caa a22 4500 465788904 CHVBK 20180323112017.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF01052115 doi (NATIONALLICENCE)springer-10.1007/BF01052115 Behavioral thermoregulation in palmipenna aeoleoptera (neuroptera): Do the hypertrophied hindwings play a role? [Elektronische Daten] [Belle Leon, Mike Picker] The hypertrophied hindwings of Palmipenna aeoleoptera (Neuroptera) were examined for a possible thermoregulatory role. These wings arise from basal stalks which expand into large, flattened, darkly pigmented, and vascularized dilations. During the cooler times of the day the insects basked by crouching with the body and hindwings held horizontally in contact with rocks. As air temperatures increased, insects stilted with the hindwings held at 90° to the horizontal. Thoracic temperatures of these ectotherms correlated with air temperatures (Tthorax = 1.55Tair −10.99), with maximum recorded thoracic temperatures of 47°C. No differences were found between thoracic temperatures of males and those of females, although males had far larger hindwings. Live insects caught on rocks were consistently cooler than dead insects (operational temperature thermometers) on rocks. This may be attributed to convective cooling in flight just prior to capture, and stilting, behavior patterns that were frequent during the hottest times of the day. Thoracic temperatures of insects resting on rocks were frequently higher than operational temperature thermometers in air, suggesting that warming resulted from basking on rocks. The minimum body temperature for flight was 27°C. In the laboratory, hindwing ablation altered neither the rate (using time constants) of heating or cooling nor the equilibrium temperature of the body, showing that the hindwings play no direct role in heat uptake or loss. Plenum Publishing Corporation, 1990 Neuroptera nationallicence insect thermoregulation nationallicence wing function nationallicence modified hindwing nationallicence stilting nationallicence basking nationallicence Leon Belle Physiology Department, Medical School, University of Cape Town, 7925, Observatory, South Africa aut Picker Mike Zoology Department, University of Cape Town, 7700, Rondebosch, South Africa aut Journal of Insect Behavior Kluwer Academic Publishers-Plenum Publishers 3/3(1990-05-01), 381-393 0892-7553 3:3<381 1990 3 10905 https://doi.org/10.1007/BF01052115 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01052115 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Leon Belle Physiology Department, Medical School, University of Cape Town, 7925, Observatory, South Africa aut NATIONALLICENCE 700 1- Picker Mike Zoology Department, University of Cape Town, 7700, Rondebosch, South Africa aut NATIONALLICENCE 773 0- Journal of Insect Behavior Kluwer Academic Publishers-Plenum Publishers 3/3(1990-05-01), 381-393 0892-7553 3:3<381 1990 3 10905 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer