Upscale fish culture, upstart snakes: fried and delicious, the market price is 40 yuan / kg
The snake python is commonly known as the squid, which belongs to the subfamily, the genus. The individual is small, the body is slender, and the body length is high.7~8Double, high meat content, delicious meat, and the amino acid content in the muscle18.3%Of which umami amino acids account for8.4%, accounting for about the total amino acid content46%. It is a high-protein, high-quality umami economic fish. With the decline in the amount of wild resources, the current price of the snakes is as high as80~100yuan/In kilograms, it is urgent to carry out artificial breeding and seed breeding of snakes, on the one hand to meet the needs of the market, on the other hand, it can also be proliferated and released to restore natural resources. The preliminary breeding results are reported as follows:
First, the pond is ready
Choose 1.3 acres of yellow mud bottom pool that had previously been raised in mud. The water depth is above 1.2 meters, and the micro-flowing water can be kept all year round. The pond water source is the upstream reservoir water, the pH is 7.0-7.5, and the dissolved oxygen is above 5 mg/L.
The pond was dredged before stocking, the thickness of the sludge was kept at 10 cm, and after more than one month of drying, the sludge was finally disinfected with 75 kg/mu of quicklime to improve the bottom of the pond.
At present, there are no artificially propagated snake locust seedlings on the market, and the stocked snake locust seedlings are mainly natural fish species caught in rivers and lakes. From February to April, a total of 70 kilograms of artificially caught snake carp species were collected, totaling more than 8,100 tails, with specifications ranging from 5 to 10 grams per tail, with an average size of 8.6 grams per tail. Naturally caught snake scorpion seedlings have strong stress response and are more injured. Try to select healthy snake scorpion seedlings with water as much as possible. The transporting water body is anti-stress treated with 50 mg/L stress VC, transported by oxygen in a nylon bag or oxygenated in a smooth plastic box, and the transport time is within 1 hour. Before the lower pond, disinfect the bath with 2% to 3% salt for 2 to 3 minutes. After the transport, the snake seedlings like to gather in the corner and react slowly. Therefore, the stocking of the snakes should be slowly and slowly swim into the pond. . The second day after stocking, continuous disinfection with glutaraldehyde and povidone iodine for 2 to 3 times to prevent bacterial infection after injury.
Snakes mainly feed on aquatic insects in natural waters. The feeding habits are animal-like omnivorous. After artificial breeding, they must be domesticated and fed with compound feed. Considering the high meat content of snakes, the total amount of amino acids is higher than that of carp, grass carp and black carp. Therefore, the feed protein of the compound feed fed is 35% of the loach pellet feed. The feed is first domesticated before being fed, and the domestication is repeated a small amount several times, throwing it along the side of the pool. The feed table was used to check the eating situation. After 3 days, the feed table was fed. The meat feeding table was usually seen on the table for about 5 days. The normal feeding amount is 1% to 2%. According to the weather and food intake, the feed is appropriately increased or decreased.
Fourth, water quality regulation
The snake mites have higher requirements for dissolved oxygen. A small amount of micro-flowing water is used every day to keep the water body alive, so that the dissolved oxygen in the water body is above 5 mg/L. The flowing water source is the upstream reservoir water. The highest annual water temperature is not higher than 28 °C, and the water quality is clear. Due to the weak algae in the early water, the water is prone to turbidity, which is not conducive to the growth of snakes. Therefore, in the early stage, the running water should be reduced, and a small amount of biological fertilizer should be used for the fertilizer. In the middle and late stages of breeding, the amount of water should be increased to maintain a daily flow of 1% to 2%. Especially in the hot summer months, the water temperature in the culture pond is always below 30 °C.
At the same time of water transfer, in the culture of the snakes, from August to September, the bottom of the pool is used every 15 days. The commonly used base modifiers are bio-based reforms such as baking soda, potassium persulfate and Bacillus. It acts as a dirt on the bottom of the oxidation tank and reduces toxic substances such as ammonia nitrogen and nitrite at the bottom of the pool.
V. Disease prevention
In the process of breeding snakes, the disease is relatively small, and it may also be due to the fact that the snakes do not rise and are not easily found. Therefore, in the breeding process, the water quality is mainly adjusted, and the growth of the snakes is often checked by netting. The main disease in the breeding process is rot. It mainly occurs in the early stage of stocking, which can be caused by fishing injury. It shows redness and swelling at the base of the dorsal fin. After that, the part is ulcerated and the sick fish swims along the pool. Serious death. Treatment of topical povidone iodine 0.3 mg / liter + three yellow powder 0.3 mg / liter for splashing, per kilogram of feed orally added multi-dimensional 5 grams + 3 yellow powder 4 grams, used for 5 days.
Viper is a benthic fish that likes to cluster, but its activity is not strong. Fishing in the cage is not effective, but it can be pulled up by pulling the net. 2 hours before fishing, first use the stress VC1 mg / liter of the whole pool to splash anti-stress, and then slowly pull the net along the pool. After the net is taken, it needs to be quickly transferred to the cage and moved to a clean place to prevent oxygen deficiency. After the fishing, try to carry water, the density of the shipment should not be too large and pay attention to oxygen transport.
From4Stocking to the month11At the end of the month, the dry pond was arrested and the breeding time was8Months, a total of snakes3300Multi-tailed, survival rate40.7%, the average specification is22Gram/Tail, net weight gain1.56Times. Initial success has been achieved.
2. Some experiences
The breeding of snakes is more difficult. After a cycle of breeding, there are mainly some experiences: 1 The anti-stress ability of the snakes is weak. After the net catching, the stress reaction is strong, sometimes the fish is caught in the hand, It is obvious that the fish body is violently smashed, and the fish body will harden very quickly. 2 The snake mites rarely rise after dying. There is no dead fish phenomenon during this breeding test, but the survival rate of the final culture is not High, it is estimated that the mortality rate in the early stage of stocking is very high; 3 the snakes have higher requirements for dissolved oxygen, and a small number of fish species are placed in buckets with clean water bodies during the breeding process.10In the minute or so, the fish body appears to be lying on the side, turning the belly phenomenon, and the fish species that are deficient in oxygen have a very high mortality rate; 4 the fishing methods of the snakes still need to be explored, and the effect of the cage is not good, but the net is dry. The mortality rate after the pond is also high.300Multi-tailed10%The loss, fortunately, the snake is mainly sold in chilled, and has reached the commodity specifications, does not affect the sales price; 5 in the process of feeding the snake, it is more convenient to find the domestication of the snake's bait.35%The level of feed protein can basically meet the growth needs of snakes; 6 wild snakes have strong stress response, and the water quality requirements are high, and the pond we cultivate is the bottom of the yellow mud pool, and the water color is yellowish all year round.pHmaintain7.2~7.8, dissolved oxygen remains in3~8MG/l, because the stocking density is not high, keep the micro-flow water all the year round, the pond does not use the aerator, from the breeding effect, it can basically meet the breeding requirements of the snakes; 7 snakes are the benthic fish in the rivers and lakes, although the individual Small, but the nutritional value and meat content are high, the meat tastes delicious, and it is welcomed by the farmer's wild fish restaurant. It is a kind of high-quality economic fish with characteristics. The artificial breeding of snakes will have a good development prospect. .