Heavy metal concentrations in a sea urchin, Diadema setosum from Khang khao island, Chonburi province
1998
Jamrearn Buarung | Samran Tongumpon | Sarai Pairagsa | Jaruthat Milinthalek | Thamasak Yeemin (Ramkhamhaeng Univ., Bangkok (Thailand). Faculty of Science. Div. of Environmental Science)
Concentrations of Pb, Cu, Zn and Fe were measured in fecal pellets and gonads of a sea urchin, Diadema setosum, from coral communities of Khang Khao Island during March-April 1998. The samples were analyzed by Atomic Absorption Spectophotometer. Concentrations of Pb, Cu, Zn and Fe in fecal pellets were 0.0313, 0.0084, 0.0601 and 0.957 mg/g dry weight in March and 0.0339, 0.0071, 0.0286 and 1.0939 mg/g dry weight in April, respectively. Concentrations of Pb, Cu, Zn and Fe in gonads were 0.0032, 0.0057, 0.1823 and 0.3347 mg/g dry weight in March and 0.008, 0.0025, 0.1354 and 0.0976 mg/g dry weight in April, respectively. In addition, Concentrations of Pb, Cu, Zn and Fe in seawater were 0.018, 0.047, 0.194 and 0.068 ppm in March and 0.123, 0.043, 0.183 and 0.073 ppm in April, respectively. Heavy metal concentrations in the sea urchin varied with the body compartment analyzed. Fe was preferentially accumulated in fecal pellets, whereas, Zn was mainly accumulated in gonads. D. setosum is a dominant species in coral communities in the inner Gulf of Thailand and could be a bioindicator for assessing and monitoring heavy metal contamination in coral reef ecosystems.
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