Effects of maternal age on reproductive traits and fitness components of the offspring in the bruchid beetle, Callosobruchus chinensis (Coleoptera: Bruchidae)

Shin Ichi Yanagi, Takahisa Miyatake

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

In many insect species, the size and number of eggs decrease with maternal age. Thus, both the size and number of eggs must be considered to know the exact cost of reproduction with maternal age. The resource depletion hypothesis was examined in the bruchid beetle Callosobruchus chinensis. The hypothesis explains why the egg size decreases with maternal age based on the decline of the female's reproductive capacity. A decrease was found in reproductive effort (= egg size × the number of eggs) and the fitness component of offspring with maternal age. The effects of the female's nutritional status on the relationship between maternal age and the reproductive effort of females with and without food and water were also examined. The results indicate that the decrease in size and number of eggs with maternal age can be explained by the resource depletion hypothesis in C. chinensis.

Original languageEnglish
Pages (from-to)261-266
Number of pages6
JournalPhysiological Entomology
Volume27
Issue number4
DOIs
Publication statusPublished - Dec 1 2002
Externally publishedYes

Keywords

  • Callosobruchus chinensis
  • Cost of reproduction
  • Egg size
  • Maternal age
  • Reproductive effort
  • Resource depletion

ASJC Scopus subject areas

  • Physiology
  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

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