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Thermal reaction norms for growth vary among cohorts of Pacific cod (Gadus macrocephalus)

机译：生长的热反应规范在太平洋鳕鱼（Gadus macrocephalus）的队列中有所不同

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摘要

While much effort has been directed at determining the spatial scales of adaptation in thermal reaction norms for growth, it is widely assumed that these reaction norms have high temporal stability. Water temperatures in the Gulf of Alaska in 2007 were the coldest on record since the mid-1970s and we present evidence that the thermal reaction norm for growth of age-0 Pacific cod {Gadus macrocephalus) in this cohort differed significantly from two adjacent cohorts. In addition to exhibiting higher growth potential at low temperatures, the 2007 cohort had a higher mean vertebral count, consistent with the widespread thermal effect known as "Jordan's Rule." Variation among cohorts in these physiological and morphological traits suggests a persistent response to environmental history (epigenetic effect). Temperature-induced pheno-typic plasticity in the reaction norm for growth has significant implications for using growth rates to evaluate habitat quality and illustrates the complex responses of fishes to climate variability.
机译：尽管已经做出很大努力来确定用于生长的热反应规范中适应性的空间尺度，但是广泛认为这些反应规范具有高的时间稳定性。 2007年阿拉斯加湾的水温是有史以来自1970年代中以来最冷的，我们提供的证据表明，该队列中0岁太平洋鳕鱼（Gadus macrocephalus）生长的热反应范数与两个相邻队列明显不同。除了在低温下表现出更高的生长潜力外，2007年研究组的平均椎骨数也更高，这与被称为“约旦法则”的广泛热效应相一致。这些生理和形态特征的队列之间的差异表明对环境历史的持续反应（表观遗传效应）。温度在生长反应规范中诱导的表型可塑性对使用生长速率评估栖息地质量具有重要意义，并说明了鱼类对气候变化的复杂反应。

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    《Marine biology》 |2012年第10期|p.2173-2183|共11页
  • 作者

    Thomas P. Hurst; Stephan B. Munch; Kate A. Lavelle;

  • 作者单位

    Resource Assessment and Conservation Engineering Division, Alaska Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2030 S. Marine Science Drive, Newport, OR 97365, USA;

    Fisheries Ecology Division, Southwest Fisheries Science Center,National Marine Fisheries Service, NOAA, 110 Shaffer Rd.,Santa Cruz, CA 95060, USA;

    Hatfield Marine Science Center, Oregon State University, Newport, OR 97365, USA Harte Research Institute 314, Unit 5869, Texas A&M University-Corpus Christi, 6300 Ocean Drive, Corpus Christi, TX 78412, USA;

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