CATDOLL : CATDOLL: Are they marine or freshwater fish?

1. Which are marine or freshwater aquatic products?

Marine Fisheries:

Large yellow croaker, kelp, cuttlefish, hairtail fish, prawns, abalone, and seaweed;

Freshwater aquaculture:

Bighead carp, shrimp, silver carp, grass carp, and snails.

2. How to feed carp well?

Water area selection. The cages should be set up in a place that is sheltered from the wind and facing the sun, with clean water, slight currents, and a water depth of 2.5 to 3 meters. When choosing water areas near river dams, the cages should be set up in areas with slow water flow and avoid rapids.

2. Fish stocking. Grass carp is the main stock, and a small amount of bighead carp, carp, black carp, bream, silver carp and other fish species can be added. The net cage should be set up 10 days before the stocking of fish species, so that the algae attached to the cage body become lubricated. 600-800 large-sized grass carp with a tail weight of 0.2-0.3 kg are placed in one net cage, and 20-30 bighead carp, carp, black carp, bream, silver carp and other fish species are added at the same time. All fish species must be healthy, uninjured and of the same size. Before stocking, the fish species must be soaked in salt water for 5-15 minutes, and the grass carp species must be injected with the grass carp hemorrhagic disease vaccine.

3. Feeding. Feeding should be mainly granular feed, and the principle of "timing, quantity and quality" should be adhered to. If conditions permit, it is best to feed grass carp with special compound feed, and do not feed grass carp with special compound feed for carp.

4. Daily management. To avoid damage from predators such as rats and snakes, when raising grass carp in multiple cages, the cages should be 3.5 meters apart and more than 6 meters from the shore. Before and after the fingerlings are put into the cages, check whether there are holes in the cages to prevent the fingerlings from escaping. Clean the nets regularly to avoid clogging. Before feeding, remove the leftover grass residues from the cages. When feeding, the grass should be fully soaked and evenly spread on the water surface. Do not put it in piles. As the amount of forage fed increases, the grass feeding frame should also be enlarged. In hot seasons, a shed can be built on the grass feeding frame to facilitate grass carp feeding. Feeding grass and feeding should be done at intervals, and feeding grass should generally be done before feeding.

5. Forage matching. If only forage is fed to grass carp in cage culture, 35 kg of high-quality forage is needed to produce 1 kg of commercial grass carp. Adequate supply of high-quality forage is the key to ensure high yield and high efficiency of grass carp culture in cages. Under normal circumstances, each cage should be equipped with 260 to 330 square meters of feed land, where ryegrass or Sudan grass, which are favorite forages of fish, are planted. For large-scale farming of grass carp, forage is only a beneficial supplement to compound feed. By feeding forage with forage, the purpose of improving the feeding structure of grass carp and controlling the rapid growth of grass carp can be achieved. If there is a shortage of funds in the later stage, feeding forage can also ensure the normal growth of grass carp.

6. Fish disease prevention and control. In addition to disinfecting and immunizing the fish before the fish are put into the cage, it is also necessary to "treat the disease early and prevent it before it happens". In the season when fish diseases are prevalent, the water should be disinfected regularly using drugs such as Xiaoshaling and Bromochlor. Once a fish disease breaks out, in addition to taking the above measures, drugs such as berberine hydrochloride and erythromycin for aquatic products can also be taken orally.

Compared with carp, grass carp has low breeding cost, high benefits and low feed coefficient. The three-year production performance comparison test conducted by Guangdong Maritime University Fisheries Research Center, a famous authoritative research institution for aquatic feed in my country, shows that under normal breeding conditions, the cost of breeding 1 kg of carp and 1 kg of grass carp is basically the same except for the feed cost.

Let's take feed cost as an example for comparison: about 1.8 kg of carp feed is needed to produce 1 kg of commercial carp, and the average price of carp feed is 2.1 yuan per kg, which is equivalent to 3.78 yuan; about 1.5 kg of grass carp feed is needed to produce 1 kg of commercial grass carp, and the average price of grass carp feed is 1.6 yuan per kg, which is equivalent to 2.4 yuan. Grass carp can also eat pasture grass when there is sufficient forage supply, which can reduce the feed cost of grass carp farming to a certain extent. At present, the market sales price of grass carp is about 1 yuan higher than that of carp per kilogram, and the sales momentum is also good. From the simple comparison above, we can easily see which fish is more profitable.

3. How long is the life span of fish?

Different fish have different lifespans, ranging from a few months to several decades, but very few live to the end of their natural life. They either die of illness or the fish keepers become aesthetically fatigued and give them away, sell them, or even eat them.

4. Looking for advertising slogans for aquatic fertilizers

Having surplus every year depends on the abundance of fish and clams.

Vision determines the future, choose to change your vision. ——Your best choice is Yubangfeng.

5. Why are the silver carp in Qiandao Lake so black?

Silver carp, called silver carp by Chun'an people, and bighead carp, called flower carp by Chun'an people, cannot reproduce naturally in the natural waters of Xin'an River and Qiandao Lake, and are rare fish in Chun'an. According to a survey by Shanghai Ocean University, there are 104 species of fish in Qiandao Lake. Black carp, grass carp, silver carp and bighead carp are the four major fish species that are artificially released, among which silver carp and bighead carp have become the main body of artificially cultivated fish in Qiandao Lake.