Rodríguez-Gironés, Miguel A.; Corcobado, Guadalupe; Moya-Laraño, Jordi Silk elasticity as a potential constraint on spider body size. (English) Zbl 1407.92020 J. Theor. Biol. 266, No. 3, 430-435 (2010). Summary: Silk is known for its strength and extensibility and has played a key role in the radiation of spiders. Individual spiders use different glands to produce silk types with unique sets of proteins. Most research has studied the properties of major ampullate and capture spiral silks and their ecological implications, while little is known about minor ampullate silk, the type used by those spider species studied to date for bridging displacements. A biomechanical model parameterised with available data shows that the minimum radius of silk filaments required for efficient bridging grows with the square root of the spider’s body mass, faster than the radius of minor ampullate silk filaments actually produced by spiders. Because the morphology of spiders adapted to walking along or under silk threads is ill suited for moving on a solid surface, for these species there is a negative relationship between body mass and displacement ability. As it stands, the model suggests that spiders that use silk for their displacements are prevented from attaining a large body size if they must track their resources in space. In particular, silk elasticity would favour sexual size dimorphism because males that must use bridging lines to search for females cannot grow large. MSC: 92C10 Biomechanics 92C15 Developmental biology, pattern formation Keywords:biomechanics; dispersal; minor ampullate silk; radiation; sexual size dimorphism (SSD) PDFBibTeX XMLCite \textit{M. A. Rodríguez-Gironés} et al., J. Theor. Biol. 266, No. 3, 430--435 (2010; Zbl 1407.92020) Full Text: DOI HAL References: [1] Aisenberg, A.; Viera, C.; Costa, F. G., Daring females, devoted males, and reversed sexual size dimorphism in the sand-dwelling spider Allocosa brasiliensis (Araneae, Lycosidae), Behav. Ecol. Sociobiol., 62, 29-35 (2007) [2] Blackledge, T. A.; Hayashi, C. Y., Silken toolkits: biomechanics of silk fibers spun by the orb web spider Argiope argentata (Fabricius 1775), J. Exp. Biol., 209, 2452-2461 (2006) [3] Blackledge, T. A.; Coddington, J. A.; Gillespie, R. G., Are three-dimensional spider webs defensive adaptations?, Ecol. Let., 6, 13-18 (2003) [4] Blackledge, T. A.; Scharff, N.; Coddington, J. A.; Szuts, T.; Wenzel, J. W.; Hayashi, C. Y.; Agnarsson, I., Reconstructing web evolution and spider diversification in the molecular era, Proc. Natl. Acad. Sci. USA, 106, 5229-5234 (2009) [5] Brose, U.; Jonsson, T.; Berlow, E. L.; Warren, P.; Banasek-Richter, C.; Bersier, L. F.; Blanchard, J. L.; Brey, T.; Carpenter, S. R.; Blandenier, M. F.C.; Cushing, L.; Dawah, H. A.; Dell, T.; Edwards, F.; Harper-Smith, S.; Jacob, U.; Ledger, M. E.; Martinez, N. D.; Memmott, J.; Mintenbeck, K.; Pinnegar, J. K.; Rall, B. C.; Rayner, T. S.; Reuman, D. C.; Ruess, L.; Ulrich, W.; Williams, R. J.; Woodward, G.; Cohen, J. E., Consumer-resource body-size relationships in natural food webs, Ecology, 87, 2411-2417 (2006) [6] Burnet, B., The Silken Web. A Natural History of Australian Spiders (1994), Reed New Holland Books: Reed New Holland Books Sydney [7] Coddington, J. A.; Levi, H. W., Systematics and evolution of spiders (Araneae), Ann. Rev. Ecol. System, 22, 565-592 (1991) [8] Corcobado, G., Rodríguez-Gironés, M.A., De Mas, E., Moya-Laraño, J., 2010. Introducing the refined gravity hypothesis of extreme sexual size dimorphism. BMC Evol. Biol., in press; Corcobado, G., Rodríguez-Gironés, M.A., De Mas, E., Moya-Laraño, J., 2010. Introducing the refined gravity hypothesis of extreme sexual size dimorphism. BMC Evol. Biol., in