White plover artificial breeding and adult rearing
2018-04-27 16:00:43
The white plover is a large-sized squid introduced from Japan. Its largest individual is 2.5 kg and grows 1 to 2 times faster than native squid. White peony has strong adaptability, cold resistance, high temperature resistance, early sexual maturity, high reproduction rate, and low breeding cost. It is similar to white quail, but its price is more than 60% higher than that of peony. In recent years, since the promotion of breeding in Neijiang City, Sichuan Province, it has become the main breed in the local pond culture, and the adult fish production ranks third only to eel and eel.
First, artificial breeding
1. Broodstock Breeding Female fish aged 2 to 3, weighing 0.5 kg or more, and male fish aged 2 and over 0.25 kg were used as broodstock. The broodstock area is suitable for 500 square meters to 1000 square meters and water depth of 1 meter to 1.2 meters. 7 days to 10 days before the release of fish, 60 kg to 75 kg of dry ponds were disinfected per 667 square meters of lime; 4 to 5 days before the release of fish, 300 kg to 500 kg of organic fertilizer per 667 square meters of fish pond were used as base fertilizer. The introduction of broodstock into the pool generally begins when the water temperature rises above 10°C in the spring and releases approximately 200 kg of broodstock per 667 square metres. Feeding is mainly based on rice bran, bran, and other concentrates. The amount of feed is 3% to 5% of the fish's body weight every day, every time in the afternoon and afternoon, and the food is consumed within 2 hours after feeding. Fertilization is mainly based on humans and livestock manure, applied once every 3 days to 5 days, and 150 kg to 200 kg manure per 667 m2. The specific fertilization amount depends on the water quality and the fertilizer condition, and it is advisable to keep the transparency of the water body 35 cm.
2. Spawning hatching spawning pool from tens of square meters to 1,000 square meters can be, depending on the scale of production may be, the depth of water to about 1 meter is appropriate. Spawning ponds are disinfected with lime of 60kg to 75kg per 667m2. Fish nests can be made of soft texture, numerous branches, non-perishable, smooth surface, non-toxic palm husk, willow root and so on. The fish nests should be bundled and tied to the bamboo poles to form a ring or gong style. In the late spring and early summer, when the water temperature is stable above 20°C, the broodstock is moved into the spawning pool, and the water is added to the dorsal fin of the fish just so that the fish can swim at the bottom and the water is backed for 2 hours to 4 hours before the water is poured to promote its production. egg. In the evening, the fish nest is placed in the spawning tank and the fish will lay eggs on it the next morning. At the peak of spawning, remove the nest of eggs that have been laid and replace the new fish nest. For every 100 kilograms of broodstock, put 40 to 60 fish nests below the water surface, but do not touch the mud as well.
Incubation ponds with an area of ​​500 square meters to 1,000 square meters, water depth of 1 meter to 1.2 meters is appropriate. The fish eggs are sterilized in the clear ponds from the 7th to the 10th days before the lower pool, and the methods are the same as those in the pro-fish ponds. After nesting eggs, fish nests are gently moved into the hatchery pool and fixed at a depth of about 10 cm below the water surface. If the water temperature drops to 15°C, it should sink deeper, but not on the mud bottom. The water intake per 667 square meters of water can be controlled at about 300,000 to keep the fry density at 150,000. When the water temperature is between 20°C and 24°C, fertilized eggs can hatch within 45 to 48 hours.
3. Fry cultivation Fish fry 1 day before the film is applied to basal fertilization, every 667 square meters of planting manure, 200 kg to 300 kg of livestock manure, and cultivating plankton for feeding fry. When the fry is able to swim for 3 days to 5 days after the fish is filmed, the fish nest is gently removed and the feed is started. Feed egg yolks 2 days before and feed 1 per 100,000 fry. The egg yolk is kneaded with water and fed 1 to 2 times a day. After the soybean milk is fed, 2 times to 3 times a day, 0.7 kg to 0.8 kg of soybeans per 667 square meters (12 kg to 13 kg of pulp). Every 1 day to 2 days topdressing 1 times, every 667 square meters Shi Ren, livestock manure water 50 kg to 80 kg, so that the pool water is stable, transparency is maintained at about 35 cm is appropriate. When the fry grows to 2 centimeters or so, it is converted into feeds such as bran and rice bran. Every day, about 20,000 fry are fed with 2 kg to 3 kg of feed. When the fry grows to 2.5 cm to 3 cm, it can be fed to adult fish ponds.
