Novel case of a tenebrionid beetle using discontinuous gas exchange cycle when dehydrated期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Novel case of a tenebrionid beetle using discontinuous gas exchange cycle when dehydrated

Authors:	Frances D Duncan Boris Krasnov† Megan McMaster‡

Institution:	Department of Physiology, Faculty of Health Sciences, University of the Witwatersrand, South Africa,;Ramon Science Center, Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Israel,;School of Botany and Zoology, University of Natal, South Africa

Abstract:	Abstract In this study we show a link between the respiratory method and state of hydration in an arid dwelling tenebrionid beetle ( Pimelia grandis ). Dehydrated beetles use discontinuous gas exchange cycles with a flutter period consisting of several discrete bursts of CO₂ release, whereas beetles given access to food and water showed a form of continuous CO₂ release. These data give support to the respiratory water conservation hypothesis for the discontinuous gas exchange cycle.

Keywords:	Discontinuous gas exchange Pimelia grandis tenebrionid water loss