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Volume : III, Issue : VIII, September - 2013 Effect Of Calcium On Cadmium Induced Bioaccumulation In Selected Tissues Of Fresh Water Teleost, Oreochromis Mossambicus (tilapia) Obaiah Jamakala , G. Bhavani And A. Usha Rani Published By : Laxmi Book Publication Abstract : Cadmium (Cd) is one of the most toxic, non-essential heavy metal and constitutes a real threat to fish
because of its widespread occurrence in the aquatic environment. The present study is carried out to know the effect
of calcium (Ca) in reducing the Cd bioaccumulation levels in the selected tissues of fresh water fish, Oreochromis
mossambicus (Tilapia) exposed to Cd. The fish were exposed to cadmium chloride (CdCl ) at a sub lethal 2
concentration of 1/10th LC50/48 hrs i.e. 5ppm for 7, 15 and 30 days (d) time periods. After 15d Cd exposure, the fish
were supplemented with trace element Ca (1ppm) and observed for again 7, 15 and 30d long sojourn. After the
specified time periods, the test tissues like liver, kidney, muscle, brain and gill were isolated and tested for Cd
bioaccumulation by Atomic Absorption Spectrophotometer (AAS – Schimadzu AA6300). There was a significant
elevation in Cd concentrations in all the test tissues with increased period of exposure to the heavy metal. Maximum
Cd accumulation was found in 30d Cd exposed fish kidney (22.353±0.41 ìg / gm wet wt. of the tissue) than the other
tissues. However there was significant reduction in Cd bioaccumulation with Ca supplementation suggesting their
vital role in heavy metal detoxification. Maximum decrease in Cd accumulation was found in 30d fish kidney
(6.996 ± 0.284 ìg / gm wet wt. of the tissue) supplemented with Ca. Our findings clearly envisages that 30d Ca
supplementation is more effective in reducing the Cd body burden when compared to other time periods in the fresh
water fish, Oreochromis mossambicus Keywords : Article : Cite This Article : Obaiah Jamakala , G. Bhavani And A. Usha Rani, (2013). Effect Of Calcium On Cadmium Induced Bioaccumulation In Selected Tissues Of Fresh Water Teleost, Oreochromis Mossambicus (tilapia). Indian Streams Research Journal, Vol. III, Issue. VIII, http://oldisrj.lbp.world/UploadedData/3031.pdf References :
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