AI Article Synopsis
- The study investigated how different concentrations of the pesticide azamethiphos impact the physiology of the Chilean oyster (Ostrea chilensis) at varying temperatures (12 and 15 °C).
- Oysters exposed to a concentration of 15 μg/L of azamethiphos showed better clearance rates (CR) at 15 °C compared to those at 12 °C, indicating that warmer temperatures improve oyster performance under pesticide exposure.
- Despite high survival rates of 91% and 79% at lower and higher azamethiphos concentrations respectively, the research highlights that the combination of temperature and pesticide negatively affects oyster health and should be studied further for its impact on other marine species.
Article Abstract
The pesticide azamethiphos used by the salmon industry to treat sea lice, is applied as a bath and subsequently discharged into the sea. The effects of azamethiphos concentration (0, 15 and 100 μg L) on the physiology of the Chilean oyster (Ostrea chilensis) at two temperatures (12 and 15 °C) was examined. In all azamethiphos treatments, oysters kept at 15 °C had clearance rates (CR) higher than oysters kept at 12 °C. The oxygen consumption rate (OCR) increased at higher temperatures, except with 100 μg L of azamethiphos, where no changes were observed. Sixty days after the exposure, survival rates of 91 and 79% (15 and 100 μg L, respectively), were observed compared to the controls, a situation independent of the experimental temperature. The interaction between temperature and pesticide has detrimental effects on the physiological performance and survival of O. chilensis, and these effects should also be assessed for other non-target species.
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| http://dx.doi.org/10.1016/j.marenvres.2022.105837 | DOI Listing |
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