Nano-TiO is inevitably released into aquatic environment with increasing of nanotechnology industries. Study pointed that different individuality showed divergent behavioral and physiological response when facing environmental stress. However, the effects of nano-TiO on tolerance of bivalves with different individualities remain unknown. In the study, clams were divided into two types of individuality - proactive and reactive by post-stress recovery method. It turned out that proactive individuals had quicker shell opening level, stronger burrowing behavior, faster feeding recovery, higher standard metabolic rate and more rapid ammonia excretion ability than reactive individuals after exposed to air. Then, the survival rate, hemocytes response and oxidase activity of classified clams were evaluated after nano-TiO exposure. Results showed that after 30 d exposure, proactive individuals accelerated burrowing behavior with higher survival rate. Moreover, proactive clams had better adaptability and less hemocytes response and oxidative damage than reactive clams. The study highlights the individualities of marine shell fish determine individual capacity to adapt to environmental changes, play important roles in aquaculture and coastal ecosystem health.

中文翻译：

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纳米二氧化钛对不同个体文蛤的不同毒性作用


随着纳米技术产业的发展，纳米TiO不可避免地被释放到水环境中。研究指出，不同的个体在面对环境压力时表现出不同的行为和生理反应。然而，纳米TiO对不同个体双壳类动物耐受性的影响仍不清楚。研究中，通过应激后恢复方法将蛤类分为主动型和反应型两种个体。结果表明，暴露于空气后，主动个体比反应个体具有更快的开壳水平、更强的挖洞行为、更快的摄食恢复、更高的标准代谢率和更快的氨排泄能力。然后，评估分类蛤在纳米二氧化钛暴露后的存活率、血细胞反应和氧化酶活性。结果表明，暴露30 d后，主动个体会加速挖洞行为，存活率较高。此外，主动型蛤比反应型蛤具有更好的适应性、更少的血细胞反应和氧化损伤。研究强调，海洋贝类的个性决定了个体适应环境变化的能力，在水产养殖和沿海生态系统健康中发挥着重要作用。