1. Broodstock Selection Broodstock can be selected from September to October of the previous year or from March to April in the same year. The ideal weight for selection is between 30-50 grams, with complete and healthy appendages, free from diseases, and showing strong activity. The male-to-female ratio should be maintained at 2:1 to 3:1. Male and female lobsters have distinct physical characteristics that make them easy to differentiate. Male lobsters are typically larger than females when mature. They also have larger claws, with bright red soft ticks located on both sides of their claw areas. In contrast, female claws are smaller, and most females do not have these red soft ticks. Another distinguishing feature is the location of the gonopore: in males, it is found at the base of the fifth pair of legs, while in females, it is located at the third pair. Additionally, sexually mature females have a broader abdomen compared to the narrower one seen in males. 2. Broodstock Cultivation The broodstock pond should cover an area of approximately 1200 square meters, with loamy soil at the bottom and a water depth of around 1 meter. The pond should be wide enough—more than 1.5 meters—to allow for proper movement. A reliable and clean water source is essential, along with well-constructed intake and drainage systems. Plastic films or calcium boards should be used around the pond to prevent escape. Before stocking, the pond should be sterilized using 50-60 kg of lime per square meter for 7-10 days. After disinfection, the water should be filtered to prevent wild fish from entering, and the water depth should be maintained at about 1 meter. Organic fertilizers such as decomposed livestock manure should be applied at a rate of 500-800 kg per mu. Providing hiding places like branches, roots, and bamboo tubes, as well as planting aquatic plants, will help reduce stress and improve survival rates. The broodstock density should be around 40-60 kg per mu. Before introduction, the lobsters should be bathed in 3% saltwater for 10 minutes to eliminate potential pathogens. To optimize space and maintain water quality, up to 50-100 individuals per mu can be mixed. Feeding should consist of fresh water grass, bean cake, wheat bran, or compound feed, supplemented with animal-based foods like chopped snail meat or leftover meat from livestock. The daily feeding amount varies by month: 2-3% of body weight in March, 4-5% in April, and 6-8% after May. Feedings should occur twice daily, with the evening meal accounting for 70% of the total. Water quality management is crucial—fresh water should be changed every 10-15 days, replacing about one-third each time. Lime should be applied daily at 10-25 grams per square meter to maintain good water conditions and promote gonad development. 3. Broodstock Breeding During April and May, when water temperatures exceed 20°C, broodstock begin mating. Fertilized eggs develop inside the female's abdomen and hatch into juvenile shrimp after 40-70 days. These young shrimps grow under maternal protection until they are ready to leave their mother and live independently. When a significant number of juveniles appear in the breeding ponds, they should be harvested promptly for further cultivation. 4. Wintering of Broodstock Lobsters can survive at a minimum temperature of 5°C, but shrimps around 3 cm in size face high mortality when water temperatures drop below 9°C during winter. Although adult lobsters can survive, many die after 2-3 months. Therefore, maintaining a stable water temperature between 16°C and 18°C during winter is critical for broodstock survival and breeding success. Wintering methods include covering the pond with plastic film for insulation, using electric heaters, utilizing hot spring water, employing factory residual heat, or setting up glass rooms. These techniques ensure a safe overwintering environment for broodstock. 5. Nursery Technology Although the number of lobster eggs is relatively small, the fertilization rate can exceed 98%, and the hatching rate reaches 80-85%. However, post-hatching growth is often unstable and highly sensitive to environmental factors. To improve seedling survival, the following measures are essential: 1. Water Quality Requirements Water must remain stable, clean, and within a pH range of 6.5-8. Temperature fluctuations between day and night should be minimized, and dissolved oxygen levels should stay above 5.6 mg/L. 2. Water Environment Aquatic plants like water lotus should cover about one-third of the surface, and submerged vegetation should be present at the bottom to provide shelter. Hiding spots such as caves help young shrimp attach and grow. Inlet pipes should have filters to block predators and prevent frogs from entering and laying eggs. Also, care must be taken to prevent brooding shrimps from climbing out of the pond. 3. Regular Monitoring Daily checks in the morning and evening are necessary to monitor the emergence of larvae. Once separated from the mother, broodstock should be returned to the broodstock pool. Minimizing the number of stocked ponds and avoiding mixing broodstock with newly hatched larvae helps reduce stress and increase survival. 4. Sufficient Feeding Small zooplankton such as rotifers should be introduced into the nursery 3-5 days before hatching. Small amounts of zooplankton can be collected from a dedicated feed pond and added to the nursery. Cooked egg yolk and soy milk can also be used as supplementary food for young shrimp. (Source: Liu Huachang, "Dragon Lobster," People's Daily Press, Beijing, May 2003.) Povidone Iodine Gauze Dressing Povidone Iodine Gauze Dressing,Povidone Iodine Soaked Gauze,Povidone Iodine Bandage,Povidone-Iodine Gauze Dressing Roosin Medical Co.,Ltd , https://www.roosinmedical.com