1, natural reproduction.
After the broodstock is selected out of the pond, it is placed in the spawning pool at a ratio of 1:1 or 3:2 or 2:1 for females and males, and the general migration should not be excessive. Spawning tanks can use glass jars, concrete pools, etc. When the male fish catches up with the star, the male and the female fish chase after the phenomenon. This kind of phenomenon from less to more, from short to long. A few days later, the male will chase after the female's abdomen tightly with his head, and will not give up. This is the omen before oviposition. If this time is short to long, fish nests should be added to the spawning pool in time. The material of the fish nest varies from place to place. In general, the fish nest uses goldfish, foxtail, brown silk, plastic flowers, algae, and the like. After these different materials have been cleaned, they are cut into small pieces about 30 centimeters long, bundled with dozens of roots, tied with ropes, and suspended in the middle or both sides of the water layer. As the water temperature rises, new water is injected and the opposite sex is stimulated. Generally, the broodstock is spawned on the second to third days after putting in the fish nest.
The peak period of broodstock spawning is generally between 4 and 10 am. At this time, the male and female chase to the extremely excited state. The female fish drills into the fish nest and hits the water with the tail fins while spawning, so that the eggs are more uniformly adhered to the fish nest, and the male fish also discharges white. Semen, this completes the fertilization process. After the eggs on the surface of the fish nest are commonly caught, the fish nests should be removed from the spawning tank in time and placed in hatching ponds for hatching.
2, artificial breeding.
Artificial breeding refers to inseminating species or natural fertilization in relatively specific situations, and insemination by artificial methods. When the broodstock to be selected has obvious chasing phenomenon, first check the female fish, clamp the tail shank of the female with the left thumb, forefinger and middle finger so that the brooding fish can't swing around and struggle; then use the right thumb and forefinger from Starting from the pectoral fins on both sides of the fish, gently press in the direction of the arm fins. If there are mature eggs, the eggs will be squeezed out and the eggs will be squeezed into a small enamel bowl, and then the males will be gently extruded in the same way. Fish semen, and gently mix with clean feathers, so that sperm and eggs fully contact. After a few minutes, the insemination work is completed and the egg is washed several times with plenty of water to remove excess semen. After fertilization, the eggs can be poured onto the fish nest and allowed to hatch naturally. Note that in the entire species, the water is clean, the temperature is relatively constant, and the broodstock after use should also be managed well so as to avoid loss in the breeding of goldfish, mainly by manual selection of broodstock and methods of natural reproduction, supplemented by artificial breeding methods. .
3, hatching of fertilized eggs.
Wash the aquarium (cylinder, basin) into the freshly-dried water and use it as a hatching pool. When the water temperature meets the water temperature required by the spawning pool, put it into the nest of eggs. In a pool of 2 meters square, about 6 eggs nests can be placed.
Goldfish fertilized eggs are orange-yellow, translucent, and have an egg diameter of 1.0-1.2 mm. After 24 hours of fertilization, if the egg is white, it is an unfertilized egg. Fertilized eggs are usually divided into 4 to 7 days by cell division, blastocyst stage, gastrula stage, and larval stage. Incubation of membranes depends on water temperature conditions. When the water temperature is higher than 25°C, larvae can be hatched within 2 to 3 days.
4, goldfish breeding technology.
Within 3 to 7 days after fertilization, larvae break out from the egg membrane and enter the rearing stage. At this time, the fish is 1.5 to 2.0 cm long. According to whether the body shape is normal or not, the tail fin is divided into four tails, etc., and the superior and inferior qualities are retained. The selected larvae are kept in the rearing pond for feeding. Its stocking density is about 50/sqm, and sieved plankton is added to the pool. If the water quality is relatively thin, 0.25 kilograms of fertilizer water can be added per square meter to promote planktonic reproduction. After one month of feeding, the fish body can reach 3-4 cm. At this time, the stocking density can be selected and adjusted for the second time to start the juvenile rearing stage.
