How to increase the survival rate of leather beard carp seedlings? This is a problem that some farmers in rural areas have been concerned about in recent years. Here are my many years of transportation experience introduced as follows:
1. Preparation before transport.
1 Intensive exercise: The seedlings are intensively used for 20-24 hours with a gauze to adapt the fish to a dense environment.
2 to choose the best: the seed of the transport must be physically strong, active individuals, otherwise it is difficult to ensure the survival rate, but also not conducive to production. The sick and frail individuals should be removed and their size and size should be separated, and the specifications of the seedlings transported in the same container should be the same. This should prevent the frail individuals from dying during the transportation process from damaging the water quality, or cause the individual to lose their own food.
3 Leather moustaches exacerbate mutual food because of hunger. Therefore, before transportation can not stop eating, but to control the amount of feeding, if too much bait, the seed is full of food, excretion of large amounts of feces during transportation, easy to corrupt the water quality; and satiety fish is more likely to die due to lack of dissolved oxygen, cast The amount of feed was sufficient to make the seedlings full of 67%.
2. Transportation methods: seed transport can use barrels, bamboo rafts, canvas bags, etc. as transport tools for transporting with water, and can also be transported with nylon bags for oxygenation; transport can be used for vehicles, boats, aircrafts, etc. The location, route, transit time, conditions, amount of traffic, etc. Bucket water transport is suitable for medium and short-distance species transport (preferably with large-caliber barrels or plastic barrels); when the road is far away, it is necessary to consider whether it is convenient to change the water along the way. Nylon bag oxygenation and sealing transport is simple and easy, fry, fingerlings, length and distance, all kinds of transport can be used, but the transport of oxygen is not convenient to change the water in order to reach the purpose within 24 hours (12 hours when the temperature is high) Land is good.
3. Transportation note:
1 Transport water: The transport water is generally taken from ponds, rivers, lakes, reservoirs, wells and tap water, requiring clean water, high dissolved oxygen, non-toxic and odorless. Well water and tap water should be fully aerated to eliminate harmful gases and increase dissolved oxygen. The temperature difference between the transportation water and the original pool water cannot exceed 3°C.
2 Shipping density: The shipping density should be fully considered according to the size of the fish, season, water temperature and transport time. Generally, a 25L (liter) capacity bucket can hold about 5,000 fishes of 3cm long, about 2500 fishes of 4-6cm long, about 1500 fishes of 7-9cm long, and about 800 fishes of 10-15cm long. The oxygen bag can hold 5000-8000 tails of 0.8-1cm long fish, 1500-2000 tails of 3cm long fish species, 600-800 tails of 5-6cm long species, and 300-500 tails of 8-10cm long species, which can be safely transported12- 15 hours.
3 Proper feeding: During the long-distance transportation, to avoid hunger and eat small fish, feed it once every 6 hours, and use cookies, bread, cakes, eggs, etc. as feed. It is better to use raw eggs by pricking a small hole in the egg with a needle, and then let the raw egg liquid flow from the small hole into the seedling bucket. Each 25L (liter) bucket of seed is fed with one raw egg, or two cakes per 10,000 fish. Half an hour after feeding, two-thirds of Chen Shui should be replaced. At the same time, dead fish must be removed in time. And the bubble on the surface of the water deteriorates with waterproof quality and affects the species to breathe air into the water.
4 timely change of water: fish seed due to the density in the transport, the water quality is easy to deteriorate, so it is necessary to frequently change the water, it is best to change 3-4 hours. The method is: first throw out the water, then add new water, while removing fecal debris and dead fish and weak fish. When adding new water, pay attention to the temperature difference. It is best not to exceed 3°C.
5 Down Pond Points: After the seedlings are shipped back, they cannot immediately go down the pond, otherwise they will cause a large number of deaths or even all deaths due to temperature differences and other reasons. Therefore, it is advisable to try to eliminate the influence of the temperature difference and reduce the density after returning it, and then put it into the rearing tank after it is adapted. Fresh water should be gradually added to the fish tanks and poured into new water bodies after they are acclimated. If the bag is transported in a nylon bag, it will not be sealed and the bag will be placed in the water body. After the water temperature inside and outside the bag is basically the same, it will be poured into the pool. The returned seedlings are best kept in the enclosure or in the small cement tanks for 1-2 days, and they are to enter the pool when they are acclimated. Feeding should also be done during feeding, feeding enough fresh food or mixed feed.
