The normal hepatopancreas is yellow-brown in color, and some of them have a white film. It connects to the stomach through the white membrane, and the hepatopancreas becomes diseased after it is damaged. The hepatopancreas are swollen, atrophied, yellow, red, and cloudy. Hepatopancreas should be treated and prevented in time when it is first discovered, do not wait until later in treatment, if the hepatopancreas are white and atrophied, the chance of treatment is relatively small.
In the case of white shrimp seedlings, the development of the hepatopancreas is divided into these periods:
When the shrimp seedlings grow to 3-4 cm, the hepatopancreas are in a developmental period. At this time, shrimp hepatopancreas are relatively fragile, the color of white shrimp hepatopancreas is mainly related to the food that white shrimp eat. For example, those who eat black shrimp slices are black, those who eat algae or zooplankton are persimmon. At this time, the hepatopancreas are very prone to problems. It is necessary to reduce the amount of feed appropriately. It is better to use bile acids to protect the hepatopancreas and keep the flora and algae in the water body stable.
Transfer period of hepatopancreas:
Shrimp seedlings 4-6 cm, this is the most important period of the development of the hepatopancreas, a layer of white film gradually appears on the surface of the hepatopancreas, and the membrane gradually develops to gradually surround the posterior border and the lower part of the hepatopancreas, which is a sign of hepatopancreas maturation. The normal hepatopancreas of cultured shrimp is brownish-brown in color, squash-shaped, and light in outline. There is a white envelope on the ventral surface (called the white area), the capsule peels off, and the tissue of the hepatopancreas is reddish-brown in color. When the color of the hepatopancreas is found to be red, yellow, dark or white, and the white area shrinks or disappears, indicating that the hepatopancreas begins to be injured, which is the best time to protect the hepatopancreas. Shrimp 4-6 cm seedlings are prone to hepatomegaly, redness of the hepatopancreas, liver atrophy and other problems, which is the most important period in the entire reproductive disease prevention process. The shrimp liver transfer stage can be divided into two stages (25-35, 45-55), which is the liver transition stage. Different areas will have slight differences of days. In the liver transfer stage, the shrimp's immunity needs to be improved. Control the food to reduce the burden of the hepatopancreas, spill the pure Chinese medicine for the protection of the hepatopancreas.
Bile acids can also be used to protect the hepatopancreas, prevent hepatopancreatic injury, prevent white stool and EMS. Eucommia ulmoides leaf extract has broad-spectrum antibacterial, antibacterial and antiviral activity, and enhances shrimp immunity. Use bile acid and Eucommia leaf extract to mix regularly to protect the hepatopancreas, maintain intestinal health, and prevent disease.
That is, in the maturity stage, usually above 6 cm, the hepatopancreas has a yellowish brown color and part of the hepatic pancreas has a white film connected to the stomach through the white membrane. If the function of the hepatopancreas is good, the shrimp eat faster. Due to the long breeding time, it is prone to bacterial liver disease. Lactobacillus butyricum can be mixed to enhance shrimp immunity, in the shrimp farming process, the hepatopancreas is generally seen with the naked eye brown in color with white edges. As the reproduction time is longer, the greater the amount of food that is fed, the more easily the water is polluted, more algae and harmful bacteria increase in the aquatic body, causing the burden of hepatopancreas, the shrimp will slow down and immunity will be weakened, so in daily life it is necessary to regularly protect the hepatopancreas during handling.
Prevention and treatment method:
If the hepatopancreas is not found to be yellow, red and swollen, it is mainly based on the nutrition and protection of the hepatopancreas. Bile acid is regularly added to food to protect the hepatopancreas. When it is appropriate to reduce food, bile acid can be poured to protect the liver.
Red liver, yellow liver and prevention of hepatomegaly have two main aspects: one is the stability of the water body, the other is to pay attention to food control during the liver transfer period, pay special attention to feeding the feed during the liver transfer period, feeding too much will increase the load on the hepatopancreas, problems caused by feeding too much shrimp are often not cured.
The use of bile acid in the shrimp liver transfer stage promotes the smooth health of the hepatopancreas, and you can clearly see that the hepatopancreas is clear and full, the stool looks shapely, the intestinal full and does not break.