CATDOLL : CATDOLL: What do silver carp eat and how to breed them

What do silver carp eat and how to breed them

Silver carp is a filter-feeding freshwater fish that mainly feeds on zooplankton. From the fry to the adult stage, it mainly feeds on zooplankton (rotifers, cladocerans, copepods, etc.). When it is more than 1.5 cm long, it also feeds on phytoplankton, which is a typical plankton-feeding fish. When cultivated artificially, silver carp also eats artificial feeds such as bean cakes, bran, rice bran, distiller's grains, and poultry and livestock feces (chicken manure, cow manure, etc.). Artificial micro-granular compound feed can also meet the silver carp's food needs.

1. What do silver carp eat?

1. Silver carp mainly feeds on zooplankton. From the fry to the adult stage, it mainly feeds on zooplankton (rotifers, cladocerans, copepods, etc.). When it is more than 1.5 cm long, it also feeds on phytoplankton. It is a typical fish that feeds on plankton. When it is artificially cultivated, silver carp also eats artificial feeds such as bean cakes, bran, rice bran, distiller's grains, as well as poultry and livestock feces (chicken manure, cow manure, etc.), and prefers to eat artificial micro-granular compound feeds.

Silver carp is a mild filter-feeding fish. It does not compete for food or snatch food. When other fish are snatching food, it usually just waits and sees from the outside and does not enter the feeding table to grab food. Therefore, it can only be raised alone when fed with feed, and cannot be mixed with other feeding fish. Feeding should adhere to the "four fixed" principles of fixed quality, fixed time, fixed location, and fixed quantity. Feed according to the feeding rhythm of the fish species, and the feed cannot be too simple. Its feeding intensity varies with the season, and is generally higher from April to October each year.

2. How to breed silver carp

1. Build a fish pond

If you want to breed silver carp in large quantities, you must first build a suitable fish pond. The fish pond should be a certain distance away from the city, and the size can be determined according to the scale of breeding. The larger the fish pond, the better, preferably between 4-8 mu, with a water depth of more than 2 meters, and organic fertilizer should be applied for cultivation before stocking the fry, so as to provide nutrients for the silver carp and ensure its normal growth. Organic fertilizer can be selected from decomposed animal manure or cake fertilizer, but the fertilizer should be appropriate and the concentration should not be too high.

2. Stocking fish fry

To breed silver carp, the fry must be released. There are two types of release: single culture and mixed culture. Mixed culture means breeding silver carp with other fish. This can maintain the environmental balance in the fish pond, so that all kinds of fish can grow normally and create higher economic benefits. Silver carp is most suitable for mixed culture with carp, bighead carp and other fish.

3. Daily management

Silver carp has the habit of preying on plankton, so during the breeding period, the pond water must be kept fertile and the number of plankton must be high, so as to provide sufficient food for silver carp. At the same time, the pond water must be changed frequently to ensure the cleanliness of the water. In addition, during the breeding period of silver carp, when artificial feed is added, it must be fed regularly and the feed cannot be too single, only in this way can the utilization rate of feed be improved.

4. Winter management

The temperature drops significantly in late autumn and early winter. If you want silver carp to spend the winter safely, silver carp will hardly eat when the temperature drops below 10 degrees. At this time, you must gather all the silver carp in the pond and stock them in a deeper pond so that the temperature will not be so cold. If you don't have the conditions, you need to clear out all the silver carp and sell them, and then start raising them from fry next year.

If you want to make more money from fish farming, what are the technologies to increase the production and efficiency of silver carp?

1. Food Supply

Both silver carp and bighead carp are filter-feeding fish that mainly feed on plankton, organic debris and bioflocs. They can also be fed artificial feeds. The difference is that silver carp mainly feeds on zooplankton, while bighead carp mainly feeds on phytoplankton.

We can improve the food supply of silver carp from the following four aspects.

1. Directly supplement food: feeding feed, such as using fermented feed and silver carp special feed to directly increase food supply.

2. Fertilize water: Add organic fertilizer, inorganic fertilizer, biological fertilizer, etc. to promote the growth of plankton. You can use Hechenhua silver carp special biological fertilizer: water nanny + silicon calcium quick supplement to promote the growth of biological bait and balance the algae phase.

3. Supplement beneficial bacteria: Use beneficial bacteria to decompose organic matter in the pond and form bioflocs. You can use Hechen Water Enzyme, concentrated photosynthetic element, and biological water purifier.

4. Bottom improvement: Oxidize and decompose the pond bottom and reuse the nutrients on the bottom of the pond, such as using quicklime, potassium persulfate, etc. to oxidize the bottom. You can also use Hechen Biological Bottom Cleaner for biological bottom improvement.

When stocking the fish, it is also necessary to consider the food competition between silver carp and other organisms in the pond: for example, crucian carp also mainly feed on zooplankton, algae, organic debris, etc. If there are too many crucian carp, the amount of silver carp stocked can be appropriately reduced; snails will also compete with silver carp for food, so if there are too many snails, a small amount of black carp can be added to inhibit the growth of snails.

2. Grading feeding

Graded breeding can rationally utilize the pond's breeding space and food, so it is recommended to match fish species of different sizes: mainly silver carp, which can be raised in three sizes of 0.2 to 0.3 jin, 0.5 to 0.8 jin, and 1 to 1.5 jin; the size of bighead carp is 0.2 to 0.5 jin.

The advantages of this method are: 1) It reduces the competition for food between big silver carp and bighead carp; 2) After the big silver carp are released, only small-sized silver carp need to be replenished, which is conducive to rotation of catching and releasing, and effectively reduces the cost of stocking.

3. Reasonable close breeding

Reasonable density breeding takes into account the limited carrying capacity of the pond. Too high density may lead to slow growth of fish, more diseases, and failure to reach the market specifications as scheduled; too low density will increase the cost of fish per kilogram and reduce the breeding efficiency.

Since the economic value of silver carp is much higher than that of bighead carp, in the efficient breeding model of silver carp, the main goal should be to increase the yield of silver carp, so it is recommended to increase the proportion of silver carp. As shown in Figure 3, for the same 200 silver carp, the higher the proportion of silver carp, the higher the benefit per mu.

It is best to choose free-range breeding, control the water quality, and catch the fish in time, and try not to release too many.

You must clean the fish pond regularly, and you also need to know how to use high-quality fertilizers to avoid disease.

I personally think that we can think systematically from the following five aspects: ① Food supply; ② Grading feeding; ③ Reasonable density of breeding; ④ Round-robin catch and release; ⑤ Breeding management. Add organic fertilizer, inorganic fertilizer, biological fertilizer, etc. to promote the growth of plankton. You can use the special biological fertilizer for silver carp: water nanny + silicon calcium fast supplement, promote the growth of biological bait, and balance the algae phase. Grading feeding can make reasonable use of the breeding space and food in the pond, so it is recommended to match fish of different sizes.