Southern Seas Ecology Laboratories, School of Biological Sciences and The Environment Institute, DX 650 418, The University of Adelaide, Adelaide, SA 5005, Australia.
Aix Marseille Université/Mediterranean Institute of Oceanography (MIO) UM 110 13288, Marseille, France.
Mar Pollut Bull. 2018 Aug;133:562-567. doi: 10.1016/j.marpolbul.2018.06.004. Epub 2018 Jun 19.
Long-term species responses to ocean acidification depend on their sensitivity during different life stages. We tested for sensitivity of juvenile fish behaviour to ocean acidification by exposing eggs to control and elevated CO levels, and translocating offspring between treatments in a reciprocal design. After 12 weeks of exposure, activity, inactivity and anxiety levels of juveniles from control eggs were similar, whether juveniles had experienced elevated CO conditions or not, and this pattern was consistent over time. However, juveniles raised as eggs under elevated CO showed increased anxiety levels compared to those from control eggs. This response was not reversed when CO-exposed juveniles were translocated to control conditions. Our findings highlight the value of evaluating fish sensitivities to global change pollutants across different life stages, and indicate that sensitivity during the often-overlooked egg stage can be critical with long-lasting impairment of behaviours that are coupled to individual fitness and population persistence.
长期以来，物种对海洋酸化的反应取决于它们在不同生命阶段的敏感性。我们通过将卵暴露于对照和升高的 CO 水平来测试幼鱼行为对海洋酸化的敏感性，并在相互设计中在处理之间转移后代。经过 12 周的暴露，来自对照卵的幼鱼的活动、不活动和焦虑水平相似，无论幼鱼是否经历过升高的 CO 条件，而且这种模式随着时间的推移是一致的。然而，在升高的 CO 下作为卵饲养的幼鱼表现出比对照卵更高的焦虑水平。当将暴露于 CO 的幼鱼转移到对照条件下时，这种反应并没有逆转。我们的研究结果强调了在不同生命阶段评估鱼类对全球变化污染物敏感性的价值，并表明在经常被忽视的卵期的敏感性可能是至关重要的，因为它会对与个体适应性和种群生存能力相关的行为造成长期的损害。
