Highlights
- Tralopyril and OA stimulate energy metabolism gene expression in the C. gigas.
- Under the stress of ocean acidification, C. gigas tend to develop into females.
- C. gigas are able to restore normal energy metabolism from a state of stress after depuration.
Abstract
The combined effects of the novel antifouling biocide tralopyril (TP) nitrile and ocean acidification (OA) on marine organisms are still not well understood, despite the increasing attention given to the toxic effects of emerging pollutants and OA on marine organisms in recent years. In this study, Crassostrea gigas (C. gigas) was exposed to TP, OA, and a combination of TP and OA for 21 days with a 14-day depuration. This study investigated the inter-tissue variability in energy metabolism responses and the impacts on gonadal development in C. gigas under both single and combined exposures to TP and OA. The results indicate that TP exposure and OA resulted in up-regulation of energy metabolism genes in the C. gigas, with tissues exhibiting enhanced aerobic metabolism. Furthermore, OA influences the sex determination of C. gigas, promoting the development of female individuals. Moreover, following depuration, C. gigas is able to restore normal energy metabolism and sexual development through the accumulation of suitable energy reserves. This study provides a valuable reference for the environmental and ecological risk assessment of TP, addressing the research gap in understanding the combined toxicity of TP and OA on aquatic organisms.
Li P., Yin M., Wang X., Jia R., Chen C., Liu B., Liu Y., Zeng B., Li T., Liu L., Song H.-J. & Li Z.-H., 2024. Effects of single or combined exposure to tralopyril and ocean acidification on energy metabolism response and sex development in Pacific oysters (Crassostrea gigas). Marine Pollution Bulletin 209(Part B): 117209. doi: 10.1016/j.marpolbul.2024.117209. Article.
