The population of Arctic lamprey ( Lethenteron camtschaticum ) is declining at the southern limit of its distribution in the Northern Hemisphere. Rising river water temperatures due to global warming may impact the metabolism of larval lamprey and limit their distribution. We evaluated the upper thermal tolerance of young-of-year larval Arctic lamprey using the incipient lethal temperature (ILT) and the acclimated chronic exposure (ACE) methods. According to the ILT method, the ultimate incipient lethal temperature for 7 days of culture was estimated to be 29.3 ºC (95% CI: 28.2–30.2 ºC). According to the ACE method, marked growth inhibition occurred at temperatures higher than 28 ºC.

中文翻译：

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北极七鳃鳗幼虫的耐热性上限 (Letenteron camtschaticum)

北极七鳃鳗 ( Lethenteron camtschaticum ) 的种群在北半球分布的南端正在下降。全球变暖导致河水温度上升可能会影响七鳃鳗幼虫的代谢并限制它们的分布。我们使用初始致死温度 (ILT) 和适应环境的慢性暴露 (ACE) 方法评估了北极七鳃鳗幼鱼的耐热性上限。根据 ILT 方法，7 天培养的最终初始致死温度估计为 29.3 ºC（95% CI：28.2–30.2 ºC）。根据 ACE 方法，在高于 28 ºC 的温度下发生显着的生长抑制。