Reasonable release of crab species

Stocking Species: We recommend using authentic one-year-old Yangtze River villous crabs that are artificially bred. These crabs have a long growth period, a large market demand, high catch rates, and excellent breeding results. In contrast, other crab species such as those with short growth cycles or low catch rates often fail to develop properly during the growing season, leading to high mortality and little commercial value. Crabs that are second-instar, sexually mature, or older than expected may not grow normally and could die off quickly without proper feeding. Stocking Method: After long-distance transportation, the crabs should be acclimated gradually before being introduced into the pond. First, soak the crabs in the pond water for 2–3 minutes, then place them on the shore for 20–30 minutes. Repeat this process 2–3 times to allow the crabs to slowly absorb water and adjust to the new environment. This helps prevent them from "swelling" due to sudden water absorption. It's also advisable to keep the crabs in a small area of 1–2 mu (approximately 0.67–1.33 acres) for a short time to help them adapt. Once they are fully adjusted, they can be moved to larger bodies of water to reduce the risk of escape. Stocking Specifications and Density: The recommended stocking density is generally 800–1200 crabs per acre, with each crab weighing between 1000–1400 grams. For better control and to increase the size of adult crabs, it's important to manage the water volume appropriately. A typical stocking rate is 600–800 crabs per acre, with each crab weighing 160–200 grams. This ensures optimal growth and higher market value. Disinfection Before Stocking: Before introducing the crabs, the pond should be drained, weeds removed, and excess silt dug out. Then, apply 100 kg of lime per acre for disinfection. When the crabs are ready to be stocked, dip them in a 15 ppm formalin solution for 15 minutes to kill any potential pathogens before placing them into the pond. This step is crucial for maintaining a healthy aquatic environment and reducing disease risks. By following these guidelines, you can ensure a successful and profitable crab farming operation while maintaining the quality and health of your stock.

L-Ascorbic Acid

L-Ascorbic Acid, also known as Vitamin C, is a six-carbon lactone produced by plants and some animal species but not by humans and other primates. Ascorbic acid functions as an enzymatic cofactor for multiple enzymes, serving as an electron donor for monooxygenases and dioxygenases.

Application:

1. Antiscorbutic, antiviral
2. Analgesic, antipyretic
3. Physiological antioxidant. Coenzyme for a number of hydroxylation reactions; required for collagen synthesis. Widely distributed in plants and animals. Inadequate intake results in deficiency syndromes such as scurvy. Used as antimicrobial and antioxidant in foodstuffs.

L-Ascorbic Acid,Vitamin C 50-81-7,Ascorbic Acid

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