Distributions of metals in the food web of fishponds of Kolleru Lake, India.
The distributions of trace metals (Pb, Cd, Cr Mn, Zn and Cu) in water, sediment, plankton and four fish species (Labeo rohita, Catla catla, Pangasius pangasius and Cirrhinus mrigala) from fishponds of Kolleru Lake, India were determined using atomic absorption spectroscopy. The concentrations of lead (0.01-0.03mg/l) and copper (0.01-0.08mg/l) in water and cadmium (3.0-9.0mg/kg), chromium (47-211mg/kg) and copper (10-64mg/kg) in sediment were above the EPA threshold effects level (TEL) and are of biological concern. The abundance orders of metals were Mn>Cd>Cu>Pb in water, Mn>Cr>Zn>Cu >Pb>Cd in sediment and Cu>Mn>Cr>Zn>Pb>Cd in plankton. The concentrations of the metals in the muscles of these four fish species apparently decrease in the order Zn>Cu>Cr>Mn=Pb>Cd and were well below WHO permissible limits that were safe for human consumption.
Adhikari
S
S
Soil and Water Chemistry Section, Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar 751 002, India. subhendu66@rediffmail.com
Ghosh
Lopa
L
Giri
B S
BS
Ayyappan
S
S
D000818:Animals; D004784:Environmental Monitoring; D005399:Fishes / Q000378:metabolism*; D020387:Food Chain; D005618:Fresh Water / Q000032:analysis*; D019015:Geologic Sediments / Q000032:analysis*; D007194:India; D008670:Metals / Q000032:analysis* / Q000378:metabolism; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism; D010933:Plankton / Q000737:chemistry*; D013054:Spectrophotometry, Atomic; D014018:Tissue Distribution; D014131:Trace Elements / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism
D008670:Metals; D019216:Metals, Heavy; D014131:Trace Elements; D014874:Water Pollutants, Chemical