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The effect of thermal regimen of cultivation of the hydra hydra oligactis on its heat resistance at different temperatures in short term acclimation



The effect of thermal regimen of cultivation of the hydra hydra oligactis on its heat resistance at different temperatures in short term acclimation



Zhurnal Obshchei Biologii 44(2): 280-283



The effect of different thermal regimes during cultivation on the heat resistance of H. oligactis Pall. was studied. Stable and fluctuating regimes; preceding a short-term (1-day) acclimation at different constant temperatures, were studied. During a stable regime, a linear relation is observed between the heat resistance and acclimation temperature; during a fluctuating regime, this relation is nonlinear, with a zone of independence of the heat resistance on the acclimation temperature. This shows the ability of the hydra to regulate its resistance level under certain conditions.

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