A mixture of 360 Class I, 240 Class

A mixture of 360 Class I,
240 Class II, 120 Class III and 60 Class IV snails were
released in each plot in Jun. 2006. The number of GAS
consumed by P. sinensis was counted by subtracting the
remaining GAS from the initial number placed in the
plots 15 days later.
Experimental trials were conducted in Z. latifo