Immature performance linked with exaggeration of a sexually selected trait in an armed beetle

Kensuke Okada, M. Katsuki, Y. Okada, Takahisa Miyatake

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Exaggerated traits can be costly and are often trade-off against other characters, such as life-history traits. Thus, the evolution of an exaggerated trait is predicted to affect male life-history strategies. However, there has been very little experimental evidence of the impact of the evolution of sexually selected traits on life-history traits. This study investigated whether increased investment in exaggerated traits can generate evolutionary changes in the life-history strategy for armed males. Male flour beetles, Gnatocerus cornutus, have enlarged mandibles that are used in male-male competition, but females lack this character exaggeration completely. We subjected these weapons to 11 generations of bidirectional selection and found a correlated response in pupal survival but not in larval survival or adult longevity in the male. That is, selecting for male mandibles negatively impacted survival during the production of mandibles. There is no correlated response in the life-history traits of the female.

Original languageEnglish
Pages (from-to)1737-1743
Number of pages7
JournalJournal of Evolutionary Biology
Volume24
Issue number8
DOIs
Publication statusPublished - Aug 2011

Fingerprint

beetle
immatures
Coleoptera
life history
life history trait
correlated responses
Gnatocerus cornutus
Tenebrionidae
weapon
trade-off

Keywords

  • Horned beetle
  • Resource allocation
  • Sexual selection
  • Trade-off
  • Weapon

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

Immature performance linked with exaggeration of a sexually selected trait in an armed beetle. / Okada, Kensuke; Katsuki, M.; Okada, Y.; Miyatake, Takahisa.

In: Journal of Evolutionary Biology, Vol. 24, No. 8, 08.2011, p. 1737-1743.

Research output: Contribution to journalArticle

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