Sperm competition and adaptive significance of prolonged post-copulatory mounting in Oxya yezoensis (Orthoptera: Catantopidae)
小翅稻蝗的精子竞争及交配行为的适应意义

Females copulate with multiple males in almost all insect species. This behavior allows different males to compete for fertilization and gives females the opportunity to mediate this competition. The eggs are typically fertilized by sperm from only one male, either the female's last mate or an earlier mate. The rice grasshopper, Oxya yezoensis Shiraki, shows not only multiple copulation, but also prolonged copulation and prolonged post-copulatory mounting between males and females. In this paper, sperm comp...