CATDOLL : CATDOLL: What is semi-intensive freshwater fish farming?

1. What is semi-intensive freshwater fish farming?

Semi-intensive farming mainly involves feeding fish with low-protein feed such as grass or agricultural by-products, etc., which are obtained locally. In the intensive farming process, fish almost entirely rely on high-protein feed such as fish meal and silkworm pupae provided by people.

2. What does extensive farming of freshwater fish mean?

Extensive culture relies entirely on available natural baits, such as plankton, organic debris and drifting objects, without any supplementary feed. This method is suitable for raising filter-feeding fish such as silver carp and bighead carp.

3. How to keep a large freshwater fish tank?

Here's how to keep a large freshwater fish tank: Step 1: Understand the names, colors, and shapes of large freshwater fish species. There are no fewer common large freshwater fish species than medium-sized freshwater fish. Large freshwater fish are more tolerant to rough treatment, so they are also easy to keep. Step 2: Find a fish tank. Generally, large freshwater fish and small fish are 10 to 20 cm long, but they grow quickly. The following types of fish tanks are commonly used for raising large freshwater fish: Extra large tanks: The volume is greater than 1/2 m3, and the water content is more than 500 kg.

Large tank: Volume 1/4~1/2 m3, 250~500 kg of water. Medium tank: Volume 1/8~1/4 m3, 125~250 kg of water. Step 3: Just like raising small and medium-sized freshwater fish, choose and place the fish tank securely. Buy electrical appliances (for super large tanks, consider buying a small air compressor), inflate and filter for several days. Finalize the species and quantity of tropical fish to be purchased.

Generally, for a tank with 400 kg of water, 4 tropical fish (15-25 cm in length) are placed first, and more are added after 1 month depending on the situation. Step 4: After the tank water is aerated and filtered for 2 days, large freshwater fish are purchased and placed in the tank. Step 5: The management in the initial stage is basically the same as that of small and medium-sized freshwater fish. However, after 1 week, they can be fed 1-2 times, or once.

Under special circumstances, you can also feed fish every few days or even a week, which will not have a big impact on the health of the fish (super-large fish and giant fish can be fed less frequently). To make sub-adult and small fish of large freshwater fish grow faster, you can feed them once more every day. Many large freshwater fish and small and medium-sized freshwater fish are fed with fresh bait or thawed small fish. Fish are rich in nutrition, and they cannot catch live fish everywhere in the wild, so they do not necessarily have to eat every day. There is no need to worry about the fish being hungry.

Step 6: Management in the normal stage. (1) Feeding. For large freshwater fish, medium-sized fish and large freshwater fish, feed once a day. If there are many fish 5 to 10 cm long in the tank, feed once more. Generally, just feed on time. The amount can be a little flexible. The fixed point depends on the situation. Large tanks can be fixed. It doesn't matter if the tank is about 1.2 meters long.

In principle, the management methods are the same as those for small tanks. Large fish can be fed with small fish, fish pieces, artificial pellets, mealworms, small crickets and other small insects. (2) Check. Same as for small tanks. (3) Observe. Basically the same as for medium-sized tanks, except that large fish, especially large carnivorous fish that use fish as bait, can stop feeding for 3 to 5 days if they feel that they have eaten too much and their condition has declined (such as not actively feeding).

(4) Water: Same as for small tank.

4. How to keep a tank of medium-sized freshwater fish?

How to keep a tank of medium-sized freshwater fish: Step 1: Understand the names, colors, and shapes of medium-sized freshwater fish. Common and easy-to-raise medium-sized freshwater fish include rose fish, big red swordfish, pearl corset fish, red scissor tail fish, small black scissor tail fish, various rainbow fish (mermaids), mandarin fish, angelfish, etc. Step 2: Find a fish tank. Most medium-sized freshwater fish are 8 to 18 cm long.

The fish tank for raising medium-sized freshwater fish can be a large tank, a medium tank, or a small tank. Step 3: Choose the fish tank you like. Purchase the electrical appliances and other items you will use, and fill it with water, aerate it, and filter it for several days (the operation method is the same as raising small fish). After purchasing the fish tank, immediately decide on the species and quantity of tropical fish to be purchased. Generally, for a tank with 200 kg of water, prepare to put in 4 to 5 tropical fish (8 to 15 cm long) first, and then gradually increase the number of fish several times after one month depending on the situation.

Step 4: Buy fish and put them in. After the water in the tank has been aerated and filtered for 2 days, buy medium-sized freshwater fish and put them in the tank. Step 5: The management in the initial stage is basically the same as that of small freshwater fish. You can feed once in the first 3 days of the new tank. After that, feed 1 to 2 times a day; a few sub-adult fish and small fish that need to grow quickly, and fish used as breeding fish (such as discus), can be fed 2 to 3 times, but the amount should not be too much.

At the same time, add more water each time. Step 6: Management in the normal stage. (1) Feeding. Feeding is generally the same as for small tanks, 1~2 times a day. Feeding should also be done at regular times, fixed quantities, and fixed locations. Because the fish in medium-sized tanks are larger and eat quickly, the feeding time should not exceed 15 minutes. After 15 minutes, the leftover bait should be immediately removed. If the filtration system is sound and the fish are small and medium-sized freshwater fish, you can consider feeding 3 times a day.

Medium-sized freshwater fish are generally fed with earthworms, small shrimps, small fish, pellets, etc. (2) Check. Same as small tanks. (3) Observe. Basically the same as small tanks. Note that the water level in the tank should not be too high. If there is no cover, prevent the fish from jumping out of the tank. If the water quality is not good, you can consider stopping feeding for 1-2 days. It is not too late to feed again after the water quality improves. Medium-sized freshwater fish are very resistant to starvation, so don't be afraid of starving the fish.

(4) Water: Same as for small tank.

5. Freshwater fish

Introducing a book

Freshwater fish farming

Author: Yang Wude Tan Enhui Publisher: Shanxi Publishing Group Shanxi Chunqiu Electronic Audiovisual Publishing House Publication Date: 2008-4