环境因子对大黄鱼耳石钡元素富积的影响  

Effects of environmental factors on otolith Ba element incorporation in juvenile Larimichthys crocea

作　　者：黎雨轩[1] 徐浩[1,2] 张翼[1] 张辉[1] 徐献明[3] 李圣法[1] 

机构地区：[1]中国水产科学研究院东海水产研究所农业部东海与远洋渔业资源开发利用重点实验室,上海200090 [2]上海海洋大学海洋科学学院,上海201306 [3]江苏省海洋水产研究所,南通226007

出　　处：《海洋渔业》2014年第5期409-417,共9页Marine Fisheries

基　　金：国家自然科学基金青年基金(31101901);中央级公益性科研院所基本科研业务费专项资助项目(2011M11)资助

摘　　要：通过设计3个温度(18℃、22℃、26℃)×3个盐度(17、25、34)×3个锶(Sr)元素组(低、中、高)来研究环境因子对大黄鱼(Larimichthys crocea)耳石中钡(Ba)元素沉积的影响。研究结果表明:温度、盐度和锶元素含量对耳石钡分配系数具有显著的影响,盐度的影响最大,锶元素的影响其次,温度的影响最小,温度和盐度对耳石钡分配系数具有显著的交互作用。在所有试验组中,耳石钡分配系数均随着盐度的增加而增加,随着水中Ba/Ca值的增加而减少,而耳石Ba/Ca值随着水中Ba/Ca值的增加而增加。盐度是影响大黄鱼耳石Ba/Ca值的主要因素,温度和锶元素的影响都很小,盐度对耳石Ba/Ca值的影响主要是因为水中Ba/Ca值随盐度的降低而增加。所有试验组中耳石Ba/Ca值均随着盐度的增加而降低,根据盐度与耳石Ba/Ca值的定量关系就可以反演大黄鱼所经历的盐度史。Using controlled laboratory experiments,juvenile big yellow croakers were reared in aquaria of various temperatures,salinities and strontium concentration by a three-factor experimental design：temperature （18 ℃,22 C,26 ℃） × salinity （17,25,34） × strontium level （low,medium,high）.Temperature,salinity and strontium concentration were found to have significant effects on Ba/Ca ratios and partition coefficients of Ba/Ca （DBa） in otoliths.The factors influencing DBa in otoliths ranged：salinity ＞ Sr/Ca in the water ＞ temperature.Temperature and salinity interacted to influence DBa.In all treatments,DBa increased with the increase of salinity and decreased with the increase of Ba/Ca ratios in the water.But Ba/Ca ratios in otoliths increased with the increase of Ba/Ca ratios in the water.Salinity was the major factor influencing Ba/Ca ratios in otoliths of large yellow croakers,due to the increasing Ba/Ca ratios in water with lower salinity,and the influence of temperature and strontium concentration was very small.In all treatments,Ba/Ca ratios in otoliths decreased with the increasing salinity.The salinity history experienced by large yellow croakers could be deduced according to the quantitative relationships between salinity and Ba/Ca ratios in otoliths.

关 键 词：大黄鱼 耳石 元素 钡 温度 盐度 

分 类 号：S917[农业科学—水产科学]