Web-monitoring forces exerted by orb-web and triangle-web spiders of the family Uloboridae

摘要: Differences in web structure and cephalothorax features suggest that Hyptiotes cavatus should exert more force while monitoring its vertical triangle-web than Uloborus glomosus exerts hanging beneath the hub of horizontal orb-web. When this hypothesis was tested by measuring instars each species exerted on a thread, found to significantly throughout development did glomosus. This relationship holds when either first femur length or body weight is used as an index spider size.