A Detailed Guide to Artificial Breeding Techniques for Golden Apple Snail Farming

The golden apple snail is native to the Amazon River basin in South America and was introduced to China in 1981. Its meat is tender and delicious, containing abundant protein, carotene, various vitamins and minerals, making it a delicacy on the dining table. Because of its low fat content, it is a high-quality tonic for patients with high blood pressure and coronary heart disease. In addition, it also serves as feed for some precious aquatic animals. The golden apple snail is large in size, broad in feeding habits, highly adaptable, fast in growth and reproduction, and high in yield, and is farmed in all parts of China.

1. Male and Female Identification

There is little difference in appearance between male and female snails, and it is difficult to distinguish them at the juvenile stage. The most obvious difference in adult snails is: under the same rearing conditions, among snails of the same age, females are generally larger than males; the center of the operculum of the female snail is concave, while the center of the operculum of the male snail is convex with a slightly concave surrounding area.

2. Selection and Cultivation of Parent Snails

Parent snails should be selected from individuals over 4 months old, large in size, with intact and undamaged shells, and healthy, with a male-to-female ratio of 2-4:1. The parent snail cultivation pond (which also serves as a spawning pond) can be an earthen pond, cement pond, ditch, etc. The area should not be too large, and a rectangular shape is preferable, with a water depth of 30-50 cm. Wooden sticks and bamboo strips are inserted around and in the center of the pond for female snails to attach to and lay eggs. Earthen ponds should have escape-prevention facilities around the perimeter. A stocking density of about 30 snails per sq m is suitable. In addition to feeding sufficient green feed every day, concentrated feed should also be artificially supplied, with a daily feeding amount of 0.5% of the total body weight of the snails. During the cultivation period, ensure fresh water quality and a quiet environment.

3. Egg Collection and Hatching

From March to November each year, male and female snails mate and lay eggs. The egg clusters laid should be collected promptly and hatched in a separate pond. The timing of egg collection should not be too early, as the egg clusters are too soft and not easy to peel off as a whole; nor should it be too late, as the egg clusters will have completely dried out and the eggs are easily broken when peeling. Generally, 10-20 hours after spawning, when the egg clusters have not completely hardened, is the ideal time for collection. Place the collected egg clusters on a mesh sheet or bamboo sieve, cover with a layer of gauze, and place above a water basin indoors for hatching. They can also be set up 30-50 cm above the juvenile snail cultivation pond for hatching, taking care to provide shade and shelter from rain. At a temperature of 28-30°C, hatching takes 7-10 days. When the red eggs become pale and turn white, the juvenile snails break out of the membrane and fall into the water. After 2 days, when the apex of the juvenile snail's shell changes from red to black, they begin to feed.