Estivation in land snails

Rees and Hand [36] utilized simultaneous respirometry and calorimetry to measure energy flow in snails before and during a short period of estivation. Within four days following entry into estivation, heat dissipation and oxygen 

Heat dissipation, respiration, and respiratory exhange ratios (R) for nonestivating and estivating Oreohelix spp. [after 36] 

A correlate of the reduced respiration rates is a decrease in evaporative water loss [127], There is a close relationship between the extent reduction in respiration for a given snail species and its capacity to tolerate desiccating environments [36]. Remarkably, after seven months of estivation, the percent tissue water in Oreohelix had not change significantly, although total water declined in parallel with body dry mass [129]. 

---