Effect of Tributyltin Chloride on Digestive Gland of A Freshwater Bivalve,Lamellidens Marginalis In Monsoon Season

Abstract Freshwater bivalve are economically important and an alternative source of significant human dietary constituents. In the present study experimental bivalve, Lamellidens marginalis exposed to tributyltin chloride at 4.6 ppm, 3.4 ppm, 2.6 ppm and 1.8 ppm for 24, 48, 72 and 96 hours respectively. After exposure the basement membrane was ruptured and tubules lost their connection with connective tissue. Severity of damage was found to be more in 96hours. In the present study, it is revealed that the initial impact of the antifouling organometallic compounds exposed for 24hours is less when compared with other exposure periods. The 48 hours exposure to TBT shows that damage caused is at a higher rate to the tissue structure as it metabolizes into the tissues. After 72 hours exposure the damage is still there and not so high which might be due to the adaptation of the tissues to the pollutant and development of resistance to some extent. At 96 hours exposure the damage was increased which may be due to the lost of resistance of power of the tissues. This may be either due to the defense mechanism of cell becoming weak, or due to the high accumulation of the pollutant. From this study we concluded that toxicity of TBTCL was responsible for histological changes in freshwater bivalve, Lamellidens marginalis.