Daily activity of Arion lusitanicus Mabille, 1868 (Gastropoda; Pulmonata; Arionidae)
2001
Kozlowski, J. (Institute of Plant Protection, Poznan (Poland))
Studies were conducted under field and laboratory conditions. Two main phases - the activity phase and the phase of resting - have been distinguished in the daily cycle of the slug. The observed activity was of different types, such as crawlling, feeding and the state of semiactivity. It has been found that slug activity is determined by various atmospheric factors, mainly by light intensity, rainfalls and presence of dew. Slug activity is strongly influenced by their physiological 24 h life rhythm. Full activity was exhibited by all individuals after sunset and after the appearance of dew. They return to their shelters about three hours after sunrise
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