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Research Article

ScienceAsia 2 (1976): 117-126 |doi: 10.2306/scienceasia1513-1874.1976.02.117

 

TOTAL MERCURY IN THE FOOD CHAIN OF BANG PRA COASTAL AREA, CHON BURI

 

PIAMSAK MENASVETA

Summary: The biological magnification of total mercury residues was found in Bang Pra coastal area, Chon Buri. Fish in the higher trophic level bore higher mercury concentrations than those in the lower trophic level. It was also found that the aged predator and scavenger such as barracuda (Sphyraena obtusata) and stringray (Dasyatis zugei) exhibited positive linear relationship between total mercury residue concentration and their size. The comparison between the total mercury residue data obtained in this investigation and the data reported in other areas of the world revealed that the total mercury in this area was in normal range. Therefore, it can be concluded that the biological magnification in the Bang Pra coastal area occurs naturally.

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Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand

Received 13 August 1976