CHEMOECOLOGY

, Volume 16, Issue 4, pp 185–189 | Cite as

Effect of bombardier beetle spray on a wolf spider: repellency and leg autotomy

  • Thomas Eisner
  • Daniel Aneshansley
  • Marta L. del Campo
  • Maria Eisner
  • J. Howard Frank
  • Mark Deyrup
Original Paper

Summary.

Data are presented on the repellency of the spray of a bombardier beetle (Pheropsophus aequinoctialis) to a lycosid spider (Lycosa ceratiola). The secretion is shown to cause the spider to desist from its assault on the beetle within, on average, 58 ms of onset of the beetle’s secretory emission, a reaction time that is at a par with latencies previously reported for startle, escape, and avoidance reactions of cockroaches, flies, and moths. Spray ejections by the beetle, are shorter in duration (43 ms, on average) than the response time of the spider, an indication that the beetle does indeed pack a formidable “punch” into its ejection. After being hit by a beetle’s spray, L. ceratiola were found occasionally to autotomize one or two of their legs. It is argued, but not proven, that this unusually severe effect from exposure to an arthropodan defensive secretion may be caused by the high temperature of the bombardier beetle spray.

Key words.

Carabidae Lycosidae Pheropsophus aequinoctialis Lycosa ceratiola 1,4-benzoquinones chemical defense predation repellency autotomy coevolution 

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Copyright information

© Birkhäuser Verlag, Basel 2006

Authors and Affiliations

  • Thomas Eisner
    • 1
  • Daniel Aneshansley
    • 2
  • Marta L. del Campo
    • 1
  • Maria Eisner
    • 1
  • J. Howard Frank
    • 3
  • Mark Deyrup
    • 4
  1. 1.Department of Neurobiology and BehaviorCornell UniversityIthacaUSA
  2. 2.Department of Biological and Environmental EngineeringCornell UniversityIthacaUSA
  3. 3.Entomology and Nematology DepartmentUniversity of FloridaGainesvilleUSA
  4. 4.Archbold Biological StationLake PlacidUSA

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