High-yield culture techniques of Ophiocephalus Argus

Ophiocephalus Argus, also known as mackerel, creeping sand fish, sand protein, etc., are warm-water marine or freshwater small fishes, widely distributed in the tropics and subtropics all over the world, the common Chinese snakehead, sharp-headed pond snakehead, sand pond snakehead, etc., at present, the pond snakehead on the market is most wild species caught in rivers or blisters, the proportion of artificial pond snakehead is still relatively low, and the breeding prospect is very broad. Next, let's take a look at the high-yield culture techniques of Ophiocephalus Argus.

Culture prospect of Ophiocephalus Argus

With the evolution of people's dietary concept from quality to nutrition, small freshwater fish (shrimp) which are not valued in history, such as yellow catfish, pond carp, black carp, rice field eel, crayfish and so on, are more and more favored by consumers. Ophiocephalus Argus, as an indigenous fish in Northeast China, is often eaten by stewed or fried sauce. Because of its unique flavor and rich nutrition, it has become a special dish for hotels and restaurants to attract guests. With the acceleration of social development, the living environment of Ophiocephalus Argus is threatened, and the amount of resources decreases sharply, which makes the price of Ophiocephalus Argus rise rapidly, and the market price has risen to about 80 yuan / kg and demand exceeds supply. To meet the market demand, investing in pond snakehead aquaculture will have a bright future.

Culture conditions of Ophiocephalus Argus

Ophiocephalus Argus has strong resistance to stress, hypoxia and low temperature, and does not require high water depth. Insect larvae, small fish and shrimp, and even fish eggs in natural waters can be used as bait. Under the condition of artificial breeding, animal offal, leftovers from livestock and poultry processing and fresh miscellaneous fish can be processed into feed with bean cake and corn meal, which can replace natural bait after simple domestication. In terms of culture methods, the benthic and feeding habits of Ophiocephalus Argus can be mixed with traditional fish to improve the utilization rate of feed and water, and to develop high-density pond culture and rice field culture. In addition, some "blisters" can also be used for the culture of Ophiocephalus Argus, which lays a material foundation for the development of large-scale culture of Ophiocephalus Argus.

Breeding techniques of Ophiocephalus Argus

1. Parent fish cultivation: pond snakehead should select individuals with strong physique, no damage to the body surface, no parasites and weighing more than 75 grams as parent fish. Mature female fish have dilated abdomen, obvious outline, soft and flexible feel. Obvious banded patterns can be seen when the abdomen is facing up, the ovaries fall to both sides, the center of the abdomen is a shallow groove, the reproductive process is light red, and full free eggs can be seen by squeezing the abdomen. It is better for male fish to have pink reproductive process.

2. Artificial induction of labor: fish chorionic gonadotropin (HCG), luteinizing hormone-releasing hormone analogue (LRH-A), DOM and salmon hormone (SGnRH-A) were used alone and mixed, and injected once and twice, the needle was injected into the base of the pectoral fin, and the effect of HCG injection was the best.

3. Hatching of fish eggs: the hatching of fertilized eggs of Ophiocephalus Argus should be carried out in the low light state in the hatching pond, both static water method and micro-running water method can be used, but they should be slightly inflated to ensure sufficient dissolved oxygen for embryonic development. In the process of hatching, bad eggs and dirt should be removed in time, and 0.5~1.0ppm furans or antibiotics should be put in regularly to prevent the occurrence of diseases. The suitable water temperature for hatching is 2629 ℃ and the salinity is 20 ~ 28 ‰.

4. Seedling cultivation: a small cement pool of 20 cubic meters and 30 cubic meters should be used in the early stage and about 50 cubic meters in the later stage. The seedling water should first be precipitated and filtered by sand, and finally filtered and injected into the pool with 250 mesh sieve silk. The suitable water temperature is 2630 ℃, the salinity is about 25 ‰, and the pH value is about 8.2. Aerated stone should be used in the cultivation process to keep the dissolved oxygen sufficient. The culture density is 5000-8000 fish / m3, 3000 fish / m3 in juvenile stage and 1500 ind / m3 in juvenile stage.

5. Seedling transportation: seedling transportation takes plastic film bags as containers, each bag contains 78kg of water, 500kg of seedlings, filled with oxygen accounts for the total volume of 2x3, and the mouth of the bag is fastened with a rubber tray. For long-distance transportation, ice is used to control the water temperature at 25: 27 ℃. After arriving at the destination, the seedling bag will float on the pond water for a while, and the fish fry will be released after waiting for the water temperature in the bag to be close to the pond water temperature.

Culture techniques of Ophiocephalus Argus

1. Disinfection of fish ponds: the culture ponds of Ophiocephalus Argus had better be in estuaries or harbors and in coastal areas with abundant fresh water sources. The area is 0.5-1.5 mu, the pond foundation is built with stone, the bottom of the pond is covered with sand, and it is flat, convenient to discharge and inject water, and the water depth is about 1.5 meters. The pond should be drained before releasing seedlings, and after clearing silt, the pond should be exposed to dry crack. After exposure, 100,150kg of quicklime per mu or 5kg of bleaching powder should be used for disinfection.

2. Fertile water in fish ponds: after 3 days of disinfection of fish ponds, paving tubes, tiles, large caliber bamboo tubes, scrapped tires or gray plastic pipes at the bottom of the pond were used as shelter, and then filtered with 40 mesh net, the water depth was 600.80 cm, and ammonium carbonate 0.5 kg / mu and calcium superphosphate 0.05 kg / mu were applied.

3. Fish fry release: fish fry can be released after 3 days of fertile water in the fish pond. Fish fry must be put into the water for more than 12 hours before sowing. Before entering the pond, the fish can be bathed with 5ppm potassium permanganate solution for about 5 minutes, or disinfected with furazolidone 10ppm inflatable medicine bath for 20 minutes. When throwing, you should carefully put the fish into the pond from the edge of the pool, and pick up the weak, dead and disabled fish species in time.