CATDOLL : CATDOLL: Fish ponds that mainly raise bighead carp usually do not raise silver carp. The reason is

Fish ponds that mainly raise bighead carp usually do not raise silver carp. The reason is

Stocking silver carp will inhibit the production of bighead carp. Stocking silver carp is not recommended in soil pond culture. One of the main reasons is that too much silver carp will inhibit the growth of bighead carp, and the economic value of bighead carp is 3 times that of silver carp. (1) Timing: The stocking of broodstock should be completed before the end of October, and no later than February of the following year. It is best to cultivate broodstock for breeding on site, or collect broodstock from rivers, lakes, reservoirs and other waters. The collection work can be combined with the capture of adult fish in November and December, because the water temperature is lower at this time, the broodstock are not easily injured during fishing and transportation, the survival rate is higher, and they are not likely to die after being released. In addition, early capture can give the broodstock a longer period of time to recover their physical condition, so that they can develop normally after the spring and catch up with reproduction.

(2) Density: Reasonable stocking density is an important condition for good broodstock breeding. In ponds where silver carp and bighead carp are the main species, about 100-150 kg of stocking density is required per mu. In ponds where silver carp is the main species, 16-20 silver carp with a tail weight of 6-8 kg are stocked per mu, along with 2-3 bighead carp with a tail weight of 10 kg and 2-3 grass carp. In ponds where bighead carp is the main species, silver carp is generally not stocked to avoid silver carp affecting bighead carp. 4-6 grass carp with a tail weight of 6-8 kg are stocked per mu. The male-female ratio of silver carp and bighead carp broodstock is generally 1:1.5. If there are fewer male fish, the ratio can be slightly lower, but not lower than 1:1. Fish species should not be mixed in silver carp and bighead carp broodstock ponds to avoid affecting the gonadal development of the broodstock. For ponds with grass carp as the main species, the stocking amount per mu is about 130-150 kg, that is, 12-15 grass carps with a tail weight of 7-10 kg, and 2-3 silver carp or bighead carp broodstock. For ponds with black carp as the main species, the stocking amount per mu is 160-200 kg, that is, 8-10 black carps with a tail weight of 15-20 kg. The male-female ratio of black carp and grass carp broodstock is preferably 1:1.5. . . .

Silver carp is artificially raised. What should we pay attention to when breeding silver carp in freshwater?

Silver carp is artificially raised, and it is necessary to pay attention to the time when breeding silver carp in freshwater. Silver carp mainly refers to bighead carp and bighead carp (also known as whitefish). Almost all silver carp mainly filter feed on mayflies, and silver carp mainly filter feed on plants such as algae, and its gill rakers are relatively dense. Silver carp mainly feeds on mayflies, and its gill raker structure is relatively loose. So from the perspective of feeding habits, artificially farmed silver carp and bighead carp do not eat feed to grow, and there is not much difference. Relatively speaking, artificially farmed water is often richer, and silver carp and bighead carp grow faster, but I personally feel that the taste is similar to game.

Carp is an omnivorous fish. Under natural conditions, it mainly feeds on aquatic plants, organic matter, organic debris, etc. It grows relatively slowly, and generally takes 2-3 years to grow to a market size of about 1 kg. Artificial breeding, such as Hong, generally feeds feed, grows fast, and the fry can be put on the market in about one year. Of course, farmed carp tastes much worse than wild ones. It is mainly manifested in loose meat, earthy smell, very fat fish meat, and high fat content. When we buy it in the market, we can't use the difference in taste, so how can we identify it from the appearance? Grasp two points:. The bait in natural waters is far less abundant than the bait in breeding ponds, so wild carp is usually not very fat, slender and thin.

Wild carp has a long growth cycle and is in natural water conditions for a long time, so its color is richer. Therefore, those with bluish and yellowish body color are mostly wild, while those with white body color and poor luster are mostly aquacultured. It is indeed difficult to judge whether silver carp and carp are artificially cultivated or wild. For example, those raised in fish ponds are considered wild or aquacultured. If there are silver carp and carp in pure rivers, there are very few of them, and they are basically not sold in general vegetable markets. Silver carp generally refers to bighead carp and bighead carp. Silver carp mainly eats plankton algae, while bighead carp mainly eats plankton microorganisms. Fish in rivers, lakes and reservoirs are generally thinner, especially bighead carp, which has a relatively large head and a relatively thin body.

If you have experience, you can pick up the head and put your nose to the fish mouth to smell whether there is a smell of silt or waste oil. At present, many fish ponds are polluted and have a smell of waste oil. No waste oil Generally speaking, there is not much difference in taste between farmed and wild ones. At present, if silver carp and tilapia are mixed and raised, the easiest way is to look at the ratio of the fish head to the fish body. The fish head in the pond is very small, and the meat in the fish belly is very thick. It looks like the fish is very heavy. After cutting the fish belly, you can see that there is oil inside. In some vegetable markets, many people say that their fish are wild and the price is very high. There is no need to believe it too much. In fact, they are not really wild.

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