The small-sized fingerlings raised to 6cm or more in small water bodies, and then put into the product pool, can greatly improve the survival rate and growth rate.
1. Preparation before transport.
1 Intensive exercise: The seedlings are intensively used for 20-24 hours with a gauze to adapt the fish to a dense environment.
2 to choose the best: the seed of the transport must be physically strong, active individuals, otherwise it is difficult to ensure the survival rate, but also not conducive to production. The sick and frail individuals should be removed and their size and size should be separated, and the specifications of the seedlings transported in the same container should be the same. This should prevent the frail individuals from dying during the transportation process from damaging the water quality, or cause the individual to lose their own food.
3 Leather moustaches exacerbate mutual food because of hunger. Therefore, before transportation can not stop eating, but to control the amount of feeding, if too much bait, the seed is full of food, excretion of large amounts of feces during transportation, easy to corrupt the water quality; and satiety fish is more likely to die due to lack of dissolved oxygen, cast The amount of feed was sufficient to make the seedlings full of 67%.
2. Transportation methods: seed transport can use barrels, bamboo rafts, canvas bags, etc. as transport tools for transporting with water, and can also be transported with nylon bags for oxygenation; transport can be used for vehicles, boats, aircrafts, etc. The location, route, transit time, conditions, amount of traffic, etc. Bucket water transport is suitable for medium and short-distance species transport (preferably with large-caliber barrels or plastic barrels); when the road is far away, it is necessary to consider whether it is convenient to change the water along the way. Nylon bag oxygenation and sealing transport is simple and easy, fry, fingerlings, length and distance, all kinds of transport can be used, but the transport of oxygen is not convenient to change the water in order to reach the purpose within 24 hours (12 hours when the temperature is high) Land is good.
3. Transportation note:
1 Transport water: The transport water is generally taken from ponds, rivers, lakes, reservoirs, wells and tap water, requiring clean water, high dissolved oxygen, non-toxic and odorless. Well water and tap water should be fully aerated to eliminate harmful gases and increase dissolved oxygen. The temperature difference between the transportation water and the original pool water cannot exceed 3°C.
2 Shipping density: The shipping density should be fully considered according to the size of the fish, season, water temperature and transport time. Generally, a 25L (liter) capacity bucket can hold about 5,000 fishes of 3cm long, about 2500 fishes of 4-6cm long, about 1500 fishes of 7-9cm long, and about 800 fishes of 10-15cm long. The oxygen bag can hold 5000-8000 tails of 0.8-1cm long fish, 1500-2000 tails of 3cm long fish species, 600-800 tails of 5-6cm long species, and 300-500 tails of 8-10cm long species, which can be safely transported12- 15 hours.
3 Proper feeding: During the long-distance transportation, to avoid hunger and eat small fish, feed it once every 6 hours, and use cookies, bread, cakes, eggs, etc. as feed. It is better to use raw eggs by pricking a small hole in the egg with a needle, and then let the raw egg liquid flow from the small hole into the seedling bucket. Each 25L (liter) bucket of seed is fed with one raw egg, or two cakes per 10,000 fish. Half an hour after feeding, two-thirds of Chen Shui should be replaced. At the same time, dead fish must be removed in time. And the bubble on the surface of the water deteriorates with waterproof quality and affects the species to breathe air into the water.
4 timely change of water: fish seed due to the density in the transport, the water quality is easy to deteriorate, so it is necessary to frequently change the water, it is best to change 3-4 hours. The method is: first throw out the water, then add new water, while removing fecal debris and dead fish and weak fish. When adding new water, pay attention to the temperature difference. It is best not to exceed 3°C.
5 Down Pond Points: After the seedlings are shipped back, they cannot immediately go down the pond, otherwise they will cause a large number of deaths or even all deaths due to temperature differences and other reasons. Therefore, it is advisable to try to eliminate the influence of the temperature difference and reduce the density after returning it, and then put it into the rearing tank after it is adapted. Fresh water should be gradually added to the fish tanks and poured into new water bodies after they are acclimated. If the bag is transported in a nylon bag, it will not be sealed and the bag will be placed in the water body. After the water temperature inside and outside the bag is basically the same, it will be poured into the pool. The returned seedlings are best kept in the enclosure or in the small cement tanks for 1-2 days, and they are to enter the pool when they are acclimated. Feeding should also be done during feeding, feeding enough fresh food or mixed feed.
The small-sized fingerlings raised to 6cm or more in small water bodies, and then put into the product pool, can greatly improve the survival rate and growth rate.