Combined effects of ocean acidification and temperature on larval and juvenile growth, development and swimming performance of European sea bass (Dicentrarchus labrax)
Combined effects of ocean acidification and temperature on larval and juvenile growth, development and swimming performance of European sea bass (Dicentrarchus labrax)
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DOI：
10.1371/journal.pone.0221283
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发表时间：
2019-09-06
期刊：
影响因子：
3.7
通讯作者：
Peck, Myron A.
中科院分区：
文献类型：
--
作者：
Cominassi, Louise;Moyano, Marta;Peck, Myron A.
海洋酸化和海洋变暖（OAW）正在同时发生，可能对海洋生物构成生态挑战，特别是鱼类的早期生命阶段，尽管它们是内部钙化者，但可能没有发达的酸碱调节。本研究评估了预测OAW的关键健身性状（生长，发育和游泳能力）在欧洲鲈鱼（Dicentrarchus labrax）幼虫和少年的影响。从孵化后2天（dph）开始，将幼虫暴露于三种水平的PCO 2（650，1150，1700 μ atm; pH 8.0，7.8，7.6）中的一种，温度为冷（15 ℃）或暖（20 ℃）。生长速率，发育阶段和临界游泳速度（U-crit）反复测量，从0.6到类似于10.0（冷）或类似于14.0（暖）厘米的体长。暴露于不同浓度的PCO 2对仔稚鱼的生长发育和U-比容无显著影响。在较温暖的温度下，幼虫表现出更快的生长和更深的身体。脊索屈曲发生在0.8和1.2厘米和变态完成的年龄相似的45和相似的60天后孵化的海鲈鱼在温暖和寒冷的治疗，分别。游泳性能迅速增加，幼虫的发展，但更好的游泳者观察到在冷处理，反映了一个潜在的快速增长和游泳能力之间的权衡。对这项研究和其他海洋鱼类研究结果的比较表明，OAW对早期生命阶段的生长，发育和游泳能力的影响是特定物种的，概括气候驱动的变暖或海洋酸化的影响是不必要的。
Ocean acidification and ocean warming (OAW) are simultaneously occurring and could pose ecological challenges to marine life, particularly early life stages of fish that, although they are internal calcifiers, may have poorly developed acid-base regulation. This study assessed the effect of projected OAW on key fitness traits (growth, development and swimming ability) in European sea bass (Dicentrarchus labrax) larvae and juveniles. Starting at 2 days post-hatch (dph), larvae were exposed to one of three levels of PCO2 (650, 1150, 1700 mu atm; pH 8.0, 7.8, 7.6) at either a cold (15 degrees C) or warm (20 degrees C) temperature. Growth rate, development stage and critical swimming speed (U-crit) were repeatedly measured as sea bass grew from 0.6 to similar to 10.0 (cold) or similar to 14.0 (warm) cm body length. Exposure to different levels of PCO2 had no significant effect on growth, development or U-crit of larvae and juveniles. At the warmer temperature, larvae displayed faster growth and deeper bodies. Notochord flexion occurred at 0.8 and 1.2 cm and metamorphosis was completed at an age of similar to 45 and similar to 60 days post-hatch for sea bass in the warm and cold treatments, respectively. Swimming performance increased rapidly with larval development but better swimmers were observed in the cold treatment, reflecting a potential trade-off between fast grow and swimming ability. A comparison of the results of this and other studies on marine fish indicates that the effects of OAW on the growth, development and swimming ability of early life stages are species-specific and that generalizing the impacts of climate-driven warming or ocean acidification is not warranted.