Aestivating snail sealed into itsshell by a calcareous layer. Snails aestivate if the temperature is too high (>30 °C) or if the air humidity is too low (< 70-75%) relative humidity.
Snails hibernate if thetemperature drops below 5 °C. For the snail farmer the result is the same: his(or her) snails become inactive and stop growing, losing valuable growing time,while expenses for housing, tending and protection continue.
Consequently, it is in the snail farmer’s interest to prevent or at least reduce dormancy by selecting the most favorable site for the snail farm, by providing good housing for the snails, by providing good feed and ensuring good snail farm management.
Obviously, it is possible tofarm snails in a completely controlled environment but this would requireconsiderable investment costs and is therefore presumably outside the scope ofthe farmers for whom this Agrodok is intended.
Without artificial climatecontrol, successful commercial snail farming is more or less restricted toareas with the following characteristics:
- Temperature: a steady year-round temperature of 25-30 °C, and a low fluctuation between day-time and night-time temperatures.
- Day-length: a fairly constant 12/12-hour photo-period throughout the year.
- Air Humidity: ayear-round relative air humidity of 75-95%.
These conditions correspond to the tropical rain-forest climate zones and they work best when there is no pronounced dry season or strong fluctuations.