群结构,追索鱼的源区、迁移习性、营养水平,记录水体环境的变迁,预测未来水体环境变化趋势,指导渔业生产战略布局。本文首次开发的鱼耳石之文石纳米形貌和热发光参数,可有效地指示相应水体的环境特征,用于进行不同来源区的判别和鱼类资源管理。

Otolith is a typical biomineral carrier developed on both sides of fish head bone with prominent zoning structure.The zoning number and thickness of the rhythmic zone can reflect the age and growing velocity. The 81SO values of the zones are indicators of water temperature at which the fish lives. The geometry, color, major and trace elements, oxygen and carbon isotopes of the zones can be employed effectively to classify the species, to trace the source, transferring habits,nutrition level of the fish, and the variation of the ocean environment, to predict the environmental variation trend of related waters, and to make a strategic plan for fishery production, The thermolumineseenee technique can be used as a new tool in the investigation of fish otoliths to describe the heavy metal pollution of related waters, and the thermoluminescence parameters can be used to deduce the source and manage fishery resources.