How to improve the spawning rate during the breeding of mandarin fish?

I think that in the process of mandarin fish farming, if we want to better improve the spawning rate, we should keep abreast of their living habits and feed them regularly.

Osmanthus fish in the Pearl River Delta area is relatively large, and has a long history of breeding, with the increasing number of this fish, the disease is also increasing, the disease is more and more, and the prevention and control is very difficult, especially in recent years the most common aphid disease. Less copper sulphate should be used in the middle and late stages of farming, because such substances are more toxic and dangerous in the process of use. Therefore, in the breeding process, diseases like **, you can use some insecticidal drugs or zinc sulfate.

The osmanthus fish has delicate flesh and no fine spines, and the taste is sweet and delicious. A wide variety of dishes can be cooked. Osmanthus is a ferocious and carnivorous fish.

It has a strong ability to distinguish bait. Feed mainly on live fish and shrimp throughout their lives. The pond for breeding mandarin fish requires a sandy bottom, less silt, an area of 3 5 acres, a water depth of meters, convenient drainage and irrigation, light water quality, no turbidity, no sewage inflow, and a small amount of submerged aquatic weeds in the fish pond.

Newly opened ponds depend on the quality of the soil, and acidic ponds and ponds with turbid water are not suitable for raising mandarin fish. Interculture cultivation method: refers to the cultivation of palatable bait fish before stocking mandarin fish summer flowers, and then stocking mandarin fish fry, so that mandarin fish and bait fish grow in the same pond.

This cultivation method is generally stocked with 3 cm of mandarin fish per mu, and the stocking amount of forage fish is about 700,000 per mu.

High nitrite levels in aquaculture water are not only a major problem in mandarin fish farming, but with the increase in culture density, almost all aquaculture species are facing this problem. Over-fertilization. This includes the application of organic and inorganic fertilizers.

Some ponds have been used for many years of aquaculture, and the sediment is fertile, and the abundant plankton will naturally be cultivated after entering the water, and there is no need to apply basal fertilizer or a small amount of application. The basis of top dressing is to observe the water quality scientifically, and it cannot be arbitrarily top dressed.

The physical method is mainly physical adsorption. Commonly used drugs are polymer flocculants, such as water purification and detoxification, quick solution, Bishuian, etc. However, the physical method is mainly used for auxiliary explanations, and although the effect is fast, it is easy to repeat.

Mandarin fish, also known as osmanthus fish, its meat is delicate, delicious, is one of the domestic freshwater precious fish and export to earn foreign exchange, the prospect of breeding is promising. Its general symptoms include comprehensive hemorrhagic septicaemia, water mold, myxosporidiosis, and anchor lice

In the fingerling stage, it is mainly manifested as parasitic diseases, such as wheel worm disease, oblique tube worm disease, ring worm disease, etc. In the stage of adult fish culture, it is mainly manifested as bacterial venereal diseases, such as rotten gills, enteritis, rotten tails, etc.; A few also have outbreaks of viral diseases, such as white liver and white gill; Sometimes complications of insects, bacteria, and poison occur. Therefore, we must attach great importance to prevention and adhere to the principle of giving priority to prevention and combining prevention with prevention.

Mumps rot is present in most aquaculture animals, but also in mandarin fish. Rotten cheeks are divided into bacterial, fungal and parasitic cheeks. The gills are an important organ of fish respiration, and if the gills are damaged, the prevention and treatment will be bad, and the losses will be heavy.

Now they are all high-density breeding, and rotten gills are quickly transmitted and the threat is great.

Bacterial rotten gills are sterilized with gallic liquid, chlorine dioxide, and bleaching powder, and then allicin and aquatic multi-vitamins are taken internally. Parasitic rotten gills, first kill insects, and then feed aquatic multi-dimensional to repair the damage.

1. Mandarin fish comprehensive hemorrhagic septicaemia, in recent years, a serious disease characterized by "white gills" and "white liver" has occurred and is prevalent in mandarin fish farmed in the Pearl River Delta region of Guangdong, which is called mandarin fish comprehensive hemorrhagic septicaemia. This disease has a rapid epidemic and high incidence, and is the most harmful viral disease, which is the most widespread in summer and autumn, and occurs less in the seedling stage, and more in adult fish. The incidence rate is more than 50% and the mortality rate is more than 90%.

