Crassostrea nippona is a valuable species for aquaculture with considerable potential for commercial oyster farming.However,it is vulnerable to changes in salinity levels in coastal environments.In this study,we inves...Crassostrea nippona is a valuable species for aquaculture with considerable potential for commercial oyster farming.However,it is vulnerable to changes in salinity levels in coastal environments.In this study,we investigated the impacts of low salinity stress on the physiological responses of C.nippona.The hemolymph osmolality could not reach equilibrium with the surrounding environmental osmolality that was below salinity 15 within 1 week.Cell expansion,cellular valuocation,decrease of gill cilia,increased apoptotic cells under salinity 10 were observed through microscopic techniques.The activities of immunity-related enzymes,including alkaline phosphatase(AKP),acid phosphatase(ACP),superoxide dismutase(SOD),and catalase(CAT),were significantly increased at salinity 10 compared with the control group.These findings highlight the vulnerability of C.nippona to low salinity stress and provide insights into the physiological changes in response to fluctuating salinity levels.Understanding these physiological responses is crucial for effective aquaculture management and developing strategies to mitigate the negative impacts of low salinity stress on C.nippona populations in coastal areas.展开更多
基金supported by the National Key R&D Program of China(No.2022YFD2400305)the Earmarked Fund for Agriculture Seed Improvement Project of Shandong Province(Nos.2021ZLGX03,2022LZGCQY010 and 2021LZGC027)the China Agriculture Research System Project(No.CARS-49)。
文摘Crassostrea nippona is a valuable species for aquaculture with considerable potential for commercial oyster farming.However,it is vulnerable to changes in salinity levels in coastal environments.In this study,we investigated the impacts of low salinity stress on the physiological responses of C.nippona.The hemolymph osmolality could not reach equilibrium with the surrounding environmental osmolality that was below salinity 15 within 1 week.Cell expansion,cellular valuocation,decrease of gill cilia,increased apoptotic cells under salinity 10 were observed through microscopic techniques.The activities of immunity-related enzymes,including alkaline phosphatase(AKP),acid phosphatase(ACP),superoxide dismutase(SOD),and catalase(CAT),were significantly increased at salinity 10 compared with the control group.These findings highlight the vulnerability of C.nippona to low salinity stress and provide insights into the physiological changes in response to fluctuating salinity levels.Understanding these physiological responses is crucial for effective aquaculture management and developing strategies to mitigate the negative impacts of low salinity stress on C.nippona populations in coastal areas.
