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During laboratory studies on the reproductive biology of Vallonia pulchella and V. costata we observed an unusual behaviour in adults and juveniles of both species. The snails moved with their heads and radulae over the egg surface as if feeding. The examination of the egg shell revealed the presence of the fungus Arthrobotrys oligospora, which commonly occurs in the soil and has multiple lifestyles:...
The molluscicidal activity of six monoterpenes and two phenylpropenes against Theba pisana adults was evaluated using fumigation and direct contact methods. In the fumigant toxicity assay, (-)-citronellal showed the highest toxicity with LC50 value of 7.79 µl · l−1 air after 24 h of treatment, followed by (-)-terpinen-4-ol (LC50 = 12.06 µl · l−1), (-)-menthone (LC50 = 12.28 µl · l−1 air) and p-cymene...
Trochulus striolatus is a land snail showing great morphometric variation in its shell, which is the basis for recognition of its subspecies. However, this variability can result from an influence of environment. To verify the possible effect of bioclimatic and spatial variables on the shell size and shape, we studied many samples collected from four biotic zones (lowland, submontane, montane and...
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