Rhythmic thermoregulation in larval cranefly (Diptera: Tipulidae)

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Abstract
The behaviour of fourth-instar larvae of a cranefly Tipula plutonis was examined in a horizontal thermal gradient. Under a 12 h light: 12 h dark cycle, larvae displayed a diel rhythm of preferred temperatures. Maximum temperatures (16–18 °C) were selected during the scotophase and minimum temperatures (12–14 °C) were selected during the photophase of the light–dark cycle. Under constant illumination, temperature selection continued as an endogenous free-running circadian rhythm of behavioural thermoregulation.

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