...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Agricultural and Food Chemistry >Bloaccumulation potential of dietary arsenic, cadmium, lead, mercury, and selenium in organs and tissues of rainbow trout (Oncorhyncus mykiss) as a function of fish growth
【24h】

Bloaccumulation potential of dietary arsenic, cadmium, lead, mercury, and selenium in organs and tissues of rainbow trout (Oncorhyncus mykiss) as a function of fish growth

机译：虹鳟（Oncorhyncus mykiss）的器官和组织中膳食砷，镉，铅，汞，硒的血铅积累潜力与鱼类生长的关系

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The distribution and potential bioaccumulation of dietary arsenic, cadmium, lead, mercury, and selenium in organs and tissues of rainbow trout (Oncorhyncus mykiss Walbaum, 1792), a major aquaculture species, was studied in relation to fish growth over a period of >3 years. Fish were reared under normal farming conditions, that is, fed a standard fish food and exposed to negligible levels of waterborne trace elements. The age-related variations in the content of each trace element in gills, kidney, liver, muscle, and skin were studied through nonparametric regression analysis. A buildup of all elements in all tissues and organs was observed, but due to dilution with growth, the concentrations did not increase, except in a few cases such as cadmium and mercury in liver and kidney. In muscle tissue, the concentrations of mercury, lead, and selenium did not alter significantly with growth, whereas cadmium increased but remained at exceedingly low levels. The concentration of arsenic in muscle tissue peaked at 14 months and then decreased in adult specimens. Arsenic speciation by high-performance liquid chromatography-inductively coupled plasma mass spectrometry revealed that arsenic in muscle was almost exclusively present in the form of nontoxic arsenobetaine. Application of a mercury mass balance model gave predicted concentrations in agreement with measured ones and showed that in farmed rainbow trout the ratio of mercury concentrations in feed and in fish is about 1:1. Therefore, rainbow trout does not approach the limits established for human consumption even when reared with feed at the maximum permitted levels. These findings highlight the low bioaccumulation potential of toxic trace elements such as cadmium, lead, and mercury in rainbow trout following dietary exposure. On the other hand, selenium concentrations in muscle (about 0.2 mu g g(-1) of fresh weight) show that rainbow trout may be a good source of this essential element.
机译：研究了虹鳟鳟鱼（Oncorhyncus mykiss Walbaum，1792）（一种主要的水产养殖品种）的器官和组织中膳食砷，镉，铅，汞和硒的分布及其潜在的生物蓄积，其与> 3时期的鱼类生长有关年份。在正常养殖条件下养鱼，即喂食标准鱼类食品，并使其水平可忽略不计的水性痕量元素。通过非参数回归分析研究了腮，肾脏，肝脏，肌肉和皮肤中各微量元素含量的年龄相关变化。观察到所有组织和器官中所有元素的积累，但是由于随着生长的稀释，其浓度没有增加，除非在少数情况下，例如肝脏和肾脏中的镉和汞。在肌肉组织中，汞，铅和硒的浓度不会随生长而显着变化，而镉会增加，但保持在极低的水平。肌肉组织中的砷浓度在14个月达到峰值，然后在成年标本中下降。通过高效液相色谱-电感耦合等离子体质谱法进行的砷形态分析表明，肌肉中的砷几乎仅以无毒的甜菜碱形式存在。汞质量平衡模型的应用得出的预测浓度与测得的浓度一致，表明在养殖的虹鳟鱼中，饲料和鱼类中的汞浓度比约为1：1。因此，即使以最大允许水平饲养饲料，虹鳟也不会达到为人类食用而建立的极限。这些发现凸显了饮食中虹鳟鱼中镉，铅和汞等有毒微量元素的生物富集潜力较低。另一方面，肌肉中的硒浓度（鲜重约0.2微克g（-1））表明虹鳟鱼可能是这种必需元素的良好来源。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号