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首页> 外文期刊>Marine biology >Partial decoupling from the temperature size rule by North Sea copepods
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Partial decoupling from the temperature size rule by North Sea copepods

机译：与北海co足类的温度大小规则部分解耦

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摘要

In temperate seas, multi-voltine copepods show a pronounced seasonal variability in body size, which affects both their reproductive capacity and their accessibility to size-selective predators. Here, we studied seasonal changes of female prosome length from six common copepods, Acartia clausi, Centropages hamatus, Centropages typicus, Paracalanus parvus, Pseudocalanus elongatus, and Temora longicornis between 2000 and 2005 at the time series station Helgoland Roads, southern North Sea. We observed no significant effect of food (measured as phytoplankton carbon content) with size of adult females. Moreover, in none of the species investigated was prosome length significantly correlated with temperature when considering the whole year. Instead, all species had a period of temperature-related size, but for the size distribution during the rest of the year we distinguished two groups of species. Group 1 (Acartia clausi, Centropages hamatus, and Pseudocalanus elongatus) had a resting phase with females of the same size persisting for half a year, while in group 2 the time after the temperature-related phase was characterized by irregular size distributions. A female resting phase of Acartia clausi, Centropages hamatus, and Pseudocalanus elongatus has been hitherto unknown. Size distribution control after the temperature-related phase in group 2 is as yet not understood, but the awakening/hatching of resting eggs and/or copepodids may be found to be involved.
机译：在温带海域，多足co足类动物的体型表现出明显的季节性变化，这既影响了它们的繁殖能力，也影响了对大小选择性捕食者的可及性。在这里，我们研究了2000年至2005年在北海南部南部Helgoland Roads的时间序列站上发现的六种常见co足类动物（car螨，A螨，尖吻鲈，Typicalus，Paracalanus parvus，Pseudocalanus elongatus和Temora longicornis）的雌性体长的季节性变化。我们没有观察到食物对成年雌性大小有显着影响（以浮游植物碳含量衡量）。此外，在考虑全年时，没有一个物种的前体长度与温度显着相关。取而代之的是，所有物种都有一个与温度相关的时期，但是在一年的剩余时间内，我们区分了两组物种。第一组（（螨，ha虫和延长假单胞菌）有一个静止期，大小相同的雌性持续了半年以上，而第二组中，与温度有关的阶段后的时间以大小分布不规则为特征。迄今还不知道青虫，雌性Chamtopages hamatus和Pseudocalanus elongatus的雌性休息期。尚不了解第2组中与温度有关的阶段之后的大小分布控制，但是可能会发现涉及静息卵和/或双足纲的唤醒/孵化。

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  • 来源
    《Marine biology》 |2019年第5期|58.1-58.13|共13页
  • 作者

    Hirche Hans-Juergen; Boersma Maarten; Wiltshire Karen H.;

  • 作者单位

    Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, D-27468 Bremerhaven, Germany;

    Biol Anstalt Helgoland, D-27498 Helgoland, Germany|Univ Bremen, FB2, Bremen, Germany;

    Wattenmeerstn, Hafenstr 43, D-25992 List Auf Sylt, Germany|Univ Kiel, Kiel, Germany;

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