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The functional significance of silk decorations of orb‐web spiders: a critical review of the empirical evidence
- M. Herberstein, C. Craig, J. Coddington, M. Elgar
- BiologyBiological reviews of the Cambridge Philosophical…
- 1 November 2000
A phylogenetic analysis of the different decoration patterns suggests that the different types of decorations are as evolutionary labile as the decorations themselves: the analysis shows little homology and numerous convergences and independent gains.
Foraging strategies and feeding regimes: Web and decoration investment in Argiope keyserlingi Karsch (Araneae: Araneidae)
Spiders experiencing low prey encounter rates constructed larger webs and incorporated more silk but fewer web decorations than spiders experiencing high prey encounter Rates, which indicates foraging success by attracting prey to the web.
Sperm competition and small size advantage for males of the golden orb‐web spider Nephila edulis
Paternity was strongly associated with the duration of copulation, independent of mating order, and small males had a clear mating advantage, they copulated longer than large males and fertilized more eggs.
Female praying mantids use sexual cannibalism as a foraging strategy to increase fecundity
It was found that the prevalence of sexual cannibalism in this system was indeed affected by female body condition; females in poor condition were more likely to consume their potential mates than females in good condition, providing clear evidence for the foraging strategy hypothesis as an explanation for the maintenance ofSexual cannibalism for this species.
Colouration in crab spiders: substrate choice and prey attraction
- A. M. Heiling, L. Chittka, K. Cheng, M. Herberstein
- Biology, MedicineJournal of Experimental Biology
- 15 May 2005
Yellow spiders on white flowers were the only pairing where bees rejected spider-occupied flowers, especially in cases where the contrast between the two was relatively strong, and T. spectabilis select flower colours adaptively in a way that deceives honeybees, or at least does not deter them.
Evidence for diet effects on the composition of silk proteins produced by spiders.
- C. Craig, C. Riekel, M. Herberstein, R. Weber, D. Kaplan, N. Pierce
- Biology, MedicineMolecular biology and evolution
- 1 December 2000
It is found that individual spiders of the same species can spin dragline silks (drawn from the spider's ampullate gland) that vary in content as well, suggesting that variation in silk composition reflects the type of prey the spiders were fed but not the total amount of prey they received.
Risky mate search and mate preference in the golden orb-web spider (Nephila plumipes)
This study examines mate-searching success in a highly sexually dimorphic species, the golden orb-web spider (Nephila plumipes), and shows that despite the high-density aggregations of this species, male survival is extremely low (36%) and is phenotype independent.
Asymmetry in spider orb webs: a result of physical constraints?
Test the effect of weight increase on web asymmetry by naturally increasing weight through feeding and by artificially adding lead weights to the abdomen of the spiders, which resulted in more asymmetric webs through a reduction of the upper web region.
The role of UV in crab spider signals: effects on perception by prey and predators
- A. M. Heiling, K. Cheng, L. Chittka, A. Goeth, M. Herberstein
- BiologyJournal of Experimental Biology
- 15 October 2005
The results reveal that a clean physical elimination of reflection in the UV range affects perception in predators and prey and ultimately changes the behaviour of prey.
Spider signals: are web decorations visible to birds and bees?
Spectrophotometric analyses are used to show that the decorations of all five tested spider species are visible to honey bees and birds over short and long distances, and that the discoid decorations of one species may provide some protection against arthropod predators.