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Oecologia

, Volume 63, Issue 3, pp 314–319 | Cite as

Dynamics of the wax bloom of a seasonal Namib Desert tenebrionid, Cauricara phalangium (Coleoptera: Adesmiini)

  • E. McClain
  • R. L. Praetorius
  • S. A. Hanrahan
  • M. K. Seely
Original Papers

Summary

The dynamics of the extracuticular was bloom in a ‘winter’ species of tenebrionid beetle, Cauricara phalangium, from the Namib Desert were monitored in the field and under laboratory conditions. The beetles possessed a full complement of the white wax material after adult emergence. The amount of this material on the integument declined towards the end of the season. The wax bloom was regenerated in both the field and laboratory, with high temperatures and low humidities bringing about greatest renewal. End of the season decline appears tobe related to the senescence of these seasonal beetles. Water loss rates differed significantly for individuals collected in May, when fully bloomed, and in August when little or no wax bloom was present. The wax bloom material contributes to the protection of these diurnal beetles against the high temperatures and radiant heat loads in the Namib Desert.

Keywords

Laboratory Condition Water Loss Loss Rate Radiant Heat Heat Load 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Besler H (1972) Klimaverhältnisse und klimageomorphologische Zonierung der zentralen Namib (Südwestafrika). Stuttgarter Geographische Studien 83:1–209Google Scholar
  2. Buck J, Hanrahan SA (1982) Waxy secretion from the cuticle of Namib Desert tenebrionids. The Zoological Society of South Africa Occasional Bulletin 2:8Google Scholar
  3. Crowson RA (1981) The biology of the Coleoptera, Academic Press, New YorkGoogle Scholar
  4. Edney EB (1977) Water balance in land arthropods. Springer, Berlin Heidelberg New YorkGoogle Scholar
  5. Hadley NF (1979) Wax secretion and color phases of the desert tenebrionid beetle Cryptoglossa verrucosa (LeConte). Science 293:367–369Google Scholar
  6. Hadley NF (1981) Cuticular lipids of terrestrial plants and arthropods: a comparison of their structure, composition and waterproofing function. Biol Rev 56:23–47Google Scholar
  7. Hadley NF (1982) Cuticle ultrastructure with respect to the lipid waterproofing barrier. J exp Zoology 222:239–248Google Scholar
  8. Hamilton III WJ (1975) Coloration and its thermal consequence for diurnal desert insects. In: Hadley NF (ed) Environmental Physiology of Desert Organisms. Dowden, Hutchinson and Ross Inc., Pennsylvania, pp 67–89Google Scholar
  9. Henwood K (1975a) A field-tested thermoregulation model for two diurnal Namib Desert tenebrionid beetles. Ecology 56:1329–1342Google Scholar
  10. Henwood K (1975b) Infrared transmittance as an alternative thermal strategy in the desert beetle Onymacris plana. Science 189:993–994PubMedGoogle Scholar
  11. McClain E (1982) The role of the cuticle in the adaptation of tenebrionid beetles to the Namib Desert. The Zoological Society of South Africa Occasional Bulletin 2:41Google Scholar
  12. McClain E, Seely MK, Hadley NF, Gray V (1984a) The occurrence, distribution and lipid composition of was blooms in Namib Desert tenebrionid beetles: correlations with the physical environment. Ecology (in press)Google Scholar
  13. McClain E, Savage M, Knott K (1984) Relectivity of the cuticle of a Namib Desert Tenebrionid Cauricara phalangium with a wax bloom, S Afric J Sci 80:183–184Google Scholar
  14. Penrith ML (1975) The species of Onymacris Allard (Coleoptera: Tenebrionidae). Cimbebasia (A) 4:48–97Google Scholar
  15. Penrith ML (1977) The zophosini (Coleoptera: Tenebrionidae) of western southern Africa. Cimbebasia Memoir 3:1–291Google Scholar
  16. Penrith ML (1979) Revision of western southern African Adesmiini (Coleoptera: Tenebrionidae). Cimbebasia (A) 5:3–94Google Scholar
  17. Penrith ML (1980) Revision of the Zophosini (Coleoptera: Tenebrionidae). Part 1. Introduction. Cimbebasia (A) 6:1–16Google Scholar
  18. Robinson MD, Seely MK (1980) Physical and biotic environments of the southern Namib dune ecosystem. J Arid Environ 3:183–203Google Scholar
  19. Seely MK, Louw GN (1980) First approximation of the effects of rainfall on the ecology and energetics of a Namib Desert dune ecosystem. J Arid Environ 3:25–54Google Scholar
  20. Siegel S (1956) Nonparametric statistics for the behavioral sciences. McGraw-Hill, New YorkGoogle Scholar

Copyright information

© Springer-Verlag 1984

Authors and Affiliations

  • E. McClain
    • 1
  • R. L. Praetorius
    • 1
  • S. A. Hanrahan
    • 2
  • M. K. Seely
    • 1
  1. 1.Desert Ecological Research UnitSwakopmundSWA/Namibia
  2. 2.Department of ZoologyUniversity of the WitwatersrandJohannesburgSouth Africa

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