Results 241 to 250 of about 4,690 (272)

Ontogenetic Changes in Web Design in Two Orb‐Web Spiders

Ethology, 2010
AbstractThe first orb web built by newly hatched spiders resembles the adult web in its overall form and structure. However, many details show ontogenetic changes. One possible explanation for these changes is that the tiny early‐instar spiders with their minute brains will make more mistakes and build less ‘perfect’ orb webs than older and larger ...
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Elongated orb-webs of Australian ladder-web spiders (Araneidae: Telaprocera) and the significance of orb-web elongation

Journal of Ethology, 2009
Many orb-web spiders build modified, asymmetrical orbs. Ladder-webs (a general term describing highly elongated orb-webs) are extreme examples of modified orbs built by several spider species in different families. Australian ladder-web spiders, Telaprocera (Araneidae), build highly elongated orbs consisting of a centralised orb-like portion with ...
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Wet webs work better: Humidity, supercontraction and the performance of spider orb webs

Journal of Experimental Biology, 2013
Summary Like many biomaterials, spider silk responds to water through softening and swelling. Major ampullate silk, the main structural element of most prey capture webs, also shrinks dramatically if unrestrained or develops high tension if restrained, a phenomenon called "supercontraction".
Cecilia, Boutry, Todd A, Blackledge
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Spider orb web as bioassay for pesticide side effects

Entomologia Experimentalis et Applicata, 1992
AbstractPesticides may affect the predatory and reproductive behaviour of beneficial arthropods short of having direct effects on their survival. We present a bioassay designed to test (ultimately in the field) such hidden effects of agrochemicals in their application concentrations. As a paradigm we chose the web‐building behaviour of the cross spider
F. Samu, F. Vollrath
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Mesh Width Influences Prey Retention in Spider Orb Webs

Ethology, 2006
AbstractOrb‐weaving spiders depend upon the sticky capture spirals of webs to retain insects long enough to be captured. However, insects often escape from orb webs before the spiders can attack them. Therefore, the architectures of orb webs likely reflect strong selective pressure to increase retention times of insects. We experimentally increased the
Todd A. Blackledge, Jacquelyn M. Zevenbergen   +1 more
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Alternative Foraging Modes of Orb Web Weaving Spiders

Biotropica, 1989
Forest-understory, orb weaving spiders display at least two, alternative, foraging modes. Large spiders build one large web per feeding period. Although their webs intercept more prey than webs built by small spiders, the biomass of captured prey relative to spider biomass is low.
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Transmission and attenuation of vibration in orb spider webs

Journal of Theoretical Biology, 1982
Abstract Numerous observations indicate that orb spiders react to web-borne vibrations during prey capture, courtship and the rearing of young, but there have been very few analyses of the physics of spider webs undergoing vibration. Using measured or estimated physical properties for spiders and webs from previous literature, we have developed ...
Cliff Frohlich, Ruth E. Buskirk
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Aging and foraging efficiency in an orb-web spider

Journal of Ethology, 2014
Aging is often associated with reduced behavioral performance such as decreased locomotion or food consumption, related to a deterioration in physiological functions. In orb-web spiders, webs are used to capture prey and aging can affect web-building behavior and web structure.
Anotaux, Mylène, Toscani, Camille, Leborgne, Raymond, Châline, Nicolas, Pasquet, Alain   +4 more
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An analysis of the orientation of an orb-web spider

Journal of Theoretical Biology, 2010
In nature, orb-web spinning spiders are often observed residing on the hub of their web, facing down. An explanation of this phenomenon has only recently appeared in the literature [Zschokke, S., Nakata, K., 2010. Spider orientation and hub position in orb webs.
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Web-site selection by orb-web spiders, particularly Argiope aurantia lucas

Animal Behaviour, 1977
Abstract The entire behaviour of selection of web-site by Argiope aurantia is briefly described. Data on the following characteristics of the location of webs are provided: height in the vegetation, orientation of lean of web, use of different types of vegetation within a habitat, and abundance of insects at the site.
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