Consequences of elevated CO2 exposure across multiple life stages in a coastal forage fish: Towards a Broader Perspective on Ocean Acidification Research Part 2 A special issue of the ICES Journal of Marine Science
Consequences of elevated CO2 exposure across multiple life stages in a coastal forage fish: Towards a Broader Perspective on Ocean Acidification Research Part 2 A special issue of the ICES Journal of Marine Science
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沿海饲料鱼多个生命阶段二氧化碳暴露量增加的后果：海洋酸化研究更广阔的视角第 2 部分 ICES 海洋科学杂志特刊
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
H. Baumann
中科院分区：
文献类型：
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作者：
C. Murray;L. Fuiman;H. Baumann
&NA;海洋酸化可能会影响海洋鱼类的健康，然而，报告中性至中度影响的研究大多是短期暴露于升高的二氧化碳中，而跨生命阶段的长期研究仍然很少。我们进行了一项 CO2 暴露实验，其中将大量 (n > 2200) 来自野生产卵鱼的大西洋银边龟幼体在控制 (500 µatm) 和高 CO2 条件 (2300 µatm) 下饲养 135 天，直至其胚胎、幼虫和幼体阶段。尽管不同治疗方法的存活率很高，但在长度、重量、状况因素和脂肪酸 (FA) 组成方面观察到细微但显着的差异。平均而言，经过酸化处理的鱼身长缩短了 4%，体重减轻了 6%，但与对照幼鱼相比，其状况因子更高。此外，长度和体重分布的指标存在显着差异，来自高二氧化碳处理的幼体占据更极端的尺寸类别，并且长度分布转向正峰度。 27 个 FA 中有 6 个在处理之间存在显着差异。我们的结果表明，高二氧化碳条件会改变M. menidia的长期生长，特别是在没有过量食物的情况下。这些差异是否以及如何影响野生鱼类种群面临尺寸选择性捕食和季节性变化的猎物丰度仍有待证明。
&NA; Ocean acidification may impact the fitness of marine fish, however, studies reporting neutral to moderate effects have mostly performed short‐term exposures to elevated CO2, whereas longer‐term studies across life stages are still scarce. We performed a CO2 exposure experiment, in which a large number (n > 2200) of Atlantic silverside Menidia menidia offspring from wild spawners were reared for 135 days through their embryonic, larval, and juvenile stages under control (500 &mgr;atm) and high CO2 conditions (2300 &mgr;atm). Although survival was high across treatments, subtle but significant differences in length, weight, condition factor and fatty acid (FA) composition were observed. On average, fish from the acidified treatment were 4% shorter and weighed 6% less, but expressed a higher condition factor than control juveniles. In addition, the metrics of length and weight distributions differed significantly, with juveniles from the high CO2 treatment occupying more extreme size classes and the length distribution shifting to a positive kurtosis. Six of twenty‐seven FAs differed significantly between treatments. Our results suggest that high CO2 conditions alter long‐term growth in M. menidia, particularly in the absence of excess food. It remains to be shown whether and how these differences will impact fish populations in the wild facing size‐selective predation and seasonally varying prey abundance.