Helisoma duryI for the biological control of biomphalaria Alexandrina under laboratory conditions I] biological competitive interactions

ABSTRACT

In the present laboratory study information was obtained concerning the interspecific competition between H. Duryi and B. Alexandrina snails. The results indicated that the mortality rate among the adult B. Alexandrina snails was significantly increased. In addition the hatching of the egg masses and further development of the juveniles of the target snails were highly influenced by both the presence of Helisoma snails themselves and by the water conditioned by them