-
Detailed Explanation of River Crab Farming Methods and Key Points of Daily Management
River crab is also called "crab" and "hairy crab". Its carapace, formed by the fusion of the head and thorax, is squarish-round and hard in texture. River crab is a poikilothermic crustacean, and its suitable water temperature for growth is 15-25°C. Doing a good job in the farming management during the river crab growing period can improve river crab quality and yield
-
How to Farm River Snails for High Yield? Here Comes the Detailed Technique Guide
Currently, river snails have become a very popular snack in many parts of our country. As market demand increases, wild river snails are becoming fewer and fewer, and artificially farming river snails is becoming more and more popular. Below is a detailed guide to high-yield river snail farming techniques.
-
What do river shrimp eat, and how much profit per mu can be made from farming them
River shrimp are a type of freshwater shrimp with relatively high nutritional value and a delicious taste; after being dried, they are well loved by everyone when used in cooking. As the saying goes, big fish eat small fish, and small fish eat shrimp, so have you ever thought about what river shrimp eat? Nowadays some farmers are engaged in river
-
Five Key Points of the Nutritional Program for River Crab Farming
1. Protecting the liver. The liver is an important metabolic organ of the river crab, serving functions such as detoxification, blood production and oxygen transport, secretion of digestive enzymes, and absorption of nutrients. As the river crab molts and grows, the load on the liver increases, making it prone to pathological changes, which leads to a decline in constitution and immunity,
-
Three key measures for artificial farming of river crabs
Artificial breeding of river crab seedlings is the key link in river crab production. Only when this step is done well can a large quantity of high-quality crab seedlings be provided, laying the foundation for the entire farming process. I. Preliminary preparation work for seedling rearing 1. Cleaning and disinfection of rearing ponds: 3 to 5 days before the larvae are released,
-
Nutritional Requirements of River Crab Farming and Experience in Compound Feed Production
The river crab is a unique aquatic delicacy of China, renowned at home and abroad for its high nutritional value and distinctive flavor, and has become an important export product for earning foreign exchange. Therefore, from lakes and reservoirs to ponds and rice fields, river crab farming is being promoted on a large scale. The rapid
-
Detailed Explanation of New Techniques for Artificial Freshwater Farming of River Crab
River crab, commonly known as crab, also called hairy crab, mitten crab, etc. It belongs to the class Crustacea, family Grapsidae. The cephalothorax is squarish-oval, generally 6-7 cm long, usually green. The chelipeds are powerful and densely covered with downy hair, and the walking legs are flattened laterally and long. Wild river crabs live in the muddy beaches of the embankments of rivers, lakes and marshes,
-
How centipede farmers can manage the hibernation period well
In the middle and lower reaches of the Yangtze River, centipedes enter hibernation in November each year. At this time, the centipedes' outdoor activity gradually decreases, their food intake also gradually decreases, and they gradually move deeper into the rearing soil, building their own hibernation nests in a suitable soil layer. As the temperature drops further
-
How to prevent and treat common diseases in river crab farming
I. Shell ulcer disease 1. Symptoms: Ulcerative lesions occur on the crab's exoskeleton. In the early stage, there are many brown spots on the shell, with each spot having a slightly reddish depressed center. In the late stage, the edges of the spots turn black, the ulcers in the center deepen, and the shell is eroded into holes, exposing muscle
-
Experience Sharing on Placing Fish-Rearing Cages in Flat-Bottomed Rivers
In flat-bottomed rivers with a water depth of more than 2.5 m and little year-round variation in water level, fish farming with cages works very well. 1) Generally speaking, a height of 50 cm between the cage bottom and the riverbed is sufficient. Leaving a gap between the cage bottom and the riverbed facilitates water flow, which first adds oxygen and second serves to exchange water ⟦4 <p>In flat-bottomed rivers with a water depth of more than 2.5 m and little year-round variation in water level, fish farming with cages works very well. </p><p></p><p>1) Generally speaking, a height of 50 cm between the cage bottom and the riverbed is sufficient. Leaving a gap between the cage bottom and the riverbed facilitates water flow, which first adds oxygen and second serves to exchange water and improve water quality. The height of the cage body can be 2.5-3 m. After this depth is immersed in water, 50 cm of netting is left above the water surface to prevent jumping fish from escaping. It is best to cover the top with netting to prevent birds from stealing and eating the fish. </p><p>2) It must be noted that the cage should be placed in a sunny spot, a place with a gentle flow speed, or a place with backflow. As far as the whole river channel is concerned, backflow areas are often places where fish gather; backflow areas have gentle flow speeds and abundant feed, making them very suitable for fish growth. </p><p>3) If the river channel is not deep, moso bamboo can be driven in as stakes, the cage tied with ropes, and marker lines indicating the cage's draught depth marked on the stakes, making it easy to adjust in time and stabilize the cage depth. Use slip knots for the ropes to make it easy to raise and lower the cage body. </p><p>4) For this fixed-type cage, tie straight strip-like objects along the top and bottom ropes of the cage body; for example, thin bamboo poles can be used for the top and bottom ropes, and iron bars can also be used for the bottom rope, stretching the entire cage flat and straight, avoiding folding of the netting in the water and reducing capacity. Install rings at the four corners of the cage. When in use, fit the rings at the four corners onto the bamboo stakes, and the formed cage will be firmly tied to the bamboo stakes and ready for farming. The rings can also be tied to the bamboo stakes, four on the top and four on the bottom, using pull ropes to control the entire cage body, following the rise and fall of the water level, and adjusting the draught depth of the cage body in time. In places with gentle flowing water, feed is most abundant. When the cage body is flat and straight, the fish are most comfortable. </p>
条件筛选