Aquaculture facilities for large-mouth bass should be located in areas with a clean and healthy ecological environment, free from contamination by industrial waste, agricultural runoff, or medical waste. The water source must be fresh and non-polluted, meeting the standards set by "Non-Polluted Food Freshwater Aquaculture Water Quality" (NY5051-2001). The pond bottom should be firm, with minimal silt and no leaks. The structure of the pond should be strong, with any deep holes, depressions, or cracks repaired to prevent fish from escaping or getting stuck. It is recommended to prepare 3–5 ponds, each with an area of 1,500–5,000 square meters and a depth of 1.5–2 meters. Before stocking, the ponds should be dried and disinfected. Apply 150 kg of lime per 667 square meters, or use 30 g/m³ of bleaching powder to eliminate pathogens. Disinfection must strictly follow guidelines (NY5071-2002).
For stocking, high-quality fingerlings of large-mouth bass are essential, with sizes ranging from 10–12 cm. Fish with smaller sizes may have lower survival rates. The fish should be uniform in size, bright in color, robust, and free from injuries. They should come from original species collected or purified from the Yangtze River, ensuring they are raised in pollution-free conditions. Stock approximately 1,200–1,500 fingerlings per 667 m² at 10 cm, or 800–1,000 at 12 cm. Before placing them in the pond, dip them in 3% saltwater for 5 minutes, then gradually introduce them to the aquaculture water.
To maintain water quality and control plankton, it's advisable to add about 100 catfish (20 cm) and 20 carp per pond. These supporting fish should also be disease-free and meet safety standards.
Feeding is crucial for the growth of large-mouth bass. Initially, they feed on live bait such as small fish or fish paste. Prepare the fish paste by cutting fresh, high-quality squid into small pieces, grinding them, and mixing with water. During hot seasons, frozen bait can be used. Feed three times daily: morning (9:30–10:30), afternoon (16:00–17:00), and evening (20:00–21:00). At night, increase feeding slightly due to their nocturnal feeding habits. Also, release 1:30 ratio of bait fish to ensure enough food.
When the fish grow beyond 20 cm, switch to cut-up fish, bovine liver, or other animal organs. Feed 8–10% of their body weight. As they grow, reduce feedings to twice a day and adjust portions accordingly.
Artificial feeding with full-price pellets is also possible. Use lures like fish gizzards or minced meat to train the fish. Pellets should contain 45.2% crude protein and be fed 3 times a day, adjusting amounts based on size.
Regular grading is important to avoid size differences and reduce cannibalism. After 10–15 days, sort the fish and move larger ones to separate ponds. Repeat this process every 10 days until they reach 50–100 grams.
Water quality management is essential. Maintain dissolved oxygen above 5 mg/L, pH between 7.0–8.4, and water clarity around 30–35 cm. Change 1/3–1/4 of the water weekly during summer and apply lime (20–30 kg per mu) every 10–15 days. Remove leftover food regularly and use aerators during hot or rainy weather.
Daily monitoring includes checking feeding behavior, water color, and residual bait. Adjust feeding and record all activities.
Disease prevention is key. Although large-mouth bass are resistant, regular disinfection of fish, water, and tools is necessary. Use approved disinfectants like chlorine dioxide or quicklime, following guidelines (NY5071-2002).
After 5–6 months of rearing, fish can reach 2–4.5 kg. Harvest them before reaching market size to improve efficiency. Stop feeding one day before harvest and follow withdrawal periods for drugs.
Nootropic
α- GPC is a water-soluble substance with two fatty acids removed from the main phospholipid PC (phosphatidylcholine) constituting the cell membrane.α- GPC is a water-soluble substance with two fatty acids removed from the main phospholipid PC (phosphatidylcholine) constituting the cell membrane.
Originally widely existing in organisms, it is one of the body components existing in human breast milk and body fluids. Research in the food industry shows that GPC can be obtained by removing fatty acids (deacyl) in the structure with PC in soybean lecithin as raw material. In the revision of food and drug classification in 2009 α- GPC (sn-glycerol-3-choline phosphate) is defined as food.
Purpose: brain health food. It is clinically used to prevent and treat atherosclerosis, fatty liver, neurasthenia and malnutrition. It can also be used as an additive for food, cosmetics and pharmaceutical excipients. It can be transformed into hemolytic lecithin by phospholipase a.
Prevent choline deficiency, increase neurotransmitters and promote the secretion of growth hormone. Although both eggs and eggs contain choline, it is confirmed that the uptake in the form of GPC is faster than the absorption through the portal system, and it is easier and more efficient to convert to choline. And GPC is one of the few five that can pass through the blood-brain barrier, so it can be quickly converted from choline to acetylcholine.
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