CATDOLL : CATDOLL: How many fry can a mullet produce at one time?

1. How many fry can a black carp produce at one time?

Female fish should be selected over 3 years old, and generally weigh 3 to 5 kg; male fish should be selected over 2 years old, and weigh 7.5 to 2 kg. In the non-breeding season, female and male fish should be raised in separate ponds for daily management, especially to prevent some early-maturing broodstock from spawning prematurely when female and male broodstock are in the same pond. Concentrated feed (such as peanut bran, soybeans, corn, etc.) should be fed at regular times, fixed locations, and quantitatively every day. The general feeding amount is 2 to 3 percent of the broodstock's body weight.

2. Carp breeding. When the water temperature rises above 18 degrees Celsius, breeding and hatching can be carried out. Before the carp are paired, the spawning pond and hatching pond should be prepared and the water quality should be kept fresh. You can then use the net to surround the parent fish pond and select the parent fish for breeding. If cold air invades in a few days, do not use the net. Select female fish with swollen abdomen, soft and elastic abdomen for breeding. Put them in the spawning pond at a ratio of 1:5 between male and female. Set up a fish nest at the water inlet of the fish pond. Use bamboo poles to tie into a square. The size depends on the number of parent fish. Put clean and disinfected water hyacinths with developed root systems in the middle to form a fish nest. Inject new water every day to stimulate the parent fish to estrus and lay eggs. After spawning, disinfect the water hyacinths with eggs to reduce the occurrence of water mold disease. After disinfection, transfer them to the prepared hatching pond for hatching. Reduce the trouble of transferring fry to ponds. About 300,000 eggs can be placed per mu.

2. Can black carp fry, bighead carp fry, grass carp fry and yellow bone croaker be raised together?

Don't keep them together. Grass carp can be kept together with black carp and silver carp.

Don't put the yellow croaker in it, lest this fish pierce other fish.

3. Treatment methods of Chinese tallow tree seeds

The germination rate and germination potential of Chinese tallow tree seeds were studied by using different concentrations of sulfuric acid, plant ash and sand rubbing. The results showed that the germination rate and germination potential of Chinese tallow tree seeds were the highest when 98% concentrated sulfuric acid was used to remove the wax in the seed coat of Chinese tallow tree, reaching 89.6% and 67.6% respectively. The treatment was simple, fast, low-cost, fast in seed germination, and stable in seedling growth.

4. When is the best time to sow Chinese tallow tree seeds?

The best time to sow Tung oil seeds is from February to May every year. The Tung oil seeds sown during this period have the highest germination rate and grow the best.