Can you keep lobsters in the north? What do you need to raise lobsters? Thank you! 10

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Freshwater lobster habitats often move seasonally, and the water temperature rises in spring, and shrimp mostly move in shallow water. In midsummer, when the temperature is not high, it moves to deep water; Winter wintering in the hole. Freshwater lobsters also molt, grow, and reproduce in burrows to prevent injury, and the shrimp is shade-prone and light-phobic, crawling out of burrows when light is low or dark. During the rainy season, freshwater lobsters also often climb onto land for activities.

The shrimp also has a strong ability to tolerate hunger, generally able to withstand hunger for 3 to 5 days; In autumn and winter, you generally do not eat for 20 to 30 days and do not starve to death. The optimum temperature for feeding is 25 30 ; Water temperature below 15 and activity decreases; Water temperature below 10 or above 35 Significant reduction in feeding; When the water temperature is below 8, it enters the overwintering period and stops feeding. Freshwater lobsters generally have a lifespan of 20 months for males and 24 months for females.

In addition, the north can also be raised indoors!

Conditions: Lobsters have wide adaptability and strong fecundity, and can be farmed in rivers, lakes, ponds or paddy fields. Among them, pond culture, easy feeding management, wide feed and high yield, is an important form of lobster farming. Its breeding technology points:

1. Breeding facilities: the pond area is 5-10 acres, the water depth is about 1 meter, the pond silt is within 5 cm, the bottom of the pond should dig a shrimp ditch with a width of 2 meters and a depth of meters, and the anti-escape facilities should be laid around the pond.

2. Preparation before stocking.

1. Water treatment: 20 days before stocking, drain the pool water, and thoroughly remove and disinfect each mu with 75 kg of quicklime or bleaching powder, bleaching powder essence and other drugs;

2. Apply sufficient base fertilizer: apply 500-600 kg of decomposed livestock and poultry manure per mu to cultivate rotifers, cladopods and copepod microorganisms, and provide palatable bait for shrimp seedlings and shrimp species;

3. Plant aquatic plants: plant forage grasses such as water peanuts and rye grass by the pond, and plant an appropriate amount of water hyacinth, water peanuts, and water spinach on the water surface, and plant moss grass and goldfish algae at the bottom of the water. This is conducive to lobsters' feeding, molting, breeding and other activities, and reducing their cannibalism;

3. Stocking of shrimp seedlings and shrimp seeds.

Generally, 40-60 kg of broodstock with eggs per mu is stocked in April or 80-120 kg of juvenile shrimp per mu is stocked in May.

Fourth, scientific feeding.

Lobsters are varied and gluttonous. In terms of feed feeding, it is necessary to grasp well: according to the nutritional needs of lobsters at different growth and development stages, do a good job in the combination and feeding of feed; Feed lobsters according to their living habits and feeding characteristics; Feed reasonably according to the weather, water quality changes and shrimp activity and feeding.

5. Daily management.

Establish a system of inspection of ponds, regulate water quality, and strengthen the management of habitat shedding sites and anti-escape facilities.

6. Commercial shrimp fishing.

Crayfish breed in stinky ditches There are many stinky ditches in the south.

Crayfish raising conditions: need to have a suitable site, correct breeding, suitable feed and scientific control. Technology: scientific and reasonable fishing, do a good job in breeding planning.

1.If you want to breed crayfish, the right place is very important, crayfish for water quality requirements are actually very high, so there can be no factory next to the pond used to breed crayfish, and the adjacent water source can not be a polluted water source, and the pond can be properly stocked with some herbivorous fish.

2.Although crayfish reproduce relatively quickly, crayfish are very fragile during the juvenile shrimp period, so predators such as water rats and carnivorous fish in the pond must be cleaned up, and it is also necessary to create ridges on the pond for crayfish to live in, and plant some aquatic plants before putting crayfish down.

3.Crayfish are not picky about bait, but if you want crayfish to grow fast and well, you should try to provide it with some high-energy, high-calorie food, such as protein products of various animals and plants and processed foods such as soybean cakes, rice bran, and sake lees, so that crayfish can grow strong enough and fast.

4.Crayfish are easy to climb on the ground to escape, especially if it rains and accumulates water, so the pond where crayfish are raised should be fenced off, and the pond should be regularly inspected to prevent crayfish from escaping or predators from predators, and the water should be changed regularly and drugs should be applied to crayfish to purify the water, so that the yield of crayfish can be guaranteed.

Lobsters are good to farm, and the following conditions are required.

1. Prepare the shrimp pond.

The venue is a ventilated and sunny place with a quiet environment. The pond chosen is about 70 cm to 150 cm. The bottom of the pool is flat, and there is a slight slope around the pool, and there is a good inclination to facilitate the establishment of the drainage outlet.

The ridge of the pond is about 45 cm higher than the water surface, and the width of the ridge should reach 60 cm to prevent the lobster from burrowing and filtering the water.

2. Water source management.

The metabolism of lobster is relatively vigorous, and it is always necessary to pay attention to keeping the water quality of the shrimp pond fresh, and the transparency is about 30 cm. Water can be added weekly, about 15-20 cm deep, to keep the water clean and fresh. When the weather is too hot, the pool water should be deepened appropriately to stabilize the pool water temperature.

