Stocking density of cultured Pelteobagrus fulvidraco

Pelteobagrus fulvidraco I think many people like to eat, and the nutritional value of yellow eel is also very good, especially the soup protein content of yellow eel is very high, so often fish is very helpful to the human body, so now the market prospect of ricefield eel is very good.

Stocking density of cultured Pelteobagrus fulvidraco

When many friends colluded with me, they almost mentioned the problem of stocking density of Pelteobagrus fulvidraco. Due to the differences in natural conditions, market preferences and everyone's technical level, economic strength and business model, it is difficult to have a very standard answer. It is not difficult to understand that everyone is an expert. However, there is a most basic way to determine the specific stocking density, which has been introduced in various textbooks. That is:

Stocking density G (tail) = MG1000 / [(M2-M1) * N]

Description: Mmuri-net output per mu of design, in kilograms. This parameter depends on local conditions, and for the first time we can refer to the net output of blunt snout bream under the same conditions. In the future, adjustments will be made according to the actual situation.

M 1mer-the average size of fish species at stocking, in grams per tail.

M2muri-the average specification when coming out of the pool, generally with the specifications that the market likes. The unit is g / tail. The situation in different places is different and should be treated separately.

Nmurf-Survival rate (%) varies according to local conditions, specifications at stocking, and management level. The survival rate of 2-3 cm seedlings is generally 70-90%.

Matters needing attention in raising Pelteobagrus fulvidraco

Pay attention to reasonable stocking density, can improve feed utilization rate; appropriate matching of varieties, can make full use of feed, mutually beneficial symbiosis, achieve harmony in the water body, and improve feed use efficiency. In order to improve the survival rate of Pelteobagrus fulvidraco culture and reduce the waste of feed, the stocking density and fish culture must be well controlled.

The food of Pelteobagrus fulvidraco in natural waters is mainly shrimp, fish and fish eggs and some aquatic insects, aquatic plants, etc., so artificial culture can use fresh animal bait, such as small fish and shrimp, livestock and poultry processing leftovers, and can also feed bean cake, peanut cake, wheat bran and so on.

In addition, due to the large mouth crack of Pelteobagrus fulvidraco, the feed size should be increased correspondingly. With the particle size of 2 mm as the open feed, the particle size of adult fish can reach more than 5 mm. The use of sinking hard pellet feed requires that the particles should be stable in water for 15 minutes, and the use of floating bait will improve the feed utilization rate.

Culture techniques of Pelteobagrus fulvus

First, the preparation of the pond is very simple: sufficient water is required, the water quality is fresh and pollution-free, the drainage and irrigation is convenient, the area is 3-10 mu, it is best not to choose the aged pond with thick silt. Every pond must have controllable inlets and drains. The water depth is less than 2 meters, which is beneficial to the feeding of Pelteobagrus fulvidraco. The pond sterilizes the pond with lime or bleach before releasing the fish. 0.8-1.0 meters of water was injected into the pond on the second day after disinfection, and appropriate weight of fermented mature organic fertilizer was added to reproduce natural bait on the 3rd-4th day. After the toxicity completely disappeared, the fish was put into the fish and filled with water.

Second, the fingerling released and released, whether caught from natural waters or artificially bred, are required to be disease-free and injury-free, physically strong, with basically the same specifications, with a general tail weight of about 15 grams, and a stocking period of between March and April, with 1000-1500 fry per mu. Collocation breeds should not use common carp, crucian carp, tilapia and other omnivorous bottom fish with similar living habits to Pelteobagrus fulvidraco, so as not to affect the growth of Pelteobagrus fulvidraco.

Third, daily management insists on patrolling the pond three times in the morning, in the middle and in the evening, carefully observing fish activities, feeding and growth, and dealing with problems in a timely manner; frequent injection of new water can not only prevent the deterioration of water quality, but also prevent fish morbidity and floating head phenomenon. It is best to inject 20-30 cm of new water every 10 days and turn on the aerator on cloudy and rainy days. Long-term feeding will make the water quality of the pond weakly acidic, which is not conducive to the growth of Pelteobagrus fulvidraco. Quicklime is generally used to regulate the PH of pond water quality.

Fourth, fish species should pay attention to operation when transporting, stocking and fishing, so as to avoid fish injury due to collision. Attention should be paid to the strict control of the dosage when using the medicine. Pelteobagrus fulvidraco is sensitive to copper sulfate, trichlorfon and other drugs, especially with caution.

Culture and management measures of yellow croaker fry

First, to do a good job of separate pond stocking of fish fry, in the stage of fish fry cultivation, there are differences in fry growth and individual growth, and in the later stage, there are high density, inconsistent growth and grazing ability of fry in ponds. Therefore, separate ponds according to different specifications is an effective measure to improve the survival rate of fish fry and promote the growth of fry.

Second, strengthening water quality management, fertilization during fry culture, feeding and mass excretion of fish, fundamental changes in water quality, increase of ammonia nitrogen index, decrease of water transparency and other factors affect the normal growth of fish fry. Therefore, it is necessary to regularly inject new water or use microbial preparations to regulate and control the water quality to make the water quality fat, lively and cool.

Third, do a good job in feed feeding management, the current season has entered the plum rain weather, less sunlight, high temperature, low pressure, lack of dissolved oxygen in the water. Feeding should be done three look, four fixed the original side, that is, look at the weather, look at the water quality, look at the fish eating situation, timing, quantitative, qualitative, fixed point flexible control of bait quantity.

Ricefield eel I think many people are very familiar with, life may often eat. However, we may not know much about the culture of yellow eel. I hope it can help you understand some common sense of culture through the introduction of the above editor.