Behavioural optimization of body temperature by nymphal grasshoppers (Melanoplus sanguinipes, Orthoptera: Acrididae) in temperature gradients established using incandescent bulbs

摘要: 1. 1. Body temperatures (Tb) of Melanoplus sanguinipes F. nymphs were measured in temperature gradients established using incandescent light bulbs. 2. 2. Relative frequency distributions possible Tb estimated by linking equations describing the effects distance from bulb and orientation to it. 3. 3. The distribution was significantly different that expected if insects positioned themselves randomly, 35 ≤ 43°C occurred more frequently than expected; this is conclusive evidence for behavioural thermoregulation. 4. 4. modal Tb, 40°C, approximated maximum rates feeding (38.6°C) development (42.2°C); at both occur > 95% their rate.