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Heavy metal concentrations in fish of Lake Balaton

机译：巴拉顿湖鱼中重金属的浓度

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摘要

The concentration of heavy metals (cadmium, copper, lead, mercury and zinc) found in muscle, gills and liver of eel, bream and pike-perch living in Lake Balaton (Hungary) varied significantly between fish species and organs. The toxic metals in the muscle of fish, except for cadmium in bream, were below the maximum permissible level for human consumption. Cadmium concentrations above the maximum permissible level occurred in autumn in a few small individuals of bream, which, because they have poor culinary value and are seldom consumed, does not represent a risk for humans. Cadmium, copper, lead and zinc levels proved to be higher in eel and bream compared to pike-perch, while high mercury concentrations were found in the predator fish, pike-perch. Mercury accumulated most in the muscle in each species, while other metals were found in higher levels in the gills and liver. Seasonal differences were found for cadmium in each species and for lead in eel; the concentrations being elevated in autumn compared to spring. The fish species studied as bio-monitors demonstrated that the overall heavy metal pollution of Lake Balaton is not significant, although, during summer an increase of cadmium and lead loading could occur at the catchment area and in the lake. Studies on the size (age) dependency of heavy metal concentrations showed that, in most cases, none or a negative relationship exists for each organ and metal in all species studied, and a positive regression coefficient was characteristic only on some occasions for mercury, cadmium and lead.
机译：在巴拉顿湖（匈牙利）生活的鳗鱼，鱼和鲈鱼的肌肉，g和肝脏中发现的重金属（镉，铜，铅，汞和锌）的浓度在鱼类和器官之间差异很大。除鲷鱼中的镉外，鱼肉中的有毒金属均低于人类食用的最大允许水平。秋季，一些small鱼中的镉浓度超过最大允许水平，因为它们的烹饪价值不高且很少食用，对人类没有危险。事实证明，与鲈鱼相比，鳗鱼和，中的镉，铜，铅和锌含量更高，而在鲈鱼中，汞含量较高。在每个物种的肌肉中，汞最多，而在g和肝脏中发现的金属含量更高。发现每个物种中镉和鳗鱼中铅的季节性差异；与春季相比，秋季的浓度有所升高。作为生物监测器进行研究的鱼类物种表明，巴拉顿湖的总体重金属污染并不明显，尽管在夏季，集水区和湖泊中镉和铅的含量可能会增加。对重金属浓度的大小（年龄）依赖性的研究表明，在大多数情况下，所有研究物种中的每个器官和金属都不存在负相关或负相关，并且仅在某些情况下汞，镉才具有正回归系数的特征。和铅。

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  • 来源
    《Lakes & Reservoirs》 |2000年第4期|271-279|共9页
  • 作者

    A. Farkas; J. SalÁnki; I. Varanka;

  • 作者单位

    Balaton Limnological Research Institute of the Hungarian Academy of Sciences PO Box 35 8237 Tihany Hungary;

    Balaton Limnological Research Institute of the Hungarian Academy of Sciences PO Box 35 8237 Tihany Hungary;

    Balaton Limnological Research Institute of the Hungarian Academy of Sciences PO Box 35 8237 Tihany Hungary;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bio-monitoring; fish; heavy metals; Lake Balaton;

    机译：生物监测;鱼类;重金属;巴拉顿湖;

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