The effects of temperature and humidity on the nocturnal activity of different shell colour morphs of the land snail Arianta arbustorum

摘要: The noctural activities of the phenotypic shell colour morphy and age classes (adults juveniles) Arianta arbustorum were recorded 1 day week-1 for 4 weeks in several laboratory microclimatic conditions. Six constant temperatures between 3 18dC four levels relative humidities 34 98% maintained. A light regime 16 h light: 8 dark was used. There are highly significant differences activity at different adaptation temperature humidity. interaction these factors is significant. no nocturnal two colours nor classes, but morph humidity also Yellows more active than browns high humidities, less low. They therefore likely to be behaviourally responsive an environment fluctuating humidities. This result discussed relation maintenance polymorphism.