碩士 / 國立高雄師範大學 / 生物科學研究所 / 94 / Numerous studies have shown that high levels of mercury are harmful to both humans and wildlife. The concentration of mercury has been determined in four species of marlins for a survey of the bioaccumulatable contaminant.
Samples were prepared using standard digestion procedures and analyzed by flameless atomic absorption. Seventy samples were collected from Southern China Sea. Among the four species analyzed, three species illustrated concentration level of total mercury higher than the recommended food safety criteria by World Health Organization.
Concentrations of total and organic mercury were correlation in liver and muscle of marlins. It was observed that concentration level of mercury was related to fish length. Among the muscle tissue, organic mercury ranged from 77.67 to 88.78% of total mercury content in marlins. It was believed that demethylation of organic mercury in liver resulting lower organic mercury - total mercury ratio (i.e., 33.77% to 53.28% ).
Comparison of muscle mercury content was made for marlins, tunas, and salmons. Species with higher trophic level will have higer tendency of mercury accumulation. Also concentration level of organic and total mercury were correlated to length of fish. Based upon the mercury concentration in marlins, daily consumption of marlins was estimated for the health concerns.
| Identifer | oai:union.ndltd.org:TW/094NKNU0112008 |
| Date | January 2006 |
| Creators | Yao-Lin Chang, 張曜麟 |
| Contributors | Colin S. Chen, 陳士賢 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 87 |
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