Behaviour and metabolism during tonic immobility (death-feigning) in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae)

The antipredator behaviour, tonic immobility (TI) is a valuable defence that enables insects to increase their chance of survival and is a trade-off between fleeing and protection. How the TI strategies of insects respond to environmental factors, however, remains a largely understudied subject. In...

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Autores principales:	Huijuan LI, Junbao WEN
Formato:	article
Lenguaje:	EN
Publicado:	Institute of Entomology, Biology Centre, Czech Academy of Science 2021
Materias:	coleoptera curculionidae eucryptorrhynchus defence strategy anti-predator behaviour thanatosis death-feigning metabolic rate Zoology QL1-991
Acceso en línea:	https://doaj.org/article/2cdc417e8161479dbfddbe43cac5523f
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spelling	oai:doaj.org-article:2cdc417e8161479dbfddbe43cac5523f2021-11-05T15:23:15ZBehaviour and metabolism during tonic immobility (death-feigning) in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae)1210-57591802-882910.14411/eje.2021.033https://doaj.org/article/2cdc417e8161479dbfddbe43cac5523f2021-10-01T00:00:00Zhttps://www.eje.cz/artkey/eje-202101-0033_behaviour_and_metabolism_during_tonic_immobility_death-feigning_in_eucryptorrhynchus_scrobiculatus_and_e_bra.phphttps://doaj.org/toc/1210-5759https://doaj.org/toc/1802-8829The antipredator behaviour, tonic immobility (TI) is a valuable defence that enables insects to increase their chance of survival and is a trade-off between fleeing and protection. How the TI strategies of insects respond to environmental factors, however, remains a largely understudied subject. In this paper the effect of four factors (mechanical stimulation, light, sound and temperature) and metabolic responses were used to evaluate TI behavioural and physiological adaptions in Eucryptorrhynchus scrobiculatus (ESCR) and Eucryptorrhynchus brandti (EBRA). In the behavioural experiment, the metaventrite, which is the stimulus-sensing region in ESCR and EBRA, was subjected to mechanical stimulation. Light lengthened the TI duration in ESCR males, while sound had the opposite effect in ESCR and EBRA. The effect of temperature on the duration of TI was variable: in ESCR, the duration was shorter at low (15°C) and high (32°C) temperatures, but in EBRA, it was longer at the low (15°C) temperature. In the metabolism experiment, ESCR and EBRA metabolic rates (MR), was significantly dependent on whether they were in a state of TI or not. The TIMR declined to 76.90% in ESCR and 71.40% in EBRA. These results indicate that TI in ESCR and EBRA differed under different external conditions and contributes to the understanding of the physiological regulation of ecological traits of insect TI.Huijuan LIJunbao WENInstitute of Entomology, Biology Centre, Czech Academy of Sciencearticlecoleopteracurculionidaeeucryptorrhynchusdefence strategyanti-predator behaviourthanatosisdeath-feigningmetabolic rateZoologyQL1-991ENEuropean Journal of Entomology, Vol 118, Iss 1, Pp 322-329 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coleoptera curculionidae eucryptorrhynchus defence strategy anti-predator behaviour thanatosis death-feigning metabolic rate Zoology QL1-991
spellingShingle	coleoptera curculionidae eucryptorrhynchus defence strategy anti-predator behaviour thanatosis death-feigning metabolic rate Zoology QL1-991 Huijuan LI Junbao WEN Behaviour and metabolism during tonic immobility (death-feigning) in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae)
description	The antipredator behaviour, tonic immobility (TI) is a valuable defence that enables insects to increase their chance of survival and is a trade-off between fleeing and protection. How the TI strategies of insects respond to environmental factors, however, remains a largely understudied subject. In this paper the effect of four factors (mechanical stimulation, light, sound and temperature) and metabolic responses were used to evaluate TI behavioural and physiological adaptions in Eucryptorrhynchus scrobiculatus (ESCR) and Eucryptorrhynchus brandti (EBRA). In the behavioural experiment, the metaventrite, which is the stimulus-sensing region in ESCR and EBRA, was subjected to mechanical stimulation. Light lengthened the TI duration in ESCR males, while sound had the opposite effect in ESCR and EBRA. The effect of temperature on the duration of TI was variable: in ESCR, the duration was shorter at low (15°C) and high (32°C) temperatures, but in EBRA, it was longer at the low (15°C) temperature. In the metabolism experiment, ESCR and EBRA metabolic rates (MR), was significantly dependent on whether they were in a state of TI or not. The TIMR declined to 76.90% in ESCR and 71.40% in EBRA. These results indicate that TI in ESCR and EBRA differed under different external conditions and contributes to the understanding of the physiological regulation of ecological traits of insect TI.
format	article
author	Huijuan LI Junbao WEN
author_facet	Huijuan LI Junbao WEN
author_sort	Huijuan LI
title	Behaviour and metabolism during tonic immobility (death-feigning) in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae)
title_short	Behaviour and metabolism during tonic immobility (death-feigning) in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae)
title_full	Behaviour and metabolism during tonic immobility (death-feigning) in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae)
title_fullStr	Behaviour and metabolism during tonic immobility (death-feigning) in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae)
title_full_unstemmed	Behaviour and metabolism during tonic immobility (death-feigning) in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae)
title_sort	behaviour and metabolism during tonic immobility (death-feigning) in eucryptorrhynchus scrobiculatus and e. brandti (coleoptera: curculionidae)
publisher	Institute of Entomology, Biology Centre, Czech Academy of Science
publishDate	2021
url	https://doaj.org/article/2cdc417e8161479dbfddbe43cac5523f
work_keys_str_mv	AT huijuanli behaviourandmetabolismduringtonicimmobilitydeathfeigningineucryptorrhynchusscrobiculatusandebrandticoleopteracurculionidae AT junbaowen behaviourandmetabolismduringtonicimmobilitydeathfeigningineucryptorrhynchusscrobiculatusandebrandticoleopteracurculionidae
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Behaviour and metabolism during tonic immobility (death-feigning) in Eucryptorrhynchus scrobiculatus and E. brandti (Coleoptera: Curculionidae)

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