volume | PIER Journals

Abstract

Our investigation entailed a thermal analysis of hornets engaging in ventilation activity at the nest entrance. In the hot summer months, between July-October, ventilating worker hornets are seen just outside the nest entrance, where they assume a typical stance, namely, with their feet erect and fastened to the substrate, their abdomen bent downward at a 90^o angle to the thorax, their antennae vibrating, and their wings beating rapidly for minutes at a time. Eventually these hornets leave their position, either to retreat into the nest or else to fly off to the field, and are replaced by new hornets that assume the ventilation task. Infra-red (IR) photography reveals that in the course of the ventilation activity, the warmest region in the ventilating hornet body is the anterior upper part of the thorax, and the coolest regions are the wings, limbs, antennae and abdomen. This study involved precise and repeated measurements via IR photography of the temperature in the various body parts of the ventilating hornets, and it also offers a preliminary, tentative explanation for the observed differential body temperature. The communication value of the color of the hornet body when ventilating is discussed.

1. Ishay, J., H. Bytinski-Saltz, and A. Shulov, "Contributions to the bionomics of the oriental hornet Vespa orientalis," Israel J. Entomol., Vol. II, 45-106, 1967.

2. Guiglia, D., Les Quêpes Socials (Hymenoptera Vespidae), Masson et Cie Editeurs, 1972.

3. Spradbery, J. P., Wasps, Sidgwick and Jackson, 1973.

4. Ishay, J. and F. Ruttner, "Die thermoregulation im hornisennest," Z. v. Physiol., Vol. 72, 423-434, 1971.
doi:10.1007/BF00300713

5. Edwards, R., Social Wasps, Rentokil Ltd, 1980.

6. Riabinin, K., M. Kozhevnikov, and J. S. Ishay, "Ventilating activity at the hornet nest entrance," J. Ethol., Vol. 22, No. 1, 49-53, 2004.
doi:10.1007/s10164-003-0098-7

7. Sotavalta, O., "The flight-tone (wing-stroke frequency) of insects," Acta Ent. Fenn., Vol. 4, 1-117, 1947.

8. Sadeh, D., J. Ishay, and R. Yotam, "Hornet ventilation noise: Rhythm and energy content," Experientia, Vol. 33, No. 3, 335-337, 1977.
doi:10.1007/BF02002813

9. Ishay, J. S. and D. Sadeh, "The sounds of honey bees and social wasps are always composed of a uniform frequency," J. Acoust. Soc. America, Vol. 72, No. 3, 671-675, 1982.
doi:10.1121/1.388247

10. Ishay, J. S., V. Pertsis, E. Rave, A. Goren, and D. J. Bergman, "Natural thermoelectric heat pump in social wasps," Physical Review Letters, Vol. 90, No. 21, 81021-81024, 2003.
doi:10.1103/PhysRevLett.90.218102

11. Jongebloed, W. L., E. Rosenzweig, D. Kalicharan, and J. S. Ishay, "Are ciliary hair cells and photoreceptors components of a gravitic system of the hornet Vespa orientalis," J. Grav. Phys., Vol. 5, No. 1, 135-136, 1998.

12. Kalicharan, D., W. L. Jongebloed, L. I. Los, and L. G. F. Worst, "Application of tannic acid non coating technique in eye research: Lens capsule and cataractous lens fibres," Bear Electronenmikroskop Direktabb. Oberfl., Vol. 25, 201-205, 1992.

13. Stabentheiner, A. and S. Schmaranzer, "Thermographic determination of body temperatures in honey bees and hornets: Calibration and applications," Thermology, Vol. 2, No. 4, 563-572, 1987.

14. Himmer, A., "Ein beitrag zur kenntnis des wärmehaushaltes im nestbau sozialer hautflügler," Z. Physiol., Vol. 5, 375-389, 1927.

15. Ishay, J. and F. Ruttner, "Die thermoregulation im hornisennest," Z. v. Physiol., Vol. 72, 423-434, 1971.
doi:10.1007/BF00300713

16. Seeley, T. and B. Heinrich, "Regulation of temperature in the nests of social insects," Insect Thermoregulation, 159-234, 1981.

17. Ishay, J. S., E. Pines, and D. Huppert, "Time resolved photoluminescence study of hornet cuticle," Comp. Biochem. Physiol., Vol. 95A, No. 4, 497-500, 1990.
doi:10.1016/0300-9629(90)90730-G

18. Ishay, J. S and J. Gavan, "Hypothesis stipulating that a natural RADAR navigational system guides hornet flight," Journal of Infrared and Mil limeter Waves and Applications, Vol. 13, 1611-1625, 1999.

19. Gavan, J. and J. S. Ishay, "Hypothesis of natural RADAR detection and navigational system guides hornets flight," International Journal of Infrared and Mil limeter Waves, Vol. 21, No. 2, 309-320, 2000.
doi:10.1023/A:1006669321663

20. Gavan, J. and J. S. Ishay, "Hypothesis of natural radar detection and navigational system guides hornets flight," 24th International Symposium of IR and Mm Waves, No. 9, 1-2, 1999.

