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Keywords: spider
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Journal Articles
J Exp Biol (2022) 225 (24): jeb244223.
Published: 21 December 2022
... of the signal in question. We explored the structure and function of predator–prey signalling in the jumping spider–tephritid fly system, where the prey performs a wing waving display that deters an attack from the predator. Using a custom-built spider retinal tracker combined with visual modelling, as well...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (23): jeb237255.
Published: 11 December 2020
... among traits. A fast-growing predator species with a strict maturation time may be more likely to consume nutritionally imbalanced prey. Here, we tested this hypothesis by examining the effect of the protein-to-lipid ratio in prey on a small sheet web-building spider, Hylyphantes graminicola...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (15): jeb203463.
Published: 7 August 2019
...Fiona R. Cross; Robert R. Jackson ABSTRACT Proficiency at planning is known to be part of the exceptionally complex predatory repertoire of Portia , a genus of jumping spiders (Salticidae) that specialize in preying on other spiders. This includes proficiency at choosing between two detour routes...
Journal Articles
J Exp Biol (2018) 221 (18): jeb174268.
Published: 25 September 2018
... with certain gaits can enable efficient, stable locomotion; however, switching gaits requires complex information flow between and coordination of an animal's limbs. We show here that upon losing two legs, spiders can switch to a novel, more statically stable gait, or use temporal adjustments without a gait...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (7): 1084–1089.
Published: 1 April 2012
... in spiders; they have a distinct socket, a bent hair shaft with fine cuticular ridges, an eccentric double lumen within the hair shaft, and a blunt tip with a subterminal pore. Spigots on the spinnerets have a large bulbous base instead of a socket, a long shaft with a scaly surface and a central terminal...
Journal Articles
J Exp Biol (2011) 214 (20): 3433–3442.
Published: 15 October 2011
...Carlo M. Biancardi; C. Gabriel Fabrica; Patricia Polero; Jefferson Fagundes Loss; Alberto E. Minetti SUMMARY Despite the abundance of octapodal species and their evolutionary importance in originating terrestrial locomotion, the locomotion mechanics of spiders has received little attention so far...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2011) 214 (14): 2375–2380.
Published: 15 July 2011
...Joaquin Ortega-Escobar SUMMARY Previous studies in the wolf spider Lycosa tarantula (Linnaeus 1758) have shown that homing is carried out by path integration and that, in the absence of information relative to the sun's position or any pattern of polarized light, L. tarantula obtains information...
Journal Articles
J Exp Biol (2011) 214 (11): 1874–1879.
Published: 1 June 2011
...F. Claire Rind; Chris Luke Birkett; Benjamin-James A. Duncan; Alexander J. Ranken SUMMARY Like all spiders, tarantulas (family Theraphosidae) synthesize silk in specialized glands and extrude it from spinnerets on their abdomen. In one species of large tarantula, Aphonopelma seemanni , it has been...
Journal Articles
J Exp Biol (2007) 210 (21): 3830–3837.
Published: 1 November 2007
... to arrive at a more comprehensive understanding of its function. We quantified how the brightly colored giant wood spiders Nephila pilipes are viewed by nocturnal insects, and performed field manipulations to assess the function of a spider's coloration in both diurnal and nocturnal conditions. Seen through...
Journal Articles
J Exp Biol (2005) 208 (7): 1401–1411.
Published: 1 April 2005
...Anke Schmitz SUMMARY The CO 2 release of the well-tracheated jumping spider, Marpissa muscosa , and the poorly tracheated, Pardosa lugubris , was tested while animals were running on a treadmill at three different speeds and under a selective elimination of lungs or tracheae. Thus,the influence...
Journal Articles
J Exp Biol (2005) 208 (1): 25–30.
Published: 1 January 2005
...G. V. Guinea; M. Elices; J. Pérez-Rigueiro; G. R. Plaza SUMMARY The spinning of spider silk requires a combination of aqueous environment and stretching, and the aim of this work was to explore the role of stretching silk fibers in an aqueous environment and its effect on the tensile properties...
Journal Articles
J Exp Biol (2004) 207 (10): 1601–1606.
Published: 15 April 2004
... striders and water-walking spiders circumvent this paradox by foregoing any reliance on waves to gain purchase on the water. Instead they use their legs as oars, and the capillary `dimple' formed by each leg acts as the oar's blade. The resulting hydrodynamic drag produces vortices in the water...
Journal Articles
J Exp Biol (2003) 206 (16): 2733–2738.
Published: 15 August 2003
...A. B. Kesel; A. Martin; T. Seidl SUMMARY The feet of the jumping spider Evarcha arcuata attach to rough substrates using tarsal claws. On smooth surfaces, however, attachment is achieved by means of a claw tuft, the scopula. All eight feet bear a tarsal scopula, which is equipped with setae...
Journal Articles
J Exp Biol (2001) 204 (14): 2481–2490.
Published: 15 July 2001
...Marie Dacke; Thuy A. Doan; David C. O’Carroll SUMMARY We describe here the detection of polarized light by the simple eyes of spiders. Using behavioural, morphological, electrophysiological and optical studies, we show that spiders have evolved two different mechanisms to resolve the e-vector...
Journal Articles
J Exp Biol (1992) 164 (1): 227–242.
Published: 1 March 1992
...M. F. Land; F. G. Barth ABSTRACT Much is known about the mechanosensory behaviour of the spider Cupiennius salei Keyserling, but much less about its visual capabilities. In this study the quality of the optical image, the retinal resolution and the fields of view were assessed for each of the four...
Journal Articles
J Exp Biol (1991) 158 (1): 439–461.
Published: 1 July 1991
... for the observed loss of Na + into the prey remains during feeding and their final enrichment with Na + relative to K + . In normally feeding spiders, coxal fluid was hypo-osmotic to the haemolymph. Salt-loading of the prey induced compensatory changes in both systems. Elevation of the Na + or K + content...
Journal Articles
J Exp Biol (1987) 128 (1): 427–444.
Published: 1 March 1987
...Jeffrey W. Shultz ABSTRACT The walking and surface film locomotion of a terrestrial spider, Lycosa rabida Walckenaer, and a semi-aquatic spider, Dolomedes triton (Walckenaer), are compared. Stepping patterns during locomotion on a solid substrate resemble an alternating tetrapod in both species. L...
Journal Articles
J Exp Biol (1986) 125 (1): 85–106.
Published: 1 September 1986
...A. G. Butt; H. H. Taylor ABSTRACT The spider, Porrhothele antipodiana , starved and provided with water, produced urine via the anal excretory system (Malpighian tubules, midgut diverticula and stercoral pocket) at a mean rate of about 2·5- μ lg -1 day -1 and with a mean Na + /K + ratio of about 1...
Journal Articles
J Exp Biol (1985) 118 (1): 379–404.
Published: 1 September 1985
..., subjected to the amounts of elongation that would be produced by a spider on its dragline, is described and illustrated. When major ampullate silk fibres are either wet elongated from supercontraction or when dry from initial lengths, viscoelastic stress relaxations are found to be functions...