CATDOLL : CATDOLL: What two misunderstandings should we pay attention to when breeding whiteleg shrimp?

What two misunderstandings should we pay attention to when breeding whiteleg shrimp?

Feeding of white shrimp in pond culture is one of the main countermeasures for success or failure. Mastering effective feeding techniques, ensuring that white shrimp are well fed, actively improving feed utilization, and saving costs will enhance economic benefits. Therefore, pay attention to the following misunderstandings when farming.

Adhere to fixed-point feeding

The feed for Penaeus vannamei should be fed at a fixed time each time and should not be changed at will. This way, you can observe the feeding status of Penaeus vannamei and decide the amount of feed to be fed, and let the Penaeus vannamei develop a habit of feeding in a specific way without causing consumption. The feeding point can be selected at the bottom of the pond; if the shrimp pond is too small, feed it in the shallow water area around the pond.

The feed should be fresh and palatable

Crushed livestock feeds such as snails, mussels, wild fish, etc. should not be perishable, and the manufactured granular materials or artificially made concentrated feeds should not be moldy or yellow. Natural feeds such as aquatic plants and vegetables should be tender and refreshing. Generally speaking, the protein content of the commonly used feed for young shrimps is required to be more than 40%, and it is required to be fine and soft, while the protein content of the feed for farmed shrimps is required to be more than 25%. It can be made into blocks, strips, and granules. The size should be appropriate to facilitate the feeding of white shrimp. Powdered or side materials cannot be fed to adult shrimps immediately to prevent the broken feed from spreading and floating and damaging the water body, thus causing consumption. If you really feed powdered side materials, you should use wheat flour and other adhesives, boil water and mix them into a viscous state, and make them into segments or long strips of white shrimp delicious feed before feeding.

Minerals should be added to the water regularly or irregularly

During the growth process, white shrimp need to constantly absorb a lot of minerals from the water. For example, calcium and phosphorus are indispensable substances in white shrimp farming. Without them, the growth needs of crustaceans (white shrimp) cannot be met. Therefore, in addition to adding calcium and phosphorus minerals to the feed, "Qiang Ke Bao" or "quicklime powder" should also be used in the fish ponds for breeding white shrimp. The usage of the above two drugs is respectively "Qiang Ke Bao" according to the usage requirements of the instructions; "quicklime powder" is evenly sprayed in the whole pond when 50 grams of quicklime powder is used per cubic meter of water. It is best to use it once every half a month, which can quickly replenish and well meet the requirements of white shrimp for various mineral salts in the water environment.

Diversify the types of bait

The feed for white shrimp should maintain an effective combination of livestock feed and natural feed to meet the nutritional needs of all aspects. When feeding, the type of feed should be adjusted constantly due to the change of time period and time period, and the feed should not be monotonous. If the same feed is fed for a long time, it will lead to nutrient overflow and consumption; at the same time, some nutrients will be lacking, and the white shrimp will continue to have a poor appetite and eat less, which will interfere with its growth.

Generally, when the white shrimp is raised in the wild, the feed is not palatable, which leads to the small amount of food intake of the young shrimp, resulting in the weakness of the shrimp. If this happens, you can feed more animal feed; especially in the middle and late stages of breeding, because the temperature continues to rise, you can feed some natural feed at this time; in the middle and late stages of breeding or during the wintering period, the amount of animal feed should be appropriately increased in the type of white shrimp feed, combined with fattening to enhance resistance. Therefore, natural feed such as vegetable peels and fresh fruits should be kept in supply frequently to meet the comprehensive needs of the growth of white shrimp.

Many people like to overfeed when raising shrimps, thinking that the more they feed, the faster they grow. This is not the case. Only scientific and reasonable head circumference bait can make the shrimp fry grow healthily. Many farmers who have just started to raise shrimps pay little attention to aquaculture paint. Aquaculture paint must be selected from professional aquaculture paint.

The two misunderstandings are: 1. Ensure the cleanliness of the water, and 2. Choose high-quality feed, so that you can raise whiteleg shrimp well.

The first thing is to pay attention to changing the water in time. You must choose water resources with sufficient oxygen. Also, you must choose a particularly suitable area, choose suitable fry, and choose high-quality feed.

How to feed Penaeus vannamei in mixed culture

Mixed culture with grass carp: When the white shrimp reaches more than 3 cm, choose high-quality white shrimp bait for feeding. Before putting the fry, feed the bait with a crude protein content of 40, start with 2 times a day, and gradually increase to 4 times. Increase or decrease the feeding amount according to the situation of the shrimp plate and the shrimp's full stomach. After the fry is put, choose a special bait for grass carp with a crude protein content of 28 to feed the grass carp. Feed 4 times a day at 6:00, 10:00, 14:00, and 18:00. The feeding machine is slow to feed in appropriate amounts, and the feeding time of grass carp is extended, generally controlled at 1.0 hours to 1.5 hours. When the grass carp comes on stage, feed the special feed for white shrimp with a crude protein content of 32% by the pool. After one month, according to the situation of the grass carp (no dead fish), gradually increase the crude protein of the shrimp feed to 38, and add shrimp feed once at 22:00 in the evening. The feeding amount is generally controlled to be 80% full for grass carp and white shrimp. Ensuring scientific feeding is an important factor for the success of mixed culture. In this experiment, after the fry were released, the crude protein content of the shrimp feed was adjusted to prevent the grass carp from getting sick due to the high-protein shrimp feed. The grass carp was prevented from eating the shrimp feed while patrolling the edge. When the grass carp adapted, the protein content of the shrimp feed was gradually increased. Mixed culture with freshwater shrimp: The feed fed during the implementation of the feed feeding project complies with NY5072-2002 "Safety of Pollution-free Food Fishery Compound Feed". The particle size of the feed is adjusted in time according to the growth status of fish and shrimp, and the feeding amount should be changed according to the growth status of fish and shrimp, water temperature changes, weather changes and feeding conditions. The bait for spotted forktail t is a full-price artificial granular bait with a protein content of 29% to 33%. In the early stage, the size of the fish is small, and the protein content of the bait is 33%. When the spotted forktail t grows to more than 0.15 kg/tail, the protein content of the bait is gradually reduced to reduce production costs. When the fish are first released, they are fed three times a day, and then gradually reduced to twice a day, at 7-8 am and 4-5 pm. Before the release of white shrimp seedlings, they should be cultivated with suitable bait, and gradually fed with suitable artificial granular bait with a protein content of 38% to 42%. The feeding should be gradually concentrated from the early whole pond splashing to the shallow water area, and fed 3-4 times a day, 30% during the day and 70% in the evening. The feeding amount depends on the growth of the shrimp and weather changes. Taihu green shrimps are fed with all artificial granular baits. After the seedlings are released, they should be fed with suitable baits in time, and fed enough according to the growth of the green shrimps.