The spiders of Theridiidae's family display a peculiar behaviour when they hunt extremely large prey. They lift the quarry, making it unable to escape, by attaching pre-tensioned silk threads to it. In this work, we analysed for the first time in the laboratory the lifting hunting mechanism and, in order to quantify the phenomenon, we applied the lifting mechanics theory. The comparison between the experiments and the theory suggests that, during the process, spiders do not stretch the silk too much by keeping it in the linear elastic regime. We thus report here further evidence for the strong role of silk in spiders' evolution, especially how spiders can stretch and use it as an external tool to overcome their muscles' limits and capture prey with large mass, e.g. 50 times the spider's mass.

How spiders hunt heavy prey: The tangle web as a pulley and spider's lifting mechanics observed and quantified in the laboratory / Greco, G.; Pugno, N. M.. - In: JOURNAL OF THE ROYAL SOCIETY INTERFACE. - ISSN 1742-5689. - 18:175(2021), pp. 20200907.1-20200907.9. [10.1098/rsif.2020.0907]

How spiders hunt heavy prey: The tangle web as a pulley and spider's lifting mechanics observed and quantified in the laboratory

Greco G.;Pugno N. M.
2021-01-01

Abstract

The spiders of Theridiidae's family display a peculiar behaviour when they hunt extremely large prey. They lift the quarry, making it unable to escape, by attaching pre-tensioned silk threads to it. In this work, we analysed for the first time in the laboratory the lifting hunting mechanism and, in order to quantify the phenomenon, we applied the lifting mechanics theory. The comparison between the experiments and the theory suggests that, during the process, spiders do not stretch the silk too much by keeping it in the linear elastic regime. We thus report here further evidence for the strong role of silk in spiders' evolution, especially how spiders can stretch and use it as an external tool to overcome their muscles' limits and capture prey with large mass, e.g. 50 times the spider's mass.
2021
175
Greco, G.; Pugno, N. M.
How spiders hunt heavy prey: The tangle web as a pulley and spider's lifting mechanics observed and quantified in the laboratory / Greco, G.; Pugno, N. M.. - In: JOURNAL OF THE ROYAL SOCIETY INTERFACE. - ISSN 1742-5689. - 18:175(2021), pp. 20200907.1-20200907.9. [10.1098/rsif.2020.0907]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/302357
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