CATDOLL : CATDOLL: How to treat yellow catfish red head disease

How to treat yellow catfish red head disease

The prevention and control measures for yellow catfish red head disease are mainly to change water regularly, use microecological preparations such as Yishuibao and Chlorella species to regulate water quality, and insist on running the aerator to increase the dissolved oxygen content in the water; in the epidemic season, regularly use Yufeng iodine (500 ml/bottle) to disinfect the water, disinfect once every 15 days, and use the medicine for 2 consecutive days each time. The dosage is 2 mu/bottle. After using water disinfectants, microecological preparations should also be added appropriately to maintain a sufficient content of beneficial bacteria in the water. Source: Internet

How to breed yellow thorn fish

1. Pond conditions: The pond area for breeding yellow catfish is not strict and can be large or small, but the water depth should be kept above 1.5 meters. The silt at the bottom of the pond should not be too thick, and a muddy bottom is preferred. The pond requires convenient drainage and irrigation, and sufficient water. Before the fish are put into the pond, the pond should be disinfected with quicklime. 75-90 kg of quicklime is used per mu of pond to completely remove wild fish and kill pathogens.

2. Pond breeding: The pond breeding mainly uses yellow catfish. The best size of fish is 10-15 cm and the weight is about 15-35 grams. About 2,500-5,000 fish are placed per mu, and 100 silver carp and bighead carp are raised to control water quality. The daily feeding amount of bait is about 1%-4% of the fish weight for full-price compound feed and about 10% of the weight for small fish and shrimp. Artificial compound feed can be prepared according to the following formula: 30%-40% fish meal, 10%-35% vegetable cake, 20%-30% bean cake, 15%-18% second flour, 10%-15% rice bran, and 2%-5% attractant and growth-promoting additives. Since yellow catfish is an omnivorous fish that mainly feeds on meat, the protein content and quality of the feed are required to be high, otherwise it will affect the normal growth of yellow catfish. For the tamed artificial seedlings, artificial feed can be directly fed, while the natural seedlings need to be tamed for about a week before they can normally eat the working feed. Taming method: first sprinkle the fish paste along the edge of the pond, and after 1-2 days, when the fish begin to come to eat, gradually add artificial bait into the fish paste and throw it at the waterside at a fixed point, and finally switch to all artificial feed for fixed-point, regular, and quantitative feeding.

3. Mixed culture: Yellow catfish can be cultured in other fish ponds. Some wild fish and shrimp in the pond can be used. No separate feed is needed for the yellow catfish. 50-100 fish of about 35 grams are placed per mu, and 10-15 kg of commercial yellow catfish can be obtained. The stocking size of the yellow catfish should not be too small, and other ferocious carnivorous fish, such as catfish and snakehead, should not be raised in the pond.

4. Water quality management: Yellow catfish are less tolerant to hypoxia than conventional fish and prefer clean water. Therefore, the water transparency of the pond for breeding yellow catfish should be maintained at 35-40 cm. Ponds with high stocking density should be equipped with aerators to prevent hypoxia and floating heads. New water should be added regularly. The water in the yellow catfish pond should not be too alkaline, and the amount of quicklime used for disease prevention should not exceed 20 grams per cubic meter.

5. Fish disease prevention and control: Yellow catfish has strong disease resistance and generally does not have serious diseases during breeding. However, during breeding, it is affected by the season, temperature, water quality, feeding, the scaleless characteristics of the fish body, bacteria and parasites in the breeding pond, etc., which may cause local infection and parasites to grow in the gills and internal organs of the fish, causing diseases. It is necessary to pay attention to observation during normal breeding and take precautions in advance for abnormal conditions.

Yellow thorn fish, also known as yellow bone fish, yellow ang, yellow tooth fish, ang ci fish, is called yellow duck call in Hunan and has become a famous Hunan dish. It is a wild fish with yellow body and mucus. There is a thorn on the dorsal fin and pelvic fin, a total of 3 thorns. It is a kind of yellow catfish. There is a single thorn on the back, which is easy to prick the hand and has a paralyzing effect, irritating the skin and causing unbearable pain.

