Efficient breeding technology of frogs

Frogs are protected animals prohibited by the state, such as pheasants and toads. They have delicate meat, low fat, low sugar and high protein content. At the same time, they are known as "farmland guardians". Carrying out frog farming can not only meet people's consumption needs, but also promote the recovery of natural wild resources. let's take a look at the efficient breeding techniques of frogs.

The growth process of frogs

1. Frog eggs: the breeding time of frogs is about the middle to late April every year. In the process of reproduction, the female frogs hold each other, the female frogs ovulate, and at the same time, the male frogs ovulate, and the sperm and eggs are fertilized in the water, which avoids the time difference and greatly improves the fertilization rate.

2. Tadpoles: tadpoles are a primary stage of the ontogeny of amphibians. The early tadpoles are round or oval in shape and resemble fish in shape. They are nourished by the remaining yolk in the body. When the tadpoles mature, they begin to degenerate and gradually grow limbs.

3. Young frogs: tadpoles grow limbs after abnormal development, and their tails are absorbed and live ashore. Due to changes in physiology and environment, their vitality is very weak and their ability to adapt to the environment is poor, such as dry environment, hot sun exposure, heavy rain and so on.

4. Adult frogs: after a series of growth, young frogs grow into frogs, and their bare skin can not effectively prevent the evaporation of water in the body, so they can not live without water or humid environment for life, and are afraid of drought and cold, so most of them live in tropical and temperate rainy areas.

Culture conditions of frogs

1. Temperature: the suitable temperature for frog growth is 20: 30 ℃. When the temperature is below 10 ℃, the feeding and activity gradually weaken, when the temperature is below 5 ℃, the hibernation begins. When the water temperature exceeds 32 ℃, the activity weakens obviously. When the temperature exceeds 35 ℃, the frog will die one after another.

2. Humidity: frog skin does not protect the tissue structure of water evaporation in the body, so it is obviously not enough to rely on the mucus secreted by the skin glands to maintain the humidity of the body surface, so the habitat environment needs not only a pond of water, but also a weedy, warm and humid environment.

3. Illumination: frogs go out day and night, afraid of direct sunlight, but tend to be weak. Light can promote the metabolism, growth and reproduction of frogs. For example, if they live in the dark for a long time, their gonads are difficult to develop and mature, and even stop spawning and ovulation.

4. Water quality: frog tadpoles require a high amount of dissolved oxygen in frog pond waters, which generally meets the fishery water quality standards. Adult frogs and young frogs breathe with lungs, but the high dissolved oxygen in the water still has a good effect on them. PH is suitable at 7: 8, and the general salinity is not higher than 2.

Construction of Frog Culture Pond

1. Frog planting pond: the area of the frog pond is generally 410 square meters, with a height of 0.8m, a water depth of 0.1m and 0.15m, a ratio of water to land area of 3 ∶ 1, and a perched stone cave, with large pebbles at the bottom of the pond and a humidity of 80%.

2. Incubator: the incubator has an area of 1 square meter, a height of 0.5m, a water depth of 15cm and 20cm, fresh water, pH6~8 and plenty of oxygen, or a large oval washbasin.

3. Tadpole pond: the area of tadpole pond is 30.8 square meters, the height of tadpole pond is 0.8m, the depth of water is 310cm, pH6~7, the ratio of water to land is 2 ∶ 1, and it is better to raise tadpoles of the same specification in each pond.

4. Baby frog pond: the area of the young frog pond is 46.6 square meters, the height of the pond is 0.8m, the water depth is generally 1015cm, the ratio of water to land is 2 ∶ 1, the pond is laid with pebbles of 3cm and 5cm, and the water quality is good, and the pH value is 67.5cm.

Breeding techniques of Frog

1. Frog selection: breed frogs should choose strong, disability-free and disease-free ones for seeding. Usually, the female frog is larger than the male frog, and the external vocal sac on both sides of the neck of the male frog expands when he cries.

2. Breeder frog stocking: breeder frogs are released from September to October with a density of 10: 12 per square meter, with a female-to-male ratio of 1:1. Breeder frogs begin to hold pairs to lay eggs before and after Ching Ming Festival hibernates in frog ponds.

3. Cuddle to spawn: breeder frogs begin to cuddle freely when the average temperature reaches 16-20 ℃. After 3-4 days, they will lay eggs, usually at 5: 6 a.m. and 11:00 to 1: 00 p.m.

4. Egg block harvesting: the frog fertilized eggs are collected and put into the sterilized aquaculture pond to hatch. The darker side of the egg block is the animal pole, which must be upward, and the white side is the plant pole, which must be downward.