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Fish Shrimp Mo Forgets Gavin C
Insufficient vitamin C in fish and shrimp feed is mainly manifested as loss of appetite, slow growth, abnormal body shape, slow swimming, and even serious mammal-like scurvy symptoms. For example, in the absence of vitamin C, grass carp can cause eyeball congestion, fin stem bleeding, lid hemorrhage and abdominal bleeding. Various types of fish suffer from vitamin C deficiency and their performance varies, but most of them cause poor growth, low immunity, and low feed conversion rates, causing some unnecessary losses to farmers. Vitamin C is also important for maintaining the growth and development of shrimp. When there is a lack of vitamin C in the feed, the young shrimp cease to grow. The adult shrimp shows slow growth and the ability to resist disease is reduced, ultimately resulting in a lower feed conversion rate. Typical vitamin C deficiency in shrimps is "black death", such as slow wound healing, black under the shell, ulceration, and mass death. In addition, when the vitamin C is lacking, it is easy to appear soft shells, prolonged clam shell cycle, muscle turbidity, and chaos and other symptoms. It is worth noting that the theoretical demand for vitamin C in fish and shrimp is very different from the actual amount added. Because vitamin C has a strong reduction, it is very unstable, easy to be air oxidized in alkaline or acidic solution, UV, heating and metal ions and other physical and chemical factors can also make vitamin C destroyed. Therefore, in the process of making feed, the actual amount of vitamin C added should be greater than the theoretical demand. At present, the actual amount of vitamin C added in the feed is mainly based on two points: one is the nutritional requirements of the relevant species; the second is the stability of the varieties used. The recommended amount of vitamin C in feed is generally 4-5 times the demand.