What species of freshwater fish are easy to raise in ponds? How to prevent diseases from happening?

Pond culture of freshwater fish is a relatively common way of culture, fish culture is easy to manage, the yield is relatively high. Having said that, the species of freshwater fish cultured in fish ponds is very critical. Today, let's take a look at what species of freshwater fish are easy to raise in ponds. How to prevent diseases from happening?

What species of freshwater fish are easy to raise in ponds?

1. Silver carp

Silver carp is white. It is a filter-feeding fish, which mainly feeds on phytoplankton. Lively temperament, good at jumping, strong adaptability to the environment, wide distribution, fast growth, often mixed with other fish, is one of the main freshwater farmed fish in China. Reliable artificial reproduction of fish fry. It is easy to get sick in summer.

2. Grass carp

Grass carp is a herbivorous fish, which mainly feeds on the stems and leaves of grass, bitter grass, Potamogeton crispus and submerged terrestrial higher plants. The body surface is straw yellow. More lively temperament, like to live in the middle and lower layers and inshore water grass waters. It has strong ability to adapt to the environment, wide distribution and fast growth. It is often mixed with silver carp, bighead carp, common carp and crucian carp. It is one of the main breeding objects in China. Fish fry are also produced in large quantities by artificial reproduction. There are many diseases in summer, and the "three diseases of grass carp" (bacterial Gill rot disease, red skin disease, enteritis) are the most common and serious.

3. Herring

Herring is a carnivorous fish, which mainly feeds on molluscs such as snails and clams. The body surface is bluish gray. Like to inhabit the middle and lower waters. It grows rapidly and is often mixed with other fish, which is one of the main breeding objects in our country. Herring has the advantages of strong physique, fast growth, high survival rate, high meat gain, high yield and so on.

Second, how to prevent the occurrence of diseases in pond culture of freshwater fish?

1. Careful cleaning and disinfection is the basic guarantee for the prevention of diseases. Killing pathogens by clearing ponds will effectively prevent the occurrence of fish diseases. The disinfection medicine has quicklime, the water depth is about 10 centimeters, about 50 kilograms / mu, and the water depth is about 1 meter, 120 kilograms and 150 kilograms / mu. Tea cake (bran) water depth of about 1 meter 50 kg / mu, and there are bleaching powder, strong chlorine and so on.

2. Fish species should be strictly disinfected in the pond and strictly prevent pathogens from being brought into the pond. The disinfection method is baptism: commonly used 3% salt water for 5 min, potassium permanganate 20 mg / L for 10 min, bleach, povidone iodine and so on.

3. In the high temperature season, the whole pond should be disinfected immediately after fishing. Strictly prevent bruising and inflammation or causing fulminant hemorrhagic disease. The disinfection drugs include quicklime, water depth of 1.15 to 20kg / mu, chlorine dioxide or strong chlorine 0.3g / m3, copper sulfate 0.5g / m3, bleaching powder 1g/m3 mixture and so on.

4. Pay close attention to the performance of fish in fish ponds. There are seasonal baits for the onset of the disease. For example, enteritis was fed with oxytetracycline 2g / kg bait or garlic 250g / kg bait for 4 days. VC3 g / kg bait was added to the bait to prevent bleeding. Hepatobiliary syndrome in recent years, the bait to add heat-clearing and detoxification, liver and gallbladder protection of Chinese herbal medicine, such as plantain, rhubarb, Banlangen, fungus Chen and so on.