Department of Health Risk Management, China Medical University, No 91, Hsueh Shih Road, Taichung City 40402, Taiwan.
Ecotoxicol Environ Saf. 2013 Mar;89:222-30. doi: 10.1016/j.ecoenv.2012.12.002. Epub 2013 Jan 3.
There were many studies that reported the concentrations of trace elements in fish and assessed the human health risk through consumption of contaminated fish. However, fish species with different feeding habits may accumulate toxic elements differentially in their muscle. In this study, we conducted a field survey to analyze concentrations of ten trace elements in water, sediment, artificial feed, and different part of muscles either with or without skin of two species of fish, tilapia and milkfish. The results of this study showed that the ventral and dorsal muscles with skin contained higher concentrations of metals than those without skin for both species of fish. Tilapia lives in the bottom layer, the ventral part therefore contacts closely with sediment. A higher metal concentration in ventral muscle was obtained in this study when compared to dorsal muscle for tilapia. The estimated Metal Pollution Index (MPI) of tilapia is higher than that of milkfish. Our results indicated that metal concentrations in muscle of tilapia are mainly originated from sediment. However, sources of metal concentrations in muscle of milkfish can be from sediment and artificial feed.
有许多研究报告了鱼类中的微量元素浓度，并通过食用受污染的鱼类评估了人类健康风险。然而，具有不同食性的鱼类可能会在肌肉中不同地积累有毒元素。在这项研究中，我们进行了实地调查，以分析两种鱼类（罗非鱼和虱目鱼）的水、沉积物、人工饲料以及带皮和去皮的肌肉不同部位中十种微量元素的浓度。研究结果表明，两种鱼类的带皮腹部和背部肌肉中的金属浓度均高于不带皮的肌肉。罗非鱼生活在底层，因此腹部与沉积物密切接触。与罗非鱼的背部肌肉相比，本研究中罗非鱼的腹部肌肉中获得了更高的金属浓度。罗非鱼的金属污染指数（MPI）高于虱目鱼。我们的结果表明，罗非鱼肌肉中的金属浓度主要来源于沉积物。然而，虱目鱼肌肉中的金属浓度的来源可能来自沉积物和人工饲料。
