Survey and population density of land snails under different conditions at Qalubia and Sharkia governorates

الملخص EN

The aim ofthis research isstudy the survey and effect soil components on population density and distribution of land snails in Kafr Al-Gammal and Kafer Hamza villages(QalubiaGovernorate), and Sunhot and Adleyavillages (SharkiaGovernorate).

Survey studies revealed that four species of land snails, Monachacartusiana, Eobainavermiculata, Succineaputris and Cochlicellaacutawere found in the two governorates.

All species were found in Adleya andKafr Al- Gammal villages, while the two species, M.

cartusiana and S.

Putris, were found in KafrHamzavillage, whereas, M.

cartusianaonly was found in Sunhot village.

These findings indicated that the population density of land snails differed from one locality to another.

The highest population was recorded in Adleyavillage, whileM.

cartusiana was the most predominant species.

On the other hand, soil analysis showed that the population density of land snails were high in loam soil, especially M.

cartusiana, followed by sandy loam but the population density of E.

vermiculata was high in sandy loam.

In additionthe low population density of land snails was in silty loam.

On the other hand, the chemical analysis of soil showed that the number of snails increased with the increase of calcium, while decreased with high values of pH and EC (Electrical conductivity) in soil.