Wintering Techniques for Common Special Aquaculture Species

1. Childishness

Incubation at the time of childbirth, the following measures can be taken: First, artificial inducing means to enable parents to lay eggs early hatching, increase the time of the juvenile culture, so that the weight before the winter to reach more than 10 grams, and the second is to implement the greenhouse winter, The room temperature was kept at about 25°C, so that the juveniles continued to ingest food during wintering.

2, young bullfrog

After the frost falls, the bullfrog begins to hibernate when the temperature and water temperature drop below 10°C. Less than 10 grams of young bullfrogs have less vitality because of less nutrient accumulation. If the wintering method is improper, it can easily cause a large number of deaths. Here are two simple and safe wintering methods introduced:

One is indoor wintering.

(1) Choose several large plastic basins or tubs and place them indoors in a quiet place. Pots of 5 cm thick soil were placed in the basin, and then water was added to make the water 2 cm higher than the soil surface.

(2) The young bull frogs that began to hibernate were placed in pots at a density of 500/m2. Pots are covered with screens or nylon nets to prevent them from escaping or being attacked by enemies.

(3) Change the water every half month to one month depending on the water quality. During the wintering of young bullfrogs, do not disturb it to reduce its nutrient consumption. When the basin is icing, the ice in the basin should be gently broken so that it does not seal ice.

The second is the outdoor wintering law.

(1) Choose a leeward sunny place, a place convenient for irrigation and drainage as a place for wintering. Excavation of a rectangular wintering pond, specifications are: depth 0.2-0.3 meters, width 1.5 meters, and its length is determined according to needs. The east-west direction is better, and the bottom of the pool requires leveling.

(2) Put 2cm thick silt in the pool, and then evenly implant the appropriate amount of water, and fill the pool with water, so that the water surface is about 2cm higher than the soil. Keep 2 cm water depth throughout the winter.

(3) The young bull frogs were moved to the wintering pond at a density of 200 birds per square meter, and semi-circular scaffolds were made of bamboo in the rectangular shape of the pool, covered with plastic film and straw curtains. During the winter, when the temperature is above 6°C, the membrane should be partially opened in order to ventilate and regulate the temperature. If the temperature is too high, bullfrogs will not be able to fully enter hibernation, which will affect normal wintering. At the same time, attention should also be paid to preventing natural enemies of bullfrogs such as cats and rats.

3, Yuzhu Yu

When the water temperature drops to 1O°C, the earthworms should sink to about 1m under the water. At 8°C, the Yuzhuyu begins to enter a dormant state. The movement of opening shells is significantly reduced, the water filtration rate and the water absorption rate are reduced, and only the water flow is consumed. Small amount of food. Do not apply fertilizer during the winter to avoid deterioration of water quality. If the frozen surface of the ice does not change for a long time, it is necessary to timely break the ice and breathe. When fishing in a pearl-cultivating pond in the winter, it is necessary to sink the cocoon to the bottom of the pool first, which can ensure that there is stagnant water in the cocoon of the cocoon after drainage to facilitate normal breathing.

4, Huang Hao

When the temperature is lower than 15 °C, they will not eat and rely on micro-breathing for hibernation. Before the wintering of the astragalus, a clear pond should be captured and a vigorous disease that swims more than one year should be selected. The swimmer should move quickly. The body should look like a golden yellow, brown and female body with a body length of 20-50 centimeters. Breeding seedlings with a length of more than 40 cm should be used as breeding seedlings, and the ratio of male to female should be 2:1. Generally, wintering leaves 25 g/tail, golden yellow on the back and brown seedlings on the back, with a density of 50-65 bar/m2. The selected eel should pay attention to overwintering management. There are two methods. One is to bring water over the winter, that is, to put 50-70 centimeters of water in a pond with a water source, and put a small amount of plants on the surface of the water to prevent the icy water surface from freezing. Insulation layer; the second is the winter of drainage, that is, in the beginning of hibernation, first put the water in the pool dry, but to keep the pool soil moist, avoid dry. Then cover with a plastic net to prevent birds, rodents, cats and other preying on the seedlings of jaundice. It should be noted that there is still weak breathing during the hibernation period, so it is not appropriate to accumulate heavy objects in the pool, nor can people or large animals move around in the pool.

5, muddy

The hibernation can be achieved when the water temperature drops to 10°C. At that time, the youngsters who have not yet reached the market specification will be concentrated and choose to keep their winters in the earth pool that is strong in leeward water. The cement pool is to be laid with 20 cm thick silt at the bottom of the pool to facilitate the wintering of the mud. Pool water should maintain 1-1.5 meters. In the four corners of the pond, some organic fertilizers such as pigs and cow dung are piled up, which can both fertilize the water and release heat from the fermentation to increase the water temperature.

6. The bearded beard is a tropical fish species. It is warm and afraid of freezing. When the water temperature is lower than 8°C, it will die. In order to make the goatfish species safe for winter, it must:

(1) Choose the fish species. The disease-free, non-invasive 0.3-0.5 kilogram fish of the current year is a species of overwintering fish, which is sick, traumatic, and has a high mortality rate for individuals who are too young to safely survive the winter.

(2) Feeding pools. If there are several culture ponds, after catching the fish, the wintering fish species will be pooled into one pool for feeding and keeping them warm.

(3) Keep the water temperature. The depth of the pool should be more than 1.5 meters and the pool water temperature should be 10-15°C. In wintering pools with residual hot water, hot spring water or hot water can be introduced into the pool; if there is no such condition, a plastic shed can be used for insulation in the wintering pond, and the waterproof surface can be frozen.

(4) Fresh water. The reasonable stocking density of fish species in wintering ponds is 4-6 kg/3, with high density and turbid water quality. Always change the water and keep the pool fresh and non-toxic. (5) Appropriate feeding. When the water temperature in the wintering pond is above 20°C, it is advisable to feed 6.6 kg of animal diet with 100 kg of fish per day, and feed it twice in early and late. If the water temperature is below 15%, the amount of feeding will be appropriately reduced.

7, river crab

When the temperature of the water drops below 10%, the crabs rarely eat or feed. They crouch in the pool or in the bottom of the pool. They are dormant or semi-dormant and have little activity. In order to ensure safe wintering of crabs and increase the survival rate of overwintering, the following measures must be taken.

(1) Grasp the feeding of crabs before winter. In the long winter, the crabs are often unable to resist the death from freezing and disease. Therefore, we must pay close attention to the strengthening of the crab before the winter, appropriate increase in animal feed rich in fat, protein, feeding and feed well, insist on feeding until the crabs stop eating.

(2) Maintain suitable water depth. The depth of the wintering pond should be maintained at about 1.5 meters to prevent crab frostbite or freezing to death. Always check if there is any leakage in the overwintering pool. Do not allow the crab pond to dry up. If the crab is hidden in a cave or mud, it will cause frostbite or even death due to loss of deep water insulation.

(3) Strengthen daily management. The daily management must be specially responsible, adhere to the morning and evening patrol ponds, pay attention to weather and water quality changes, and keep the water fresh. It is forbidden to use ramie and pesticides in the wintering pool to prevent water pollution. Wherever conditions are available, crabs of different sizes and constitutions can be maintained in separate pools. When freezing the surface of the pond, it is necessary to break the icing in time and minimize the disturbance to the crab when breaking the ice so as not to consume physical energy. In the spring of the following year, when the temperature of the water reaches around 1O°C, it can properly feed cooked and easily digestible feeds such as cooked wheat grains and corn.

Matcha Green Tea

Matcha Kit,Matcha Green Tea,Matcha Green Tea Powder,Organic Matcha Green Tea Powder