Abstract: Northeastern wood frog, also known as wood frog and snow clam, is a beneficial terrestrial and aquatic amphibian wild animal protected by the country and has important economic and scientific research value and high economic value. Because snow clams have nourishing, anti-aging, immunity-enhancing and other effects, they have become a favorite nourishing product for many people. Therefore, many people want to get rich by cultivating snow clams. So how should snow clams be cultured? Let’s learn about the artificial breeding technology of snow clams together. Artificial breeding methods of snow clams

1. Select breeding frogs

The breeding frogs should be healthy, agile in movement, without deformities and trauma, and should have the characteristics of pure Northeast forest frogs, and the frog should be 2 years old ~4 years. The male weighs 15-25g, and the female weighs 25-45g. Frog eggs naturally produced in the wild can be selected for breeding. Healthy fertilized eggs with dark black eggs, even distribution of eggs, and clear and transparent egg membranes should be selected. The transportation container should be a plastic bucket, iron bucket or impermeable bag. The transportation and storage temperature of frog eggs should be 0 to 10°C, the storage time should not exceed 40 hours, and the ratio of water to frog eggs should be 1:1.

2. Frog egg hatching

The environmental temperature during egg laying should be 7 to 15°C, 20 to 25 pairs/m2 of frogs, and the male to female ratio is 1:1. All eggs should be laid within 3 days. The eggs produced can be placed in the same incubation tank for hatching, so that the hatched tadpoles are uniform in size and easy to raise and manage. The incubation water temperature should be 5 to 20°C, and the water pH should be 5.5 to 7.5. During the incubation period of frog eggs, corresponding measures such as anti-freeze, sun protection, and protection from natural enemies should be taken.

3. Tadpole rearing and management

The living water breeding tank can raise 500 to 600 tadpoles in the early stage of metamorphosis per cubic meter, and the stagnant water breeding tank can raise 200 to 300 tadpoles in the early stage of metamorphosis. During the tadpole breeding period, the water transparency in the tadpole pool should be maintained at 30-50cm, the dissolved oxygen in the water body should be above 5mL/L, and the water temperature should be 15-25°C. The optimal temperature is 15-20°C. The feed should be nutritious and free of mildew. The proportion of animal and plant feed can be adjusted according to the growth and development needs of tadpoles at different stages. Special pellet feed for tadpoles can also be used. Before metamorphosis, tadpoles should have an average body length of 5 to 8 cm, an average weight of 1.4 to 2.0 g, uniform size, and high vitality.

4. Feeding and management of abnormal frogs