press [9] Denny, M., Physical properties of spiders silk and their role in design of orb-webs, J. Exp. Biol., 65, 483-506 (1976) [10] Eberhard, W. G., How spiders initiate airborne lines, J. Arach., 15, 1-9 (1987) [11] Foelix, R. F., Biology of Spiders. (1996), Oxford University Press: Oxford University Press Oxford, UK [12] Gosline, J. M.; Guerette, P. A.; Ortlepp, C. S.; Savage, K. N., The mechanical design of spider silks: from fibroin sequence to mechanical function, J. Exp. Biol., 202, 3295-3303 (1999) [13] Hayashi, C. Y.; Blackledge, T. A.; Lewis, R. V., Molecular and mechanical characterization of aciniform silk: uniformity of iterated sequence modules in a novel member of the spider silk fibroin gene family, Mol. Biol. Evol., 21, 1950-1959 (2004) [14] Kitagawa, M.; Kitayama, T., Mechanical properties of dragline and capture thread for the spider Nephila clavata, J. Mat. Sci., 32, 2005-2012 (1997) [15] Köhler, T.; Vollrath, F., Thread biomechanics in the 2 orb-weaving spiders Araneus diadematus (Araneae, Araneidae) and Uloborus walckenaerius (Araneae, Uloboridae), J. Exp. Zool., 271, 1-17 (1995) [16] Levi, H. W., The Diadematus group of the orb-weaver genus Araneus north of Mexico (Araneae: Araneidae), Bull. Mus. Comp. Zool., 141, 131-179 (1971) [17] Morse, D. H., Predator upon a Flower. Life History and Fitness in a Crab Spider (2007), Harvard University Press: Harvard University Press Cambridge, MA [18] Morse, D. H.; Fritz, R. S., Experimental and observational studies of patch choice at different scales by the crab spider Misumena Vatia, Ecology, 63, 172-182 (1982) [19] Moya-Laraño, J.; Vinkovic, D.; De Mas, E.; Corcobado, G.; Moreno, E., Morphological evolution of spiders predicted by pendulum mechanics, PLoS One, 3, e1841 (2008) [20] Ortlepp, C.; Gosline, J. M., The scaling of safety factor in spider draglines, J. Exp. Biol., 211, 2832-2840 (2008) [21] Osaki, S., Spider silk as mechanical lifeline, Nature, 384, 419 (1996) [22] Osaki, S., Safety coefficient of the mechanical lifeline of spiders, Polym. J., 35, 261-265 (2003) [23] Penney, D., Does the fossil record of spiders track that of their principal prey, the insects?, Trans. R. Soc. Edinb. Earth Sci., 94, 275-281 (2004) [24] Peters, H. M., On the structural and glandular origin of the bridging lines used by spiders for moving to distant places, Acta Zool. Fen., 190, 309-314 (1990) [25] Roesler, J.; Harders, H.; Backer, M., Mechanical Behaviour of Engineering Materials (2007), Springer: Springer Berlin [26] Selden, P. A.; Shear, W. A.; Bonamo, P. M., A spider and other arachnids from the Devonian of New York, and reinterpretations of Devonian Araneae, Palaeontology, 34, 241-281 (1991) [27] Shear, W. A.; Palmer, J. M.; Coddington, J. A.; Bonamo, P. M., A Devonian spinneret—early evidence of spiders and silk use, Science, 246, 479-481 (1989) [28] Swanson, B. O.; Blackledge, T. A.; Summers, A. P.; Hayashi, C. Y., Spider dragline silk: correlated and mosaic evolution in high-performance biological materials, Evolution, 60, 2539-2551 (2006) [29] Vollrath, F.; Selden, P., The role of behavior in the evolution of spiders, silks, and webs, Ann. Rev. Ecol. Evol. Syst., 38, 819-846 (2007) [30] Vollrath, F.; Madsen, B.; Shao, Z. Z., The effect of spinning conditions on the mechanics of a spider’s dragline silk, Proc. R. Soc. Lond. B—Biol. Sci., 268, 2339-2346 (2001) [31] Woodward, G.; Ebenman, B.; Emmerson, M.; Montoya, J. M.; Olesen, J. M.; Valido, A.; Warren, P. H., Body size in ecological networks, Trends Ecol. Evol., 20, 402-409 (2005) This reference list is based on information provided by the publisher or from digital mathematics libraries. 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