Strictly prevent water quality from industrial pollution, pesticide pollution and chemical pollution.

In case of bad weather thunderstorms and cloudy days or poor water quality and low dissolved oxygen, reduce the amount of bait or stop feeding, and pay attention to observation, for the lobster that climbs ashore with anoxic floating head to fill water or take aeration measures, such as opening an aerator machine.

3. Preparation for feeding.

The length of stocked shrimp fry is about 2-4 cm, and the number of shrimp fry per mu is maintained at an average of 6,000. Generally, a pond of shrimp fry is the size of a pond. Within 3 days after the seedlings are released, the prepared minced fish and minced meat are put in, and then fed with small trash fish, minced meat or compound feed; When the shrimp seedlings grow to 6-7 cm, not only meat but also plant feed can be increased.

The daily feeding amount is based on full, eating, leaving no residual bait, generally medium and small crayfish are fed according to 15%-20% of body weight, and adult shrimp are fed according to 5%-10% of body weight, which can be adjusted according to the eating situation of shrimp. Feed 2 times a day, once in the morning and once in the evening, feed mainly at night, scatter when sprinkling, and cast more places where lobsters are gathered.

3. Arrest. The growth rate of lobsters is very fast, generally two or three months can be **, we should pay attention when we catch, not all at one time, but in batches**, we should pay attention to the big ones when we catch them.

The small ones are put back into the farm to grow for a period of time and then come to catch, and every time you catch them, you have to put some shrimp seedlings to go, so that you will not be out of stock in the future, and you can catch and sell them at any time, so that you can also increase the output of lobsters.

Crayfish farming environment requirements:

1. Water temperature. Crayfish is a wide-temperate aquatic animal, its water temperature adaptation range is 0 37 °C, the suitable water temperature for growth is 18 31 °C, the optimal growth water temperature is 22 30 °C, and the water temperature for fertilized egg hatching and larval development is 24 28 °C. When the water temperature drops below 10°C, the crayfish stop feeding and burrow into the burrows to overwinter.

In summer, when the water temperature exceeds 35°C, the feeding intake of crayfish decreases, and in the natural environment, it will burrow at the bottom of the burrow at the low temperature. Prolonged high temperatures can lead to death, so shade and cooling measures should be taken.

2. Dissolved oxygen. Maintaining a certain degree of phytoplankton in the shrimp pond has a greater effect on improving the dissolved oxygen in the water body. The gills in the cuirass of the crayfish head are very developed, as long as they are kept moist, they can breathe, they have a strong ability to use the oxygen in the air, and the short-term lack of oxygen in the aquaculture water body generally does not lead to the death of the crayfish.

Therefore, the survival of crayfish does not require as much dissolved oxygen in the water as other fish, but the growth requirements are higher, and the dissolved oxygen content of the water body should be kept above 3 milliliters in order for crayfish to grow normally.

3. Organic matter.

The presence of organic matter in the water has a positive effect on crayfish, and the appropriate oxygen consumption of organic matter is 20-40 mg liters; If it exceeds 50 milliliters, it will be harmful to the crayfish, at this time, it should be replaced with new water to improve the water quality.

4. Control of hazardous substances.

There are two types of toxic substances in aquaculture waters: one is caused by external pollution, and the other is the poisons generated and accumulated by the imbalance of the internal material circulation of the water body, such as hydrogen sulfide and nitrogen-containing substances such as ammonia and nitrite.

5. Soil and sediment.

The soil used to build the shrimp pond is loam or clay, which is not easy to seep water, can retain water and save energy, and is also conducive to crayfish digging burrows and avoiding the use of sand. Crayfish live benthically, and too much or too little silt will affect their growth. Too much silt and a large amount of oxygen consumption in organic matter make the bottom water lack oxygen for a long time, which is easy to lead to diseases; If there is too little silt, it will not play the role of fertilizer supply, fertilizer preservation, bait and water quality improvement.

Generally speaking, the thickness of the silt at the bottom of the pond is maintained at 15 to 20 cm, which is conducive to the healthy growth of crayfish.

The south is suitable for breeding, and crayfish stocking should test the water, and the shrimp can only be released after testing the safety of the water. 10,000 juvenile shrimp are put into each mu, and quicklime is regularly sprinkled to increase the calcium content in the water body, and the amount of night feed is increased, mainly with compound feed.

In the shrimp ditch and the field to transplant aquatic plants, such as bitter grass, black algae, goldfish algae and other submerged plants, aquatic weeds coverage of 30% is appropriate, and sporadic and scattered is better, which is conducive to the smooth flow of water in the shrimp ditch without blockage.

Use plastic film, cement board, asbestos tile or calcium-plastic board to build an escape wall around the field to prevent crayfish from escaping.

It's best not to raise it unless you're willing to spend money to improve the quality of your farming.

There are many wild ones in the Songhua River, Nenjiang River, and Mudanjiang River, which are called "crickets" by the locals.