After the broodstock is selected out of the pond, it is placed in the spawning pool at a ratio of 1:1 or 3:2 or 2:1 for females and males, and the general migration should not be excessive. Spawning tanks can use glass jars, concrete pools, etc. When the male fish catches up with the star, the male and the female fish chase after the phenomenon. This kind of phenomenon from less to more, from short to long. A few days later, the male will chase after the female's abdomen tightly with his head, and will not give up. This is the omen before oviposition. If this time is short to long, fish nests should be added to the spawning pool in time. The material of the fish nest varies from place to place. In general, the fish nest uses goldfish, foxtail, brown silk, plastic flowers, algae, and the like. After these different materials have been cleaned, they are cut into small pieces about 30 centimeters long, bundled with dozens of roots, tied with ropes, and suspended in the middle or both sides of the water layer. As the water temperature rises, new water is injected and the opposite sex is stimulated. Generally, the broodstock is spawned on the second to third days after putting in the fish nest.
The peak period of broodstock spawning is generally between 4 and 10 am. At this time, the male and female chase to the extremely excited state. The female fish drills into the fish nest and hits the water with the tail fins while spawning, so that the eggs are more uniformly adhered to the fish nest, and the male fish also discharges white. Semen, this completes the fertilization process. After the eggs on the surface of the fish nest are commonly caught, the fish nests should be removed from the spawning tank in time and placed in hatching ponds for hatching.
2, artificial breeding.
Artificial breeding refers to inseminating species or natural fertilization in relatively specific situations, and insemination by artificial methods. When the broodstock to be selected has obvious chasing phenomenon, first check the female fish, clamp the tail shank of the female with the left thumb, forefinger and middle finger so that the brooding fish can't swing around and struggle; then use the right thumb and forefinger from Starting from the pectoral fins on both sides of the fish, gently press in the direction of the arm fins. If there are mature eggs, the eggs will be squeezed out and the eggs will be squeezed into a small enamel bowl, and then the males will be gently extruded in the same way. Fish semen, and gently mix with clean feathers, so that sperm and eggs fully contact. After a few minutes, the insemination work is completed and the egg is washed several times with plenty of water to remove excess semen. After fertilization, the eggs can be poured onto the fish nest and allowed to hatch naturally. Note that in the entire species, the water is clean, the temperature is relatively constant, and the broodstock after use should also be managed well so as to avoid loss in the breeding of goldfish, mainly by manual selection of broodstock and methods of natural reproduction, supplemented by artificial breeding methods. .
3, hatching of fertilized eggs.
Wash the aquarium (cylinder, basin) into the freshly-dried water and use it as a hatching pool. When the water temperature meets the water temperature required by the spawning pool, put it into the nest of eggs. In a pool of 2 meters square, about 6 eggs nests can be placed.
Goldfish fertilized eggs are orange-yellow, translucent, and have an egg diameter of 1.0-1.2 mm. After 24 hours of fertilization, if the egg is white, it is an unfertilized egg. Fertilized eggs are usually divided into 4 to 7 days by cell division, blastocyst stage, gastrula stage, and larval stage. Incubation of membranes depends on water temperature conditions. When the water temperature is higher than 25°C, larvae can be hatched within 2 to 3 days.
4, goldfish breeding technology.
Within 3 to 7 days after fertilization, larvae break out from the egg membrane and enter the rearing stage. At this time, the fish is 1.5 to 2.0 cm long. According to whether the body shape is normal or not, the tail fin is divided into four tails, etc., and the superior and inferior qualities are retained. The selected larvae are kept in the rearing pond for feeding. Its stocking density is about 50/sqm, and sieved plankton is added to the pool. If the water quality is relatively thin, 0.25 kilograms of fertilizer water can be added per square meter to promote planktonic reproduction. After one month of feeding, the fish body can reach 3-4 cm. At this time, the stocking density can be selected and adjusted for the second time to start the juvenile rearing stage.