Determinants of mating frequency in the spiny orbweaving spider, Micrathena gracilis (Araneae: Araneidae)

摘要: Male Micrathena gracilis require two copulations, separated by a dismount, in order to inseminate both reproductive tracts of the female. We examined several factors that might influence male's copulatory success. Web structure influenced male courtship and dismount tactics, but not frequency. The presence another reduced likelihood given copulating with tracts, limitation mediated sexual responsiveness Mating status female did frequency; males were less likely copulate second time nonvirgin females. In summary, modify mating activities reduce predation females, intermale competition, avoid expending gametes when there is little chance fertilization. Females predatory activities, through web structure, enhancing sperm competition among males.