Materials and Methods

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ECOLOGICAL STUDY ON TERRESTRIAL SNAILS IN ASSIUT, EGYPT. ... ornamental farm of Assiut University was higher than in other sites. Multiple regression ...
ECOLOGICAL STUDY ON TERRESTRIAL SNAILS IN ASSIUT, EGYPT. Remondah R. Ramzy; Nasser A. El-Shimy; Ahmed H. Obuid-Allah and Turkey A. Radwan, Department of Zoology, Faculty of Science, Assiut University, Assiut, Egypt.

ABSTRACT Four snail species (Oxyloma elegans, Monacha obstructa, Eobania vermiculata and Theba pisana) were found in the main four investigated sites. These sites varied in the number of species as well as in number of specimens depending on the habitat and the season of collection. The abundance of snails at an ornamental farm of Assiut University was higher than in other sites. Multiple regression analysis indicated that the interaction of ecological factors has highly significant effects on the abundance of this species. Stepwise multiple regression was applied to select a model equation which all variables are significant and an adequately describes the changes in the abundance of snail species. The model equations of these regressions were calculated.

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