21. Gavan, J. and J. S. Ishay, "Hypothesis of natural radar detection, navigation and direction finding tracking systems guiding hornets flight," LEE International Conference in Tel-Aviv Israel, No. 5, 134-137, 2000.

22. Callahan, P. S., "Far-infrared emission and detection by nigh-flying moths," Nature, Vol. 207, 1175-1183, 1965.

23. Hsia, H. S. and C. Susskind, "Infrared and microwave communication by moths," IEEE Spectrum, No. 3, 69-76, 1970.

24. Kovac, H. and A. Stabentheiner, "Effect of food quality on the body temperature of wasps (Paravespula vulgaris)," J. Insect Physiol., Vol. 45, 183-190, 1999.
doi:10.1016/S0022-1910(98)00115-2

25. Stabentheiner, A., "Thermoregulation of dancing bees: thoracic temperature of pollen and nectar foragers in relation to profitability of foraging and colony need," J. Insect Physiol., Vol. 47, 385-392, 2001.
doi:10.1016/S0022-1910(00)00132-3

26. Stabentheiner, A., H. Kovac, and S. Schmaranzer, "Honeybee nestmate recognition: the thermal behavior of guards and their examinees," J. Exp. Biol., Vol. 205, 2637-2642, 2002.

27. Feuerbacher, E., J. H. Fewell, S. P. Roberts, E. F. Smith, and J. F. Harrison, "Effects of load type (pollen or nectar) and load mass on hovering metabolic rate and mechanical power output in the honey bee Apis mel lifera," J. Exp. Biol., Vol. 206, 1855-1865, 2003.
doi:10.1242/jeb.00347

28. Moffatt, L., "Metabolic rate and thermal stability during honeybee foraging at different rewards rates," J. Exp. Biol., Vol. 204, 759-766, 2001.

29. Schmaranzer, S., "Thermoregulation of water collecting honey bees (Apis mel lifera)," J. Insect Physiol., Vol. 46, 1187-1194, 2000.
doi:10.1016/S0022-1910(00)00039-1

30. Wathen, P., J. W. Mitchel, and W. P. Porter, "Theoretical and experimental studies of energy exchange from jackrabbit ears and cylindrically shaped appendages," Biophys. J., Vol. 11, 1030-1047, 1971.

31. Porter, W. P., J. C. Munger, W. E. Stewart, S. Budaraju, and J. Jaeger, "Endotherm energetics: from a scalable individual-based model to ecological applications," Austral. J. Zool, Vol. 42, 125-162, 1994.
doi:10.1071/ZO9940125

32. Bishop, J. A. and W. S. Armbruster, "Thermoregulatory abilities of Alascan bees: effects of size, phylogeny and ecology," Functional Ecol., Vol. 13, 711-724, 1999.
doi:10.1046/j.1365-2435.1999.00351.x

33. Seeley, T., M. Kleinhenz, B. Bujok, and J. Tautz, "Thorough warm-up before take-off in honey bee swarms," NaturWissenschaften, Vol. 90, 256-260, 2003.
doi:10.1007/s00114-003-0425-4

34. Stabentheiner, A., J. Vollmann, H. Kovac, and K. Crailsheim, "Oxygen consumption and body temperature of active and resting honeybees," J. Insect Physiol., Vol. 49, 881-889, 2003.
doi:10.1016/S0022-1910(03)00148-3

35. Watanabe, M. and T. Imoto, "Thermoregulation and flying habits of the Japanese sulfur butterfly Colias erate (Lepidoptera: Pieridae) in an open habitat," Entomol. Scien., Vol. 6, 111-118, 2003.
doi:10.1046/j.1343-8786.2003.00017.x

36. Kreuger, B. and D. A. Potter, "Diel feeding activity and thermoregulation by Japanese beetles (Coleoptera: Scarabaeidae) within host plant canopies," Environ. Entomol., Vol. 30, No. 2, 172-180, 2001.

37. Sanborn, A. F., L. M. Perez, C. G. Valdes, and A. K. Seepersaud, "Wing morphology and minimum flight temperature in cicadas (Insecta: Homoptera: Cicadoidea)," FASEB J., Vol. 15, No. 5, 2001.

38. Sanborn, A. F., "Thermoregulation and endothermy in the large western cicada Tibicen cultriformis (Hemiptera: Cicadidae)," J. Therm. Biol., Vol. 29, 97-101, 2004.
doi:10.1016/j.jtherbio.2003.11.007

39. Heinrich, B., Insect Thermoregulation, Wiley-Interscience Publication, 1981.

40. Nation, J. L., Insect Physiology and Biochemistry, Boca Raton, 2002.

41. Ishay, J. S., L. Litinetsky, and D. Steinberg, "Architecture and composite structure of hornet cuticle (Insecta: Hymenoptera)," Composite Structures, Vol. 46, 387-394, 1999.
doi:10.1016/S0263-8223(99)00105-1

Dr. Jacob Ishay

Dr. Marian Plotkin

Dr. Natalya Ermakov

Dr. Alon Goren

Dr. David J. Bergman