Fish as a bioindicator of heavy metals pollution in aquatic ecosystem of Pluszne Lake, Poland, and risk assessment for consumer's health

• Published in: Ecotoxicology and environmental safety Vol. 153; pp. 60 - 67
• Main Authors: Łuczyńska, Joanna, Paszczyk, Beata, Łuczyński, Marek J.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Inc 30.05.2018
• Subjects: FCF; Fish; GSI; Health risk; Heavy metals; HSI; FCF; Fish; GSI; Heavy metals; HSI; Health risk
• ISSN: 0147-6513; 1090-2414
• DOI: 10.1016/j.ecoenv.2018.01.057

Heavy metals content (Zn, Cu and Hg) were measured in gills, liver, gonads and muscles of perch, Perca fluviatilis (L.) and roach, Rutilus rutilus (L.) from Lake Pluszne (north-eastern Poland). Correlations between heavy metals levels and total length, weight, HSI, GSI and FCF were examined. As expected, muscles contained the significantly highest values of Hg (P ≤ .05). The concentrations of Zn were significantly higher in gills of roach and gonads of perch (P ≤ .05), while the liver of fish accumulated significantly more Cu than other organs (P ≤ .05). In all organs of perch the higher content of mercury was found (P ≤ .05). The value of Zn and Cu was highest in organs of roach (P ≤ .05) (with the exception of Zn in muscles P > .05). Sequence of metals in both species was Zn > Cu > Hg. Only in muscle tissue, Hg was significantly positive correlated with weight of roach (r = 0.811, P = .045) and perch (r = 0.652, P = .041), and total length of roach (r = 0.806, P = .005). A positive relationship was also observed between Zn concentration in gills of perch and their weight (r = 0.634, P = .049). In contrary, Zn in gills of roach decreased with weight (r = −0.693, P = .026)) and length (r = −0.668, P = .035). Cu concentration in liver of perch was statistically positively correlated with HSI (r = 0.717, P = .020), whereas Hg content in muscle tissue of roach with FCF (r = 0.643, P = .045). There was negative relationship between Hg in perch gonads and GSI (r = −0.808, P = .005). Metal pollution index (MPI) in gills, liver, gonads and muscles of roach was 7.68, 7.24, 6.77 and 3.13, respectively, whereas in these organs of perch was 3.25 (gills), 4.75 (liver), 5.84 (gonads) and 4.44 (muscles), therefore the contamination of each tissue ranged from very low contamination to low contamination. The concentration of mercury was lower than the maximum acceptable limit estimated by the Commission Regulation (EC) No 629/2008 of 2 July 2008. The values of HI and THQ were below 1, which means that consumption of these fish is not hazardous to the consumer. •The organs of roach contained more zinc and copper than the same organs of perch.•The organs of perch characterized higher mercury content than organs of roach.•THQ and HI were below 1, therefore fish is not hazardous to the consumer.•Mercury content was below the maximum acceptable level of 0.05 mg/kg.•Fish species and their organs can be good indicators of water quality.