Experimental limitation of oviposition sites affects the mating system of an arachnid with resource defence polygyny

摘要: The availability and spatial distribution of reproductive resources determine female distribution, thus affecting the organization mating systems intensity sexual selection. Females harvestman Serracutisoma proximum lay eggs on specific plant species, which are defended by males large morph (majors). After oviposition, females remain inside major's territory, forming a harem, may be invaded small (minors) to sneak copulations. We experimentally manipulated plants used as oviposition sites, investigated how it affected system S. proximum. Our results show that minors moved preferentially plots with high availability. Plots had more harems, were established preferred plants. In low availability, many laid where S. proximum clutches never been observed previously, rather than choosing part harem plant. Harem invasions accomplished both majors, frequency was not influenced Finally, male–male competition for harems potential selection also Female plasticity in site use probably attenuates among allowing poorly developed weaponry establish territory achieve Minors apparently adjust their response density, but income does increase Plasticity major tactic accounts invasions, regardless argue behavioural profoundly affect our ability make predictions about effects limitation species exhibiting resource defence polygyny.