First, the appearance of the bullfrog: bullfrog adult divided into head, trunk and limbs in three parts. Without neck and tail. Body skin is bare, smooth and moist, with mucus. 1. The head of the head is wide and flat, slightly triangular, with a sharp front end, small resistance when swimming, and grayish-green on the head. The head has mouth, nose, eyes, tympanic membrane, vocal sac and other organs. 2, after the tympanic membrane after the trunk, cloaca hole before the trunk. It is the largest part of the frog body. It is short and wide, and its abdomen is enlarged. The inside of the trunk contains most of the husband within the frog body. 3, limbs, limbs and limbs. The forelimbs are shorter and smaller, adult male bullfrogs have developed "marriage" on the inside of the thumb. II. Feeding and management of bullfrogs 1. Basic requirements for feeding: The bait must be fresh, clean, diversified, and feeding should be based on external environmental conditions. The period and health conditions will change accordingly. There will be less or no thrashing during thunderstorms. In the morning, when the floating heads are particularly severe, and even when individual deaths occur, the feeding control should be controlled. 2, feeding methods: bait stations, the whole pool evenly sprinkle 3, feeding time, frequency and quantity, due to the ground, due to time, due to defects and other circumstances. 3-5 days after hatching is the start of feeding. The number of feedings is usually 1-2 times a day, 9-10 am and 4-5 pm. 4. Feeding amount The daily feeding amount per 10,000 tail puffers is: 5-30 milliliters of the paramecium culture fluid for 5-10 days, or 1-2 kilograms of the egg yolk plus 1-2 kilograms of filtration suspension; 11 - 30 days of age to live oysters or with food 0.1-2 kilograms; 30 days after feeding with food 2. .1-12 kg. If there is a surplus last time, the next time it will be appropriately reduced; if it is eaten soon, it should be increased. 5, feeding and management: regular patrol pool, make records, control the water temperature and water level, control the water quality, often keep the pool water clean and hygienic, often do a good job of prevention and control of pests and diseases, do a good job bait aquaculture and processing work, do a good jobèŒèšª Maintenance facilities, timely treatment of severe floating heads, timely expansion of breeding ponds, maintenance of appropriate stocking densities, and management of wintering and wintering. III. Feeding and management of juvenile frogs 1. Feeding, feeding silkworm cocoons, feeding Animal viscera2, management: control water temperature, control water quality, control humidity, timely classification, separate pool management, often do a good job of prevention and control of pests and natural enemies, do a good job of winter management of juvenile frogs IV. Feeding and management of frogs 1. Feeding: Individuals with large frogs, large amounts of food, guaranteed adequate supply of high-quality palatability feeds, and control the appropriate ambient temperature, the weight gain is relatively fast, and the monthly individual weight gain is about 30-50 grams. 2. Management: The management of adult frogs is basically the same as that of adolescent frogs. However, due to its strong ability to make frogs and good jumps, special attention should be paid to the maintenance of the wall to prevent escape. The optimum water temperature is 23-30Â°C. Shading, high summer temperatures, and strong sunlight must be done. Sprinkle water regularly on land to keep it moist. The frog eats more food and wastes are excreted. It is necessary to frequently change the water to keep the water quality from being polluted. Generally, in the hot summer season, it is best to change the water once a day, each time changing the amount of water is 1/2, the temperature of the old and new water is 1-2 Â°C, to avoid drastic changes in water temperature. The water discharged into the frog pool contains a large amount of frog urine and food residues, which can be used for the water quality of pond cultured fish. The breeding density of adult frogs is generally 50-20 per square meter, and the density is adjusted as appropriate according to factors such as the size of frogs, the management level of breeding, water temperature, and water quality. Fifth, the feeding and management of pro-frogs Pro-frogs are selected to be used for breeding and breeding for the growth of robust and high-quality adult frogs. Their individual size is generally more than 300 grams. Although these frogs have a slow growth rate, they need a lot of nutrients for breeding. 1, feeding bred frogs to eat a large amount of nutrition to fully meet the needs of their growth and reproduction, the average amount of each daily bait is 10% of body weight. The type of bait should be more, nutrition is comprehensive, and animal feed is not less than 60%. 2. The management of the pro-frog pool is not only a place for frog feeding and living, but also a place for spawning and ejaculation. It is also a place for egg hatching without artificial hatching. Therefore, the management requirements are high, and the surrounding environment conditions are not only suitable for pro-frogs, but also suitable for egg fertilization and egg hatching. First, the optimum water temperature is controlled at 25-27Â°C and the suitable water temperature is 23-30Â°C. Otherwise, it will not be conducive to frog growth, development and reproduction. Second, keep quiet and avoid noisy. Third, the pool water level is maintained at 15-40 cm. Fourth, the breeding density of pro-frogs is generally 1-2 per square meter. High density is extremely detrimental to reproduction. Fifth, after the pro-family spawning, the eggs should generally be taken care of in a timely manner (within a few hours). Sixth, we must guard against predation by various predators of the frogs and laid eggs. Seventh, we must pay special attention to doing the wintering work of frogs (the method is similar to a frog). Eighth, the time and quantity of spawning of bullfrogs are closely related to the local climatic conditions. When the water temperature rises steadily to above 22Â°C, most of them lay eggs in the morning after the rain has cleared.
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