A swimming activity assay shows that the thermal tolerance of Daphnia magna is influenced by temperature acclimation
A swimming activity assay shows that the thermal tolerance of Daphnia magna is influenced by temperature acclimation
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DOI：
10.1139/z04-141
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发表时间：
2004-10
影响因子：
1.4
通讯作者：
B. Zeis;J. Maurer;Olaf Pinkhaus;Eva Bongartz;R. Paul
中科院分区：
文献类型：
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作者：
B. Zeis;J. Maurer;Olaf Pinkhaus;Eva Bongartz;R. Paul
水蚤（Daphnia magna Straus, 1820）是一种分布广泛的浮游动物，在其自然栖息地的氧气浓度和温度变化很大。以动物游泳活动为测试参数，用光度法分析了D. magna的热耐受窗口。不同温度（10℃、20℃、30℃）的驯化导致热最适值随驯化条件的变化而变化。在急性热耐受性试验中，对温暖温度的驯化也提高了热耐受性上限。然而，由此产生的急性热耐受性（LT50）的变化幅度要小得多。驯化温度每升高10℃，热最适值的变化幅度约为该值，而LT50仅升高1-2℃。在驯化过程的时间过程之后，研究了将在20°C培养基中饲养的动物转移到30°C培养基时的温度依赖游泳活动。最大游泳强度……
Daphnia magna Straus, 1820 is a widespread zooplanktic organism enduring considerable changes in oxygen concentration and temperature within its natural habitat. The thermal tolerance window of D. magna was analyzed using the animals' swimming activity as a test parameter in a photometrical assay. Acclimation to different temperatures (10, 20, 30 °C) resulted in a shift of the thermal optimum corresponding to acclimation conditions. Acclimation to warm temperatures also increased the upper thermal tolerance limit in acute thermal tolerance tests. However, the magnitude of the resulting shift in the acute thermal tolerance (LT50) was much smaller. An increase in acclimation temperature by 10 °C changed the thermal optimum by approximately this value, whereas the LT50 was enhanced only by 1–2 °C. The time course of the acclimation process was followed by surveying temperature-dependent swimming activity upon the transfer of animals raised in a medium at 20 °C to a medium at 30 °C. Maximum swimming intensity...