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MERCURY UPTAKE BY LYRATE ASIATIC HARD CLAM (Meretrix lyrata) AT BACH DANG’S ESTUARY, HAI PHONG, VIET NAM

Đăng lúc: Thứ bảy - 19/07/2014 09:17 - Người đăng bài viết: admin
Contact author: Dr. Lê Xuân Sinh, email: sinhlx@gmail.com
As mollusks live by filtering feeding and move limitedly, the rate of mercury uptake of hard clam in marine environment is often higher than that of other species. Recent decades, a large amount of mercury from agricultural as well as industrial sources have been noted to discharge into Bach Dang estuary. That mercury can be uptaken in hard clam (meretrix lyrata) which is a kind of species hatchery popularly grown in there. In this study, we focused on assessing mercury accumulation mechanisms of species Meretrix lyrata, based on the mercury analysis in tissues and stomach of hard clam. Our result showed that rate of methyl mercury to total mercury is 23 % at OTN station, 39 % at AD station. There was no clear evidence to state that the mercury uptaken is in the clam stomach origins from their food. However, there is a considerable relationship between mercury concentration, especially methyl mercury, observed in tissue. Our result confirmed that Meretrix lyrata can be used as indicative species for mercury pollution in marine environment.

Keywords: accumulation mechanisms, mercury, hard clam (meretrix lyrata).

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Tác giả bài viết: Dr. Lê Xuân Sinh

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Trưởng ban biên tập: TS. Lê Xuân Sinh - Email: bienxanhs.net@gmail.com - Hotline: +(84)972-366-858