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首页> 外文期刊>Marine biology >Within- and transgenerational effects of ocean acidification on life history of marine three-spined stickleback (Gasterosteus aculeatus)
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Within- and transgenerational effects of ocean acidification on life history of marine three-spined stickleback (Gasterosteus aculeatus)

机译：海洋酸化的代内和代际影响对海洋三棘stick的生活史的影响（Gasterosteus aculeatus）

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摘要

Some studies have demonstrated that elevated CO_2 concentrations in ocean waters negatively impact metabolism and development of marine fish. Particularly, early developmental stages are probably more susceptible to ocean acidification due to insufficient regulations of their acid-base balance. Transgenerational acclimation can be an important mechanism to mediate impacts of increased CO_2 on marine species, yet very little is known about the potential of parental effects in teleosts. Therefore, transgenerational effects were investigated on life history in juvenile three-spined sticklebacks Gasterosteus aculeatus by acclimating parents (collected in April 2012, 55°03'N, 8°44'E) and offspring to ambient (～400 μatm) and elevated (～1,000 μatm) CO_2 levels and measured parental fecundity as well as offspring survival, growth and otolith characteristics. Exposure to elevated CO_2 concentrations led to an increase in clutch size in adults as well as increased juvenile survival and growth rates between 60 and 90 days post-hatch and enlarged otolith areas compared with fish from ambient CO_2 concentrations. Moreover, transgenerational effects were observed in reduced survival and body size 30 days post-hatch as well as in enlarged otoliths at the end of the experiment, when fathers or both parents were acclimated to the high-CO_2 environment. These results may suggest that elevated CO_2 concentrations had rather positive effects on life-history traits of three-spined sticklebacks, but that parental acclimation can modify these effects without improving offspring fitness. Although the mechanistic basis of such transgenerational acclimation remains unclear, selective gradients within generations seem to determine the direction of transgenerational effects.
机译：一些研究表明，海水中CO_2浓度升高会对海水鱼类的代谢和发育产生负面影响。特别是，由于对酸碱平衡的调节不充分，早期的开发阶段可能更容易受到海洋酸化的影响。跨代适应可能是介导增加的CO_2对海洋物种影响的重要机制，但对硬骨鱼类父母效应的潜力知之甚少。因此，通过适应父母（2012年4月采集，北纬55°03'，东经8°44'）和后代适应环境（〜400μatm）并提高其后代的适应性，研究了幼年三棘棘背式Gasterosteus aculeatus的生活史。 〜1,000μatm）CO_2水平，并测量父母的繁殖力以及后代的存活，生长和耳石特征。与环境CO_2浓度较高的鱼类相比，暴露于较高浓度的CO_2会导致成年鱼的离体尺寸增加，以及孵化后60至90天之间幼鱼的存活率和生长率以及耳石面积的增加。此外，当父亲或父母双方都适应了高CO_2环境时，在孵化30天后存活率降低和体型缩小以及耳石增大等方面都观察到了跨代效应。这些结果可能表明，升高的CO_2浓度对三棘stick的生活史特征具有相当积极的影响，但是父母的适应可以在不提高后代适应性的情况下改变这些影响。尽管尚不清楚这种跨代适应的机制基础，但几代内的选择性梯度似乎决定了跨代效应的方向。

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  • 来源
    《Marine biology》 |2014年第7期|1667-1676|共10页
  • 作者

    Franziska M. Schade; Catriona Clemmesen; K. Mathias Wegner;

  • 作者单位

    Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Hafenstrasse 43, 25992 List, Sylt, Germany;

    GEOMAR Helmholtz Centre for Ocean Research Kiel, Duesternbrooker Weg 20, 24105 Kiel, Germany;

    Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Hafenstrasse 43, 25992 List, Sylt, Germany;

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