CATDOLL : CATDOLL: Why should we feed shrimp with vitamins?

1. Why should we feed shrimps with vitamins mixed in feed?

Vitamins are a class of active substances with low molecular weight. The demand for shrimp is very small, but they play an important role in its life activities. It is currently believed that there are 11 water-soluble vitamins and 4 fat-soluble vitamins that are essential for shrimp.

Generally speaking, most of the vitamins originally added to shrimp feeds have been consumed during processing, storage and transportation. Therefore, mixing shrimp feeds with vitamins can replenish the vitamins that have been lost.

2. What are the main requirements for efficient and high-quality shrimp feed?

The requirements for efficient and high-quality feed are as follows. It should be nutritionally complete, with a protein content of more than 40%, of which animal protein should account for more than 1/3; crude fat greater than 3.0%; crude fiber less than 4%; crude ash less than 15%; moisture less than 12%; calcium greater than 1%; and available phosphorus around 1.7%. It should contain various amino acids, unsaturated fatty acids, vitamins and trace elements required by shrimp, and have strong feeding appeal.

It has strong soaking property and will not disintegrate in seawater with a water temperature of 25-30 degrees for 2 to 3 hours; the crushing particle size is fine, and the powder must all pass through a high-mesh sieve of 80 mesh. The surface of the feed is smooth, without thorns and cracks. The feed coefficient does not exceed 2, that is, 1 kg of feed feeds 0.5 kg of shrimp. Why do we add lipids to compound feeds? How much should we add? It is generally believed that the fat content in shrimp feed should be 4% - 8%, and 6% is the best.

Fat can provide energy. Lecithin is an important component of cell membranes, and the amount of lecithin added is generally 1%. Because the synthesis of many hormones and vitamins requires cholesterol, special lipid cholesterol can generally be added in the feed at 0.5% to 1.0%. There should also be 2% fish oil in the feed, so that the saturated fatty acids eicosapentaenoic acid and docosahexaenoic acid in the feed can reach 0.

4%, and phospholipids reach 1%.

3. Will low-quality feed induce shrimp disease?

It is best to choose high-quality feed for feeding shrimp during the breeding process. Poor-quality feed not only has low nutritional value, but also often contains harmful ingredients such as aflatoxin. These feeds are not only not conducive to the growth of shrimp, but may also induce shrimp disease. The main reason is that a small number of shrimp fry carry viruses and are in a latent infection state. Unfavorable conditions can easily induce latent infection to turn into acute infection, and then an outbreak. Therefore, it is necessary to choose feed from regular sources, which can not only ensure the provision of various nutrients required for shrimp growth, but also avoid the breeding risks caused by mildew of the feed.