Asian swamp eel, Monopterus albus/javanensis [Zuiew, 1973/Lacepede 1800], has been established in the southeastern USA since at least 1994, yet little is known about its ability to survive low winter temperatures. We use standard thermal methodologies to quantify low temperature responses and provide a detailed description of swamp eel reactions to cold temperatures. When exposed to chronic temperature decreases of 1.0 °C day⁻¹, swamp eel ceased foraging at 15.0 °C, markedly diminished movements below 11.0 °C, and became incapacitated near 9.6 °C. During critical thermal minima trials, swamp eel exposed to acute temperature drops (0.25 °C min⁻¹) tolerated temperatures as low as 6.2 °C. Swamp eel exhibited a moderate cold acclimation response, gaining 0.23 °C in cold tolerance for every 1 °C drop in acclimation temperature. Progressive time-series critical thermal minimum temperatures (CTmin) estimates for eel acclimated to 20.5 °C followed by an acute temperature decrease to 16.0 °C, revealed that cold acclimation may occur in only 8 days. Fringe populations of swamp eel in their native range periodically experience colder winter temperatures, which may explain the ability of introduced populations to survive winter cold fronts in Florida. Understanding Asian swamp eel acute and chronic thermal limits may be useful in assessing dispersal risk and range expansion in the southeastern USA.

至少从1994年开始，美国东南部就已经建立了亚洲鳗e （Monopterus albus / javanensis [Zuiew，1973 / Lacepede 1800]），但其在低温下生存的能力鲜为人知。我们使用标准的热学方法来量化低温响应，并提供沼泽鳗鱼对低温的反应的详细描述。当暴露于1.0°C一天^-1的慢性温度降低时，sw鱼在15.0°C时停止觅食，在11.0°C以下时运动明显减少，在9.6°C附近失去活动能力。在关键的最低热试验中，沼泽鳗鱼暴露于急性温度下降（0.25°C min ^-1）的温度低至6.2°C。e鱼表现出适度的冷驯化响应，驯化温度每下降1°C，其耐寒性就会提高0.23°C。逐步将鳗鱼适应于20.5°C的时间序列临界热最低温度（CTmin）估算，然后急剧降低至16.0°C，这表明冷适应可能仅在8天之内发生。在其本地范围内的鳗鱼边缘种群定期经历较冷的冬季温度，这可能解释了引进种群在佛罗里达州冬季冷锋中生存的能力。了解亚洲沼泽鳗的急性和慢性热极限可能有助于评估美国东南部的扩散风险和范围扩大。