Second, adult fish breeding
1. The stocking density should be suitable for the breeding of adult fish. The fish can be used every year. Fry of the year can also be used. However, the stocking density of the seed must be appropriate. If the stocking density is too high, the weight of the flesh can not reach more than 150 g. Product specifications, if the density is too thin and waste of water and feed, fish production is also low. Practice has proved that under general mixed feed conditions, 260 to 2,000 fish species are reared every 10 to 15 grams per 667 square meters at the end of winter and early spring, and 3000 fish fry are added at the age of 3 centimeters at the beginning of June. At the end of the year, 300 kg of fish can be produced per 667 square meters, and more than 2000 fish tails can be weighted from 10 g to 15 g. If 3000 to 4000 fish fry cultivars are cultivated every 667 square meters, they can obtain 667 fish. A good harvest of 250 kg to 300 kg of fish produced in square meters. If the quality of the feed is increased (protein content of more than 20%), not only can the tail weight grow to more than 200 grams, but the output can also reach about 400 kilograms.
2. Mixed fish should be selected for the best mixed culture of white peony and herbivorous fish (such as grass carp, head lice) because their feces and debris are rich in organic debris and can be converted into plankton, just for White pelicans feeding. In order to bring into full play the productive potential of the waters, a small amount of cockroaches, cockroaches and cod fishes should also be mixed, but the total output of these fishes should not exceed 15% to 20% of the total production of fish ponds. During feeding, care should be taken to feed the fodder first and then pellet feed or powdered feed to prevent herbivorous fish from catching the concentrate.
3. Feed and fertilizer should be sufficient for white fish is omnivorous fish, it should apply enough base fertilizer, timely fertilizer, cultivate enough natural feed to promote fish feeding. At the same time to feed rice bran, bran and other concentrates to meet the long-term needs of the day.
4. In the summer and autumn seasons, when it is necessary to catch the summer and autumn seasons, some individuals with a tail weight of over 100 grams should be arrested for sale (at this time, the fish supply season is off-season) to reduce the load on the pond and promote small-scale fish species. The growth and development. This is a desirable move whether considering the adjustment of market commodities or from the perspective of economic efficiency.
First, artificial breeding
1. Broodstock Breeding Female fish aged 2 to 3, weighing 0.5 kg or more, and male fish aged 2 and over 0.25 kg were used as broodstock. The broodstock area is suitable for 500 square meters to 1000 square meters and water depth of 1 meter to 1.2 meters. 7 days to 10 days before the release of fish, 60 kg to 75 kg of dry ponds were disinfected per 667 square meters of lime; 4 to 5 days before the release of fish, 300 kg to 500 kg of organic fertilizer per 667 square meters of fish pond were used as base fertilizer. The introduction of broodstock into the pool generally begins when the water temperature rises above 10°C in the spring and releases approximately 200 kg of broodstock per 667 square metres. Feeding is mainly based on rice bran, bran, and other concentrates. The amount of feed is 3% to 5% of the fish's body weight every day, every time in the afternoon and afternoon, and the food is consumed within 2 hours after feeding. Fertilization is mainly based on humans and livestock manure, applied once every 3 days to 5 days, and 150 kg to 200 kg manure per 667 m2. The specific fertilization amount depends on the water quality and the fertilizer condition, and it is advisable to keep the transparency of the water body 35 cm.
2. Spawning hatching spawning pool from tens of square meters to 1,000 square meters can be, depending on the scale of production may be, the depth of water to about 1 meter is appropriate. Spawning ponds are disinfected with lime of 60kg to 75kg per 667m2. Fish nests can be made of soft texture, numerous branches, non-perishable, smooth surface, non-toxic palm husk, willow root and so on. The fish nests should be bundled and tied to the bamboo poles to form a ring or gong style. In the late spring and early summer, when the water temperature is stable above 20°C, the broodstock is moved into the spawning pool, and the water is added to the dorsal fin of the fish just so that the fish can swim at the bottom and the water is backed for 2 hours to 4 hours before the water is poured to promote its production. egg. In the evening, the fish nest is placed in the spawning tank and the fish will lay eggs on it the next morning. At the peak of spawning, remove the nest of eggs that have been laid and replace the new fish nest. For every 100 kilograms of broodstock, put 40 to 60 fish nests below the water surface, but do not touch the mud as well.
