Effect of calcium and potassium elements and their mixture on land snail Eobania vermiculata (muller) [electronic resource].

Includes references.

The present study aims to illustrate the role of each of calcium, potassium and their mixture (1:1) on some biological aspects of land snail Eobania vermiculata (Muller). The examined elements were added to snailfood at three selected concentrations (0,5 , 1.0 , 1.5%) and the evaluated biological aspects include incubation period, hatchability rate and reproduction potention . The obtained data revealed that the studied biological aspects were considerably affected and such affects clearly differed according to the type and concentration of the additives. The mixing of the two elements encourage the tested biological aspects comparing with the usage of them separately and the calcium element has the upper hand particularly at its low concentration . Moreover, the low concentration (0.5%) of calcium, potassium and their mixture was the most suitable for the tested biological items (incubation period recorded 19.62, 20.04 and 17.12 days, hatchability rate reached 95.90, 94.54 and 98.10 % and number of eggs/clutch were 111.4, 97.6 and 12j.6 ,respectively) while the high concentrations (1.0 and 1. 5%) resulted in an adverse effect as they drive land snail into shell for several days without feeding.

Summary in Arabic.

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