TITLE:
Bioaccumulation of Trace Metals in Tissues of Rohu Fish for Environmental Risk Assessment
AUTHORS:
Nazima Noor, Bela Zutshi
KEYWORDS:
Lake Water, Trace Metals, L. rohita, Tissues, Bioaccumulation
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.8 No.4,
April
29,
2016
ABSTRACT: In the present study, the two lakes, Vengaiah
lake (Lake A-Sewage polluted receiving discharge from storm water drain) and Yellamallappa
Chetty lake (Lake B-Industrially polluted) situated near Krishnarajpuram-Hoskote
taluk, Bangalore, Karnataka were selected for analysis of trace metals viz., arsenic,
aluminium, cadmium, lead, mercury, iron, copper and zinc in water samples. Muscle
and gill tissues of freshwater fish Labeo
rohita reared in these water bodies were analysed for bioaccumulation of trace
metals. Hebbal fish farm was considered as a reference site (Control site) for water
and fish samples. Trace metals were analysed by atomic absorption spectroscopy and
values were compared with those recommended by FAO/WHO in water and fish samples.
Trace metals such as Al, As and Hg were detected in the water sampled from lake
B which is attributed to the differences in the sources of pollutants. Fish tissues
viz., muscle and gills sampled from Lake B exhibited high concentration of Al, Pb
and Cd content showing a positive correlation with their concentration in water
samples. The remaining metals as Cu, Zn and Fe were detected in water sampled from
all water bodies and also in the fish tissues. Gills exhibited higher concentration
of metals in fish from lake B. Bioaccumulation of these trace metals in fish tissues
may cause potential danger to human health when consumed on regular basis. Thus
necessary remedial measures are required to combat water contamination and its management
keeping in view the aquatic ecosystem and public health. Values were statistically
significant at P