Accumulation of Metals in Juvenile Carp (Cyprinus carpio) Exposed to Sublethal Levels of Iron and Manganese: Survival, Body Weight and Tissue

Harangi, Sándor and Baranyai, Edina and Fehér, Milán and Tóth, Csilla Noémi and Herman, Petra and Stündl, László and Fábián, István and Tóthmérész, Béla and Simon, Edina (2016) Accumulation of Metals in Juvenile Carp (Cyprinus carpio) Exposed to Sublethal Levels of Iron and Manganese: Survival, Body Weight and Tissue. BIOLOGICAL TRACE ELEMENT RESEARCH, 177. pp. 187-195. ISSN 0163-4984

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Abstract

Many oxbows are contaminated by Fe and Mn as a consequence of the elemental concentration of sediment and water originating from the Upper Tisza Region of Hungary. The phenomenon is partly caused by anthropogenic activities and mainly due to the geochemical characteristics of the re- gion. The effects of Fe and Mn on the aquatic ecosystem of these wetlands were investigated in a model experiments in this study. Survival, individual body weight and the elemental concentrations of organs were determined in common carp ( Cyprinus carpio) juveniles reared in Fe and Mn contaminated media (treatment 1: Fe 0.57 mg L − 1 ,Mn0.29mgL − 1 ,treat- ment 2: Fe 0.57 mg L − 1 , Mn 0.625 mg L − 1 , treatment 3: Fe 1.50 mg L − 1 ,Mn0.29mgL − 1 , treatment 4: Fe 1.50 mg L − 1 , Mn 0.625 mg L − 1 and control: Fe 0.005 mg L − 1 ,Mn 0.003 mg L − 1 ), for rearing time of 49 days. The treatment with Fe and Mn did not have any effect on the survival data and individual body weight in the levels tested. The highest con- centration of Fe and Mn was found in the liver and brain of carp juveniles, while the lowest concentration of these ele- ments occurred in the muscular tissue and gills. The treatment where Fe and Mn were applied in the highest concentrations resulted in a statistically higher level of these elements in the brain, grills and muscle tissues. The treatment where only Mn was present in the highest concentration caused increased lev- el of Mn only in the liver. We found metal accumulation in almost every organ; however, the applied concentrations and exposure time did not affect the survival and average body weight of carp juveniles.

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