The Transpiration of Terrestrial Isopods
Open Access
- 1 June 1955
- journal article
- Published by The Company of Biologists in Journal of Experimental Biology
- Vol. 32 (2), 238-255
- https://doi.org/10.1242/jeb.32.2.238
Abstract
1. The transpiration of three species of Isopoda has been investigated; Armadillidium shows the highest resistance to desiccation, Oniscus the least, and Porcellio is intermediate. 2. The permeability of isopod cuticle is limited by lipoids which impregnate the endocuticle. If the temperature is raised above the lipoid melting-point a marked increase in permeability results. 3. Isopods show a characteristic decline in transpiration rate during exposure to desiccating atmospheres. The high initial rate of evaporation is due mainly to loss of water from layers of the cuticle external to the lipoid barrier. 4. There is a progressive decrease in the permeability of the integument during desiccation. This is brought about by a shrinkage of the cuticle, which leads to a closer packing of lipoid molecules. The mechanism of this structural alteration is based on an interaction between endocuticular proteins and the ionic constituents of body fluids; in the course of desiccation the blood concentration increases and there is a corresponding decrease in the dispersion of endocuticular elements.This publication has 18 references indexed in Scilit:
- ‘Weber's Glands’ and Respiration in WoodliceNature, 1950
- Evaporation of Water from WoodliceNature, 1949
- THE INSECT CUTICLEBiological Reviews, 1948
- The Penetration of Insect Egg-shellsBulletin of Entomological Research, 1948
- Asymmetrical behaviour of insect cuticle in relation to water permeabilityDiscussions of the Faraday Society, 1948
- Permeability and Properties of the Membranes Surrounding the Developing Egg Of Homarus VulgarisJournal of the Marine Biological Association of the United Kingdom, 1946
- Permeability of Adsorbing SubstancesNature, 1944
- Adsorption of Water Vapor by Proteins1Journal of the American Chemical Society, 1944
- OBSERVATIONS ON THE PERMEABILITY OF HYGROSCOPIC MATERIALS TO WATER VAPOUR: I. OBSERVATIONS AT RELATIVE HUMIDITIES LESS THAN 75%Canadian Journal of Research, 1940
- The Measurement and Control of HumidityBulletin of Entomological Research, 1934