Physical properties of sticky spirals and their connections: sliding connections in orb webs
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The mechanical properties of the non-sticky spiral in Nephila orb webs (Araneae, Nephilidae).
Detailed information on web geometry and the material properties of the various silks used enables the function of the web's different structures to be elucidated. In this study we investigated the non-sticky spiral in Nephila edulis webs, which in this species is not removed during web building. This permanent non-sticky spiral shows several modifications compared with others, e.g. temporary n...
متن کاملSpider orb webs rely on radial threads to absorb prey kinetic energy.
The kinetic energy of flying insect prey is a formidable challenge for orb-weaving spiders. These spiders construct two-dimensional, round webs from a combination of stiff, strong radial silk and highly elastic, glue-coated capture spirals. Orb webs must first stop the flight of insect prey and then retain those insects long enough to be subdued by the spiders. Consequently, spider silks rank a...
متن کاملWind induces variations in spider web geometry and sticky spiral droplet volume.
Trap building by animals is rare because it comes at a substantial cost. Using materials with properties that vary across environments maintains trap functionality. The sticky spiral silks of spider orb webs are used to catch flying prey. Web geometry, accompanied by compensatory changes in silk properties, may change across environments to sustain web functionality. We exposed the spider Cyclo...
متن کاملThe effects of capture spiral composition and orb-web orientation on prey interception.
Cribellar prey capture threads found in primitive, horizontal orb-webs reflect more light, including ultraviolet wavelengths, than viscous threads found in more derived, vertical orb-webs. Low web visibility and vertical orientation are each thought to increase prey interception and may represent key innovations that contributed to the greater diversity of modern, araneoid orb-weaving spiders. ...
متن کاملOrb Webs in "non-orb Weaving" Ogre-faced Spiders (araneae: Dinopidae): a Question of Genealogy
Observations of web spinning behavior in Costa Rican Dinopis sp. reveal the same behaviors synapomorphic for orb weavers: specifically frame, radius, non-sticky spiral construction, and sticky spiral construction, as well as more detailed motor patterns. Dinopids are therefore highly derived orb weavers, although the behavioral data do not conclusively indicate whether they are more closely rel...
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تاریخ انتشار 2011