Ask a master to help me guide the lobster culture (Shaoxing, Zhejiang)

First, the preparation before stocking

The pond should have good water intake and drainage facilities. Around the pond, a 50-cm-high escape wall should be surrounded by bamboo pieces and nets.

Set up shrimp habitats in aquaculture waters, such as rubble, bricks, stones, nets, old tires, grass dragons, etc. As a shrimp nest to shelter and defend the enemy.

Aquatic plants such as water hyacinth, water peanut, water hyacinth and water bamboo are planted around the pond, and the coverage is generally 1/3 of the water surface of the pond, which is beneficial for lobster to shade and breed plankton that lobsters like to eat.

Generally, newly-built lobster ponds can be cleaned with quicklime water, with an area of 100 kg per mu. If lobsters are raised in old ponds or lakes, they should be dredged, trimmed and exposed to the sun 65,438+00-65,438+05 days before their release, and disinfected with 50 kilograms of quicklime per mu in dry ponds. At the same time, the predatory wild enemies such as catfish, loach, snakehead, snake and rat in the pond will be completely eliminated.

Before stocking 65,438+00-65,438+05 shrimp larvae, 65,438+000-200 kilograms of fully decomposed manure such as pig manure were generally applied to each mu of water surface to cultivate plankton and provide a proper amount of organic debris as shrimp feed.

A water curtain, preferably 60-80 mesh, should be installed before the pond enters the water to prevent the enemy from entering the water. The depth of the pool water is maintained at 50-80 cm, and the transparency is between 30-40 cm.

Second, put shrimp seedlings.

In the sunny morning and evening, it is advisable to raise 6000-8000 young shrimps with a length of 2 cm or 4000-6000 young shrimps with a length of 3-5 cm per mu. The specifications of shrimps stocked in the same pond are neat and consistent. At the same time, about 50 grams of flowers, 300-400 silver carp and 200 bream can be kept in the pond water.

Third, feed carefully.

Small fish and minced meat are put in within 3 days after seedling release, and small miscellaneous fish, minced meat or compound feed are put in after 3 days, 1 month. When the shrimp seedlings grow to 6-7 cm, they can all be fed with crushed snails and mussels and appropriate plant feed such as wheat, bran, corn and cake or compound feed. The daily feeding amount is based on satiety, eating and leaving no residual bait. Generally, crayfish and adults are fed at 15%-20% of their body weight, which can be adjusted according to their eating conditions. Feed twice a day, once in the morning and once in the evening, and the feeding amount at night accounts for 70%-80% of the daily feeding amount. Bait should be thrown around the pond, and properly dispersed, mostly in places where lobsters are concentrated to facilitate their feeding.

Fourth, water quality management.

Lobsters grow fast, have vigorous metabolism and high oxygen consumption. Therefore, the water quality of shrimp ponds should be kept fresh, and water should be added to the depth of 15-20cm every week to ensure that the water quality is fresh, clean and cool, and there is enough dissolved oxygen. The transparency of the pool water should be controlled above 35cm. When the weather is overheated, the pool water should be deepened appropriately to stabilize the water temperature. Strictly prevent water quality from industrial pollution, pesticide pollution and chemical pollution.

When the dissolved oxygen in the water is low, the water quality is aging, or severe weather such as thunderstorm, sultry and even cloudy days, the feeding amount should be reduced or stopped, and attention should be paid to observation. If the lobster is found to be unresponsive, it will swim to the shore and climb to the shore with its head floating, indicating that the lack of oxygen is serious, and it is necessary to inject water or start the aerator to aerate in time.

Verb (abbreviation for verb) disease prevention

Qin Ying often inspected and patrolled the pond, paying attention to the lobster's foraging, activities, growth and molting, so as to take necessary technical measures in time. Remove the moss in the pool in time; Check the filter screens at the entrance and exit frequently to prevent the lobster from escaping or the harmful organisms such as wild fish from entering due to the damage of the filter screens. Always pay attention to whether there are harmful organisms in the pool, such as water rats, water snakes, water birds and so on. If there is, it should be removed in time.

Disinfect the body surface of shrimp seedlings before they go into the pond to prevent pathogens from being brought into the pond. Disinfect shrimp ponds with quicklime regularly, often add fresh water to keep the pond water clean and sanitary, and add various vitamins to shrimp feed to enhance the immunity of shrimp.

Six, timely fishing

Generally, it lasts about 2 months. When the lobster weighs more than 50 grams, it can be caught in the market. Lobsters are caught in shrimp cages, ground cages and purse seines. And catch the big ones and leave the small ones.