Effects of starvation on death-feigning in adults of Cylas formicarius (coleoptera: brentidae)

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Abstract

Effects of starvation on death-feigning behavior, or thanatosis, were observed in adults of the sweetpotato weevil, Cylas formicarius (F.). A significantly lower proportion of death-feigned adults was observed in starved weevils compared with unstarved controls in both sexes. However, females needed a longer starvation period than males to show the decreased proportion of death-feigning. This contrast between males and females was caused by a differential tolerance of the sexes for starvation, because males died earlier than females without food. Starved male weevils had a shorter duration to recover from the death-feigning. There may be situations where C. formicarius gives priority to assuring food consumption compared with escaping from predators.

Original languageEnglish
Pages (from-to)612-616
Number of pages5
JournalAnnals of the Entomological Society of America
Volume94
Issue number4
DOIs
Publication statusPublished - Jan 1 2001

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Keywords

  • Cylas formicarius
  • Death mimicry
  • Sexual difference
  • Sweetpotato weevil
  • Thanatosis

ASJC Scopus subject areas

  • Insect Science

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