STUDIES ON THE EXPLOITATION AND UTILIZATION OF ANIMAL PROTEIN RESOURCES; Apple snail (Am pullaria gigas). Ⅱ. The ecological characters of Apple snail and its comprehensive technology for high yielding culture

This paper reported the life cycle of Apple snail and its ecological characters on egg laying, hatching , growth and dormancy. Based on the characters mentioned, the comprehensive technology for high yielding culture consisting of production arrangement, feed sources, cultural density, water management, periodic distributing and catching in breeding seasons and preserving snail over winter etc. was developed.