Bioaccumulation of persistent organic pollutants in tissues of stranded sea turtles in Taiwan coast

• Main Authors: Ke-Li Lu, 盧可立
• Other Authors: Fung-Chi Ko
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/mc954t

碩士 === 國立東華大學 === 海洋生物研究所 === 106 === In this study, we collected 2 olive stranded sea turtles and 6 green stranded sea turtles samples from 2016 to 2017. We analyzed three kinds of POPs including polychlorinated biphenyls (PCBs), Dichlorodiphenyltrichloroethane (DDTs) and Polybrominated diphenyl ethers (PBDEs) in adipose, liver, kidney and muscle of the stranded sea turtles. The objectives of this study are (1) analyzing the POPs concentrations and patterns in different tissues, (2) finding the relation between POP concentrations and the ages of sea turtles, (3) analyzing dioxin like PCBs (DL-PCBs) and calculating their toxicity equivalency quantity (TEQ), we also compare the differences between two species and what happen after the stranded turtles was rescued for 1 to 5 months. As POPs concentration, rescued green sea turtles accumulate highest POPs in adipose due to POPs are hydrophobic, however, in adopted olive sea turtles, only PCBs are highest in adipose, PBDEs and DDTs are highest in the liver due to pollutant redistribution. The sea turtles dead in field accumulate highs POPs in different tissues. After the green sea turtles are adopted, they accumulate more POPs due to frequency food exposure which help sea turtles recover energy. As POPs patterns, there is no difference between two species, and 4Cl-PCBs, 6Cl-PCBs, BDE-99, DDE are the dominant compounds in all stranded sea turtles. Lipid content of tissues play an important role on POPs pattern. Compare to others studies, POP concentrations of stranded sea turtles in Taiwan are higher than Japan, Australia and lower than America, Mexico and Spanish. The ratio of DDT/ΣDDTs in tissues are all lower than 0.4 which means Taiwan don’t release DDT anymore. In green sea turtle, the POPs concentration have the negative correlation with sea turtles’ curve carapace length (CCL) which means the older the green sea turtles are, the less POPs they accumulate. In olive sea turtles, the older one have higher POPs concentration than the younger one. To our surprise, the values of TEQ of DL-PCBs in green sea turtles are higher than olive sea turtles, so green sea turtles have more risk even the total PCBs is lower in green sea turtles. The stranded sea turtles accumulate more DL-PCB after they are adopted, however, rather this will impact the rescue of sea turtle needs more studies. The dominant DL-PCBs are PCB-105 and PCB-118 in all stranded sea turtles.