Biomechanical analysis of prey capture in the carnivorous Southern bladderwort (Utricularia australis)

Scientific Reports
Simon PoppingaThomas Speck

Abstract

We recorded capture events (CEs) of the daphniid Ceriodaphnia dubia by the carnivorous Southern bladderwort with suction traps (Utricularia australis). Independent to orientation and behavior during trap triggering, the animals were successfully captured within 9 ms on average and sucked in with velocities of up to 4 m/s and accelerations of up to 2800 g. Phases of very high acceleration during onsets of suction were immediately followed by phases of similarly high deceleration (max.: -1900 g) inside the bladders, leading to immobilization of the prey which then dies. We found that traps perform a 'forward strike' during suction and that almost completely air-filled traps are still able to perform suction. The trigger hairs on the trapdoors can undergo strong bending deformation, which we interpret to be a safety feature to prevent fracture. Our results highlight the elaborate nature of the Utricularia suction traps which are functionally resilient and leave prey animals virtually no chance to escape.

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Citations

Apr 18, 2018·Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology]·Felipe Rezende LimaWelington Luiz Araújo
May 22, 2019·Journal of Experimental Botany·Richard J Morris, Mark Blyth
Sep 25, 2017·Scientific Reports·Anna Sofia WestermeierSimon Poppinga
Apr 20, 2019·Frontiers in Plant Science·Bartosz J PłachnoPiotr Stolarczyk
Sep 24, 2019·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Otto BergUlrike K Müller
Jun 9, 2020·The New Phytologist·Ulrike K MüllerJohan L van Leeuwen
Jul 14, 2020·Integrative and Comparative Biology·Stephen M DebanUlrike K Müller
Feb 14, 2021·Applied Microscopy·Ki Woo Kim
Feb 3, 2021·Nature Materials·Yongjin KimAlfred J Crosby
Feb 26, 2020·Current Biology : CB·Christopher Whitewoods
May 27, 2021·Proceedings. Biological Sciences·Ulrike BauerSimon Poppinga

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