The main foods of yellow croaker are snails, small fish, shrimp, aquatic insects and its larvae, as well as the roots, stems a
The main foods of yellow croaker are snails, small fish, shrimp, aquatic insects and its larvae, as well as the roots, stems and leaves of aquatic plants. They also eat artificial feed, and their eating habits will change with the change of environment and season. Artificial farming can be fed with fresh animal feed or artificial compound feed. Small fish, shrimp, snail meat, livestock and poultry scraps and other animal baits are ground, and then the ground flour is used as an adhesive, stirred evenly to form a ball, and fed on the bait table.
First, what does the yellow bone fish eat?
1. The main foods of yellow croaker are snails, small fish, shrimps, aquatic insects, larvae, roots, stems and leaves of aquatic plants, and sometimes they eat artificial feed. Its feeding habits will change with the change of environment and season. Different specifications of Pelteobagrus fulvidraco have different feeding habits. The main feeding habits of Pelteobagrus fulvidraco are copepods and cladocera. It is 5-8 cm long and mainly feeds on zooplankton and aquatic insects. More than 8 cm, mainly feeding on mollusks and small fish.
2. In artificial feeding, fresh animal feed or artificial compound feed can be used for feeding. For example, animal feed such as small fish, shrimp, snail meat, livestock and poultry leftovers can be ground, then bonded with soil powder, stirred evenly into balls, fed on the bait table, or fed with special compound feed. When feeding, we must be regular, fixed, qualitative and quantitative. The daily feeding amount should be about 5% of the fish weight, and it should be fed twice a day, accounting for 1/3 in the morning and 2/3 in the afternoon.
3. Yellow croaker usually lurks in the bottom of the water or in crevices during the day, comes out for activities and foraging at night, and gathers in deep water in winter. Pseudosciaena crocea has strong adaptability and can survive in harsh environment for 5-6 hours without drinking water. Pseudosciaena crocea is resistant to hypoxia, and can survive normally when dissolved oxygen is above 2mg/L. When dissolved oxygen is below 2 mg/L, its head will float, and when dissolved oxygen is 1 mg/L, it will suffocate and die ... Pseudosciaena crocea is a small fish with slow growth. It has the habit of breeding in groups under natural conditions. Generally, from mid-May to mid-July, it breeds in the water area with shallow water level, hard bottom, certain beach foot, high transparency, slow water flow and rich bait, which is suitable for nesting and hatching.
Second, the cultivation method of yellow croaker
1, fish pond conditions
(1) Pseudosciaena crocea can grow in a common pond, and there is no need to build a special pond. The area of the pond can be determined according to the number and density of aquaculture. The water depth of the aquaculture pond must be about 1- 1.5 meters, and the silt at the bottom of the pond should not be too thick, and it is best to mix it with sand.
(2) The aquaculture pond should have irrigation ports and drainage ports, and the bad conditions can be ignored.
(3) There must be enough water in the pond. Before stocking, the culture pond should be thoroughly cleaned, and some quicklime can be sprinkled in the pond, which is convenient for eliminating harmful microorganisms and beneficial to the growth of fry.
2, fried stockings
The stocking time of fry is generally from the end of May to the middle of June, and fry must be chosen to be harmless to fish and swim fast. When releasing fish, put it into the pond slowly to avoid hurting the fish. 65,438+0 mu of pond water can cultivate about 65,438+04-65,438+06,000 fish fry.
3. Breeding management
(1) feed
① Zooplankton is the main food of fry in the early stage of culture. After 7 days of cultivation, when the natural bait in the pond is not enough, farmers can start feeding.
② There are many baits, such as fresh shrimp, small miscellaneous fish, snail meat, fish meal, etc. , need to feed twice a day, morning and evening 1 time. Feed more at night than in the morning, so that fry can grow faster.
(3) When the fish grow to more than 5 cm, you can feed them some compound feed, which can improve the growth speed of the fish.
(2) check
① Check the fish pond 1 time every morning and evening to observe the feeding situation of fry and understand the water quality. If there is any extra bait in the pond, it must be removed immediately. If it is found that the transparency of water is too low or polluted, it is necessary to change the water in time.
② The pond can be disinfected with quicklime every 15 days, which can reduce the chance of yellow croaker getting sick.
(3) Overwintering
When the pond is not frozen, we must get ready for winter. After winter, the temperature of the pool water drops to 10? When the temperature is lower than C, you can apply some quicklime in the pond. Be sure to sweep 1 the snow around the pond after it snows.
4. Disease prevention and treatment
(1) gill rot
Symptoms: After suffering from this disease, the fish head will turn black, and there will be some mucus on the gills, and finally the gills will rot directly.
② Prevention: In the early stage of illness, you can sprinkle some bleaching powder where fish often eat, which can prevent it. In the late stage of the disease, you must spread bleach all over the pond.
(2) Enteritis
Symptoms: The sick fish will have swollen abdomen and swollen anus. When the fish's abdomen is gently pressed, there will be yellow liquid flowing out of the anus.
② Prevention: The pond must be thoroughly disinfected 1 time. Don't feed moldy bait when feeding. If you feed live bait, be sure to disinfect it with salt before feeding it.
(3) Wheel diseases
Symptoms: The disease usually occurs in late spring and early autumn. In severe cases, sick fish will swim around in the pond.
② Prevention: The whole pond can be sprayed with 0.7 mg/1 L ferrous sulfate mixture to eliminate rotifers.