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首页> 外文期刊>Marine biology >Expanding evaluation of ocean acidification responses in a marine gadid: elevated CO_2 impacts development, but not size of larval walleye pollock
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Expanding evaluation of ocean acidification responses in a marine gadid: elevated CO_2 impacts development, but not size of larval walleye pollock

机译：扩大海洋酸化反应的评估：升高的CO_2影响发展，但幼虫Walleye Pollock的规模不是

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摘要

Responses of marine populations to climate conditions reflect the integration of a suite of complex and interrelated physiological and behavioral responses at the individual level. Many of these responses are not immediately reflected in changes to survival, but may impact growth or survival at later life stages. Understanding the broad range of impacts of rising CO2 concentrations on marine fishes is critical to predicting the consequences of ongoing ocean acidification. Walleye pollock (Gadus chalcogrammus) support the largest single-species fishery in the world and provide a critical forage base throughout north Pacific ecosystems. Previous studies of high CO2 effects on early life stages of walleye pollock have suggested a general resiliency in this species, but those studies focused primarily on growth and survival rates. Here, we expand on earlier studies with an independent experiment focused on walleye pollock larval development, swimming behavior, and lipid composition from fertilization to 4 weeks post-hatch at ambient (similar to 425 mu atm) and elevated (similar to 1230 mu atm) CO2 levels. Consistent with previous observations, size metrics of walleye pollock were generally insensitive to CO2 treatment. However, 4-week post-hatch larvae had significantly reduced rates of swim bladder inflation. A modest change in the swimming behavior of post-feeding larvae was observed at four, but not at 2 weeks post-hatch. Although there were no differences in overall lipid levels between CO2 treatments, the ratio of energy storage lipids (triacylglycerols) to structural membrane lipids (sterols) was lower among larvae reared at high CO2 levels. Although we observed higher survival to 4 weeks post-hatch among fish reared at high CO2 levels, the observations of reduced swim bladder inflation rates and changes in lipid cycling suggest the presence of sub-lethal effects of acidification that may carry over and manifest in later life stages. These observations support the continued need to evaluate the impacts of ocean acidification on marine fishes across a wide range of traits and life stages with replicated, independent experiments.
机译：海洋群体对气候条件的响应反映了在个人层面的套件套装套件的整合。许多这些反应不会立即反映在生存期的变化中，但可能会影响后期生命阶段的生长或生存。了解海洋鱼类上升的CO2浓度的广泛影响对于预测持续的海洋酸化的后果至关重要。 Walleye Pollock（Gadus Chalcogrammus）支持世界上最大的单一物种渔业，并在北太平洋生态系统中提供关键的牧草基地。以前对Walleye Pollock的早期生命阶段的高二氧化碳效应提出了这一物种的一般性弹性，但这些研究主要集中在生长和生存率上。在这里，我们在早期的研究中扩展了一个独立的实验，专注于Walleye Pollock幼虫发育，游泳行为和脂质组合物，从受精到4周，在环境温度（类似于425亩ATM）和升高（类似于1230亩ATM）二氧化碳水平。与先前的观察结果一致，Walleye Pollock的大小度量通常对CO2处理不敏感。然而，4周的孵化后幼虫在游泳膀胱通胀率显着降低。在四个后观察到喂养后幼虫的游泳行为的温度变化，但在舱口后2周。虽然CO 2治疗之间的整体脂质水平没有差异，但在高二氧化碳水平下幼虫中储能脂质（三酰基甘油）与结构膜脂质（甾醇）的比例较低。虽然我们观察到在高二氧化碳水平的鱼类后舱口后4周的生存率较高，但减少游泳膀胱通胀率的观察和脂循环的变化表明酸化的亚麻致死的存在，以便在后面携带和清单生活阶段。这些观察支持持续需要评估海洋酸化对海洋鱼类的影响，跨各种特征和生命阶段进行复制，独立的实验。

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  • 来源
    《Marine biology》 |2021年第8期|119.1-119.17|共17页
  • 作者

    Hurst Thomas P.; Copeman Louise A.; Andrade Jessica F.; Stowell Michelle A.; Al-Samarrie Colleen E.; Sanders Justin L.; Kent Michael L.;

  • 作者单位

    NOAA Alaska Fisheries Sci Ctr Natl Marine Fisheries Serv Hatfield Marine Sci Ctr Newport OR 97365 USA;

    NOAA Alaska Fisheries Sci Ctr Natl Marine Fisheries Serv Hatfield Marine Sci Ctr Newport OR 97365 USA|Oregon State Univ Hatfield Marine Sci Ctr Coll Earth Ocean & Atmospher Sci Newport OR USA|Oregon State Univ Hatfield Marine Sci Ctr Cooperat Inst Marine Resources Studies Newport OR USA;

    Oregon State Univ Hatfield Marine Sci Ctr Cooperat Inst Marine Resources Studies Newport OR USA|Lynker Technol LLC Hatfield Marine Sci Ctr Newport OR USA;

    Oregon State Univ Hatfield Marine Sci Ctr Cooperat Inst Marine Resources Studies Newport OR USA|Lynker Technol LLC Hatfield Marine Sci Ctr Newport OR USA;

    Oregon State Univ Dept Microbiol Corvallis OR 97331 USA;

    Oregon State Univ Dept Microbiol Corvallis OR 97331 USA;

    Oregon State Univ Dept Microbiol Corvallis OR 97331 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Behavior; Fatty acids; Growth rate; Lipids; Ocean acidification; Swim bladder;

    机译：行为;脂肪酸;生长速率;脂质;海洋酸化;游泳膀胱;

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