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

brentidae)

Research output: Contribution to journalArticle

36 Citations (Scopus)

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
Publication statusPublished - 2001

Fingerprint

Cylas formicarius
Brentidae
starvation
Coleoptera
death
Curculionidae
Cylas formicarius elegantulus
gender
food consumption
predators
duration

Keywords

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

ASJC Scopus subject areas

  • Insect Science

Cite this

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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.",
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AB - 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.

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