The yellow stickleback is small, with a maximum length of about 15-20 cm (6 inches). Some live in freshwater; some live in marine water; and some live in both freshwater and marine water. It is characterized by a row of spines on its back in front of the dorsal fin. Each pelvic fin has a sharp spine; the caudal peduncle is slender and the caudal fin is square. It has no scales, but has an indefinite number of hard plates on the sides of its body. The stickleback is known for its reproductive behavior. The yellow stickleback mainly feeds on aquatic insects, mollusks, shrimps, small fish, etc. It likes to live at the bottom of ditches and grows slowly.

References

Baidu Encyclopedia: Yellowthorn Fish/10496292?fr=aladdin

Breeding technology 1. Technical introduction

Yellow catfish also has a huge market in Japan, South Korea, Southeast Asia and other countries, and is an excellent species for export and foreign exchange earnings.

Artificial breeding of yellow catfish is a new breeding technology developed in recent years. Currently, there are three major concentrated breeding areas in China, namely Foshan City, Guangdong Province, Huzhou City, Zhejiang Province, and Meishan City, Sichuan Province.

2. Operation points

1. Pond conditions.

The pond area for breeding yellow catfish is not strict and can be large or small, but the water depth should be kept above 1.5 meters. The silt at the bottom of the pond should not be too thick, and a muddy bottom is preferred. The pond should be easy to drain and irrigate, and have sufficient water. Before the fish are put into the pond, the pond should be disinfected with quicklime, and 75-90 kilograms of quicklime should be used per mu of pond to completely remove wild fish and kill pathogens.

2. Pond culture.

The pond mainly raises yellow catfish, and the best fish size is 10-15 cm and 15-35 grams. About 2,500-5,000 fish are placed per mu, and 100 silver carp and bighead carp are raised to control water quality. The daily feeding amount of bait is about 1%-4% of the fish weight, and small fish and shrimp are fed at about 10% of their weight. Artificial compound feed can be prepared according to the following formula: 30%-40% fish meal, 10%-35% vegetable cake, 20-30% bean cake, 15%-18% second flour, 10%-15% rice bran, and 2%-5% attractant and growth-promoting additives. Since yellow catfish is an omnivorous fish that mainly feeds on meat, the protein content and quality of the feed are required to be high, otherwise it will affect the normal growth of yellow catfish. For the tamed artificial seedlings, artificial feed can be directly fed, while the natural seedlings need to be tamed for about a week before they can normally eat the working feed. Taming method: first sprinkle the fish paste along the edge of the pond, and after 1-2 days, when the fish begin to come to eat, gradually add artificial bait into the fish paste and throw it at the waterside at a fixed point, and finally switch to all artificial feed for fixed-point, regular, and quantitative feeding.

3. Mixed breeding.

When yellow catfish is cultured in other fish ponds, some wild fish and shrimp in the pond can be used. There is no need to feed yellow catfish separately. 50-100 fish weighing about 35 grams are placed per mu, and 10-15 kg of commercial yellow catfish can be obtained. The stocking size of yellow catfish in the culture pond should not be too small, and other ferocious carnivorous fish, such as catfish and snakehead, should not be raised in the pond.

4. Water quality management.

Yellow catfish is less tolerant to hypoxia than conventional fish and prefers clean water. Therefore, the water transparency of the pond for breeding yellow catfish should be maintained at 35-40 cm. Ponds with high stocking density should be equipped with aerators to prevent hypoxia and floating heads. New water should be added regularly. The water in the yellow catfish pond should not be too alkaline, and the amount of quicklime used for disease prevention should not exceed 20 grams per cubic meter.

5. Fish disease prevention and control.

Yellow catfish has strong disease resistance and generally does not suffer from serious diseases during breeding. However, due to the influence of season, temperature, water quality, feeding, the scaleless characteristics of the fish body, bacteria and parasites in the breeding pond, it can also cause local infection and parasites to grow in the gills and internal organs of the fish, causing diseases. It is necessary to pay attention to observation during normal breeding and take precautions in advance for abnormal conditions.