Saline freshwater cultivation
2018-04-27 14:00:30
1. The cage is set up on the side of a pond ready to breed fish into a feeding bridge, and a number of cages are set on both sides of the trestle. The cage material can be made of a polyethylene mesh of about 14 mesh, and the seam grows 3-5 meters wide. 2 meters, depth 1.5 meters specifications, fixed with a bamboo pole.
2. Prepare for dilute aquaculture. Whether it is artificially propagated fry or natural fish caught, they all grow in high salinity seawater. The salinity of the culture pond must be detected first, and the seedlings should be asked to descend many times. Salt desalination does not exceed the salinity of aquaculture ponds and requires the seedlings to carry out multiple desalinations. They can be stocked without exceeding the salinity of culture ponds. In the freshwater pond nursery, but also in the cage around a plastic film surrounded by a small body of water, appropriate salt before the vote to vote close to the pre-stocking salinity, so that after the fry put a period of adaptation to improve the survival rate.
3, nursery seedling density of the original pond nursery, help reduce the fish pond caused by damage. The fry used to grow is 2-3 cm in length and is stocked in 500 cages per square meter. The number of fry in each pond can be 20-30% more than the planned fry, in order to prepare for death.
4, feeding and feeding methods to feed with high-quality compound feed or fresh fish as a bait, each feeding time of not less than half an hour, the high-quality compound feed or fish gills evenly thrown into the cage, domesticated fry snatch , feeding 4-5 times a day, the amount of daily feeding is about 30% of the weight of the fish body, in order to observe that the fry can almost eat and eat enough, the specific approach is to pay attention to the weakening of the fish seedlings, then stop feeding In order to avoid overeating and cause gastrointestinal problems.
5, timely grading culture 10 days after most of the fry have grown to 5 cm, this time should be sieved pond cultivation, reduce the big fish devour fish and seedlings can not eat less than the size of the phenomenon appeared. Incubate for about 10 days in a separate pond. Mesh a small piece of water of 100 meters around the cage to release the fish from the cage and feed it for 15 days. At this time, the fingerlings have been more than 10 centimeters and then removed. Seine nets, and then enter the Datang farming, so that the purpose is to prevent the fish from entering the big ponds to feed on biological foods too early and to feed on artificially fed baits.
The middle of the fry cultivation process should pay attention to the cage water quality and dissolved oxygen. Oxygen-enhancing heads can be set up in cages, and cages should be brushed frequently to keep the water flowing and exchanged well.
2. Prepare for dilute aquaculture. Whether it is artificially propagated fry or natural fish caught, they all grow in high salinity seawater. The salinity of the culture pond must be detected first, and the seedlings should be asked to descend many times. Salt desalination does not exceed the salinity of aquaculture ponds and requires the seedlings to carry out multiple desalinations. They can be stocked without exceeding the salinity of culture ponds. In the freshwater pond nursery, but also in the cage around a plastic film surrounded by a small body of water, appropriate salt before the vote to vote close to the pre-stocking salinity, so that after the fry put a period of adaptation to improve the survival rate.
3, nursery seedling density of the original pond nursery, help reduce the fish pond caused by damage. The fry used to grow is 2-3 cm in length and is stocked in 500 cages per square meter. The number of fry in each pond can be 20-30% more than the planned fry, in order to prepare for death.
4, feeding and feeding methods to feed with high-quality compound feed or fresh fish as a bait, each feeding time of not less than half an hour, the high-quality compound feed or fish gills evenly thrown into the cage, domesticated fry snatch , feeding 4-5 times a day, the amount of daily feeding is about 30% of the weight of the fish body, in order to observe that the fry can almost eat and eat enough, the specific approach is to pay attention to the weakening of the fish seedlings, then stop feeding In order to avoid overeating and cause gastrointestinal problems.
5, timely grading culture 10 days after most of the fry have grown to 5 cm, this time should be sieved pond cultivation, reduce the big fish devour fish and seedlings can not eat less than the size of the phenomenon appeared. Incubate for about 10 days in a separate pond. Mesh a small piece of water of 100 meters around the cage to release the fish from the cage and feed it for 15 days. At this time, the fingerlings have been more than 10 centimeters and then removed. Seine nets, and then enter the Datang farming, so that the purpose is to prevent the fish from entering the big ponds to feed on biological foods too early and to feed on artificially fed baits.
The middle of the fry cultivation process should pay attention to the cage water quality and dissolved oxygen. Oxygen-enhancing heads can be set up in cages, and cages should be brushed frequently to keep the water flowing and exchanged well.