Intra-specific variation in strategic ejaculation according to level of polyandry in Callosobruchus chinensis

Takashi Yamane, Takahisa Miyatake

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Optimal sperm allocation should differ according to the level of polyandry within a population, because the risk of sperm competition depends on the remating frequency of females. We compared the number of sperm ejaculated by males into the female reproductive organ between strains with different levels of polyandry in the adzuki bean beetle, Callosobruchus chinensis (Coleoptera: Bruchidae) when males were reared in different larval densities in a bean. The results showed that males derived from a population with a higher level of polyandry increased ejaculatory expenditure when they were reared under higher larval densities. We discuss the evolutionary correlation of ejaculatory expenditure to the level of polyandry.

Original languageEnglish
Pages (from-to)1240-1243
Number of pages4
JournalJournal of Insect Physiology
Volume51
Issue number11
DOIs
Publication statusPublished - Nov 2005

Fingerprint

Callosobruchus chinensis
Ejaculation
polyandry
ejaculation
Beetles
Health Expenditures
Spermatozoa
Sperm Count
spermatozoa
Population
Bruchidae
sperm competition
gonads
beans
Coleoptera
intraspecific variation

Keywords

  • Adzuki bean beetle
  • Differential allocation
  • Ejaculatory expenditure
  • Larval density
  • Sperm competition

ASJC Scopus subject areas

  • Insect Science
  • Physiology

Cite this

Intra-specific variation in strategic ejaculation according to level of polyandry in Callosobruchus chinensis. / Yamane, Takashi; Miyatake, Takahisa.

In: Journal of Insect Physiology, Vol. 51, No. 11, 11.2005, p. 1240-1243.

Research output: Contribution to journalArticle

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