Environment and Local Substrate Availability Effects on Harem Formation in a Polygynous Bark Beetle.

摘要: Many forms of polygyny are observed across different animal groups. In some species, groups females may remain with a single male for breeding, often referred to as “harem polygyny”. The environment and the amount habitat available feeding, mating oviposition have an effect on formation harems. We aimed determine how surrounding (a harvested or unharvested pine plantation) availability local substrate affect harems bark beetle, Ips grandicollis (Coleoptera: Curculionidae: Scolytinae). plantation large amounts habitat, population density these beetles is much higher than in plantations. found number per be significantly greater one. Additionally, immediate vicinity (the logs replicate piles) also influences attracted log size individual examined were distributing themselves their galleries around males’ nuptial chamber, previous work has demonstrated potential competition between neighbouring offspring. Females do not perform clumping, suggesting avoidance when make galleries, but they distribute evenly. Female distribution male’s chamber appears random, influenced by other external conditions.