Positive genetic correlations between life-history traits and death-feigning behavior in adzuki bean beetle (Callosobruchus chinensis)

Satoshi Nakayama, Takahisa Miyatake

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Usually, several traits in organisms are genetically linked with each other; thus, correlated responses to selection are generally observed. Anti-predator behaviors may be genetically correlated with other traits such as life-history. We compared the life-history traits of individuals derived from two regimes artificially selected for the duration of death feigning in the adzuki bean beetle, Callosobruchus chinensis. The two-way selected regimes include the L-lines with stronger intensity (longer duration and higher frequency) and the S-lines with weaker intensity (shorter duration and lower frequency) of death feigning. L-lines exhibited greater longevity, higher rates of emergence, laid bigger eggs and greater reproductive effort, and also had a tendency of faster development. Fecundity was not significantly different between L- and S-lines. These results provide the novel possibility that death feigning is a potentially advantageous anti-predator behavior that, through a positive genetic correlation with some life-history traits, can bring a higher fitness to an individual adopting this behavior. This novel aspect might explain why death-feigning behavior is prevalent in various taxonomic animal groups.

Original languageEnglish
Pages (from-to)711-722
Number of pages12
JournalEvolutionary Ecology
Volume23
Issue number5
DOIs
Publication statusPublished - Aug 1 2009

Keywords

  • Adzuki bean beetle
  • Anti-predator strategy
  • Death feigning
  • Genetic correlation
  • Life-history traits

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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