CATDOLL : CATDOLL: How to strengthen the wintering feeding management of freshwater shrimp?

The wintering of fresh shrimp is an important part of the development of fresh shrimp farming. The wintering of fresh shrimp is divided into juvenile shrimp wintering and parent shrimp wintering. Juvenile shrimp wintering refers to those shrimps that are bred in August and September, but have not grown to commercial size by December. They are kept for spring shrimps. Parent shrimp wintering refers to the intensive cultivation of the parent shrimps that are selected for breeding the following year, so that they can safely winter.

(1) Choose a good wintering pond

The pond where the shrimps are placed vertically for the winter should be relatively regular, sheltered from the wind and facing the sun, with a water depth of more than 1.5 meters and abundant aquatic plants. The shrimps hibernate from December of the current year to March of the following year, which lasts for 4 months. During the winter, the shrimps usually lurk in the aquatic plants at the bottom of the pond and rarely move. In order to provide a good warm wintering environment for the shrimps, 150 to 200 kilograms of aquatic plants and 25 to 35 kilograms of willow roots should be placed in the wintering pond. (2) Reasonable stocking to improve survival rate

For overwintering broodstock, it is necessary to select broodstock that are strong, in good condition, free of disease and injury, and large in size. The size of broodstock is 200-500/kg. The ratio of female to male shrimp can be 2:1. After the broodstock are selected, 15-25 kg of broodstock can be placed per mu of pond; for overwintering juvenile shrimp, 20-40 kg of juvenile shrimp with a size of 2000-3000/kg can be placed per mu of water surface. Usually, sunny and clear weather is selected in December for overwintering. If conditions permit, juvenile shrimp can be directly released for overwintering according to the requirements of spring shrimp farming. (3) Scientific feeding and good overwintering management

Parent (young) shrimps still need to take in a small amount of food during the winter. Therefore, during the winter of green shrimps, we must insist on feeding them well. Usually, in sunny and warm weather, 1 to 2 kg of commercial bait is fed per mu of water surface each time, and feeding is done once every 7 to 10 days. The bait should be small and fine. A special person should be designated to do a good job of wintering management. In the severe winter season, the pond water should be broken and holes should be made in time to prevent the parent (young) shrimps from suffocating and dying due to lack of oxygen, so that the parent (young) shrimps can safely and smoothly overwinter.

The wintering of fresh shrimp is an important part of fresh shrimp farming. The wintering of fresh shrimp is divided into juvenile shrimp wintering and parent shrimp wintering. Juvenile shrimp wintering refers to those shrimps that are bred in August and September and have not grown to commercial size by December. They are kept for spring shrimps. Parent shrimp wintering refers to the intensive cultivation of the parent shrimps selected for breeding the following year to ensure their safe wintering.

(1) Choose a good overwintering pond. The pond for overwintering freshwater shrimps should be relatively regular, sheltered from the wind and facing the sun, with a water depth of more than 1.5 meters and abundant aquatic plants. Freshwater shrimps overwinter from December of the current year to March of the following year, which lasts for 4 months. During the overwintering period, freshwater shrimps generally lurk in the aquatic plants at the bottom of the pond and rarely move. In order to provide a good warm overwintering environment for freshwater shrimps, 150-200 kg of aquatic plants and 25-35 kg of willow roots should be placed in the overwintering pond.

(2) Reasonable stocking to improve survival rate For wintering broodstock, it is necessary to select broodstock with strong physique, intact body, no disease or injury, and large size. The size of broodstock is 200-500/kg. The ratio of female to male shrimp can be 2:1. After the broodstock is selected, 15-25 kg of broodstock can be placed per mu of pond; for wintering juvenile shrimp, 20-40 kg of juvenile shrimp with a size of 2000-3000/kg can be placed per mu of water surface. Usually, sunny weather is selected in December for wintering stocking. If conditions permit, juvenile shrimp can be directly stocked for wintering according to the requirements of spring shrimp farming.

(3) Feed scientifically and manage overwintering properly Parent (young) shrimps still need to take in a small amount of food during the overwintering period. Therefore, during the overwintering period of green shrimps, it is necessary to insist on feeding. Usually, in sunny and warm weather, 1-2 kg of commercial bait is fed per mu of water surface each time, and feeding is done once every 7-10 days. The bait should be small but fine. A special person should be designated to do a good job of overwintering management. In the severe winter season, the pond water should be broken and holes should be made in time to prevent the parent (young) shrimps from suffocating and dying due to lack of oxygen, so that the parent (young) shrimps can overwinter safely and smoothly.

This article is from: China Agricultural Press "China Biotechnology Development Report"