CATDOLL : CATDOLL: Can Northeast Crayfish Farming Be Successful?

1. Can Northeast Crayfish Cultivation Be Successful?

The Northeast Crayfish can be successfully cultivated. The Northeast Crayfish is a river shrimp. It likes to live among the stones in clear streams. It hides under the stones during the day and crawls out to look for food after dusk. It is omnivorous. The optimal temperature for growth is 12-28℃. It mainly feeds on small fish, tadpoles and aquatic insects in the river. When cultivating crayfish, you should master the correct feeding method, mainly feeding fish meat, supplemented by artificial feed, oats and soybeans. Stop feeding when the water temperature is lower than 6℃ or higher than 27℃.

1. Can Northeast Crayfish Cultivation Be Successful?

|Crayfish prefer running water, so the water needs to be kept clean and flowing. Generally, by mastering mature breeding techniques, ensuring a good living environment, and doing a good job of daily management, you can successfully breed crayfish in the Northeast.

2. Northeast crayfish breeding technology

1. The Northeast Crayfish is an omnivorous and carnivorous shrimp. It should be fed with artificial feed with high protein content, mainly fish meat, supplemented by artificial feed, oats and soybeans. The Northeast Crayfish is in a critical growth period under suitable water temperature. The daily feeding amount is based on fullness and no residual bait to avoid feed residues from polluting the water quality. The body length of the Crayfish is 1-3 cm, and it is generally fed at 10%-20% of its body weight. The body length of the Crayfish is 3-5 cm, and it is generally fed at 5%-10% of its body weight. The body length of the Crayfish is more than 5 cm, and it is fed at 15% of its body weight, once in the morning and once in the evening. The amount fed in the evening accounts for 80% of the total daily feeding amount.

2. The breeding density of Northeast crayfish should be adjusted in a timely manner based on factors such as breeding water temperature, individual size, growth stage and breeding environment. For crayfish weighing 5-8 grams, the breeding density is 80-100 per square meter; for crayfish weighing 8-10 grams, the breeding density is 50-70 per square meter.

3. The tolerant water temperature of Northeast cicada is 2-31℃, and the suitable water temperature for its growth is 16-21℃. When the water temperature is lower than 12℃ or higher than 25℃, the cicada's food intake decreases, and the amount of food fed should be reduced appropriately. When the water temperature is lower than 6℃ or higher than 27℃, the cicada starts to dig holes to hibernate and escape the summer heat, and feeding should be stopped at this time.

4. Do a good job in disease prevention for Manchurian cicadas, including daily water quality adjustment, intestinal conditioning, regular addition of vitamin C and probiotics, etc.

2. Is it suitable to raise shrimp in Northeast China? What kind of fish is best to raise in Northeast China that is both delicious, expensive and easy to sell?

It is not suitable for shrimp farming because the climate is cold and the temperature is abnormal and not suitable for shrimp survival.

1. Old man fish has a big head, a wide mouth, a flat and disc-shaped front half of the body, a small tail, a yellowish-brown back, and a light-colored belly. As a native fish of Northeast my country, it is often eaten after being braised or fried. Due to its unique flavor and rich nutrition, with the acceleration of social development, the living environment of old man fish is threatened, and the amount of resources has decreased dramatically, which has caused the price of old man fish to rise rapidly.

2. The Smooth salmon grows slowly, with the largest individual being less than 20 cm. However, the Smooth salmon is full of meat and is also called meat roller. This fish has been favored by the market in recent years because of its very high requirements for water quality environment. Now the number of wild ones has sharply decreased, and one catty now costs about 200 yuan.

3. The largest river shrimp in Northeast China

The Northeast Mantis Cricket (scientific name: Cambaroides dauricus) is an animal of the family Cambaroididae and the genus Cambaroides. The female body length is 70-84 mm, and the maximum body length is 107 mm. It weighs 13-35 grams, divided into cephalothorax and abdomen. The head is covered by a hard shell and cannot move. It is divided into 20 segments, including 5 cephalothorax segments, 8 thorax segments, and 7 abdominal segments. Except for the last segment without abdomen, there are 19 pairs of abdominal limbs. There is a pair of eyes on the head, with eye stalks, which can rotate. There are 5 pairs of abdominal limbs, including 1 pair of small antennae, 1 pair of large antennae, 2 pairs of large jaws, and 8 pairs of abdominal limbs on the chest. The first 3 pairs are maxillopods, and the last 5 pairs are walking legs. The first pair of chelicerae is particularly developed. There are 6 pairs of limbs on the abdomen, which are swimming legs. Among them, the sixth pair of abdominal legs is particularly wide and is the tail leg, which forms the tail fan or tail fin together with the tail segment. The growth of mantis crickets is achieved by molting.

It likes to live among rocks in clear streams, hiding under rocks during the day and crawling out to look for food after dusk. It is omnivorous and its optimal growth temperature is 12-28℃. After October, it swims to deep water to hibernate, and lives and fattens in shallow waters after the river opens the following year. It feeds on small fish, tadpoles, and aquatic insects in the river. It also eats overwintering wood frogs in winter. [1] It is mainly distributed in the Heilongjiang River Basin in China, the Ergun River Wetland Reserve in Russia, and the Trilateral Reserve between China, Russia, and Mongolia. It is also distributed in northern North Korea. [2]

4. How big can grass shrimp grow in Northeast China?

In Northeast China, grass shrimp can grow up to 33cm long. According to the relevant information:

1. Grass shrimps are strong in vitality, have delicious meat, and are large in size. They are the largest species in the genus Penaeus. The largest female shrimp is up to 33 cm long and weighs more than 500 g. They have two pairs of small claws. The inner surfaces of the two fingers of the claws are concave and slightly spoon-shaped. There are brush-like hairs (setae) at the end of the spoon fingers. They are a sharp weapon for scraping algae, so they often scrape algae for food, but their algae-clearing skills are not as good as those of Yamato algae shrimps. Their body color is extremely changeable and will change color with changes in the environment.

2. Under certain circumstances (female shrimp is frightened, water quality changes suddenly), the female shrimp may kick out the eggs in her abdomen, or directly molt and discard all the eggs (the eggs are stuck to the swimming feet on the shrimp's abdomen), or the female shrimp carrying eggs may die unexpectedly.