2. Water mildew, fry and adult stage can occur. Diseased fish have white flocculent matter on the surface of the body and the tips of the dorsal spines. After the onset of the disease, soak it in 20%-30% salt water for 5-10 minutes, or soak it in 1% salt water and vinegar for 5 minutes, or use high iodine mold net, a bottle of 2 acres, all have good curative effects.

Mandarin fish, commonly known as cinnamon, is a special freshwater fish in China, which is delicious in taste, high in protein content and rich in nutrition, so it is widely loved by consumers. In addition, mandarin fish grows fast, high yield, economic value is greater, at present, in addition to the Qinghai-Tibet Plateau, mandarin fish is produced in large rivers, river systems and lakes in various places, and the aquaculture distribution is very extensive. So how to breed mandarin fish well?

Let's find out.

1. Pond selection.

The main pond for mandarin fish requires the selection of newly opened ponds with leeward and sunny conditions, loamy sand* substrate, and less or no silt. The bottom of the pool should be flat, slightly inclined to the drainage outlet, the water depth is meters, the irrigation and drainage system is perfect, the water source is sufficient, fresh, pollution-free, and the water quality is good.

2. Clear pond water cultivation.

Qingtang has two key points, first: exposure to the sun for 1-3 months; Second: quicklime clear the pond, after exposure to the sun, water 5-10cm, dig a few small holes evenly around and in the middle of the pond, and add water to dissolve the quicklime.

A few days in advance, wait for the water quality to stabilize before putting seedlings, and use a dense net to prevent all kinds of debris from entering the water; It is recommended to cultivate a pond of fertile and stable good water, which can be used with tea seeds, organic fertilizer, inorganic fertilizer, etc., and the water quality requires PH, ammonia nitrogen, and nitrite to be in a reasonable range.

3. Stocking of fingerlings.

In order to ensure the survival rate of breeding, the stocking size must be more than 3 cm, and 1000-1500 mandarin fish fingerlings of 3-4 cm per mu are generally stocked.

4. Feed feeding.

Provide palatable, sufficient, healthy bait fish is the basis for the success of mandarin fish farming, mandarin fish feed live fish and shrimp for life, different growth periods have different requirements for the size and intake of bait fish, specifically: fish species breeding period bait fish accounts for 50%-70% of the body length of mandarin fish, and the amount of eclipse accounts for 50%-70% of the body mass of mandarin fish. Forage fish account for about 30% of the body length of mandarin fish at the grow-up stage, and the amount of solar eclipse accounts for 10%-20% of the body mass of mandarin fish.

5. Daily management.

1) Frequent patrol of the pond: find that the mandarin fish swims slowly or dies in time to check and catch ashore at the same time, observe whether the bait fish is sufficient, whether the mandarin fish chasing fish is normal, and learn to see the mandarin fish feces, the feces are loose and the end is yellow, there may be enteritis, and finally anti-theft measures must be taken.

2) Oxygenation: dissolved oxygen limits the output, multi-oxygen must be prolific, and at the same time it is necessary to increase oxygen, it is recommended to open the aerator on rainy days, at night, and add fish larvae on the same day.

3) Water quality management: ammonia nitrogen, hydrogen sulfide, nitrite, and pH value in the pond need to be tested on a regular basis, and biological agents should be used regularly for water quality control.

In general, mandarin fish farming is highly profitable, but if you want to get a better income, it is very important to master scientific farming technology, and the focus is also on combining the growth habits of mandarin fish to provide a good living environment for them.

When breeding live crucian carp, we must pay attention to the temperature problem, and also pay attention to the feed problem, never feed the live mandarin fish with low-quality feed, and also pay attention to the water quality problem, do not let the live mandarin fish grow in a very poor water quality environment, but I think the most important point is that when breeding live mandarin fish, we must pay attention to safety issues, do not let yourself be injured.

The air quality in the rainwater of breeding live mandarin fish should also be planted with some aquatic plants, some nutrient solution should be added to the water, and the fish should be fed at intervals, so that it can be better, and can ensure that the fish live more fat.

Pay attention to the choice of ponds, you can carry out artificial breeding, or understand the way of breeding, you can also regularly change the water source, pay attention to the selection of feed, in the breeding process, we must pay attention to the selection of varieties, it is possible to carry out outdoor breeding.

You can carry out artificial breeding, or outdoor farming, choose high-quality water sources, pay attention to the surrounding environment, pay attention to the cultivation of fish fry, and understand the basic breeding technology.

