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Linking rates of metabolism and growth in marine fish larvae

机译：海水鱼类幼虫的新陈代谢与生长速度的联系

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摘要

The intricate relationship between metabolism and growth is still largely unexplored in early life stages of fish. In the present study, two experiments were conducted to explore how standard metabolic rate (SMR) of Atlantic herring (Clupea harengus) larvae was related to differences in body size, growth rate and feeding environment. In two of the three trials of the first experiment, larval SMR decreased (up to 37%) after larvae experienced 3 days of sub-optimal feeding conditions. Inter-individual differences in SMR and nutritional condition (RNA-DNA ratio) were unrelated. In a second experiment, inter-individual differences in SMR were not explained by differences in short-term (otolith marginal increment width) or long-term (size-at-age, otolith diameter-at-age) growth indicators in well (ad libitum) fed larvae. Nevertheless, a negative relationship between SMR and otolith core diameter (formed between hatching and first feeding) was observed. In well-fed larvae, the relationship between SMR, temperature (T, 5-15 degrees C) and dry mass (DM, 60-3000 mu m, 10-24 mm body length) was equal to: SMR = 0.0528 (+/- 0.0047) * DM (0.8859) (+/- 0.0127) * e(T*0.1046) (+/- 0.0034) [mean (+/- SE), adj R-2 = 0.9302, n = 384]. This is the first study to report the effects of DM on SMR in Atlantic herring larvae over a wide range of T. The present results suggest that metabolic flexibility can exist, particularly when larvae experience contrasting feeding environments, which needs to be taken into account when evaluating factors affecting larval growth and survival in the sea.
机译：在鱼类的早期生命阶段，新陈代谢与生长之间的复杂关系仍未得到充分探索。在本研究中，进行了两个实验以探索大西洋鲱鱼（Clupea harengus）幼虫的标准代谢率（SMR）如何与体型，生长率和摄食环境的差异相关。在第一个实验的三个试验中的两个试验中，在幼虫经历了3天的非最佳喂养条件后，幼虫SMR下降（最高37％）。 SMR和营养状况（RNA-DNA比率）之间的个体差异无关。在第二个实验中，SMR的个体间差异无法通过井（ad）的短期（耳石边缘增量宽度）或长期（年龄，耳石直径）生长指标的差异来解释。取食幼虫。然而，观察到SMR和耳石芯直径（在孵化和第一次进料之间形成）之间呈负相关。在饱食的幼虫中，SMR，温度（T，5-15摄氏度）和干重（DM，60-3000μm，体长10-24 mm）之间的关系等于：SMR = 0.0528（+ / -0.0047）* DM（0.8859）（+/- 0.0127）* e（T * 0.1046）（+/- 0.0034）[平均值（+/- SE），调整R-2 = 0.9302，n = 384]。这是第一项报道DM对大西洋鲱鱼幼体在宽泛T范围内SMR影响的研究。目前的结果表明，代谢灵活性可能存在，尤其是当幼体经历相反的摄食环境时，需要考虑到这一点。评估影响幼体生长和在海上生存的因素。

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  • 来源
    《Marine biology》 |2018年第1期|5.1-5.14|共14页
  • 作者

    Moyano Marta; Illing Bjoern; Christiansen Lars; Peck Myron A.;

  • 作者单位

    Univ Hamburg, Inst Hydrobiol & Fisheries Sci, Olbersweg 24, D-22767 Hamburg, Germany;

    Univ Hamburg, Inst Hydrobiol & Fisheries Sci, Olbersweg 24, D-22767 Hamburg, Germany;

    Univ Hamburg, Inst Hydrobiol & Fisheries Sci, Olbersweg 24, D-22767 Hamburg, Germany;

    Univ Hamburg, Inst Hydrobiol & Fisheries Sci, Olbersweg 24, D-22767 Hamburg, Germany;

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