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Kim BM, Saravanan M, Lee DH, Kang JH, Kim M, Jung JH, Rhee JS. Exposure to sublethal concentrations of tributyltin reduced survival, growth, and 20-hydroxyecdysone levels in a marine mysid. MARINE ENVIRONMENTAL RESEARCH 2018; 140:96-103. [PMID: 29895506 DOI: 10.1016/j.marenvres.2018.06.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 06/04/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
Tributyltin (TBT) is as an antifouling organotin compound used in boat paints. Although organotin-based antifouling agents have been banned on a global scale, the mode of action of TBT has been studied in numerous aquatic species because of its toxicity, persistence, bioaccumulation potential, and endocrine-disrupting characteristics. In this study, we conducted 96-h acute toxicity tests wherein we exposed juvenile and adult marine mysids to waterborne TBT. Over 4 weeks of exposure, mortality was dose-dependently increased in juveniles and adult mysids. To test sublethal effects of TBT on juvenile development, newborn juvenile mysids were exposed to 1, 5, or 10 ng L-1 TBT for 4 weeks. Subsequently, we measured morphological growth parameters and quantified the hormone ecdysterone (20-hydroxyecdysone: 20E), which controls molting in mysids. The lengths of the whole body, antennal scale, exopod, endopod, and telson were significantly smaller in the 5 and/or 10 ng L-1 TBT-exposed juvenile mysids than in control and DMSO-exposed groups. Levels of 20E were significantly lower at 5 and 10 ng L-1 TBT exposures. Additionally, the number of newly hatched juveniles was significantly lower from females previously exposed to 10 ng L-1 TBT. Our results indicate sublethal concentrations of TBT have inhibitory effects on the survival, growth, and production of juveniles. The lower 20E levels could be strongly associated with TBT-triggered inhibition.
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Affiliation(s)
- Bo-Mi Kim
- Unit of Polar Genomics, Korea Polar Research Institute, Incheon 21990, South Korea
| | - Manoharan Saravanan
- Department of Marine Science, College of Natural Sciences, Incheon National University, Incheon 22012, South Korea; Research Institute of Basic Sciences, Incheon National University, Incheon 22012, South Korea
| | - Do-Hee Lee
- Department of Marine Science, College of Natural Sciences, Incheon National University, Incheon 22012, South Korea
| | - Jung-Hoon Kang
- Oil and POPs Research Group, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, South Korea; Department of Marine Environmental Science, Korea University of Science and Technology, Daejeon 34113, South Korea
| | - Moonkoo Kim
- Oil and POPs Research Group, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, South Korea; Department of Marine Environmental Science, Korea University of Science and Technology, Daejeon 34113, South Korea
| | - Jee-Hyun Jung
- Oil and POPs Research Group, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, South Korea; Department of Marine Environmental Science, Korea University of Science and Technology, Daejeon 34113, South Korea.
| | - Jae-Sung Rhee
- Department of Marine Science, College of Natural Sciences, Incheon National University, Incheon 22012, South Korea; Research Institute of Basic Sciences, Incheon National University, Incheon 22012, South Korea; Institute of Green Environmental Research Center, 169, Gaetbeol-ro, Yeonsugu, Incheon 21999, South Korea.
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