Pay attention to the choice of ponds, you can carry out artificial breeding, or understand the breeding method, you can also regularly change the water source, pay attention to the selection of feed, and pay attention to the selection of varieties during the breeding process, you can carry out outdoor breeding.

Cultivation of special pools.

Fish pond conditions and stocking area is not too large, generally in the hectare or so, above the water depth, good drainage and irrigation conditions, it is best to keep the flow of water frequently, stocking density in every 1000 square meters of stocking about 4500, before stocking we must thoroughly clear the pond, the use of lime water for disinfection, is conducive to improving the survival rate. Generally, the method of artificial feeding bait is adopted, and the mandarin fish has more requirements for bait, one to live, two to have no hard thorns, three to be palatable, and four to be timely.

There are many kinds of mandarin fish breeding technology, mainly pond construction, fry selection, stocking density, feed management, disease control, etc., only to do a good job in all aspects of technical management, in order to achieve more efficiency.

Surface selection. Mandarin fish can be farmed in waters suitable for raising silver carp and bighead carp in cages, such as rivers and reservoirs. Mandarin fish fingerlings into the box and stocking specifications.

The time of fingerlings into the box should be flexibly mastered according to the climatic conditions of each region, generally at the end of June and early July, and the size of the fingerlings is 8-10cm.

Mandarin fish is a special freshwater fish in China, belonging to the genus Mandarin Fish of the Perciformes family. Its taste is delicious, high in protein, rich in nutrition, and it is one of the precious fish. Mandarin fish grows fast, yields high and has great economic value.

Mandarin fish reproductive season is generally in May to early July every year, like to spawn in the gentle flowing water, each time the amount of eggs between 60,000 200,000, the eggs laid are floating eggs, because their eggs are slightly heavier than the water, can drift with the flow in the flowing water layer, and continue to develop and grow. So today, let's take a look at the many requirements for live mandarin fish farming, what are the requirements for live mandarin fish farming?

1.Choose a good breeding environment.

It is recommended to choose the breeding area to stay away from toxic and harmful places and pollution sources or pollutants. The water source in the breeding area is sufficient, the drainage and irrigation are convenient, and there is no industrial "three wastes" pollution source, the pond for breeding mandarin fish must be removed from excessive silt, the dry pond is exposed, and the bottom is hard.

2.Bait must be sufficient.

Mandarin fish is a typical carnivorous ferocious fish, with live fish and shrimp as bait is the feeding characteristics of mandarin fish, such as not getting live bait fish, that is, cannibalism, if a mandarin fish swallows another mandarin fish, it may be stuck, resulting in the death of both fish. Insufficient bait fish can also make the fish emaciated, weakened, prone to disease, affect growth, and even starve to death. Therefore, under normal breeding conditions, it is necessary to have sufficient quantities and appropriate size of forage fish.

It can be used in the mandarin fish breeding pond at the same time to support the breeding of bait fish, but also can be equipped with a special bait fish pond to breed bait fish, and regularly catch the bait fish into the mandarin fish breeding pond.

3.Water quality management.

Mandarin fish farming has high requirements for water quality, especially the amount of dissolved oxygen, and a moment of negligence can lead to the annihilation of the whole army. Dissolved oxygen in the water is more than 5 mg L is conducive to the growth of mandarin fish, can not be less than 2 mg L, mandarin fish farmers in Dongtai area, Jiangsu Province install dissolved oxygen control instrument for each pond mouth, the setting value is mg L, below this value, the automatic start of aeration equipment to aerrate the whole pond. Ammonia nitrogen, hydrogen sulfide, nitrite, and pH value in the pond need to be tested regularly, and biological agents should be used regularly for water quality control.

The requirement of live mandarin fish farming is that the water quality must be clear, and the water quality must be stable. It is better to have less taro paste in the water, and then it must be towards the sun. Do not feed the fry with too much feed, and then the fry must be prepared with oxygen.

The water quality of the aquaculture should be fresh, there should be aeration equipment, there should be no silt in the breeding place, and it should be prepared with small fish and shrimp and other food, and the temperature should be controlled at about 15 to 32 degrees.

To choose a good breeding environment, the bait must be sufficient, the water quality must be managed, the environmental protection and pollution-free must be ensured, and the meat feed must be prepared.

There must be a good breeding environment, and the food for feeding the fish must be sufficient, the water must be changed frequently, and the depth of the water and the oxygen of the water must be paid attention to.