Distribution of selected metals in tissue samples of carp,Cyprinus Carpio

Rehwoldt, Robert; Karimian-Teherani, Davoud; Altmann, Hans

doi:10.1007/bf01812651

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…Has-Schön et al (2008). Significantly higher concentrations (P < 0.01) of Cu and Zn in the kidney compared to other organs were reported by Rehwoldt et al (1976) and Svobodová et al (2002). Higher zinc concentrations have also been found in the liver, kidney and ovaria.…”

Section: Zincmentioning

confidence: 71%

Concentrations of Metals in Tissues of Fish from the Věstonice Reservoir

et al. 2010

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The aim of the present work was to compare the distribution of selected metals in tissues of several fish species caught in the Věstonice reservoir. The hygienic quality of fish meat was assessed with respect to the mercury concentration. A total of 35 fish of the following species were caught: carp (Cyprinus carpio), bream (Abramis brama), asp (Aspius aspius), pikeperch (Sander lucioperca) and pike (Esox lucius). Samples of muscle, liver (hepatopancreas), kidney, gonads and gills were analyzed. Hg, Pb, Cd, Cu, Zn and Cr concentrations in fish tissues were determined by the AAS. The results showed that different metals differ in their affinity to different fish tissues (e.g. Cu -liver, Cd -kidney). Mercury concentrations along the food chain increase, i.e. higher mercury concentrations are found in predatory fish. Contrary to mercury, cadmium and lead concentrations do not show any increases along the fish part of food chain in surface water ecosystems. In predatory fish, lower concentrations of these metals were found than in nonpredatory fish species. Differences in concentrations between ovaria and testes were found only in Cu and Zn. To evaluate possible health risks of mercury concentrations for consumers, the risk index was calculated and maximum admissible amounts of muscle meat for consumption were determined. The results confirmed good hygienic quality of market-ready fish from the Věstonice reservoir. Predatory fish, non-predatory fish, heavy metals, AAS, risk indexThe rising living standards of human population take their toll in increasing loads to the environment with various contaminating substances that occur naturally at very low concentrations, or do not naturally occur at all. Besides metal manufacturing and processing, the sources of environmental metal contamination include industrial waste products, the burning of fossil fuels, and the use of metals by consumers. The increase in metal concentrations in the environment is further enhanced by their poor degradability resulting in metal accumulation in the soil, water sediments and the food chain (Svobodová et al. 1987).As the final link of the food chain in the aquatic environment, fish are an important indicator of contamination by a number of substances, including metals (Svobodová et al. 1996). Moreover, toxic metal concentrations in fish are monitored also in terms of food safety (Svobodová et al. 2004). First and foremost, the most closely monitored potentially toxic metals include mercury followed by cadmium and lead. In recent years, food safety has been a priority in EU member states. Hence, the large number of regulations targeting veterinary food hygiene that are being adopted mainly by the European Food Safety Authority (EFSA) and other organisations. At present, hygienic limits are determined by the highest acceptable levels of contaminants in foodstuffs in the Commission Regulation 1881/2006/EC as amended and Decrees 68/2005 Sb. and 305/2004 Sb. of the Ministry of Health. As far as fish as food animals are concerned, the m...

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Section: Zincmentioning

confidence: 71%

Concentrations of Metals in Tissues of Fish from the Věstonice Reservoir

et al. 2010

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“…importance of the pathway of direct contamination with respect to the trophic pathway as proved by several studies 20,24 . According to Rehwold et al 25 , the presence of high levels of metals in the gills in the natural environment can be attributed to the presence and adsorption of metals at the gills (sedimentation); rather than a biological activity (bioaccumulation) caused by these metals 26 . However, work carried out in the Aby lagoon (Ivory Coast) by Yapi et al 27 on the Sarotherodon melanotheron species gave contrary results.…”

Section: Discussionmentioning

confidence: 99%

Metal Contamination of Ethmalosis (Ethmalosa fimbriata Bowdich, 1825) In the Bietri Bay (Ebrie Lagoon, Côte D'Ivoire).

2019

jcbsc

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The objective of this study is to determine the organotropism of four trace elements (Cd, Zn, Pb, As) and their concentrations in two organs (gills, muscles) of ethmalosis (Ethmalosa fimbriata) collected from Biétri Bay. The concentrations of the trace elements were determined by adsorption spectrophotometry. The results showed that the bioaccumulation of the measured metals is more important in the gills than in the muscles. For all four trace elements analyzed, Biétri Bay samples showed higher average concentrations than samples from Vitré 2, a control site. These high concentrations observed in the Biétri Bay samples indicate a heavy contamination of this zone. The average levels of cadmium (0.97 mg / kg dry weight), lead (5.23 mg / kg dry weight) and Arsenic (2.34 mg / kg dry weight) are higher than the standards set by ABNORM for samples from Biétri Bay. The consumption of these fish could therefore constitute a danger for human health. On the other hand for these same heavy metals, the average concentrations recorded in the muscle of the fish caught in Vitré 2 (Cd = 0.16mg / kg of dry weight, Pb = 0.87mg / kg of dry weight, As = 0.59 mg / kg of weight dry) are below standard.

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“…Variations observed in the levels of heavy metals between the wet and drier months could be attributable to the diluting effects of precipitations during the wet season (Olaleye, 2005). The gill accumulated Cu and other metallic ions probably because of the close proximity between it and external environment as the blood vessels on the gill filament present a large exposed surface area to the water environment (Rehnoldt, Karimian‐Teherani & Altmann, 1976). Accumulation of Cu in the gill has also been linked to its ability to bind to haemopoitic tissues, mucous and metallothioneins cells associated with excretion and detoxification (Cardeilhac et al.…”

Section: Discussionmentioning

confidence: 99%