1. Estuarine sediment toxicity testing with an indigenous subtropical amphipod.
- Author
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Wu, Meng-Chun, Dahms, Hans-Uwe, Liu, Chun-Hung, Hsieh, Chi-Ying, Wang, Chen-Ci, and Ho, Zong-Yo
- Subjects
CHRONIC toxicity testing ,ESTUARINE sediments ,TOXICITY testing ,SODIUM dodecyl sulfate ,TRACE metals ,CONTAMINATED sediments - Abstract
This study reports on a sediment toxicity test developed with a native amphipod strain of Ptilohyale barbicornis where sediments from 10 estuarine stations along the western coastline of Taiwan were evaluated with respect to trace metals and PAHs. The test was validated by determining dose–response relationships for aqueous copper, and cadmium and sodium dodecyl sulfate as well as copper-spiked sediment, showing a sensitivity of P. barbicornis indicating its capability serving as a toxicity test species. A significant negative correlation between growth effects after 28 days of exposure to field-collected contaminated sediments and PAHs concentrations was observed. Similarly, the chronic toxicity test showed that growth was mostly inhibited compared to controls, body lengths in particular being significantly different from controls (p < 0.05). Various estuarine sediment pollutants in the quality guidelines can be further evaluated using P. barbicornis to understand their comprehensive biological effects and ecological risks. • The sensitivity of the native amphipod P. barbicornis to estuarine sediments spiked with pollutants showed its suitability as a model species. • Growth measured as body length provided a more suitable endpoint than body weight in a chronic assay with P. barbicornis. • PAHs and metals of estuarine stations showed no correlation with the survival rate of P. barbicornis. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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