Effect of Salinity on the Toxicity of Mercury in Mangrove Clam, Polymesoda erosa (Lightfoot 1786)
The present study reports the effect of salinity on the toxicity of mercury in mangrove clam Polymesoda erosa. The toxic effect was found to be influenced by different salinities and mortality increased with an increase in salinity. The 96 hour LC50 were 0.58, 0.35 and 0.26 ppm Hg in 10, 20...
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| Format: | Article |
| Language: | English |
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Asian Fisheries Society
2000-12-01
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| Series: | Asian Fisheries Science |
| Online Access: | https://www.asianfisheriessociety.org/publication/downloadfile.php?id=457&file=Y0dSbUx6QXlPVFk1Tmpjd01ERXpOVFU0TWpZd05URXVjR1Jt |
| Summary: | The present study reports the effect of salinity on the toxicity of mercury in mangrove clam Polymesoda erosa. The toxic effect was found to be influenced by different salinities and mortality increased with an increase in salinity. The 96 hour LC50 were 0.58, 0.35 and 0.26 ppm Hg in 10, 20 and 30 ppt salinity, respectively at room temperature. The LT50 values also suggested high mortality with increasing Hg concentration. Accumulation of Hg in the tissue of the clam was greater in the gills than in any other parts. The amount of Hg in the tissues was dependent on the concentration in the medium and length of exposure. This behavior of Hg was related to affinity to certain body organs and changing rate of adsorption after methylation and chemical speciation. Accumulation was maximum in higher salinity (30 ppt). |
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| ISSN: | 0116-6514 2073-3720 |