Abstract
Abstract 1. 1. The effects of various combinations of photoperiod (LD: 16L-8D; SD: 8L-16D) and temperatures (8 and 20°C) on the glycogen content of the anterior mantle region, which contains large numbers of glycogen storage cells, and of the head-foot muscles of the freshwater pulmonate snail Lymnaea stagnalis were investigated. 2. 2. At 20°C, but not at 8°C, SD photoperiods favour accumulation of glycogen in both tissues. In contrast, LD photoperiods, at 20°C, induce depletion of the glycogen reserves. 3. 3. The changes of the glycogen contents presumably result from a reorientated metabolism linked to photoperiodically induced changes of ovipository activity, as is discussed.
Published Version
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