Incubation ponds with an area of ​​500 square meters to 1,000 square meters, water depth of 1 meter to 1.2 meters is appropriate. The fish eggs are sterilized in the clear ponds from the 7th to the 10th days before the lower pool, and the methods are the same as those in the pro-fish ponds. After nesting eggs, fish nests are gently moved into the hatchery pool and fixed at a depth of about 10 cm below the water surface. If the water temperature drops to 15°C, it should sink deeper, but not on the mud bottom. The water intake per 667 square meters of water can be controlled at about 300,000 to keep the fry density at 150,000. When the water temperature is between 20°C and 24°C, fertilized eggs can hatch within 45 to 48 hours.
3. Fry cultivation Fish fry 1 day before the film is applied to basal fertilization, every 667 square meters of planting manure, 200 kg to 300 kg of livestock manure, and cultivating plankton for feeding fry. When the fry is able to swim for 3 days to 5 days after the fish is filmed, the fish nest is gently removed and the feed is started. Feed egg yolks 2 days before and feed 1 per 100,000 fry. The egg yolk is kneaded with water and fed 1 to 2 times a day. After the soybean milk is fed, 2 times to 3 times a day, 0.7 kg to 0.8 kg of soybeans per 667 square meters (12 kg to 13 kg of pulp). Every 1 day to 2 days topdressing 1 times, every 667 square meters Shi Ren, livestock manure water 50 kg to 80 kg, so that the pool water is stable, transparency is maintained at about 35 cm is appropriate. When the fry grows to 2 centimeters or so, it is converted into feeds such as bran and rice bran. Every day, about 20,000 fry are fed with 2 kg to 3 kg of feed. When the fry grows to 2.5 cm to 3 cm, it can be fed to adult fish ponds.
Second, adult fish breeding
1. The stocking density should be suitable for the breeding of adult fish. The fish can be used every year. Fry of the year can also be used. However, the stocking density of the seed must be appropriate. If the stocking density is too high, the weight of the flesh can not reach more than 150 g. Product specifications, if the density is too thin and waste of water and feed, fish production is also low. Practice has proved that under general mixed feed conditions, 260 to 2,000 fish species are reared every 10 to 15 grams per 667 square meters at the end of winter and early spring, and 3000 fish fry are added at the age of 3 centimeters at the beginning of June. At the end of the year, 300 kg of fish can be produced per 667 square meters, and more than 2000 fish tails can be weighted from 10 g to 15 g. If 3000 to 4000 fish fry cultivars are cultivated every 667 square meters, they can obtain 667 fish. A good harvest of 250 kg to 300 kg of fish produced in square meters. If the quality of the feed is increased (protein content of more than 20%), not only can the tail weight grow to more than 200 grams, but the output can also reach about 400 kilograms.
2. Mixed fish should be selected for the best mixed culture of white peony and herbivorous fish (such as grass carp, head lice) because their feces and debris are rich in organic debris and can be converted into plankton, just for White pelicans feeding. In order to bring into full play the productive potential of the waters, a small amount of cockroaches, cockroaches and cod fishes should also be mixed, but the total output of these fishes should not exceed 15% to 20% of the total production of fish ponds. During feeding, care should be taken to feed the fodder first and then pellet feed or powdered feed to prevent herbivorous fish from catching the concentrate.
3. Feed and fertilizer should be sufficient for white fish is omnivorous fish, it should apply enough base fertilizer, timely fertilizer, cultivate enough natural feed to promote fish feeding. At the same time to feed rice bran, bran and other concentrates to meet the long-term needs of the day.
4. In the summer and autumn seasons, when it is necessary to catch the summer and autumn seasons, some individuals with a tail weight of over 100 grams should be arrested for sale (at this time, the fish supply season is off-season) to reduce the load on the pond and promote small-scale fish species. The growth and development. This is a desirable move whether considering the adjustment of market commodities or from the perspective of economic efficiency.