Influence of substrate humidity on desiccation resistance capacity in Subulina octona (Mollusca, Subulinidae)

Abstract

exposure; 8.55 cm±1.3 and 6.33 cm±2.91, after 24 h; 11.07 cm±4.19 and 7.27 cm±2.7, after 36 h, 9.12 cm±2.15 and 6.47 cm±2.11, after 48 h. Every individual of dry substrate box died whereas every individual of humid substrate box survived. These results showed that substrate humidity was an influent factor regarding desiccation resistance in S. octona.

Contributions of climate and Brassica oleracea cultivar to gastropod abundance and assemblage in southeastern Brazil

“…Further analyses confirmed these trends as humidity and rainfall correlated positively with gastropod abundance, while the opposite occurred for temperature. The survival of terrestrial gastropods is largely dependent upon environment moisture because of their permeable integument, which favours water loss (Dias et al, 2007; Prior, 1985); at the same time, they are able to rehydrate in contact with humid surfaces (Prior, 1985). Thus, molluscs thrive in humid and rainy periods (Douglas & Tooker, 2012), conditions that enhance their survival and reproduction.…”

Population dynamics of Megalobulimus paranaguensis (Gastropoda: Pulmonata) in the southeast coast of Brazil

“…Snails depend on high humidity to have an active life (BAKER 1958), being sensitive to desiccation, which tends to restrict their movements (GETZ 1974). D'AVILA & BESSA (2005) and DIAS et al (2007) showed that substrate moisture is important for growth, reproduction, survival and resistance to desiccation in Subulina octona (Bruguière, 1792). As the evaporation removes moisture from the substrate, it decreases the number of captures, while the high precipitation tends to increase the number of catches by increasing humidity, which influences positively the activity of M. paranaguensis.…”