Active female courtship behavior and male nutritional contribution to female fecundity in Bruchidius dorsalis (Fahraeus) (Coleoptera: Bruchidae).

摘要: Mating behavior and the male's contribution to female fecundity were studied in bean weevil Bruchidius dorsalis (Fahraeus) (Coleoptera: Bruchidae) comparison with two other species, Callosobruchus chinensis (which infests stored beans) Kytorhinus sharpianus feeds on wild legumes). Only females of B. showed multiple mating characteristic precopulatory that appeared solicit nutritious secretion. In contrast, all species did not copulate multiply show such behavior. dorsalis, decrement male body weight just after copulation indicated seminal fluid weighing as much approximately 7% was transferred female. Fecundity more than eight times higher had copulated ten only once, indicating males paid most nutritional cost egg production. These facts suggest sex role is reversed dorsalis.