Journal
JOURNAL OF INSECT SCIENCE
Volume 8, Issue -, Pages -Publisher
UNIV ARIZONA
DOI: 10.1673/031.008.4401
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Water balance of the terrestrial isopod, Armadillidium vulgare, was investigated during conglobation (rolling-up behavior). Water loss and metabolic rates were measured at 18 +/- 1 degrees C in dry air using flow-through respirometry. Water-loss rates decreased 34.8% when specimens were in their conglobated form, while CO2 release decreased by 37.1%. Water loss was also measured gravimetrically at humidities ranging from 6 to 75% RH. Conglobation was associated with a decrease in water-loss rates up to 53% RH, but no significant differences were observed at higher humidities. Our findings suggest that conglobation behavior may help to conserve water, in addition to its demonstrated role in protection from predation.
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